在Django管理界面中显示子行

from django.contrib import admin
from .models import ParentModel, ChildModel
from django.contrib.admin import TabularInline

class ChildModelInline(admin.TabularInline):
    model = ChildModel
    extra = 1

class ParentModelAdmin(admin.ModelAdmin):
    inlines = [ChildModelInline]

admin.site.register(ParentModel, ParentModelAdmin)