subject:"limit_choices

Re: Allow a limit_choices_to callable to accept the current model instances object

2018-09-25 Thread Tim Graham

There's a ticket with that feature request: 
https://code.djangoproject.com/ticket/25306

On Tuesday, September 25, 2018 at 6:25:38 PM UTC-4, Ochui Princewill wrote:
>
> Hello, 
>
> Am current working on a project and i want to filter the content of a 
> ForeignkeyField base on the current model object
>
> class Subscription(models.Model):
> user = models.ForeignKey(settings.AUTH_USER_MODEL, on_delete
> =models.CASCADE)
> plan = models.ForeignKey(Plan, on_delete=models.CASCADE)
> expires = models.DateField()
> created_at = models.DateTimeField(auto_now_add=True)
>
> class Profile(models.Model):
> user = models.OneToOneField(settings.AUTH_USER_MODEL, 
> on_delete=models.CASCADE, 
> editable=False)
> subscription = models.ForeignKey(Subscription, limit_choices_to={'user_id': 
> settings.AUTH_USER_MODEL}, on_delete=models.SET_NULL, null=True, blank=
> True)
>
>

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Allow a limit_choices_to callable to accept the current model instances object

2018-09-25 Thread Ochui Princewill

Hello, 

Am current working on a project and i want to filter the content of a 
ForeignkeyField base on the current model object

class Subscription(models.Model):
user = models.ForeignKey(settings.AUTH_USER_MODEL, on_delete=models.CASCADE)
plan = models.ForeignKey(Plan, on_delete=models.CASCADE)
expires = models.DateField()
created_at = models.DateTimeField(auto_now_add=True)

class Profile(models.Model):
user = models.OneToOneField(settings.AUTH_USER_MODEL, on_delete=models.CASCADE, 
editable=False)
subscription = models.ForeignKey(Subscription, limit_choices_to={'user_id': 
settings.AUTH_USER_MODEL}, on_delete=models.SET_NULL, null=True, blank=True)

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Re: New member: Germano Carella. I need help with django, limit_choices_to and admin interface

2018-08-10 Thread germano carella


I found a tutorial!

I studied ForeignKey and how it works with sets... Now, I'll learn how 
to create a form and how to save the new data in set.


Thanks!



Il 09/08/2018 22:59, Julio Biason ha scritto:

Hi Germano,

When you use "ManyToMany", you're saying "any book can have any 
chapter and vice versa". That's obviously what you don't want. What 
you want is "A book has a closed set of chapters". This is done by 
thinking a bit on the other way with Django: Instead of saying "There 
is a list of chapters of this book", you say "The chapter belongs to a 
single book" with a foreign key:


class Book(models.Model):
   title = models.CharField(max_length=250)

class Chapters(models.Model):
   title = models.CharField(max_length=250)
   text = models.TextField()
   book = models.ForeignKey(Book)

Now a chapter can belong only to a book.

On Thu, Aug 9, 2018 at 4:34 PM, Germano Carella 
mailto:germano.care...@gmail.com>> wrote:


Hi,
I'm Germano from Italy. I'm new of django.
Probably this discussion has many many examples, but I can't find
my situation.
I have two models, Book and Chapters.
These are simple models, I need them only for educational purpose.

class Book(models.Model):
    title=models.CharField(max_length=250)
    chapters = models.ManyToManyField('Chapters')

class Chapters(models.Model):
    title_of_chapter = models.CharField(max_length=250)
    text=models.TextField()

Now, in admin interface I can add chapters on a new book and it
works fine.
So, whdn I try to add a second book I can see chapters of book I
added previously.

When I add a new book I want see only chapter of this book. List
must be empty if I'm adding a new book.
It's very simple, but I can't find a way to make it working.

I tried somethings, such as
chapters=
models.ManyToManyField('Chapters',limit_choices_to=Q('book__title'=title))
But this not works.
I know Chapters has book_set, that is the set of references for a
chapter.

There is a way to make it working?
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_99907 0554_

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Re: New member: Germano Carella. I need help with django, limit_choices_to and admin interface

2018-08-09 Thread germano carella

Hi Julio,

Thanks, now is clear.

Ok, I created models correctly and createa book in admin interface. Now
I can create chapters to add this book.

Now I want to learn how to create an interface that allows an user to
add a new book, click on next button and add chapters to this book that
is selected by default in book select list.

Can you point me in a tutorial, or document?

Thanks in advance,

Germano

Il 09/08/2018 22:59, Julio Biason ha scritto:

Hi Germano,

When you use "ManyToMany", you're saying "any book can have any
chapter and vice versa". That's obviously what you don't want. What
you want is "A book has a closed set of chapters". This is done by
thinking a bit on the other way with Django: Instead of saying "There
is a list of chapters of this book", you say "The chapter belongs to a
single book" with a foreign key:

class Book(models.Model):
title = models.CharField(max_length=250)

class Chapters(models.Model):
title = models.CharField(max_length=250)
text = models.TextField()
book = models.ForeignKey(Book)

Now a chapter can belong only to a book.

On Thu, Aug 9, 2018 at 4:34 PM, Germano Carella
mailto:germano.care...@gmail.com>> wrote:

Hi,
I'm Germano from Italy. I'm new of django.
Probably this discussion has many many examples, but I can't find
my situation.
I have two models, Book and Chapters.
These are simple models, I need them only for educational purpose.

class Book(models.Model):
title=models.CharField(max_length=250)
chapters = models.ManyToManyField('Chapters')

class Chapters(models.Model):
title_of_chapter = models.CharField(max_length=250)
text=models.TextField()

Now, in admin interface I can add chapters on a new book and it
works fine.
So, whdn I try to add a second book I can see chapters of book I
added previously.

When I add a new book I want see only chapter of this book. List
must be empty if I'm adding a new book.
It's very simple, but I can't find a way to make it working.

I tried somethings, such as
chapters=
models.ManyToManyField('Chapters',limit_choices_to=Q('book__title'=title))
But this not works.
I know Chapters has book_set, that is the set of references for a
chapter.

There is a way to make it working?
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<https://groups.google.com/d/optout>.

--
*Julio Biason*,Sofware Engineer
*AZION* | Deliver. Accelerate. Protect.
Office: +55 51 3083 8101 | Mobile: +55 51
_99907 0554_

Visit this group at https://groups.google.com/group/django-users.
To view this discussion on the web visit
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<https://groups.google.com/d/msgid/django-users/CAEM7gE0rAfJPYbgKxgHCRYwVuAEBGQrz5X2WxOJdOW6mG%3DzK3Q%40mail.gmail.com?utm_medium=email_source=footer>.

For more options, visit https://groups.google.com/d/optout.

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