试图获取要在表单中使用的request.user时未定义名称

Question

我知道这个问题被问了很多次，但我在stackoverflow中发布的解决方案中不断遇到同样的错误。我可能犯了一个简单的错误，但作为一个初学者，我不知道我的错误在哪里

这是我的表格。py：

from django import forms
from .models import *

class AddMark(forms.Form):

    def __init__(self, user, *args, **kwargs):
        self.user = user
        super(AddMark, self).__init__(*args, **kwargs)      
    
    teacher = Teacher.objects.filter(user = self.user)[:1]
    modules = Module.objects.filter(enseignants__in = (teacher))

    desc = forms.CharField(label='Description')
    coef = forms.FloatField(label='Coefficient')
    max_mark = forms.FloatField(label='Max Mark')
    module = forms.ChoiceField(label='Module',choices=modules)

似乎错误来自于

    teacher = Teacher.objects.filter(user = self.user)[:1]

Answer 1

试试这个：

def __init__(self, user, *args, **kwargs):
    user = user
    super(AddMark, self).__init__(*args, **kwargs) 

Answer 2

问题是，您在具有该信息的方法之外引用self.user

如果要在提交表单时执行这些操作，可能应该将它们放在is_valid（）方法中

class AddMark(forms.Form):
    def __init__(self, user, *args, **kwargs):
        self.user = user
        super(AddMark, self).__init__(*args, **kwargs)      

    def is_valid(self):
        teacher = Teacher.objects.filter(user = self.user)[:1]
        modules = Module.objects.filter(enseignants__in = (teacher))

当我有疑问的时候，我总是觉得在github上查看django的源代码很有帮助，它确实可以消除围绕其类的许多神秘感！ https://github.com/django/django/blob/f5e5aac59ebbcea46b98d37834915de0f43d7cc8/django/forms/forms.py#L22