Re: [WARNING - NOT Solved] SVG widget for the Admin

[Mike Dewhirst]

On 9/06/2021 12:44 pm, Mike Dewhirst wrote:

Do not use this solution.

The Svg_AdminTextareaWidget code below deletes data on saving.

I think the reason might be that on saving it tries to save the image 
instead of the image source code.


I'm now digging deeper and will report back.


I can't find a solution. I do have a workaround ...

Added an extra models.TextField (dstructure) and copy the ddstructure 
contents into it pre-save then display dstructure in the admin using the 
Svg_AdminTextareaWidget shown below.


So that's two fields and double the storage. I suppose disk space is cheap.

Cheers

Mike



Mike

On 7/06/2021 6:00 pm, Mike Dewhirst wrote:

Thanks Derek - it is now working as follows ...


 class Chemical(models.Model):
    ...
    ddstructure = models.TextField(null=True, blank=True, 
verbose_name="2D structure")

    ...


class Svg_AdminTextareaWidget(AdminTextareaWidget):
    def render(self, name, value, attrs=None, renderer=None):
    if value:
    return force_text(self.format_value(value))


class ChemicalAdmin(admin.ModelAdmin):
    ...
    def formfield_for_dbfield(self, db_field, request, **kwargs):
    if db_field.name == 'ddstructure':
    kwargs['widget'] = Svg_AdminTextareaWidget
    return super().formfield_for_dbfield(db_field, request, **kwargs)
    ...

Cheers

Mike


On 7/06/2021 11:50 am, Mike Dewhirst wrote:

On 6/06/2021 6:14 pm, Derek wrote:
RE - "I've looked at the AdminTextareaWidget which is probably 
based on the TextInput built-in widget but see no way to influence 
what it does. " and "How do I get it to display inline in the 
proper place?"


There seems to be similar question on SO:

https://stackoverflow.com/questions/6239966/add-custom-html-between-two-model-fields-in-django-admins-change-form 



The answer with AdminFooWidget() and FooAdminForm() seems closest 
to your use case.


Thanks for that. Unfortunately the answer at that link is ten years 
old and I think Django Admin must have moved on since then. I'm 
still trying to debug an inexplicable KeyError but I think I 
understand the approach.


I'll keep trying

Cheers

mike




On Sun, 6 Jun 2021 at 09:56, Mike Dewhirst > wrote:


On 4/06/2021 5:15 pm, Derek wrote:

Hi Mike

The SVG is not going to display as SVG in a *form* - for that
you'd need a widget, or perhaps just let users edit the text.


OK - I'm outta my depth here. I've looked at the
AdminTextareaWidget which is probably based on the TextInput
built-in widget but see no way to influence what it does. In
theory I'd create a new widget inheriting from that and use
mark_safe() somehow.

Then I would need to tell the admin form to use it for my
ddstructure field.

BUT see my template effort below



Did you try displaying in the normal admin lists? This was my
understanding of where you wanted to see it and the code
snippets I posted were for that purpose.

If you want to see it as "read only" in the form, but shown as
SVG, perhaps you need a custom model template

(https://docs.djangoproject.com/en/dev/ref/contrib/admin/#templates-which-may-be-overridden-per-app-or-model

)


Again, my feet don't touch bottom. I tried adding some code to
change_form.html like this ...

{% extends "admin/change_form.html" %}

{% block content %}{{ block.super }}
{% if original.ddstructure %}
    {{ original.ddstructure | safe }}
{% else %}
    No 2D structure image 
{% endif %}

{% endblock %}

This kinda worked. It comes after block.super so it displays
the svg image correctly but at the bottom of the page. AND the
raw (or safe) code also displays in the location where I really
want the image.

So close but ...

How do I get it to display inline in the proper place?

Many thanks for hanging in there

Cheers

Mike




Derek


On Thursday, 3 June 2021 at 08:22:57 UTC+2 Mike Dewhirst wrote:

On 3/06/2021 4:00 pm, Derek wrote:
> >
> > E.g.
> >
> > class MyModel():
> >     svg_text = CharField()
>
> in my case it is ...
>
> class Chemical(models.Model):
>     ...
>     ddstructure = models.TextField(
>     null=True,
>     blank=True,
>     verbose_name="2D structure",
>     )
>

The above is unchanged.

# admin
class ChemicalAdmin(admin.ModelAdmin):

    def _ddstructure(self, obj):
        return mark_safe(obj.ddstructure)
    ...
    fieldsets = (
    (
    None,
    {
  

[WARNING - NOT Solved] SVG widget for the Admin

[Mike Dewhirst]

Do not use this solution.

The Svg_AdminTextareaWidget code below deletes data on saving.

I think the reason might be that on saving it tries to save the image 
instead of the image source code.


I'm now digging deeper and will report back.

Mike

On 7/06/2021 6:00 pm, Mike Dewhirst wrote:

Thanks Derek - it is now working as follows ...


 class Chemical(models.Model):
    ...
    ddstructure = models.TextField(null=True, blank=True, 
verbose_name="2D structure")

    ...


class Svg_AdminTextareaWidget(AdminTextareaWidget):
    def render(self, name, value, attrs=None, renderer=None):
    if value:
    return force_text(self.format_value(value))


class ChemicalAdmin(admin.ModelAdmin):
    ...
    def formfield_for_dbfield(self, db_field, request, **kwargs):
    if db_field.name == 'ddstructure':
    kwargs['widget'] = Svg_AdminTextareaWidget
    return super().formfield_for_dbfield(db_field, request, **kwargs)
    ...

Cheers

Mike


On 7/06/2021 11:50 am, Mike Dewhirst wrote:

On 6/06/2021 6:14 pm, Derek wrote:
RE - "I've looked at the AdminTextareaWidget which is probably based 
on the TextInput built-in widget but see no way to influence what it 
does. " and "How do I get it to display inline in the proper place?"


There seems to be similar question on SO:

https://stackoverflow.com/questions/6239966/add-custom-html-between-two-model-fields-in-django-admins-change-form 



The answer with AdminFooWidget() and FooAdminForm() seems closest to 
your use case.


Thanks for that. Unfortunately the answer at that link is ten years 
old and I think Django Admin must have moved on since then. I'm still 
trying to debug an inexplicable KeyError but I think I understand the 
approach.


I'll keep trying

Cheers

mike




On Sun, 6 Jun 2021 at 09:56, Mike Dewhirst > wrote:


On 4/06/2021 5:15 pm, Derek wrote:

Hi Mike

The SVG is not going to display as SVG in a *form* - for that
you'd need a widget, or perhaps just let users edit the text.


OK - I'm outta my depth here. I've looked at the
AdminTextareaWidget which is probably based on the TextInput
built-in widget but see no way to influence what it does. In
theory I'd create a new widget inheriting from that and use
mark_safe() somehow.

Then I would need to tell the admin form to use it for my
ddstructure field.

