问题描述

当我在表单中定义多选字段(照片)时，用于在管理表单中添加新实例的绿色加号按钮消失了.即，删除带有定义的行 (photos = ...) 会使加号出现.但是，为了使用自定义字段/小部件，我需要弄清楚这一点.

The green plus sign button for adding new instances in the admin form disappears for my MultiSelect field (photos) when I define it in my form. Ie, removing the line with the definition (photos = ...) makes the plus sign appear. However, in order to use a custom Field/Widget I need to figure this out.

class GalleryForm(ModelForm):

    photos = ModelMultipleChoiceField(queryset=Photo.objects.all(), label="Photos")

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

我查看了 Django 源代码，似乎我必须将我的小部件包装在 RelatedFieldWidgetWrapper 中，但我还没有完全理解它.感谢任何帮助！

I've peeked at the Django source code and it seems like I have to wrap my widget in a RelatedFieldWidgetWrapper, but I haven't quite gotten my head around it. Any help is apprecietad!

推荐答案

借助 lazerscience 和这个 post 我得到了以下结果.

With the help from lazerscience and this post I ended up with the following.

模型管理员:

class GalleryAdmin(admin.ModelAdmin):

    form = GalleryForm

    def __init__(self, model, admin_site):
        self.form.admin_site = admin_site 
        super(GalleryAdmin, self).__init__(model, admin_site)

还有我的表格:

class GalleryForm(ModelForm):

    photos = ThumbnailChoiceField(queryset=Photo.objects.all(), label='Photos', widget=MyWidget(), required=False)

    def __init__(self, *args, **kwargs):
        super(GalleryForm, self).__init__(*args, **kwargs)
        rel = ManyToOneRel(self.instance.photos.model, 'id') 
        self.fields['photos'].widget = RelatedFieldWidgetWrapper(self.fields['photos'].widget, rel, self.admin_site) 

这篇关于Django admin - 如何在自定义管理表单中为多对多字段添加绿色加号的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持跟版网！