Question

使用django ModelForm上我的初步课程，我想让用户能够在博客中修改条目。BlogEntry有一个date,postedTime, title and content。我想向用户展示一个editform，显示所有这些字段，但只显示title and content as editable。 date and postedTime should be shown as uneditable。

class BlogEntry(models.Model):
   title = models.CharField(unique=True,max_length=50)
   description = models.TextField(blank=True)
   date = models.DateField(default=datetime.date.today)
   postedTime = models.TimeField(null=True)

...

为了添加条目，我以正常方式使用ModelForm ..

class BlogEntryAddForm(ModelForm):
    class Meta:
        model = BlogEntry
...

但是如何创建编辑表单？我希望它show the date,postedTime as uneditable（但仍然在表单上显示）并让用户编辑title and description。

如果我使用exclude in class Meta作为日期和过去时间，则会导致它们不显示在表单上。那么，我怎样才能将它们显示为不可编辑的？

class BlogEntryEditForm(ModelForm):
    class Meta:
        model = BlogEntry
        ...?...

Answer 1

在表单对象中，将字段的属性声明为readonly：

form.fields['field'].widget.attrs['readonly'] = True

Answer 2

date字段是表示条目首次创建时还是上次修改时的日期？如果先使用auto_now_add选项，请使用auto_now。那就是：

date = models.DateField(auto_now_add=True)

将在创建条目时将date设置为现在。

auto_now_add使字段不可编辑。对于其他情况，请使用editable选项使任何字段无法使用。例如

postedDate = models.TimeField(null=True, editable=False)

此外，您可能会将posted布尔字段添加到Entry模型，因此在auto_now上设置postedDate非常方便。每当您将postedDate设置为posted时，每次修改条目时都会将True设置为现在。

Answer 3

我是这样实现的：https://djangosnippets.org/snippets/10514/ 此实现使用模型实例的数据用于所有只读字段，而不是处理表单时获得的数据

在相同的代码下方，但使用他的示例

from __future__ import unicode_literals

from django.utils import six
from django.utils.encoding import force_str

__all__ = (
    'ReadOnlyFieldsMixin',
    'new_readonly_form_class'
)


class ReadOnlyFieldsMixin(object):
    """Usage:
    class MyFormAllFieldsReadOnly(ReadOnlyFieldsMixin, forms.Form):
        ...


    class MyFormSelectedFieldsReadOnly(ReadOnlyFieldsMixin, forms.Form):
        readonly_fields = ('field1', 'field2')
        ...
    """
    readonly_fields = ()

    def __init__(self, *args, **kwargs):
        super(ReadOnlyFieldsMixin, self).__init__(*args, **kwargs)
        self.define_readonly_fields(self.fields)

    def clean(self):
        cleaned_data = super(ReadOnlyFieldsMixin, self).clean()

        for field_name, field in six.iteritems(self.fields):
            if self._must_be_readonly(field_name):
                cleaned_data[field_name] = getattr(self.instance, field_name)

        return cleaned_data

    def define_readonly_fields(self, field_list):

        fields = [field for field_name, field in six.iteritems(field_list)
                  if self._must_be_readonly(field_name)]

        map(lambda field: self._set_readonly(field), fields)

    def _all_fields(self):
        return not bool(self.readonly_fields)

    def _set_readonly(self, field):
        field.widget.attrs['disabled'] = 'true'
        field.required = False

    def _must_be_readonly(self, field_name):
        return field_name in self.readonly_fields or self._all_fields()


def new_readonly_form_class(form_class, readonly_fields=()):
    name = force_str("ReadOnly{}".format(form_class.__name__))
    class_fields = {'readonly_fields': readonly_fields}
    return type(name, (ReadOnlyFieldsMixin, form_class), class_fields)

用法：

class BlogEntry(models.Model):
    title = models.CharField(unique=True,max_length=50)
    description = models.TextField(blank=True)
    date = models.DateField(default=datetime.date.today)
    postedTime = models.TimeField(null=True)


# all fields are readonly    
class BlogEntryReadOnlyForm(ReadOnlyFieldsMixin, forms.ModelForm):
    class Meta:
        model = BlogEntry

# selected fields are readonly
class BlogEntryReadOnlyForm2(ReadOnlyFieldsMixin, forms.ModelForm):
    readonly_fields = ('date', 'postedTime')
    class Meta:
        model = BlogEntry

或使用函数

class BlogEntryForm(forms.ModelForm):
    class Meta:
        model = BlogEntry

BlogEntryFormReadOnlyForm = new_readonly_form_class(BlogEntryForm, readonly_fields=('description', ))

Answer 4

这可以防止任何用户破解请求：

self.fields['is_admin'].disabled = True

自定义表单示例：

class MemberShipInlineForm(forms.ModelForm):
    is_admin = forms.BooleanField(required=False)

    def __init__(self, *args, **kwargs):

        super(MemberShipInlineForm, self).__init__(*args, **kwargs)

        if 'instance' in kwargs and kwargs['instance'].is_group_creator:
            self.fields['is_admin'].disabled = True

    class Meta:
        model = MemberShip
        fields = '__all__'

Answer 5

来自documentation，

class BlogEntryEditForm(ModelForm):
    class Meta:
    model = BlogEntry
    readonly_fields = ['date','postedTime']

如何将django ModelForm字段显示为不可编辑

5 个答案:

用法：

或使用函数