在django管理表单中添加父字段

# models.py
from django.db import models

class ParentModel(models.Model):
    name = models.CharField(max_length=100)

class ChildModel(models.Model):
    parent = models.ForeignKey(ParentModel, on_delete=models.CASCADE)
    name = models.CharField(max_length=100)

# forms.py
from django import forms
from .models import ChildModel

class ChildModelForm(forms.ModelForm):
    parent = forms.ModelChoiceField(queryset=ParentModel.objects.all())

    class Meta:
        model = ChildModel
        fields = '__all__'

# admin.py
from django.contrib import admin
from .models import ChildModel
from .forms import ChildModelForm

class ChildModelAdmin(admin.ModelAdmin):
    form = ChildModelForm

    def formfield_for_foreignkey(self, db_field, request, **kwargs):
        if db_field.name == 'parent':
            kwargs['queryset'] = ParentModel.objects.filter(...)  # 设置外键字段的查询集
        return super().formfield_for_foreignkey(db_field, request, **kwargs)

admin.site.register(ChildModel, ChildModelAdmin)