I am trying to use TreeBeard's built in Form's with django forms (not admin). I specifically wanted to replace the rendering of a Select ForeignKey field with TreeBeard forms format. I thought I could do this by declaring the field in my ModelForm, but I've had no success. I'm new to django so my understanding is limited.
These are my initial classes in my forms.py
MyCategories = movenodeform_factory(Category)
class CreatePost(ModelForm):
class Meta:
model = Post
fields = ['title', 'category', 'region', 'content', ]
I tried implementing it by declaring the category field in the beginning but this clearly isn't the way to do it. The declaration does return an html formatted category list, but I can't replace the Post category (which is a ForeignKey)with it.
class CreatePost(ModelForm):
category = movenodeform_factory(Category)
class Meta:
model = Post
fields = ['title', 'category', 'region', 'content', ]
The reason I want to use TreeBeard forms is because of the way it nests the fields according to the category hierarchy.
SOLVED:
This ended up being much simpler than I realized.
class CreatePost(ModelForm):
CHOICES = MoveNodeForm.mk_dropdown_tree(Category)
category = ChoiceField(choices=CHOICES)
class Meta:
model = Post
fields = ['title', 'category', 'region', 'content', ]
The solution was right in front of me. I just needed to create a list using mk_dropdown_tree and use it in a ChoiceField. I hope this might help someone someday.
class CreatePost(ModelForm):
CHOICES = MoveNodeForm.mk_dropdown_tree(Category)
category = ChoiceField(choices=CHOICES)
class Meta:
model = Post
fields = ['title', 'category', 'region', 'content', ]
I can't seem to work out how to hook into the queryset of a readonly field in Django admin. In particular I want to do this for an inline admin.
# models.py
class Value(models.Model):
name = models.TextField()
class AnotherModel(models.Model):
values = models.ManyToManyField(Value)
class Model(models.Model):
another_model = models.ForeignKey(AnotherModel)
# admin.py
class AnotherModelInline(admin.TabularInline):
# How do I order values by 'name'?
readonly_fields = ('values',)
class ModelAdmin(admin.ModelAdmin):
inlines = (AnotherModelInline,)
Note that this could probably be done by overriding the form and then setting the widget to disabled, but that's a bit of a hack and doesn't look nice (I don't want greyed out multi-select, but a comma-separated list of words.
You can set an ordering metadata in the Values model:
class Value(models.Model):
name = models.TextField()
class Meta:
ordering = ['name']
I'm trying to limit Django Admin choices of a ForeignKey using limit_choices_to, but I can't figure out how to do it properly.
This code does what I want if the category id is 16, but I can't figure out how to use the current category id rather than hard-coding it.
class MovieCategory(models.Model):
category = models.ForeignKey(Category)
movie = models.ForeignKey(Movie)
prefix = models.ForeignKey('Prefix', limit_choices_to={'category_id': '16'},
blank=True, null=True)
number = models.DecimalField(verbose_name='Movie Number', max_digits=2,
blank=True, null=True, decimal_places=0)
Is it possible to refer to the id of the category ForeignKey somehow?
After hours of reading semi related questions I finally figured this out.
You can't self reference a Model the way I was trying to do so there is no way to make Django act the way I wanted using limit_choices_to because it can't find the id of a different ForeignKey in the same model.
This can apparently be done if you change the way Django works, but a simpler way to solve this was to make changes to admin.py instead.
Here is what this looks like in my models.py now:
# models.py
class MovieCategory(models.Model):
category = models.ForeignKey(Category)
movie = models.ForeignKey(Movie)
prefix = models.ForeignKey('Prefix', blank=True, null=True)
number = models.DecimalField(verbose_name='Movie Number', max_digits=2,
blank=True, null=True, decimal_places=0)
I simply removed limit_choices_to entirely.
I found a similar problem here with the solution posted by Kyle Duncan. The difference though is that this uses ManyToMany and not ForeignKey. That means I had to remove filter_horizontal = ('prefix',) under my class MovieCategoryAdmin(admin.ModelAdmin): as that is only for ManyToMany fields.
In admin.py I had to add from django import forms at the top to create a form. This is how the form looks:
class MovieCategoryForm(forms.ModelForm):
class Meta:
model = MovieCategory
fields = ['prefix']
def __init__(self, *args, **kwargs):
super(MovieCategoryForm, self).__init__(*args, **kwargs)
self.fields['prefix'].queryset = Prefix.objects.filter(
category_id=self.instance.category.id)
And my AdminModel:
class MovieCategoryAdmin(admin.ModelAdmin):
"""
Admin Class for 'Movie Category'.
"""
fieldsets = [
('Category', {'fields': ['category']}),
('Movie', {'fields': ['movie']}),
('Prefix', {'fields': ['prefix']}),
('Number', {'fields': ['number']}),
]
list_display = ('category', 'movie', 'prefix', 'number')
search_fields = ['category__category_name', 'movie__title', 'prefix__prefix']
form = MovieCategoryForm
This is exactly how Kyle describes it in his answer, except I had to add fields = ['prefix'] to the Form or it wouldn't run. If you follow his steps and remember to remove filter_horizontal and add the fields you're using it should work.