BUT see my template effort below



Did you try displaying in the normal admin lists? This was my
understanding of where you wanted to see it and the code
snippets I posted were for that purpose.

If you want to see it as "read only" in the form, but shown as
SVG, perhaps you need a custom model template

(https://docs.djangoproject.com/en/dev/ref/contrib/admin/#templates-which-may-be-overridden-per-app-or-model

)


Again, my feet don't touch bottom. I tried adding some code to
change_form.html like this ...

{% extends "admin/change_form.html" %}

{% block content %}{{ block.super }}
{% if original.ddstructure %}
    {{ original.ddstructure | safe }}
{% else %}
    No 2D structure image 
{% endif %}

{% endblock %}

This kinda worked. It comes after block.super so it displays the
svg image correctly but at the bottom of the page. AND the raw
(or safe) code also displays in the location where I really want
the image.

So close but ...

How do I get it to display inline in the proper place?

Many thanks for hanging in there

Cheers

Mike




Derek


On Thursday, 3 June 2021 at 08:22:57 UTC+2 Mike Dewhirst wrote:

On 3/06/2021 4:00 pm, Derek wrote:
> >
> > E.g.
> >
> > class MyModel():
> >     svg_text = CharField()
>
> in my case it is ...
>
> class Chemical(models.Model):
>     ...
>     ddstructure = models.TextField(
>     null=True,
>     blank=True,
>     verbose_name="2D structure",
>     )
>

The above is unchanged.

# admin
class ChemicalAdmin(admin.ModelAdmin):

    def _ddstructure(self, obj):
        return mark_safe(obj.ddstructure)
    ...
    fieldsets = (
    (
    None,
    {
    "fields": (
    "ddstructure",        # displays svg code
    "_ddstructure",
                    ...
            }
    ),

FYI it works perfectly as a column in the list display -
but I don't
need it there, rather in the page for the chemical.

This is 

Re: [Solved] SVG widget for the Admin

[Derek]

Good to hear!  Django once again proving capable, once you figure it out.

Am reminded of the Zen:

"There should be one-- and preferably only one --obvious way to do it.
Although that way may not be obvious at first unless you're Dutch."


On Mon, 7 Jun 2021 at 10:00, Mike Dewhirst  wrote:

> Thanks Derek - it is now working as follows ...
>
>
>  class Chemical(models.Model):
> ...
> ddstructure = models.TextField(null=True, blank=True, verbose_name="2D
> structure")
> ...
>
>
> class Svg_AdminTextareaWidget(AdminTextareaWidget):
> def render(self, name, value, attrs=None, renderer=None):
> if value:
> return force_text(self.format_value(value))
>
>
> class ChemicalAdmin(admin.ModelAdmin):
> ...
> def formfield_for_dbfield(self, db_field, request, **kwargs):
> if db_field.name == 'ddstructure':
> kwargs['widget'] = Svg_AdminTextareaWidget
> return super().formfield_for_dbfield(db_field, request, **kwargs)
> ...
>
> Cheers
>
> Mike
>
>
> On 7/06/2021 11:50 am, Mike Dewhirst wrote:
>
> On 6/06/2021 6:14 pm, Derek wrote:
>
> RE - "I've looked at the AdminTextareaWidget which is probably based on
> the TextInput built-in widget but see no way to influence what it does. "
> and "How do I get it to display inline in the proper place?"
>
> There seems to be similar question on SO:
>
>
> https://stackoverflow.com/questions/6239966/add-custom-html-between-two-model-fields-in-django-admins-change-form
>
> The answer with AdminFooWidget() and FooAdminForm() seems closest to your
> use case.
>
>
> Thanks for that. Unfortunately the answer at that link is ten years old
> and I think Django Admin must have moved on since then. I'm still trying to
> debug an inexplicable KeyError but I think I understand the approach.
>
> I'll keep trying
>
> Cheers
>
> mike
>
>
>
> On Sun, 6 Jun 2021 at 09:56, Mike Dewhirst  wrote:
>
>> On 4/06/2021 5:15 pm, Derek wrote:
>>
>> Hi Mike
>>
>> The SVG is not going to display as SVG in a *form* - for that you'd need
>> a widget, or perhaps just let users edit the text.
>>
>>
>> OK - I'm outta my depth here. I've looked at the AdminTextareaWidget
>> which is probably based on the TextInput built-in widget but see no way to
>> influence what it does. In theory I'd create a new widget inheriting from
>> that and use mark_safe() somehow.
>>
>> Then I would need to tell the admin form to use it for my ddstructure
>> field.
>>
>> BUT see my template effort below
>>
>>
>> Did you try displaying in the normal admin lists? This was my
>> understanding of where you wanted to see it and the code snippets I posted
>> were for that purpose.
>>
>> If you want to see it as "read only" in the form, but shown as SVG,
>> perhaps you need a custom model template (
>> https://docs.djangoproject.com/en/dev/ref/contrib/admin/#templates-which-may-be-overridden-per-app-or-model
>> )
>>
>>
>> Again, my feet don't touch bottom. I tried adding some code to
>> change_form.html like this ...
>>
>> {% extends "admin/change_form.html" %}
>>
>> {% block content %}{{ block.super }}
>> {% if original.ddstructure %}
>> {{ original.ddstructure | safe }}
>> {% else %}
>> No 2D structure image 
>> {% endif %}
>>
>> {% endblock %}
>>
>> This kinda worked. It comes after block.super so it displays the svg
>> image correctly but at the bottom of the page. AND the raw (or safe) code
>> also displays in the location where I really want the image.
>>
>> So close but ...
>>
>> How do I get it to display inline in the proper place?
>>
>> Many thanks for hanging in there
>>
>> Cheers
>>
>> Mike
>>
>>
>>
>> Derek
>>
>>
>> On Thursday, 3 June 2021 at 08:22:57 UTC+2 Mike Dewhirst wrote:
>>
>>> On 3/06/2021 4:00 pm, Derek wrote:
>>> > >
>>> > > E.g.
>>> > >
>>> > > class MyModel():
>>> > > svg_text = CharField()
>>> >
>>> > in my case it is ...
>>> >
>>> > class Chemical(models.Model):
>>> > ...
>>> > ddstructure = models.TextField(
>>> > null=True,
>>> > blank=True,
>>> > verbose_name="2D structure",
>>> > )
>>> >
>>>
>>> The above is unchanged.
>>>
>>> # admin
>>> class ChemicalAdmin(admin.ModelAdmin):
>>>
>>> def _ddstructure(self, obj):
>>> return mark_safe(obj.ddstructure)
>>> ...
>>> fieldsets = (
>>> (
>>> None,
>>> {
>>> "fields": (
>>> "ddstructure",# displays svg code
>>> "_ddstructure",
>>> ...
>>> }
>>> ),
>>>
>>> FYI it works perfectly as a column in the list display - but I don't
>>> need it there, rather in the page for the chemical.
>>>
>>> This is what happens if it is included in the fieldsets "fields" roster.
>>>
>>>
>>> FieldError at /admin/chemical/chemical/17/change/
>>>
>>> Unknown field(s) (_ddstructure) specified for Chemical. Check
>>> fields/fieldsets/exclude attributes of class ChemicalAdmin.
>>>
>>> Request Method: GET
>>> Request URL: 

