Question

我有一个具有CharField的模型，在管理员中我想向窗口小部件添加选项。原因是我使用的是代理模型，并且有很多模型共享这个CharField，但它们各有不同的选择。

class MyModel(MyBaseModel):
    stuff = models.CharField('Stuff', max_length=255, default=None)

    class Meta:
        proxy = True

class MyModelAdmin(admin.ModelAdmin):
    fields = ('stuff',)
    list_display = ('stuff',)
admin.site.register(MyModel, MyModelAdmin)

对于此模型，我想在MY_CHOICES中使用MyModelAdmin。

我是否覆盖小部件？我是否需要覆盖整个表单？

Answer 1

from django.contrib import admin
from django import forms

class MyModel(MyBaseModel):
    stuff = models.CharField('Stuff', max_length=255, default=None)

    class Meta:
        proxy = True

class MyModelForm(forms.ModelForm):
    MY_CHOICES = (
        ('A', 'Choice A'),
        ('B', 'Choice B'),
    )

    stuff = forms.ChoiceField(choices=MY_CHOICES)

class MyModelAdmin(admin.ModelAdmin):
    fields = ('stuff',)
    list_display = ('stuff',)
    form = MyModelForm

admin.site.register(MyModel, MyModelAdmin)

请参阅：https://docs.djangoproject.com/en/dev/ref/forms/fields/#choicefield

Answer 2

您需要覆盖ModelAdmin将要使用的表单：

class MyForm(forms.ModelForm):
    stuff = forms.CharField('Stuff', max_length=255, choices=MY_CHOICES, default=None)

    class Meta:
        model = MyModel
        fields = ('stuff', 'other_field', 'another_field')


class MyModelAdmin(admin.ModelAdmin):
    fields = ('stuff',)
    list_display = ('stuff',)
    form = MyForm()

如果你需要你的选择是动态的，也许你可以做类似的事情：

class MyForm(forms.ModelForm):
    stuff = forms.CharField('Stuff', max_length=255, choices=MY_CHOICES, default=None)

    def __init__(self, stuff_choices=(), *args, **kwargs):
        # receive a tupple/list for custom choices
        super(MyForm, self).__init__(*args, **kwargs)
        self.fields['stuff'].choices = stuff_choices

并在ModelAdmin的{{1}}中定义__init__将会是什么，并在那里指定表单实例：

祝你好运！：）

Answer 3

您可以以不需要创建新表单的方式覆盖formfield_for_choice_field()。

class MyModelAdmin(admin.ModelAdmin):
    def formfield_for_choice_field(self, db_field, request, **kwargs):
        if db_field.name == 'status':
            kwargs['choices'] = (
                ('accepted', 'Accepted'),
                ('denied', 'Denied'),
            )
            if request.user.is_superuser:
                kwargs['choices'] += (('ready', 'Ready for deployment'),)
        return super().formfield_for_choice_field(db_field, request, **kwargs)

请参阅formfield_for_choice_field

Answer 4

您不需要自定义表单。

这是您的最低要求：

# models.py
from __future__ import unicode_literals

from django.db import models

class Photo(models.Model):
    CHOICES = (
        ('hero', 'Hero'),
        ('story', 'Our Story'),
    )

    name = models.CharField(max_length=250, null=False, choices=CHOICES)

# admin.py
from django.contrib import admin
from .models import Photo


class PhotoAdmin(admin.ModelAdmin):
    list_display = ('name',)


admin.site.register(Photo, PhotoAdmin)

Answer 5

在Gerard's answer，如果你保留：

def __init__(self, stuff_choices=(), *args, **kwargs):

然后当您尝试从管理员添加新模型时，您将始终获得“此字段是必需的”。对于所有必填字段。

您应该从初始化中删除stuff_choices=()：

def __init__(self,*args, **kwargs):

Answer 6

您需要考虑如何在数据库级别存储数据。我建议这样做：

运行此pip命令：pip install django-multiselectfield

在models.py文件中：

from multiselectfield import MultiSelectField

MY_CHOICES = (('item_key1', 'Item title 1.1'),
          ('item_key2', 'Item title 1.2'),
          ('item_key3', 'Item title 1.3'),
          ('item_key4', 'Item title 1.4'),
          ('item_key5', 'Item title 1.5'))

class MyModel(models.Model):
      my_field = MultiSelectField(choices=MY_CHOICES)

在您的settings.py中：

 INSTALLED_APPS = (
      'django.contrib.auth',
      'django.contrib.contenttypes',
      'django.contrib.sessions',
      'django.contrib.sites',
      'django.contrib.admin',

      #.....................#

      'multiselectfield',
)

观看MAGIC的发生！

来源：

https://pypi.python.org/pypi/django-multiselectfield

Answer 7

下面的解决方案可立即与Postgres的特殊ArrayField一起使用：

# models.py

class MyModel(models.Model):
    class Meta:
        app_label = 'appname'

    name = models.CharField(max_length=1000, blank=True)
  
    ROLE_1 = 'r1'
    ROLE_2 = 'r2'
    ROLE_3 = 'r3'

    ROLE_CHOICES = (
        (ROLE_1, 'role 1 name'),
        (ROLE_2, 'role 2 name'),
        (ROLE_3, 'role 3 name'),
    )

    roles = ArrayField(
        models.CharField(choices=ROLE_CHOICES, max_length=2, blank=True),
        default=list
    )

# admin.py

class MyModelForm(ModelForm):
    roles = MultipleChoiceField(choices=MyModel.ROLE_CHOICES, widget=CheckboxSelectMultiple)


@admin.register(MyModel)
class MyModelAdmin(admin.ModelAdmin):
    form = MyModelForm
    list_display = ("pk", "name", "roles")

（Django 2.2）

Django管理员选择字段

7 个答案: