Python Django admin在使用get_form（）时缺少添加/编辑按钮

在ModelAdmin类中重写

get_form（）

方法时，“添加”和“编辑”（加号和铅笔）图标不会出现在管理页面上的任何字段旁边，即使权限正确。当我删除覆盖的

get\u form（）

方法时，图标就会出现。我正在使用表单工厂呈现ModelForm类，以便根据当前用户执行一些queryset筛选，因此我无法在管理中使用

form=

（表单需要捕获

HttpRequest

对象）

（使用Django 2.1和Python 3.6）

admin.py

@admin.register(Reservation)
class ReservationAdmin(admin.ModelAdmin):
    list_display = ('room', 'check_in_date', 'check_out_date', 'guest', 'reserved_by', 'reserved_on')
    inlines = (RoomChangeInline,)


    fieldsets = ( 
    (None, {
        'fields': (
            ('room', 'guest'),
            ('check_in_date', 'check_out_date'),
            ('adults', 'children'),
            ('subtotal', 'taxes', 'deposit'),
            ('reserved_by', 'reserved_on')
        )
    }),)   

    def get_form(self, request, obj=None, **kwargs):
        return reservation_admin_form_factory(request)

def reservation_admin_form_factory(request):
    class ReservationAdminForm(forms.ModelForm):
        class Meta: 
            model = Reservation
            exclude = []
            widgets = {
                'check_in_date': forms.DateInput(attrs={'type': 'date'}),
                'check_out_date': forms.DateInput(attrs={'type': 'date'})
            }

        """ I have an __init__() method, but even if I remove it 
        the problem remains, so I am not showing it here. """

    return ReservationAdminForm

from django import forms
from django.conf import settings
from django.contrib.admin.widgets import RelatedFieldWidgetWrapper
from django.db.models.fields.reverse_related import ManyToOneRel

def reservation_admin_form_factory(request, admin_site):
    class ReservationAdminForm(forms.ModelForm):
        class Meta:
            model = Reservation
            exclude = []

        def __init__(self, *args, **kwargs):
            super().__init__(*args, **kwargs)
            rel = ManyToOneRel(Reservation.guest, Guest, 'id')
            self.fields['guest'].widget = RelatedFieldWidgetWrapper(
                 self.fields['guest'].widget, rel, admin_site, 
                     can_change_related=True)

forms.py

@admin.register(Reservation)
class ReservationAdmin(admin.ModelAdmin):
    list_display = ('room', 'check_in_date', 'check_out_date', 'guest', 'reserved_by', 'reserved_on')
    inlines = (RoomChangeInline,)


    fieldsets = ( 
    (None, {
        'fields': (
            ('room', 'guest'),
            ('check_in_date', 'check_out_date'),
            ('adults', 'children'),
            ('subtotal', 'taxes', 'deposit'),
            ('reserved_by', 'reserved_on')
        )
    }),)   

    def get_form(self, request, obj=None, **kwargs):
        return reservation_admin_form_factory(request)

def reservation_admin_form_factory(request):
    class ReservationAdminForm(forms.ModelForm):
        class Meta: 
            model = Reservation
            exclude = []
            widgets = {
                'check_in_date': forms.DateInput(attrs={'type': 'date'}),
                'check_out_date': forms.DateInput(attrs={'type': 'date'})
            }

        """ I have an __init__() method, but even if I remove it 
        the problem remains, so I am not showing it here. """

    return ReservationAdminForm

from django import forms
from django.conf import settings
from django.contrib.admin.widgets import RelatedFieldWidgetWrapper
from django.db.models.fields.reverse_related import ManyToOneRel

def reservation_admin_form_factory(request, admin_site):
    class ReservationAdminForm(forms.ModelForm):
        class Meta:
            model = Reservation
            exclude = []

        def __init__(self, *args, **kwargs):
            super().__init__(*args, **kwargs)
            rel = ManyToOneRel(Reservation.guest, Guest, 'id')
            self.fields['guest'].widget = RelatedFieldWidgetWrapper(
                 self.fields['guest'].widget, rel, admin_site, 
                     can_change_related=True)

