Django Admin中GenericStackedInline对象复制功能实现问询

方案一：修复django-inline-actions在带fieldset的GenericStackedInline中显示按钮的问题 #

django-inline-actions默认模板不会把按钮渲染到fieldset区域内，只需自定义inline模板即可解决：

1. 定义继承InlineActionsMixin的GenericStackedInline类，实现克隆逻辑：

from django.contrib.contenttypes.admin import GenericStackedInline
from inline_actions.admin import InlineActionsMixin

class YourGenericInline(InlineActionsMixin, GenericStackedInline):
    model = YourRelatedModel
    fieldsets = (
        ('基本信息', {
            'fields': ('name', 'content',)
        }),
    )
    inline_actions = ['clone_object']

    def clone_object(self, request, obj, parent_obj):
        # 复制对象并关联到当前父对象
        cloned_obj = obj.__class__.objects.get(pk=obj.pk)
        cloned_obj.pk = None
        cloned_obj.content_object = parent_obj
        cloned_obj.save()

2. 自定义inline模板admin/your_app/your_generic_inline.html，将action按钮插入到fieldset之后：

{% extends "admin/edit_inline/stacked.html" %}
{% load inline_actions %}

{% block inline_fieldset %}
    {{ block.super }}
    {% inline_actions for inline form %}
{% endblock %}

3. 在Inline类中指定自定义模板：

class YourGenericInline(InlineActionsMixin, GenericStackedInline):
    # ... 其他配置
    template = 'admin/your_app/your_generic_inline.html'

方案二：添加“Clone”复选框，保存时自动复制对象 #

无需额外依赖，通过自定义表单和重写父模型Admin的save_formset实现：

1. 自定义inline表单，添加克隆复选框：

from django import forms

class YourInlineForm(forms.ModelForm):
    clone = forms.BooleanField(label='Clone', required=False)

    class Meta:
        model = YourRelatedModel
        fields = '__all__'

2. 在GenericStackedInline中使用该表单：

class YourGenericInline(GenericStackedInline):
    model = YourRelatedModel
    form = YourInlineForm
    fieldsets = (
        ('基本信息', {
            'fields': ('name', 'content',)
        }),
    )

3. 重写父模型Admin的save_formset方法，处理克隆逻辑：

from django.contrib import admin
from .models import ParentModel, YourRelatedModel

@admin.register(ParentModel)
class ParentModelAdmin(admin.ModelAdmin):
    inlines = [YourGenericInline]

    def save_formset(self, request, form, formset, change):
        instances = formset.save(commit=False)
        formset.save_m2m()
        # 删除标记删除的对象
        for obj in formset.deleted_objects:
            obj.delete()
        # 处理克隆请求
        for instance in instances:
            if getattr(instance, 'clone', False):
                clone_obj = instance.__class__.objects.get(pk=instance.pk)
                clone_obj.pk = None
                clone_obj.content_object = form.instance
                clone_obj.save()
            instance.save()

内容的提问来源于stack exchange，提问作者user1383029