[Solved] SVG widget for the Admin

[Mike Dewhirst]

Thanks Derek - it is now working as follows ...


 class Chemical(models.Model):
    ...
    ddstructure = models.TextField(null=True, blank=True, 
verbose_name="2D structure")

    ...


class Svg_AdminTextareaWidget(AdminTextareaWidget):
    def render(self, name, value, attrs=None, renderer=None):
    if value:
    return force_text(self.format_value(value))


class ChemicalAdmin(admin.ModelAdmin):
    ...
    def formfield_for_dbfield(self, db_field, request, **kwargs):
    if db_field.name == 'ddstructure':
    kwargs['widget'] = Svg_AdminTextareaWidget
    return super().formfield_for_dbfield(db_field, request, **kwargs)
    ...

Cheers

Mike


On 7/06/2021 11:50 am, Mike Dewhirst wrote:

On 6/06/2021 6:14 pm, Derek wrote:
RE - "I've looked at the AdminTextareaWidget which is probably based 
on the TextInput built-in widget but see no way to influence what it 
does. " and "How do I get it to display inline in the proper place?"


There seems to be similar question on SO:

https://stackoverflow.com/questions/6239966/add-custom-html-between-two-model-fields-in-django-admins-change-form 



The answer with AdminFooWidget() and FooAdminForm() seems closest to 
your use case.


Thanks for that. Unfortunately the answer at that link is ten years 
old and I think Django Admin must have moved on since then. I'm still 
trying to debug an inexplicable KeyError but I think I understand the 
approach.


I'll keep trying

Cheers

mike




On Sun, 6 Jun 2021 at 09:56, Mike Dewhirst > wrote:


On 4/06/2021 5:15 pm, Derek wrote:

Hi Mike

The SVG is not going to display as SVG in a *form* - for that
you'd need a widget, or perhaps just let users edit the text.


OK - I'm outta my depth here. I've looked at the
AdminTextareaWidget which is probably based on the TextInput
built-in widget but see no way to influence what it does. In
theory I'd create a new widget inheriting from that and use
mark_safe() somehow.

Then I would need to tell the admin form to use it for my
ddstructure field.

BUT see my template effort below



Did you try displaying in the normal admin lists? This was my
understanding of where you wanted to see it and the code
snippets I posted were for that purpose.

If you want to see it as "read only" in the form, but shown as
SVG, perhaps you need a custom model template

(https://docs.djangoproject.com/en/dev/ref/contrib/admin/#templates-which-may-be-overridden-per-app-or-model

)


Again, my feet don't touch bottom. I tried adding some code to
change_form.html like this ...

{% extends "admin/change_form.html" %}

{% block content %}{{ block.super }}
{% if original.ddstructure %}
    {{ original.ddstructure | safe }}
{% else %}
    No 2D structure image 
{% endif %}

{% endblock %}

This kinda worked. It comes after block.super so it displays the
svg image correctly but at the bottom of the page. AND the raw
(or safe) code also displays in the location where I really want
the image.

So close but ...

How do I get it to display inline in the proper place?

Many thanks for hanging in there

Cheers

Mike




Derek


On Thursday, 3 June 2021 at 08:22:57 UTC+2 Mike Dewhirst wrote:

On 3/06/2021 4:00 pm, Derek wrote:
> >
> > E.g.
> >
> > class MyModel():
> >     svg_text = CharField()
>
> in my case it is ...
>
> class Chemical(models.Model):
>     ...
>     ddstructure = models.TextField(
>     null=True,
>     blank=True,
>     verbose_name="2D structure",
>     )
>

The above is unchanged.

# admin
class ChemicalAdmin(admin.ModelAdmin):

    def _ddstructure(self, obj):
        return mark_safe(obj.ddstructure)
    ...
    fieldsets = (
    (
    None,
    {
    "fields": (
    "ddstructure",        # displays svg code
    "_ddstructure",
                    ...
            }
    ),

FYI it works perfectly as a column in the list display - but
I don't
need it there, rather in the page for the chemical.

This is what happens if it is included in the fieldsets
"fields" roster.


FieldError at /admin/chemical/chemical/17/change/

Unknown field(s) (_ddstructure) specified for Chemical.
Check fields/fieldsets/exclude attributes of class
ChemicalAdmin.

Re: SVG widget for the Admin

[Mike Dewhirst]

On 6/06/2021 6:14 pm, Derek wrote:
RE - "I've looked at the AdminTextareaWidget which is probably based 
on the TextInput built-in widget but see no way to influence what it 
does. " and "How do I get it to display inline in the proper place?"


There seems to be similar question on SO:

https://stackoverflow.com/questions/6239966/add-custom-html-between-two-model-fields-in-django-admins-change-form 



The answer with AdminFooWidget() and FooAdminForm() seems closest to 
your use case.


Thanks for that. Unfortunately the answer at that link is ten years old 
and I think Django Admin must have moved on since then. I'm still trying 
to debug an inexplicable KeyError but I think I understand the approach.


I'll keep trying

Cheers

mike




On Sun, 6 Jun 2021 at 09:56, Mike Dewhirst > wrote:


On 4/06/2021 5:15 pm, Derek wrote:

Hi Mike

The SVG is not going to display as SVG in a *form* - for that
you'd need a widget, or perhaps just let users edit the text.


OK - I'm outta my depth here. I've looked at the
AdminTextareaWidget which is probably based on the TextInput
built-in widget but see no way to influence what it does. In
theory I'd create a new widget inheriting from that and use
mark_safe() somehow.

Then I would need to tell the admin form to use it for my
ddstructure field.

BUT see my template effort below



Did you try displaying in the normal admin lists? This was my
understanding of where you wanted to see it and the code snippets
I posted were for that purpose.

If you want to see it as "read only" in the form, but shown as
SVG, perhaps you need a custom model template

(https://docs.djangoproject.com/en/dev/ref/contrib/admin/#templates-which-may-be-overridden-per-app-or-model

)


Again, my feet don't touch bottom. I tried adding some code to
change_form.html like this ...

{% extends "admin/change_form.html" %}

{% block content %}{{ block.super }}
{% if original.ddstructure %}
    {{ original.ddstructure | safe }}
{% else %}
    No 2D structure image 
{% endif %}

{% endblock %}

This kinda worked. It comes after block.super so it displays the
svg image correctly but at the bottom of the page. AND the raw (or
safe) code also displays in the location where I really want the
image.

So close but ...

How do I get it to display inline in the proper place?