---

要在覆盖ModelAdmin的

get\u form（）

时显示Django admin change\u form页面上的添加/编辑按钮，需要将字段的小部件包装在

RelatedFieldWidgetWrapper

中，如下所示：

forms.py

@admin.register(Reservation)
class ReservationAdmin(admin.ModelAdmin):
    list_display = ('room', 'check_in_date', 'check_out_date', 'guest', 'reserved_by', 'reserved_on')
    inlines = (RoomChangeInline,)


    fieldsets = ( 
    (None, {
        'fields': (
            ('room', 'guest'),
            ('check_in_date', 'check_out_date'),
            ('adults', 'children'),
            ('subtotal', 'taxes', 'deposit'),
            ('reserved_by', 'reserved_on')
        )
    }),)   

    def get_form(self, request, obj=None, **kwargs):
        return reservation_admin_form_factory(request)

def reservation_admin_form_factory(request):
    class ReservationAdminForm(forms.ModelForm):
        class Meta: 
            model = Reservation
            exclude = []
            widgets = {
                'check_in_date': forms.DateInput(attrs={'type': 'date'}),
                'check_out_date': forms.DateInput(attrs={'type': 'date'})
            }

        """ I have an __init__() method, but even if I remove it 
        the problem remains, so I am not showing it here. """

    return ReservationAdminForm

from django import forms
from django.conf import settings
from django.contrib.admin.widgets import RelatedFieldWidgetWrapper
from django.db.models.fields.reverse_related import ManyToOneRel

def reservation_admin_form_factory(request, admin_site):
    class ReservationAdminForm(forms.ModelForm):
        class Meta:
            model = Reservation
            exclude = []

        def __init__(self, *args, **kwargs):
            super().__init__(*args, **kwargs)
            rel = ManyToOneRel(Reservation.guest, Guest, 'id')
            self.fields['guest'].widget = RelatedFieldWidgetWrapper(
                 self.fields['guest'].widget, rel, admin_site, 
                     can_change_related=True)

请注意，上面使用了表单工厂（

reservation\u admin\u form\u factory

）来捕获

admin\u站点

对象，这是

RelatedFieldWidgetWrapper

所需的

admin.py*

@admin.register(Reservation)
class ReservationAdmin(admin.ModelAdmin):
    list_display = ('check_in_date', 'check_out_date')

    def get_form(self, request, obj=None, **kwargs):
        self.form = reservation_admin_form_factory(request, admin.site)
        return super().get_form(request, obj, **kwargs)

---

如果您只是在

ReservationAdmin

中说

form=ReservationAdminForm

并删除

get\u form（）

方法（而不是使用表单工厂），是否会发生同样的情况，我看到管理员更改表单上出现了预期的按钮。可能原始的

get\u表单

返回一个表单，指向一些HTML字段模板，其中包括这些按钮？谢谢Raydel。根据您的建议，我查看了get_form（）的源代码。该方法调用modelform\u factory（），它接受多个参数，关键参数是

formfield\u callback

。因此，我的新代码看起来是这样的（抱歉，无法在注释中获得正确的格式，因此我使用了pastebin）：好的，这不起作用。最初，它似乎在工作，正如图标所示，但事实上Django正在完成忽略我的自定义

ModelForm

对象。修复方法是在

RelatedFieldWidgetWrapper

调用中包装字段的小部件（参见答案）。这对我来说几乎是可行的。只是弹出窗口不会打开，而是加载到当前选项卡/页面中。事实上，我正在使用一个修改过的版本作为dajngo管理操作的中间页面，该操作带有一个自定义模板。我还尝试在模板中添加

{{form.media}

，因为我认为弹出窗口是使用JS调用的。但这对我也不起作用。