Re: Checkboxes for a list of items like in Django admin interface

[DrBloodmoney]

On Wed, Jan 4, 2012 at 5:33 AM, Martin Tiršel  wrote:
> Hello,
>
> I have a list of items (from a model) I want to display with checkboxes (for
> deleting multiple objects at once). The same behaviour like in django admin
> (change list). I can do such thing in templates:
>
> {% for item in item_list %}
> 
> 
> {{ item }}
> 
> {% endfor %}
>
> and in a view loop through somename list I get from POST and delete items.
> Is there a better Django way I should do it or this approach I wrote is
> correct? Is there a way I could use Django forms for processing the POST
> data and delete items in a form's method (so I can use it from multiple
> views)?
>

I do it in a form, because I like to keep all of the heavy logic out
of views and keep it in the models or the forms. Here is a relatively
complete example form from my codebase:

class DivisionRemovalForm(forms.Form):
class MultipleDivisionField(forms.ModelMultipleChoiceField):
def label_from_instance(self, obj):
url = reverse('organizer_division_view', kwargs={'div_pk': obj.pk})
label = '%s' % (url, obj.__unicode__())
return mark_safe(label)

divisions = MultipleDivisionField(queryset=[],
widget=forms.CheckboxSelectMultiple())

def __init__(self, competition, *args, **kwargs):
self.competition = competition
super(DivisionRemovalForm, self).__init__(*args, **kwargs)
self.fields['divisions'].queryset = self.competition.divisions.all()

def save(self):
for div in self.cleaned_data['divisions']:
units = div.units.all()
if units:
for unit in units:
unit.in_division = False
unit.save()
divisions = self.cleaned_data['divisions']
divisions.delete()

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Re: Checkboxes for a list of items like in Django admin interface

[Thorsten Sanders]

I missunderstood due "and in a view loop through somename list" thought 
you mean you delete them 1 by 1 :P


And the orm itself tries to convert the value to an int and throws an 
ValueError if it fails, so find it a bit double to check myself and let 
the orm do it again.


On 04.01.2012 13:43, Martin Tiršel wrote:
Yes, this is the technique I described but I was asking if there is a 
Django way to do this.


You can't forgot to sanitize the input in this case:

id_list = request.GET.getlist('id_notification_list')
id_list = [int(i) for i in id_list if i.isdigit()]
notifications = Notification.objects.filter(
id__in=id_list,
)

Martin

On Wed, 04 Jan 2012 12:11:11 +0100, Thorsten Sanders 
 wrote:



I do it this way:



and in the view:

todel = request.POST.getlist('todelete')
ItemWatchList.objects.filter(user=request.user,id__in=todel).delete()


On 04.01.2012 11:33, Martin Tiršel wrote:

Hello,

I have a list of items (from a model) I want to display with 
checkboxes (for deleting multiple objects at once). The same 
behaviour like in django admin (change list). I can do such thing in 
templates:


{% for item in item_list %}


{{ item }}

{% endfor %}

and in a view loop through somename list I get from POST and delete 
items. Is there a better Django way I should do it or this approach 
I wrote is correct? Is there a way I could use Django forms for 
processing the POST data and delete items in a form's method (so I 
can use it from multiple views)?


Thanks,
Martin





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Re: Checkboxes for a list of items like in Django admin interface

[Martin Tiršel]

Yes, this is the technique I described but I was asking if there is a  
Django way to do this.


You can't forgot to sanitize the input in this case:

id_list = request.GET.getlist('id_notification_list')
id_list = [int(i) for i in id_list if i.isdigit()]
notifications = Notification.objects.filter(
id__in=id_list,
)

Martin

On Wed, 04 Jan 2012 12:11:11 +0100, Thorsten Sanders  
 wrote:



I do it this way:



and in the view:

todel = request.POST.getlist('todelete')
ItemWatchList.objects.filter(user=request.user,id__in=todel).delete()


On 04.01.2012 11:33, Martin Tiršel wrote:

Hello,

I have a list of items (from a model) I want to display with checkboxes  
(for deleting multiple objects at once). The same behaviour like in  
django admin (change list). I can do such thing in templates:


{% for item in item_list %}


{{ item }}

{% endfor %}

and in a view loop through somename list I get from POST and delete  
items. Is there a better Django way I should do it or this approach I  
wrote is correct? Is there a way I could use Django forms for  
processing the POST data and delete items in a form's method (so I can  
use it from multiple views)?


Thanks,
Martin



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Re: Checkboxes for a list of items like in Django admin interface

[Thorsten Sanders]

I do it this way:



and in the view:

todel = request.POST.getlist('todelete')
ItemWatchList.objects.filter(user=request.user,id__in=todel).delete()


On 04.01.2012 11:33, Martin Tiršel wrote:

Hello,

I have a list of items (from a model) I want to display with 
checkboxes (for deleting multiple objects at once). The same behaviour 
like in django admin (change list). I can do such thing in templates:


{% for item in item_list %}


{{ item }}

{% endfor %}

and in a view loop through somename list I get from POST and delete 
items. Is there a better Django way I should do it or this approach I 
wrote is correct? Is there a way I could use Django forms for 
processing the POST data and delete items in a form's method (so I can 
use it from multiple views)?


Thanks,
Martin



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Re: Checkboxes for a list of items like in Django admin interface

[kenneth gonsalves]

On Wed, 2012-01-04 at 11:33 +0100, Martin Tiršel wrote:
> and in a view loop through somename list I get from POST and delete
> items.  
> Is there a better Django way I should do it or this approach I wrote
> is  
> correct? 

I have been doing the same - would love to know if there was a better
way.
-- 
regards
Kenneth Gonsalves

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