Many thanks for hanging in there

Cheers

Mike




Derek


On Thursday, 3 June 2021 at 08:22:57 UTC+2 Mike Dewhirst wrote:

On 3/06/2021 4:00 pm, Derek wrote:
> >
> > E.g.
> >
> > class MyModel():
> >     svg_text = CharField()
>
> in my case it is ...
>
> class Chemical(models.Model):
>     ...
>     ddstructure = models.TextField(
>     null=True,
>     blank=True,
>     verbose_name="2D structure",
>     )
>

The above is unchanged.

# admin
class ChemicalAdmin(admin.ModelAdmin):

    def _ddstructure(self, obj):
        return mark_safe(obj.ddstructure)
    ...
    fieldsets = (
    (
    None,
    {
    "fields": (
    "ddstructure",        # displays svg code
    "_ddstructure",
                    ...
            }
    ),

FYI it works perfectly as a column in the list display - but
I don't
need it there, rather in the page for the chemical.

This is what happens if it is included in the fieldsets
"fields" roster.


FieldError at /admin/chemical/chemical/17/change/

Unknown field(s) (_ddstructure) specified for Chemical. Check
fields/fieldsets/exclude attributes of class ChemicalAdmin.

Request Method: GET
Request URL:
http://localhost:8088/admin/chemical/chemical/17/change/

Django Version: 3.2.3
Exception Type: FieldError
Exception Value:

Unknown field(s) (_ddstructure) specified for Chemical. Check
fields/fieldsets/exclude attributes of class ChemicalAdmin.

Exception Location:

D:\Users\mike\envs\xxai\lib\site-packages\django\contrib\admin\options.py,

line 712, in get_form
Python Executable: D:\Users\mike\envs\xxai\Scripts\python.exe
Python Version: 3.8.3


Cheers

Mike


> >
> >     def _the_svg(self):
> >         

Re: SVG widget for the Admin

[Mike Dewhirst]

On 4/06/2021 5:15 pm, Derek wrote:

Hi Mike

The SVG is not going to display as SVG in a *form* - for that you'd 
need a widget, or perhaps just let users edit the text.


OK - I'm outta my depth here. I've looked at the AdminTextareaWidget 
which is probably based on the TextInput built-in widget but see no way 
to influence what it does. In theory I'd create a new widget inheriting 
from that and use mark_safe() somehow.


Then I would need to tell the admin form to use it for my ddstructure field.

BUT see my template effort below



Did you try displaying in the normal admin lists? This was my 
understanding of where you wanted to see it and the code snippets I 
posted were for that purpose.


If you want to see it as "read only" in the form, but shown as SVG, 
perhaps you need a custom model template 
(https://docs.djangoproject.com/en/dev/ref/contrib/admin/#templates-which-may-be-overridden-per-app-or-model)


Again, my feet don't touch bottom. I tried adding some code to 
change_form.html like this ...


{% extends "admin/change_form.html" %}

{% block content %}{{ block.super }}
{% if original.ddstructure %}
    {{ original.ddstructure | safe }}
{% else %}
    No 2D structure image 
{% endif %}

{% endblock %}

This kinda worked. It comes after block.super so it displays the svg 
image correctly but at the bottom of the page. AND the raw (or safe) 
code also displays in the location where I really want the image.


So close but ...

How do I get it to display inline in the proper place?

Many thanks for hanging in there

Cheers

Mike




Derek


On Thursday, 3 June 2021 at 08:22:57 UTC+2 Mike Dewhirst wrote:

On 3/06/2021 4:00 pm, Derek wrote:
> >
> > E.g.
> >
> > class MyModel():
> >     svg_text = CharField()
>
> in my case it is ...
>
> class Chemical(models.Model):
>     ...
>     ddstructure = models.TextField(
>     null=True,
>     blank=True,
>     verbose_name="2D structure",
>     )
>

The above is unchanged.

# admin
class ChemicalAdmin(admin.ModelAdmin):

    def _ddstructure(self, obj):
        return mark_safe(obj.ddstructure)
    ...
    fieldsets = (
    (
    None,
    {
    "fields": (
    "ddstructure",        # displays svg code
    "_ddstructure",
                    ...
            }
    ),

FYI it works perfectly as a column in the list display - but I don't
need it there, rather in the page for the chemical.

This is what happens if it is included in the fieldsets "fields"
roster.


FieldError at /admin/chemical/chemical/17/change/

Unknown field(s) (_ddstructure) specified for Chemical. Check
fields/fieldsets/exclude attributes of class ChemicalAdmin.

Request Method: GET
Request URL:
http://localhost:8088/admin/chemical/chemical/17/change/

Django Version: 3.2.3
Exception Type: FieldError
Exception Value:

Unknown field(s) (_ddstructure) specified for Chemical. Check
fields/fieldsets/exclude attributes of class ChemicalAdmin.

Exception Location:
D:\Users\mike\envs\xxai\lib\site-packages\django\contrib\admin\options.py,

line 712, in get_form
Python Executable: D:\Users\mike\envs\xxai\Scripts\python.exe
Python Version: 3.8.3


Cheers

Mike


> >
> >     def _the_svg(self):
> >         return """%s""" %
> > self.svg_text
> >         _the_svg.allow_tags = True
>


-- 
Signed email is an absolute defence against phishing. This email has

been signed with my private key. If you import my public key you can
automatically decrypt my signature and be sure it came from me. Just
ask and I'll send it to you. Your email software can handle signing.

--
You received this message because you are subscribed to the Google 
Groups "Django users" group.
To unsubscribe from this group and stop receiving emails from it, send 
an email to django-users+unsubscr...@googlegroups.com 
.
To view this discussion on the web visit 
https://groups.google.com/d/msgid/django-users/4862b67b-e5e9-40a3-b3aa-1666f4739703n%40googlegroups.com 
.



--
Signed email is an absolute defence against phishing. This email has
been signed with my private key. If you import my public key you can
automatically decrypt my signature and be sure it came from me. Just
ask and I'll send it to you. Your email software can handle signing.


--
You received this message because you are subscribed to the Google Groups "Django 
users" group.
To unsubscribe from this group and stop receiving emails from it, send an email 
to 

Re: SVG widget for the Admin

[Mike Dewhirst]

On 4/06/2021 5:15 pm, Derek wrote:

Hi Mike

The SVG is not going to display as SVG in a *form* - for that you'd 
need a widget, or perhaps just let users edit the text.


It will always be readonly.  Forever.



Did you try displaying in the normal admin lists? This was my 
understanding of where you wanted to see it and the code snippets I 
posted were for that purpose.


I did try that and it did show the svg image - but that isn't where I 
want it. It needs to be in the Admin displayed form.




If you want to see it as "read only" in the form, but shown as SVG,


but shown as an image

perhaps you need a custom model template 
(https://docs.djangoproject.com/en/dev/ref/contrib/admin/#templates-which-may-be-overridden-per-app-or-model)


I think that's where I need to go. Might be easier than a widget - 
unless someone has built one already?


It would be quite handy to use mark_safe() somewhere ...

