Question

Two scoops of Django建议为表单制作一个自定义验证器，如下所示：

class MyModel(models.Model):
    body = models.TextField()
    repo_name = models.CharField(max_length=50)


def validate_repo_existance(value):
     # Validate repo existance.
     # This needs the Github account which is bound 
     # to the user account though.


class MyModelForm(forms.ModelForm):
    def __init__(self, *args, **kwargs):
        super(MyModelForm, self).__init__(*args, **kwargs)
        self.fields["repo_name"].validators.append(validate_repo_existance)

    class Meta:
         model = MyModel

有没有办法将表单页面上的用户传递给自定义验证器？

Answer 1

class MyModelForm(forms.ModelForm):
    def __init__(self, user, *args, **kwargs):
        super(MyModelForm, self).__init__(*args, **kwargs)
        self.fields["repo_name"].validator.append(validate_repo_existance)

并从您实例化表单的视图中传递用户：

form = MyModelForm(request.user)  # when unbound

form = MyModelForm(request.user, data=request.POST)  # when bound

此模式用于您需要传递给Django表单的任何其他数据。

Answer 2

当前用户存储在请求对象中，可以使用request.user进行访问。您可以将此用户作为参数传递到表单中。

Answer 3

这就是我想要的：

views.py

form = MyModelForm(request.user)  # when unbound

form = MyModelForm(request.user, data=request.POST)  # when bound

validators.py

class RepoValidator(object):
    def __init__(self, user):
        self.user = user

    def __call__(self, value):
        #self.user and value are accessible from here

forms.py

class MyModelForm(forms.ModelForm):
    def __init__(self, user, *args, **kwargs):
        super(MyModelForm, self).__init__(*args, **kwargs)
        self.fields["repo_name"].validators.append(RepoValidator(user))

    class Meta:
         model = MyModel

如何将当前用户传递给自定义表单验证器？

3 个答案: