Re : Need help in django database related

[Avi shah]

I want to build an platform where admin can add events and I want end users
to register for that event , so how do I save the data/registration of the
user for that particular event , how can i create dynamic tables like 1
table for 1 event or is there some other logic behind it?

Thanks in advance

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Re: Child data table in Django

[Eugene TUYIZERE]

Dear Sebstian,

Thank you for your email. Frankly speaking I do not have the code for that
kind of table. I used to use the usual datatable but now I want to
implement the one with child row as the image I attached previously.

Regards,

On Wed, 13 Oct 2021 at 15:30, Sebastian Jung 
wrote:

> Hello eugene,
>
> You have implement also jquery >= 3.5.1 and datatablea.min.js
>
> Please show us your html code and javascript code that open row when you
> click on this item...
>
> Regards
>
> Eugene TUYIZERE  schrieb am Mi., 13. Okt. 2021,
> 14:05:
>
>> Dear All,
>>
>> Kindly assist me to have a tutorial or code to make this kind of table in
>> django. I failed to do this from the datatable .net tutorial.
>> [image: image.png]
>>
>> regards,
>>
>> --
>> * Eugene*
>>
>> --
>> 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.
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>> 
>> .
>>
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> 
> .
>


-- 
*TUYIZERE Eugene*



*Msc Degree in Mathematical Science*

*African Institute for Mathematical Sciences (AIMS Cameroon)Crystal
Garden-Lime, Cameroon*

Bsc in Computer Science

*UR-Nyagatare Campus*

Email: eugene.tuyiz...@aims-cameroon.org
   eugenetuyiz...@gmail.com

Tel: (+250) 7 88 26 33 38, (+250) 7 22 26 33 38

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Re: Child data table in Django

[Sebastian Jung]

Hello eugene,

You have implement also jquery >= 3.5.1 and datatablea.min.js

Please show us your html code and javascript code that open row when you
click on this item...

Regards

Eugene TUYIZERE  schrieb am Mi., 13. Okt. 2021,
14:05:

> Dear All,
>
> Kindly assist me to have a tutorial or code to make this kind of table in
> django. I failed to do this from the datatable .net tutorial.
> [image: image.png]
>
> regards,
>
> --
> * Eugene*
>
> --
> 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
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> 
> .
>

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Re: Child data table in Django

[Eugene TUYIZERE]

I want to make the same as this below but using django. That is what I
want. The data are in one table but display shows child table

https://datatables.net/examples/server_side/row_details.html


any one help please

On Wed, 13 Oct 2021 at 14:28, Ammar Mohammed  wrote:

> Hello Dear
>
> You can use djangos prefetch_related in the docs :
>
> prefetch_related()¶
> 
> prefetch_related(**lookups*)¶
> 
>
> Returns a QuerySet that will automatically retrieve, in a single batch,
> related objects for each of the specified lookups.
>
> This has a similar purpose to select_related, in that both are designed
> to stop the deluge of database queries that is caused by accessing related
> objects, but the strategy is quite different.
>
> select_related works by creating an SQL join and including the fields of
> the related object in the SELECT statement. For this reason,
> select_related gets the related objects in the same database query.
> However, to avoid the much larger result set that would result from joining
> across a ‘many’ relationship, select_related is limited to single-valued
> relationships - foreign key and one-to-one.
>
> prefetch_related, on the other hand, does a separate lookup for each
> relationship, and does the ‘joining’ in Python. This allows it to prefetch
> many-to-many and many-to-one objects, which cannot be done using
> select_related, in addition to the foreign key and one-to-one
> relationships that are supported by select_related. It also supports
> prefetching of GenericRelation
> 
>  and GenericForeignKey
> ,
> however, it must be restricted to a homogeneous set of results. For
> example, prefetching objects referenced by a GenericForeignKey is only
> supported if the query is restricted to one ContentType.
>
> For example, suppose you have these models:
>
> from django.db import models
> class Topping(models.Model):
> name = models.CharField(max_length=30)
> class Pizza(models.Model):
> name = models.CharField(max_length=50)
> toppings = models.ManyToManyField(Topping)
>
> def __str__(self):  # __unicode__ on Python 2
> return "%s (%s)" % (
> self.name,
> ", ".join(topping.name for topping in self.toppings.all()),
> )
>
> and run:
>
> >>> Pizza.objects.all()
>
> Url : https://docs.djangoproject.com/en/1.10/ref/models/querysets/
>
>
> On Wed, 13 Oct 2021, 2:06 PM Eugene TUYIZERE, 
> wrote:
>
>> Dear All,
>>
>> Kindly assist me to have a tutorial or code to make this kind of table in
>> django. I failed to do this from the datatable .net tutorial.
>> [image: image.png]
>>
>> regards,
>>
>> --
>> * Eugene*
>>
>> --
>> 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/CABxpZHuY_zoSvcwQL79UPts6g%3DmJRD%3DO_B%2Bc5%3DvinOtPKNLFLw%40mail.gmail.com
>> 
>> .
>>
> --
> 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.
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> 
> .
>


-- 
*TUYIZERE Eugene*



*Msc Degree in Mathematical Science*

*African Institute for Mathematical Sciences (AIMS Cameroon)Crystal
Garden-Lime, Cameroon*

Bsc in Computer Science

*UR-Nyagatare Campus*

Email: eugene.tuyiz...@aims-cameroon.org
   eugenetuyiz...@gmail.com

Tel: (+250) 7 88 26 33 38, (+250) 7 22 26 33 38

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Re: Child data table in Django

[Ammar Mohammed]

Hello Dear

You can use djangos prefetch_related in the docs :

prefetch_related()¶

prefetch_related(**lookups*)¶


Returns a QuerySet that will automatically retrieve, in a single batch,
related objects for each of the specified lookups.

This has a similar purpose to select_related, in that both are designed to
stop the deluge of database queries that is caused by accessing related
objects, but the strategy is quite different.

select_related works by creating an SQL join and including the fields of
the related object in the SELECT statement. For this reason,
select_related gets
the related objects in the same database query. However, to avoid the much
larger result set that would result from joining across a ‘many’
relationship, select_related is limited to single-valued relationships -
foreign key and one-to-one.

prefetch_related, on the other hand, does a separate lookup for each
relationship, and does the ‘joining’ in Python. This allows it to prefetch
many-to-many and many-to-one objects, which cannot be done using
select_related, in addition to the foreign key and one-to-one relationships
that are supported by select_related. It also supports prefetching of
GenericRelation

 and GenericForeignKey
,
however, it must be restricted to a homogeneous set of results. For
example, prefetching objects referenced by a GenericForeignKey is only
supported if the query is restricted to one ContentType.

For example, suppose you have these models:

from django.db import models
class Topping(models.Model):
name = models.CharField(max_length=30)
class Pizza(models.Model):
name = models.CharField(max_length=50)
toppings = models.ManyToManyField(Topping)

def __str__(self):  # __unicode__ on Python 2
return "%s (%s)" % (
self.name,
", ".join(topping.name for topping in self.toppings.all()),
)

and run:

>>> Pizza.objects.all()

Url : https://docs.djangoproject.com/en/1.10/ref/models/querysets/


On Wed, 13 Oct 2021, 2:06 PM Eugene TUYIZERE, 
wrote:

> Dear All,
>
> Kindly assist me to have a tutorial or code to make this kind of table in
> django. I failed to do this from the datatable .net tutorial.
> [image: image.png]
>
> regards,
>
> --
> * Eugene*
>
> --
> 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/CABxpZHuY_zoSvcwQL79UPts6g%3DmJRD%3DO_B%2Bc5%3DvinOtPKNLFLw%40mail.gmail.com
> 
> .
>

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OnlineBook - High Performance Django

[Brent Clark]

Good day Guys

I got this off news.python.sc, and thought I would share in case anyone 
misses it.


https://lincolnloop.com/high-performance-django/index.html

Definitely some tidbits of information, esp to areas of securing and 
performance improving.


HTH
Regards
Brent


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Child data table in Django

[Eugene TUYIZERE]

Dear All,

Kindly assist me to have a tutorial or code to make this kind of table in
django. I failed to do this from the datatable .net tutorial.
[image: image.png]

regards,

-- 
* Eugene*

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