Thanks

Mike



Derek


On Thursday, 3 June 2021 at 08:22:57 UTC+2 Mike Dewhirst wrote:

On 3/06/2021 4:00 pm, Derek wrote:
> >
> > E.g.
> >
> > class MyModel():
> >     svg_text = CharField()
>
> in my case it is ...
>
> class Chemical(models.Model):
>     ...
>     ddstructure = models.TextField(
>     null=True,
>     blank=True,
>     verbose_name="2D structure",
>     )
>

The above is unchanged.

# admin
class ChemicalAdmin(admin.ModelAdmin):

    def _ddstructure(self, obj):
        return mark_safe(obj.ddstructure)
    ...
    fieldsets = (
    (
    None,
    {
    "fields": (
    "ddstructure",        # displays svg code
    "_ddstructure",
                    ...
            }
    ),

FYI it works perfectly as a column in the list display - but I don't
need it there, rather in the page for the chemical.

This is what happens if it is included in the fieldsets "fields"
roster.


FieldError at /admin/chemical/chemical/17/change/

Unknown field(s) (_ddstructure) specified for Chemical. Check
fields/fieldsets/exclude attributes of class ChemicalAdmin.

Request Method: GET
Request URL:
http://localhost:8088/admin/chemical/chemical/17/change/

Django Version: 3.2.3
Exception Type: FieldError
Exception Value:

Unknown field(s) (_ddstructure) specified for Chemical. Check
fields/fieldsets/exclude attributes of class ChemicalAdmin.

Exception Location:
D:\Users\mike\envs\xxai\lib\site-packages\django\contrib\admin\options.py,

line 712, in get_form
Python Executable: D:\Users\mike\envs\xxai\Scripts\python.exe
Python Version: 3.8.3


Cheers

Mike


> >
> >     def _the_svg(self):
> >         return """%s""" %
> > self.svg_text
> >         _the_svg.allow_tags = True
>


-- 
Signed email is an absolute defence against phishing. This email has

been signed with my private key. If you import my public key you can
automatically decrypt my signature and be sure it came from me. Just
ask and I'll send it to you. Your email software can handle signing.

--
You received this message because you are subscribed to the Google 
Groups "Django users" group.
To unsubscribe from this group and stop receiving emails from it, send 
an email to django-users+unsubscr...@googlegroups.com 
.
To view this discussion on the web visit 
https://groups.google.com/d/msgid/django-users/4862b67b-e5e9-40a3-b3aa-1666f4739703n%40googlegroups.com 
.



--
Signed email is an absolute defence against phishing. This email has
been signed with my private key. If you import my public key you can
automatically decrypt my signature and be sure it came from me. Just
ask and I'll send it to you. Your email software can handle signing.


--
You received this message because you are subscribed to the Google Groups "Django 
users" group.
To unsubscribe from this group and stop receiving emails from it, send an email 
to django-users+unsubscr...@googlegroups.com.
To view this discussion on the web visit 
https://groups.google.com/d/msgid/django-users/ed050bc5--0bba-ef03-eb2a26d71387%40dewhirst.com.au.


OpenPGP_signature
Description: OpenPGP digital signature

Re: SVG widget for the Admin

[Derek]

Hi Mike

The SVG is not going to display as SVG in a *form* - for that you'd need a 
widget, or perhaps just let users edit the text.

Did you try displaying in the normal admin lists? This was my understanding 
of where you wanted to see it and the code snippets I posted were for that 
purpose.

If you want to see it as "read only" in the form, but shown as SVG, perhaps 
you need a custom model template 
(https://docs.djangoproject.com/en/dev/ref/contrib/admin/#templates-which-may-be-overridden-per-app-or-model)

Derek


On Thursday, 3 June 2021 at 08:22:57 UTC+2 Mike Dewhirst wrote:

> On 3/06/2021 4:00 pm, Derek wrote:
> > >
> > > E.g.
> > >
> > > class MyModel():
> > > svg_text = CharField()
> >
> > in my case it is ...
> >
> > class Chemical(models.Model):
> > ...
> > ddstructure = models.TextField(
> > null=True,
> > blank=True,
> > verbose_name="2D structure",
> > )
> >
>
> The above is unchanged.
>
> # admin
> class ChemicalAdmin(admin.ModelAdmin):
>
> def _ddstructure(self, obj):
> return mark_safe(obj.ddstructure)
> ...
> fieldsets = (
> (
> None,
> {
> "fields": (
> "ddstructure",# displays svg code
> "_ddstructure",
> ...
> }
> ),
>
> FYI it works perfectly as a column in the list display - but I don't 
> need it there, rather in the page for the chemical.
>
> This is what happens if it is included in the fieldsets "fields" roster.
>
>
> FieldError at /admin/chemical/chemical/17/change/
>
> Unknown field(s) (_ddstructure) specified for Chemical. Check 
> fields/fieldsets/exclude attributes of class ChemicalAdmin.
>
> Request Method: GET
> Request URL: http://localhost:8088/admin/chemical/chemical/17/change/
> Django Version: 3.2.3
> Exception Type: FieldError
> Exception Value: 
>
> Unknown field(s) (_ddstructure) specified for Chemical. Check 
> fields/fieldsets/exclude attributes of class ChemicalAdmin.
>
> Exception Location: 
> D:\Users\mike\envs\xxai\lib\site-packages\django\contrib\admin\options.py, 
> line 712, in get_form
> Python Executable: D:\Users\mike\envs\xxai\Scripts\python.exe
> Python Version: 3.8.3
>
>
> Cheers
>
> Mike
>
>
> > >
> > > def _the_svg(self):
> > > return """%s""" %
> > > self.svg_text
> > > _the_svg.allow_tags = True
> >
>
>
> -- 
> Signed email is an absolute defence against phishing. This email has
> been signed with my private key. If you import my public key you can
> automatically decrypt my signature and be sure it came from me. Just
> ask and I'll send it to you. Your email software can handle signing.
>
>

-- 
You received this message because you are subscribed to the Google Groups 
"Django users" group.
To unsubscribe from this group and stop receiving emails from it, send an email 
to django-users+unsubscr...@googlegroups.com.
To view this discussion on the web visit 
https://groups.google.com/d/msgid/django-users/4862b67b-e5e9-40a3-b3aa-1666f4739703n%40googlegroups.com.

Re: SVG widget for the Admin

[Mike Dewhirst]

On 3/06/2021 4:00 pm, Derek wrote:

>
> E.g.
>
> class MyModel():
>     svg_text = CharField()

in my case it is ...

class Chemical(models.Model):
    ...
    ddstructure = models.TextField(
    null=True,
    blank=True,
    verbose_name="2D structure",
    )



The above is unchanged.

# admin
class ChemicalAdmin(admin.ModelAdmin):

    def _ddstructure(self, obj):
        return mark_safe(obj.ddstructure)
    ...
    fieldsets = (
    (
    None,
    {
    "fields": (
    "ddstructure",        # displays svg code
    "_ddstructure",
                    ...
            }
    ),

FYI it works perfectly as a column in the list display - but I don't 
need it there, rather in the page for the chemical.


