Django管理员，具有多对多选项

我有以下

models.py

和

admin.py

文件。其目的是在必要时为给定产品选择多个类别

型号.py

class Product(models.Model):
    organization = models.ForeignKey(Organization)
    name = models.CharField(max_length=50)
    brief = models.CharField(max_length=100)
    descrip = models.TextField(max_length=1300)
    categories = models.ManyToManyField('Product_Category')

class Product_Category(models.Model):
    cats = {"AUT":"Automation", "PWA":"Personal Wealth Advisory", 
            "BCH":"Blockchain", "LOS":"Loan Origination", "FX":"Foreign Exchange"}
    choices = tuple((human, c) for human, c in cats.items())
    name = models.CharField(max_length=32, choices=choices)

 from .models import Product, Product_Feature, Organization, Product_Category

class PFeatureInLine(admin.StackedInline):
    model = Product_Feature
    extra = 1

class ProductForm(forms.ModelForm):
    logo_file = forms.ImageField()

    def save(self, commit=True):
        logo_file = self.cleaned_data.get("logo_file", None)
        self.instance.logo = b64encode(logo_file.read()).decode("utf-8")
        return forms.BaseModelForm.save(self, commit=commit)

    class Meta():
        exclude = ["logo"]
        model = Product

class ProductAdmin(admin.ModelAdmin):
    form = ProductForm
    inlines = [PFeatureInLine,]

admin.site.register(Product, ProductAdmin)
admin.site.register(Organization)

admin.py

class Product(models.Model):
    organization = models.ForeignKey(Organization)
    name = models.CharField(max_length=50)
    brief = models.CharField(max_length=100)
    descrip = models.TextField(max_length=1300)
    categories = models.ManyToManyField('Product_Category')

class Product_Category(models.Model):
    cats = {"AUT":"Automation", "PWA":"Personal Wealth Advisory", 
            "BCH":"Blockchain", "LOS":"Loan Origination", "FX":"Foreign Exchange"}
    choices = tuple((human, c) for human, c in cats.items())
    name = models.CharField(max_length=32, choices=choices)

 from .models import Product, Product_Feature, Organization, Product_Category

class PFeatureInLine(admin.StackedInline):
    model = Product_Feature
    extra = 1

class ProductForm(forms.ModelForm):
    logo_file = forms.ImageField()

    def save(self, commit=True):
        logo_file = self.cleaned_data.get("logo_file", None)
        self.instance.logo = b64encode(logo_file.read()).decode("utf-8")
        return forms.BaseModelForm.save(self, commit=commit)

    class Meta():
        exclude = ["logo"]
        model = Product

class ProductAdmin(admin.ModelAdmin):
    form = ProductForm
    inlines = [PFeatureInLine,]

admin.site.register(Product, ProductAdmin)
admin.site.register(Organization)

当通过admin访问

产品

对象时，会产生以下结果：

---

您需要这样显示吗

我建议您使用

FilteredSelectMultiple

：

from django import forms
from django.contrib import admin
from django.contrib.admin.widgets import FilteredSelectMultiple

from .models import Product, Product_Feature, Organization, Product_Category


class ProductForm(forms.ModelForm):
    logo_file = forms.ImageField()

    categories = forms.ModelMultipleChoiceField(
          queryset=Product_Category.objects.all(),
          required=False,
          widget=FilteredSelectMultiple(
              verbose_name=_('Categories'),
              is_stacked=False
          )
    )

    def __init__(self, *args, **kwargs):
        super(ProductForm, self).__init__(*args, **kwargs)

        if self.instance and self.instance.pk:
            self.fields['categories'].initial = self.instance.categories.all()

    def save(self, commit=True):
        logo_file = self.cleaned_data.get("logo_file", None)
        self.instance.logo = b64encode(logo_file.read()).decode("utf-8")
        return forms.BaseModelForm.save(self, commit=commit)

    class Meta:
        exclude = ['logo']
        model = Product


class ProductAdmin(admin.ModelAdmin):
    form = ProductForm
    inlines = [PFeatureInLine,]

---

谢谢你。我有FilteredSelectMultiple小部件，但是它没有显示任何已定义的类别，它还是空白的。看这里：啊，好的。所以我需要在每一个类别中做一个？您知道如何更改此处的显示，使其成为类别的名称，而不是

Product\u category object

：您应该为python3创建

def\uu str\uuuuuuuuuuuuuself（self）:return self.name

，或为python2创建

def\uuuuuuuuuuuuuuuuuuuuuuuuself:return.name

，在

models.py中的class
Product\u类别
的类内

谢谢，这很有意义。这是否意味着，每当我添加一个新类别时，我都需要先创建该类别的实例，然后才能将其视为可用于过滤器小部件？