Edit: This solution works fine when editing, but not when creating a new entry because it can't search for the category id when one doesn't exits. I am trying to figure out how to solve this.
Another approach, if you don't want to add a custom ModelForm, is to handle this in your ModelAdmin's get_form() method. This was preferable for me because I needed easy access to the request object for my queryset.
class StoryAdmin(admin.ModelAdmin):
def get_form(self, request, obj=None, **kwargs):
form = super(StoryAdmin, self).get_form(request, obj, **kwargs)
form.base_fields['local_categories'].queryset = LocalStoryCategory.\
objects.filter(office=request.user.profile.office)
return form
Keep in mind that limit_choices_to supports "Either a dictionary, a Q object, or a callable returning a dictionary or Q object" and should theoretically support any lookup that can be done using django's queryset filtering. A potential solution would then be filtering based on some property of the category that you control such as a slug field.
class MovieCategory(models.Model):
category = models.ForeignKey(Category)
movie = models.ForeignKey(Movie)
prefix = models.ForeignKey('Prefix', blank=True, null=True,
limit_choices_to=Q(category__slug__startswith='movie'))
number = models.DecimalField(verbose_name='Movie Number', max_digits=2,
blank=True, null=True, decimal_places=0)
I had the same question and your self-answer helped me get started. But I also found another post (question-12399803) that completed the answer, that is, how to filter when creating a new entry.
In views.py
form = CustomerForm(groupid=request.user.groups.first().id)
In forms.py
def __init__(self, *args, **kwargs):
if 'groupid' in kwargs:
groupid = kwargs.pop('groupid')
else:
groupid = None
super(CustomerForm, self).__init__(*args, **kwargs)
if not groupid:
groupid = self.instance.group.id
self.fields['address'].queryset = Address.objects.filter(group_id=groupid)
So, whether adding a new customer or updating an existing customer, I can click on a link to go add a new address that will be assigned to that customer.
This is my first answer on StackOverflow. I hope it helps.
I have the following django model:
class Article(models.Model):
title = models.CharField(max_length = 200)
body = models.TextField()
created_date = models.DateTimeField(auto_now_add=True)
I also have the following django admin class:
class ArticleAdmin(admin.ModelAdmin):
fields = ['title', 'body']
readonly_fields = ['created_date']
list_display = ['title', 'body', 'created_date']
In the django admin app I can see the created_date field in my Article list:
But for the life of me I can't get the created_date field to render (as a read only field) when I open an Article:
I got the impression from the docs and from googling around that adding Article's created_date field to readonly_fields would allow this to happen even if I had set auto_now_add to True on a DateTimeField.
Am I barking up the wrong tree here?
I'm using django 1.4.2.
If you've specified fields, you need to add the field to fields.
however, when you specify ModelAdmin.fields or ModelAdmin.fieldsets the read-only fields must be present to be shown (they are ignored otherwise).
The auto_now magic has gotten me a few times.
I'm trying to add a comments component to a bug tracking application using django. I have a text field for comments and a by field--auto-propagated by user id.
I want the comments text field to become read-only after someone saves a comment. I've tried doing this several ways. The best way I have come up with so far is to pass my Comment model into a ModelForm and then use form widget attributes to convert my field to read only.
models.py
class CommentForm(ModelForm):
class Meta:
model = Comment
exclude = ('ticket', 'submitted_date', 'modified_date')
def __init__(self, *args, **kwargs):
super(CommentForm, self).__init__(*args, **kwargs)
instance = getattr(self, 'instance', None)
if instance and instance.id:
self.fields['comments'].widget.attrs['readonly'] = True
class Comment(models.Model):
ticket = models.ForeignKey(Ticket)
by = models.ForeignKey(User, null=True, blank=True, related_name="by")
comments = models.TextField(null=True, blank=True)
submitted_date = models.DateField(auto_now_add=True)
modified_date = models.DateField(auto_now=True)
class Admin:
list_display = ('comments', 'by',
'submitted_date', 'modified_date')
list_filter = ('submitted_date', 'by',)
search_fields = ('comments', 'by',)
My Comment model is associated with my Ticket model in the bug tracking program. I connect the comments to the tickets by placing the comments in an inline in admin.py. The problem now becomes: how do I pass the ModelForm into a TabularInline? TabularInline demands a defined model. However, once I've passed a model into my inline, passing a model form becomes moot.
admin.py
class CommentInline(admin.TabularInline):
model = Comment
form = CommentForm()
search_fields = ['by', ]
list_filter = ['by', ]
fields = ('comments', 'by')
readonly_fields=('by',)
extra = 1
Does anyone know how to pass a ModelForm into a TabularInline without having a regular Model's fields override the ModelForm? Thanks in advance!
Don't instantiate the form in the TabularInline subclass:
form = CommentForm