This is what happens if it is included in the fieldsets "fields" roster.


 FieldError at /admin/chemical/chemical/17/change/

Unknown field(s) (_ddstructure) specified for Chemical. Check 
fields/fieldsets/exclude attributes of class ChemicalAdmin.

Request Method: GET
Request URL:http://localhost:8088/admin/chemical/chemical/17/change/
Django Version: 3.2.3
Exception Type: FieldError
Exception Value:

Unknown field(s) (_ddstructure) specified for Chemical. Check 
fields/fieldsets/exclude attributes of class ChemicalAdmin.

Exception Location: 
D:\Users\mike\envs\xxai\lib\site-packages\django\contrib\admin\options.py, 
line 712, in get_form

Python Executable:  D:\Users\mike\envs\xxai\Scripts\python.exe
Python Version: 3.8.3


Cheers

Mike



>
>     def _the_svg(self):
>         return """%s""" %
> self.svg_text
>         _the_svg.allow_tags = True




--
Signed email is an absolute defence against phishing. This email has
been signed with my private key. If you import my public key you can
automatically decrypt my signature and be sure it came from me. Just
ask and I'll send it to you. Your email software can handle signing.

--
You received this message because you are subscribed to the Google Groups "Django 
users" group.
To unsubscribe from this group and stop receiving emails from it, send an email 
to django-users+unsubscr...@googlegroups.com.
To view this discussion on the web visit 
https://groups.google.com/d/msgid/django-users/2f167985-9e2e-fc27-15d1-fc153c6b0077%40dewhirst.com.au.


OpenPGP_signature
Description: OpenPGP digital signature

Re: SVG widget for the Admin

[Derek]

Hi Mike

OK, if you have more specific feedback I will try to respond.

I doubt you need a specific template as the SVG should be displayable by a 
modern browser using Django's built-in options.


On Thursday, 3 June 2021 at 01:10:07 UTC+2 Mike Dewhirst wrote:

> Derek
>
> I pretty much tried what you suggested. I dont have access to my machine 
> atm so that's all I can really say. 
>
> I looked at the link and understand the list customisation because I 
> already use it elsewhere. 
>
> It does look like I'll have to switch in my own template so I can include 
> a safe filter.
>
> Thanks again
>
> Mike
>
>
>
> --
> (Unsigned mail from my phone)
>
>
>
>  Original message 
> From: Derek  
> Date: 2/6/21 23:39 (GMT+10:00) 
> To: Django users  
> Subject: Re: SVG widget for the Admin 
>
> When you say "I tried your suggestion and had no success." what exactly 
> did you try  - i.e. what code did you use and what errors did you get?
>
> WRT "Not sure where this should live for the Admin to call it and display 
> the image." - it lives exactly as I showed it in my example; its a 
> user-defined property for the model in which the SVG text is stored.  You 
> can use it in the admin as you would the normal model fields. 
>
> There is a good example of defining and using your own derived 'field'  
> here:
>
> https://realpython.com/customize-django-admin-python/#modifying-a-change-list-using-list_display
>
> (Please note that to show HTML strings, you need to use the format_html() 
> method. Ignore mt previous reference to "allow_tags" as this is deprecated.)
>
> Derek
>
>
> On Wednesday, 2 June 2021 at 10:05:11 UTC+2 Mike Dewhirst wrote:
>
>> On 1/06/2021 11:44 pm, Derek wrote: 
>> > You haven't defined where in the admin interface you want this image 
>> > to be displayed?  A table? 
>> > 
>> > I have not tried this, but could you not create an additional field on 
>> > your model that returns the HTML-encoding needed to display the SVG? 
>>
>> Derek, thanks for responding. I tried your suggestion and had no success. 
>>
>> Where in the admin? Just among a normal roster of fields. The svg is a 
>> molecular structure and the image needs to appear for example just after 
>> the molecular formula. I collect the actual svg code via a public API on 
>> saving the record. 
>>
>> > 
>> > E.g. 
>> > 
>> > class MyModel(): 
>> > svg_text = CharField() 
>>
>> in my case it is ... 
>>
>> class chemical(models.Model): 
>> ... 
>> ddstructure = models.TextField( 
>> null=True, 
>> blank=True, 
>> verbose_name="2D structure", 
>> ) 
>>
>> > 
>> > def _the_svg(self): 
>> > return """%s""" % 
>> > self.svg_text 
>> > _the_svg.allow_tags = True 
>>
>> Not sure where this should live for the Admin to call it and display the 
>> image. 
>>
>>
>> > I am not sure about editing visually, however - I would expect that 
>> > would require a specialised widget. 
>>
>> It is read-only in all cases. 
>>
>> I was thinking a widget might be needed just for display. The svg code 
>> arrives complete with tags so really all it needs is a mechanism to 
>> persuade the admin it is safe to render as is. 
>>
>> I haven't seen such a (probably insecure) "feature" previously. I've 
>> looked through the docs but haven't found it yet. 
>>
>> Thanks again 
>>
>> Mike 
>>
>>
>> > 
>> > HTH 
>> > Derek 
>> > 
>> > 
>> > On Tuesday, 1 June 2021 at 03:28:59 UTC+2 Mike Dewhirst wrote: 
>> > 
>> > I collect the svg source for an image from a public API and store 
>> > it in 
>> > a models.TextField. I have no difficulty displaying it in a normal 
>> > view 
>> > and my own template. Nothing special, it just emerges. I don't 
>> > even need 
>> > a 'safe' filter. 
>> > 
>> > However, I really want to display such images in the Admin. At this 
>> > stage all it displays is the svg source. 
>> > 
>> > What is the correct way to make the image appear in the Admin? 
>> > 
>> > Do I need a special field inheriting from TextField? Do I need a 
>> > special 
>> > widget? Is there a way to mark admin field values as safe? 
>> > 
>> > Thanks for any hints 
&

Re: SVG widget for the Admin

[Mike Dewhirst]

DerekI pretty much tried what you suggested. I dont have access to my machine 
atm so that's all I can really say. I looked at the link and understand the 
list customisation because I already use it elsewhere. It does look like I'll 
have to switch in my own template so I can include a safe filter.Thanks 
againMike--(Unsigned mail from my phone)
 Original message From: Derek  Date: 
2/6/21  23:39  (GMT+10:00) To: Django users  
Subject: Re: SVG widget for the Admin When you say "I tried your suggestion and 
had no success." what exactly did you try  - i.e. what code did you use and 
what errors did you get?WRT "Not sure where this should live for the Admin to 
call it and display the image." - it lives exactly as I showed it in my 
example; its a user-defined property for the model in which the SVG text is 
stored.  You can use it in the admin as you would the normal model fields. 
There is a good example of defining and using your own derived 'field'  
here:https://realpython.com/customize-django-admin-python/#modifying-a-change-list-using-list_display(Please
 note that to show HTML strings, you need to use the format_html() method. 
Ignore mt previous reference to "allow_tags" as this is deprecated.)DerekOn 
Wednesday, 2 June 2021 at 10:05:11 UTC+2 Mike Dewhirst wrote:On 1/06/2021 11:44 
pm, Derek wrote:
> You haven't defined where in the admin interface you want this image 
> to be displayed?  A table?
>
> I have not tried this, but could you not create an additional field on 
> your model that returns the HTML-encoding needed to display the SVG?

