Python 如何禁用 django 表单中的模型字段
声明：本页面是StackOverFlow热门问题的中英对照翻译，遵循CC BY-SA 4.0协议，如果您需要使用它，必须同样遵循CC BY-SA许可，注明原文地址和作者信息，同时你必须将它归于原作者（不是我）：StackOverFlow
原文地址: http://stackoverflow.com/questions/4945802/
Warning: these are provided under cc-by-sa 4.0 license. You are free to use/share it, But you must attribute it to the original authors (not me):
StackOverFlow
How can I disable a model field in a django form
提问by jammon
I have a model like this:
我有一个这样的模型：
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
In a view I initialize one field and try to make it non-editable:
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
But the user can still change that field.
但是用户仍然可以更改该字段。
What's the real way to accomplish what I'm after?
实现我所追求的真正方法是什么？
采纳答案by Yuji 'Tomita' Tomita
Step 1: Disable the frontend widget
第 1 步：禁用前端小部件
Use the HTML readonlyattribute:
http://www.w3schools.com/tags/att_input_readonly.asp
使用 HTMLreadonly属性：http:
//www.w3schools.com/tags/att_input_readonly.asp
Or disabledattribute:
http://www.w3.org/TR/html401/interact/forms.html#adef-disabled
或disabled属性：http:
//www.w3.org/TR/html401/interact/forms.html#adef-disabled
You can inject arbitrary HTML key value pairs via the widget attrs property:
您可以通过小部件 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
Step 2: Ensure the field is effectively disabled on backend
第 2 步：确保该字段在后端被有效禁用
Override your clean method for your field so that regardless of POST input (somebody can fake a POST, edit the raw HTML, etc.) you get the field value that already exists.
覆盖您的字段的 clean 方法，以便无论 POST 输入如何（有人可以伪造 POST、编辑原始 HTML 等），您都会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
回答by darren
Have you tried using the exclude function?
您是否尝试过使用排除功能？
something like this
像这样的东西
class PartialAuthorForm(ModelForm):
class Meta:
model = Author
fields = ('name', 'title')
class PartialAuthorForm(ModelForm):
class Meta:
model = Author
exclude = ('birth_date',)
回答by T. Christiansen
Just customize the widget instance for the status field:
只需为状态字段自定义小部件实例：
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):
status = forms.CharField(widget=forms.TextInput(attrs={'readonly':'True'}))
class Meta:
model = models.MyModel
see: Django Documentation
请参阅：Django 文档
回答by xleon
From django 1.9:
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
回答by Rishabh
There is a very easy way of doing it:
有一个非常简单的方法：
class GenerateCertificate(models.Model):
field_name = models.CharField(
max_length=15,
editable=False)
def __unicode__(self):
return unicode(self.field_name)
The editable=Falsewill make the field disabled for editing.
该editable=False会为编辑禁止的领域。
