如何禁用django表单中的模型字段

Question

我有这样的模型:

class MyModel(models.Model):
    REGULAR = 1
    PREMIUM = 2
    STATUS_CHOICES = ((REGULAR, "regular"), (PREMIUM, "premium"))
    name = models.CharField(max_length=30)
    status = models.IntegerField(choices = STATUS_CHOICES, default = REGULAR)

class MyForm(forms.ModelForm):
    class Meta:
        model = models.MyModel

在视图中,我初始化一个字段并尝试使其不可编辑:

myform = MyForm(initial = {'status': requested_status})
myform.fields['status'].editable = False

但是用户仍然可以更改该字段.

什么是实现我追求的真正方式？

Answer 1

第1步:禁用前端窗口小部件

使用HTML readonly属性:http:
//www.w3schools.com/tags/att_input_readonly.asp

或disabled属性:http:
//www.w3.org/TR/html401/interact/forms.html#adef-disabled

您可以通过widget attrs属性注入任意HTML键值对:

myform.fields['status'].widget.attrs['readonly'] = True # text input
myform.fields['status'].widget.attrs['disabled'] = True # radio / checkbox

步骤2:确保在后端有效禁用该字段

覆盖您的字段的干净方法,以便无论POST输入(有人可以伪造POST,编辑原始HTML等),您都可以获得已存在的字段值.

def clean_status(self):
    # when field is cleaned, we always return the existing model field.
    return self.instance.status

Answer 2

从 Django 1.9 开始：

from django.forms import Textarea

class MyModelForm(forms.ModelForm):
    class Meta:
        model = MyModel
        fields = '__all__'
        widgets = {'my_field_in_my_model': Textarea(attrs={'cols':80,'rows':1}),}             

    def __init__(self, *args, **kwargs):
        super().__init__(*args, **kwargs)
        self.fields['my_field_in_my_model'].disabled = True

Answer 3

您是否尝试过使用排除功能？

这样的事情

class PartialAuthorForm(ModelForm):
class Meta:
    model = Author
    fields = ('name', 'title')

class PartialAuthorForm(ModelForm):
class Meta:
    model = Author
    exclude = ('birth_date',)

参考这里