Derek, thanks for responding. I tried your suggestion and had no success.

Where in the admin? Just among a normal roster of fields. The svg is a 
molecular structure and the image needs to appear for example just after 
the molecular formula. I collect the actual svg code via a public API on 
saving the record.

>
> E.g.
>
> class MyModel():
>     svg_text = CharField()

in my case it is ...

class chemical(models.Model):
     ...
     ddstructure = models.TextField(
     null=True,
     blank=True,
     verbose_name="2D structure",
     )

>
>     def _the_svg(self):
>         return """%s""" % 
> self.svg_text
>         _the_svg.allow_tags = True

Not sure where this should live for the Admin to call it and display the 
image.


> I am not sure about editing visually, however - I would expect that 
> would require a specialised widget.

It is read-only in all cases.

I was thinking a widget might be needed just for display. The svg code 
arrives complete with tags so really all it needs is a mechanism to 
persuade the admin it is safe to render as is.

I haven't seen such a (probably insecure) "feature" previously. I've 
looked through the docs but haven't found it yet.

Thanks again

Mike


>
> HTH
> Derek
>
>
> On Tuesday, 1 June 2021 at 03:28:59 UTC+2 Mike Dewhirst wrote:
>
> I collect the svg source for an image from a public API and store
> it in
> a models.TextField. I have no difficulty displaying it in a normal
> view
> and my own template. Nothing special, it just emerges. I don't
> even need
> a 'safe' filter.
>
> However, I really want to display such images in the Admin. At this
> stage all it displays is the svg source.
>
> What is the correct way to make the image appear in the Admin?
>
> Do I need a special field inheriting from TextField? Do I need a
> special
> widget? Is there a way to mark admin field values as safe?
>
> Thanks for any hints
>
> Mike
>
> -- 
> Signed email is an absolute defence against phishing. This email has
> been signed with my private key. If you import my public key you can
> automatically decrypt my signature and be sure it came from me. Just
> ask and I'll send it to you. Your email software can handle signing.
>
>
> -- 
> You received this message because you are subscribed to the Google 
> Groups "Django users" group.
> To unsubscribe from this group and stop receiving emails from it, send 
> an email to django-users...@googlegroups.com 
> <mailto:django-users...@googlegroups.com>.
> To view this discussion on the web visit 
> https://groups.google.com/d/msgid/django-users/520bf296-ec68-48ad-8fe2-f106823efac2n%40googlegroups.com
>  
> <https://groups.google.com/d/msgid/django-users/520bf296-ec68-48ad-8fe2-f106823efac2n%40googlegroups.com?utm_medium=email_source=footer>.


-- 
Signed email is an absolute defence against phishing. This email has
been signed with my private key. If you import my public key you can
automatically decrypt my signature and be sure it came from me. Just
ask and I'll send it to you. Your emai

Re: SVG widget for the Admin

[Derek]

When you say "I tried your suggestion and had no success." what exactly did 
you try  - i.e. what code did you use and what errors did you get?

WRT "Not sure where this should live for the Admin to call it and display 
the image." - it lives exactly as I showed it in my example; its a 
user-defined property for the model in which the SVG text is stored.  You 
can use it in the admin as you would the normal model fields. 

There is a good example of defining and using your own derived 'field'  
here:
https://realpython.com/customize-django-admin-python/#modifying-a-change-list-using-list_display

(Please note that to show HTML strings, you need to use the format_html() 
method. Ignore mt previous reference to "allow_tags" as this is deprecated.)

Derek


On Wednesday, 2 June 2021 at 10:05:11 UTC+2 Mike Dewhirst wrote:

> On 1/06/2021 11:44 pm, Derek wrote:
> > You haven't defined where in the admin interface you want this image 
> > to be displayed?  A table?
> >
> > I have not tried this, but could you not create an additional field on 
> > your model that returns the HTML-encoding needed to display the SVG?
>
> Derek, thanks for responding. I tried your suggestion and had no success.
>
> Where in the admin? Just among a normal roster of fields. The svg is a 
> molecular structure and the image needs to appear for example just after 
> the molecular formula. I collect the actual svg code via a public API on 
> saving the record.
>
> >
> > E.g.
> >
> > class MyModel():
> > svg_text = CharField()
>
> in my case it is ...
>
> class chemical(models.Model):
> ...
> ddstructure = models.TextField(
> null=True,
> blank=True,
> verbose_name="2D structure",
> )
>
> >
> > def _the_svg(self):
> > return """%s""" % 
> > self.svg_text
> > _the_svg.allow_tags = True
>
> Not sure where this should live for the Admin to call it and display the 
> image.
>
>
> > I am not sure about editing visually, however - I would expect that 
> > would require a specialised widget.
>
> It is read-only in all cases.
>
> I was thinking a widget might be needed just for display. The svg code 
> arrives complete with tags so really all it needs is a mechanism to 
> persuade the admin it is safe to render as is.
>
> I haven't seen such a (probably insecure) "feature" previously. I've 
> looked through the docs but haven't found it yet.
>
> Thanks again
>
> Mike
>
>
> >
> > HTH
> > Derek
> >
> >
> > On Tuesday, 1 June 2021 at 03:28:59 UTC+2 Mike Dewhirst wrote:
> >
> > I collect the svg source for an image from a public API and store
> > it in
> > a models.TextField. I have no difficulty displaying it in a normal
> > view
> > and my own template. Nothing special, it just emerges. I don't
> > even need
> > a 'safe' filter.
> >
> > However, I really want to display such images in the Admin. At this
> > stage all it displays is the svg source.
> >
> > What is the correct way to make the image appear in the Admin?
> >
> > Do I need a special field inheriting from TextField? Do I need a
> > special
> > widget? Is there a way to mark admin field values as safe?
> >
> > Thanks for any hints
> >
> > Mike
> >
> > -- 
> > Signed email is an absolute defence against phishing. This email has
> > been signed with my private key. If you import my public key you can
> > automatically decrypt my signature and be sure it came from me. Just
> > ask and I'll send it to you. Your email software can handle signing.
> >
> >
> > -- 
> > You received this message because you are subscribed to the Google 
> > Groups "Django users" group.
> > To unsubscribe from this group and stop receiving emails from it, send 
> > an email to django-users...@googlegroups.com 
> > .
> > To view this discussion on the web visit 
> > 
> https://groups.google.com/d/msgid/django-users/520bf296-ec68-48ad-8fe2-f106823efac2n%40googlegroups.com
>  
> > <
> https://groups.google.com/d/msgid/django-users/520bf296-ec68-48ad-8fe2-f106823efac2n%40googlegroups.com?utm_medium=email_source=footer
> >.
>
>
> -- 
> Signed email is an absolute defence against phishing. This email has
> been signed with my private key. If you import my public key you can
> automatically decrypt my signature and be sure it came from me. Just
> ask and I'll send it to you. Your email software can handle signing.
>
>
>

-- 
You received this message because you are subscribed to the Google Groups 
"Django users" group.
To unsubscribe from this group and stop receiving emails from it, send an email 
to django-users+unsubscr...@googlegroups.com.
To view this discussion on the web visit 
https://groups.google.com/d/msgid/django-users/518a9b56-de5a-46b8-8578-89bd99f20f4fn%40googlegroups.com.

