问题描述
我有一个自定义的 User 模型( AbstractUser )和一个 Stock 模型.假设有多个用户角色经理，供应商等.经理可以查看其他经理的详细信息和供应商详细信息.
I have a custom User model(AbstractUser) and a Stock model. Assume there's multiple user roles manager, supplier etc. The manager can be able to view other manager's details and supplier details.
User 模型具有有条件的内联，如果用户角色等于供应商 .(这里的角色是 PositiveSmallIntegerField ，其中包含选项和 SUPPLIER = 2 )
The User model got a conditional inline which shows the stocks of each supplier if the user role is equalled to supplier.(Here role is a PositiveSmallIntegerField with choices and SUPPLIER = 2)
class SupplierStockInline(admin.StackedInline):
""" Inline to show stocks of a supplier """
model = Stock
extra = 0
@admin.register(User)
class UserAdmin(UserAdmin):
""" User """
fieldsets = [
(None, {'fields': ('username', 'password')}),
('Personal info', {'fields': (
'first_name',
'last_name',
'email',
... some custom fields...
)}),
('Permissions', {'fields': (
'is_active',
'is_staff',
'is_superuser',
'role',
'groups',
'user_permissions',
)}),
('Important dates', {'fields': ('last_login', 'date_joined')})
]
list_display = [...]
search_fields = [...]
# --- the source of the problem ---
inlines = []
def get_inlines(self, request, obj):
""" Show inlines, stocks of supplier """
try:
if obj.role == SUPPLIER:
return [SupplierStockInline]
except:
pass
return []
# --- ---- -----
在我尝试将新用户的角色更改为供应商之前，此方法正常工作.
This works just fine till I tried to change the role of a new user to supplier.
ValidationError: ['ManagementForm data is missing or has been tampered with']
问题是由于覆盖 get_inlines() 方法.当我注释掉 get_inlines()时，它可以正常工作，并且仅在角色 supplier 中才发生.我试图解决这个问题，但无法提出解决方案.
The issue is due to that overridden get_inlines() method. When I comment out the get_inlines() it works fine and this is only happening for the role supplier. I tried to tackle this but unable to come up with a solution.
希望能为解决该问题提供指导.
Hoping for guidance to solve the issue, thanks in advance.
推荐答案
经过数小时的研究，终于找到了解决方案，尽管我无法确切解释为什么会发生这种情况(可能与没有相关的库存实例，以及当更换为角色供应商后突然与库存实例相关).
After hours of research finally found a solution, although I cannot exactly explain why it happening (might be related to not having related stock instances and suddenly having relations to stock instances when changed into role supplier).
无论如何，不是覆盖 get_inlines()方法，而是覆盖 change_view() ，并使用条件方法可以解决问题，
Anyway, instead of overriding the get_inlines() method, overriding change_view()and using a conditional approach can solve the problem,
class UserAdmin(admin.ModelAdmin):
...
inlines = []
def change_view(self, request, object_id, form_url='', extra_context=None):
self.inlines = []
try:
obj = self.model.objects.get(pk=object_id)
except self.model.DoesNotExist:
pass
else:
if obj.role == SUPPLIER:
self.inlines = [SupplierStockInline,]
return super(UserAdmin, self).change_view(request, object_id, form_url, extra_context)
这篇关于Django管理员错误ValidationError:['ManagementForm数据丢失或已被篡改']由于有条件的内联使用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！