Django模型选择选项作为多选框

Question

假设我有这样的模型

COLORS= (
    ('R', 'Red'),
    ('B', 'Yellow'),
    ('G', 'White'),
)
class Car(models.Model):
    name = models.CharField(max_length=20)
    color= models.CharField(max_length=1, choices=COLORS)

它在管理面板中显示为一个selectbox，但是我希望我的管理员用户可以像多对多关系一样多选择那些颜色，如果没有('RB', 'Red&Blue'),类型的逻辑，这是如何实现的

Answer 1

我已经用有意义的模型构建了一个完整的工作示例。它工作得很好。我在Python3.4.x和Django1.8.4上测试过。 首先，我运行管理面板并为Thema模型中的每个选项创建记录

模型.py

from django.db import models

class Author(models.Model):
    fname = models.CharField(max_length=50)
    lname = models.CharField(max_length=80)

    def __str__(self):
        return "{0} {1}".format(self.fname, self.lname)


class Thema(models.Model):
    THEME_CHOICES = (
        ('tech', 'Technical'),
        ('novel', 'Novel'),
        ('physco', 'Phsycological'),
    )
    name = models.CharField(max_length=20,choices=THEME_CHOICES, unique=True)

    def __str__(self):
        return self.name

class Book(models.Model):

    name = models.CharField(max_length=50)
    author = models.ForeignKey(Author)
    themes = models.ManyToManyField(Thema)

    def __str__(self):
        return "{0} by {1}".format(self.name,self.author)

表单.py

from django import forms

from .models import *

class BookForm(forms.ModelForm):
    themes = forms.ModelMultipleChoiceField(queryset=Thema.objects, widget=forms.CheckboxSelectMultiple(), required=False)

管理.py

from django.contrib import admin

from .models import *
from .forms import *

@admin.register(Author)
class AuthorAdmin(admin.ModelAdmin):
    pass


@admin.register(Book)    
class BookAdmin(admin.ModelAdmin):
    form = BookForm


@admin.register(Thema)
class ThemaAdmin(admin.ModelAdmin):
    pass