在 django admin 中使用change_view向 ModelForm 构造函数添加额外的参数

发布于 2024-10-08 18:38:33 字数 725 浏览 1 评论 0原文

我希望能够在 django admins clean() 方法中访问请求对象。我如何自定义此让用户从管理验证类使用 django admins modelform

我需要进行什么样的修改到下面的 change_view ，

def change_view(self, request, object_id, extra_context=None):
    self.form = GroupForm
    result = super(GroupsAdmin, self).change_view(request, object_id, extra_context)

    return result

以便它调用下面具有 request 参数的构造函数

class GroupForm(forms.ModelForm):
    class Meta:
        model = Group

    def __init__(self, *args, **kwargs):
        self.request = kwargs.pop('request', None)
        super(GroupForm, self).__init__(*args, **kwargs)

原文

I would like to be able to access request object in django admins clean() method. How can I customize this getting the user from a admin validation class to work with django admins modelform

What kind of modification do i need to make to change_view below

def change_view(self, request, object_id, extra_context=None):
    self.form = GroupForm
    result = super(GroupsAdmin, self).change_view(request, object_id, extra_context)

    return result

so that it calls the constructor below which has the request argument

class GroupForm(forms.ModelForm):
    class Meta:
        model = Group

    def __init__(self, *args, **kwargs):
        self.request = kwargs.pop('request', None)
        super(GroupForm, self).__init__(*args, **kwargs)

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熊抱啵儿 2024-10-15 18:38:33

鉴于没有为此提供答案，我想我应该强调我是如何解决这个问题的，以防其他人可能会发现该信息有用。

我最终通过定义自定义中间件并使用 ThreadLocals 解决了这个问题。

首先在 forms.py 中定义一个 ThreadLocals 类，如下所示

import threading
_thread_locals = threading.local()

class ThreadLocals(object):
    """
    Middleware that gets various objects from the
    request object and saves them in thread local storage.
    """
    def process_request(self, request):
        _thread_locals.request = request

然后在 settings.py 中确保启用中间件

MIDDLEWARE_CLASSES = (
    'myproject.myapp.forms.ThreadLocals',
)

最后访问请求对象就像这样简单

class GroupForm(forms.ModelForm):
    class Meta:
        model = Group

        def clean(self):
            cleaned_data = super(GroupForm, self).clean()
            self.request = _thread_locals.request

Seeing as no answer was ever provided for this, I figured I should highlight how I resolved this just in case someone else might find the info useful.

I eventually solved this on defining a custom middleware and using ThreadLocals.

First define a ThreadLocals class in your forms.py as shown below

import threading
_thread_locals = threading.local()

class ThreadLocals(object):
    """
    Middleware that gets various objects from the
    request object and saves them in thread local storage.
    """
    def process_request(self, request):
        _thread_locals.request = request

Then in your settings.py make sure to enable the middleware

MIDDLEWARE_CLASSES = (
    'myproject.myapp.forms.ThreadLocals',
)

And finally accessing the request object is as easy as

class GroupForm(forms.ModelForm):
    class Meta:
        model = Group

        def clean(self):
            cleaned_data = super(GroupForm, self).clean()
            self.request = _thread_locals.request

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