Re: SVG widget for the Admin

[Mike Dewhirst]

On 1/06/2021 11:44 pm, Derek wrote:
You haven't defined where in the admin interface you want this image 
to be displayed?  A table?


I have not tried this, but could you not create an additional field on 
your model that returns the HTML-encoding needed to display the SVG?


Derek, thanks for responding. I tried your suggestion and had no success.

Where in the admin? Just among a normal roster of fields. The svg is a 
molecular structure and the image needs to appear for example just after 
the molecular formula. I collect the actual svg code via a public API on 
saving the record.




E.g.

class MyModel():
    svg_text = CharField()


in my case it is ...

class chemical(models.Model):
    ...
    ddstructure = models.TextField(
    null=True,
    blank=True,
    verbose_name="2D structure",
    )



    def _the_svg(self):
        return """%s""" % 
self.svg_text

        _the_svg.allow_tags = True


Not sure where this should live for the Admin to call it and display the 
image.



I am not sure about editing visually, however - I would expect that 
would require a specialised widget.


It is read-only in all cases.

I was thinking a widget might be needed just for display. The svg code 
arrives complete with tags so really all it needs is a mechanism to 
persuade the admin it is safe to render as is.


I haven't seen such a (probably insecure) "feature" previously. I've 
looked through the docs but haven't found it yet.


Thanks again

Mike




HTH
Derek


On Tuesday, 1 June 2021 at 03:28:59 UTC+2 Mike Dewhirst wrote:

I collect the svg source for an image from a public API and store
it in
a models.TextField. I have no difficulty displaying it in a normal
view
and my own template. Nothing special, it just emerges. I don't
even need
a 'safe' filter.

However, I really want to display such images in the Admin. At this
stage all it displays is the svg source.

What is the correct way to make the image appear in the Admin?

Do I need a special field inheriting from TextField? Do I need a
special
widget? Is there a way to mark admin field values as safe?

Thanks for any hints

Mike

-- 
Signed email is an absolute defence against phishing. This email has

been signed with my private key. If you import my public key you can
automatically decrypt my signature and be sure it came from me. Just
ask and I'll send it to you. Your email software can handle signing.


--
You received this message because you are subscribed to the Google 
Groups "Django users" group.
To unsubscribe from this group and stop receiving emails from it, send 
an email to django-users+unsubscr...@googlegroups.com 
.
To view this discussion on the web visit 
https://groups.google.com/d/msgid/django-users/520bf296-ec68-48ad-8fe2-f106823efac2n%40googlegroups.com 
.



--
Signed email is an absolute defence against phishing. This email has
been signed with my private key. If you import my public key you can
automatically decrypt my signature and be sure it came from me. Just
ask and I'll send it to you. Your email software can handle signing.


--
You received this message because you are subscribed to the Google Groups "Django 
users" group.
To unsubscribe from this group and stop receiving emails from it, send an email 
to django-users+unsubscr...@googlegroups.com.
To view this discussion on the web visit 
https://groups.google.com/d/msgid/django-users/4fc10ce8-eccf-8bab-67fb-8dfb93a5b6e2%40dewhirst.com.au.


OpenPGP_signature
Description: OpenPGP digital signature

Re: SVG widget for the Admin

[Derek]

You haven't defined where in the admin interface you want this image to be 
displayed?  A table?

I have not tried this, but could you not create an additional field on your 
model that returns the HTML-encoding needed to display the SVG?

E.g. 

class MyModel():
svg_text = CharField()

def _the_svg(self):
return """%s""" % self.svg_text
_the_svg.allow_tags = True

I am not sure about editing visually, however - I would expect that would 
require a specialised widget.

HTH
Derek


On Tuesday, 1 June 2021 at 03:28:59 UTC+2 Mike Dewhirst wrote:

> I collect the svg source for an image from a public API and store it in 
> a models.TextField. I have no difficulty displaying it in a normal view 
> and my own template. Nothing special, it just emerges. I don't even need 
> a 'safe' filter.
>
> However, I really want to display such images in the Admin. At this 
> stage all it displays is the svg source.
>
> What is the correct way to make the image appear in the Admin?
>
> Do I need a special field inheriting from TextField? Do I need a special 
> widget? Is there a way to mark admin field values as safe?
>
> Thanks for any hints
>
> Mike
>
> -- 
> Signed email is an absolute defence against phishing. This email has
> been signed with my private key. If you import my public key you can
> automatically decrypt my signature and be sure it came from me. Just
> ask and I'll send it to you. Your email software can handle signing.
>
>
>

-- 
You received this message because you are subscribed to the Google Groups 
"Django users" group.
To unsubscribe from this group and stop receiving emails from it, send an email 
to django-users+unsubscr...@googlegroups.com.
To view this discussion on the web visit 
https://groups.google.com/d/msgid/django-users/520bf296-ec68-48ad-8fe2-f106823efac2n%40googlegroups.com.

SVG widget for the Admin

[Mike Dewhirst]

I collect the svg source for an image from a public API and store it in 
a models.TextField. I have no difficulty displaying it in a normal view 
and my own template. Nothing special, it just emerges. I don't even need 
a 'safe' filter.


However, I really want to display such images in the Admin. At this 
stage all it displays is the svg source.


What is the correct way to make the image appear in the Admin?

Do I need a special field inheriting from TextField? Do I need a special 
widget? Is there a way to mark admin field values as safe?


Thanks for any hints

Mike

--
Signed email is an absolute defence against phishing. This email has
been signed with my private key. If you import my public key you can
automatically decrypt my signature and be sure it came from me. Just
ask and I'll send it to you. Your email software can handle signing.


--
You received this message because you are subscribed to the Google Groups "Django 
users" group.
To unsubscribe from this group and stop receiving emails from it, send an email 
to django-users+unsubscr...@googlegroups.com.
To view this discussion on the web visit 
https://groups.google.com/d/msgid/django-users/b8ec5d1f-950f-c3cf-2490-e52e75035660%40dewhirst.com.au.


OpenPGP_signature
Description: OpenPGP digital signature