我在我的 ModelAdmin
类中覆盖了 get_form()
:
def get_form(self, request, obj=None, **kwargs):
form = super(ModelAdmin, self).get_form(request, obj, **kwargs)
现在,如果我添加这一行:
print form.fields
我得到一个:
AttributeError: type object 'FilerImageForm' has no attribute 'fields'
为什么会这样?调用 super get_form()
是否应该在表单上设置 fields
属性?如果我弄错了,如何访问 ModelAdmin
类中的表单字段?
最佳答案
get_form
返回类而不是实例,fields
属性是实例属性。因此,您必须在访问字段之前实例化表单。
来自 django/contrib/admin/options.py 的定义:
def get_form(self, request, obj=None, **kwargs):
"""
Returns a Form class for use in the admin add view. This is used by
add_view and change_view.
"""
更新:
I need to intercept form field creation, not the view. I need to change a field's value, not mess with a template's context. I don't think add_view() is the appropriate place for this.
我认为你可以通过覆盖 formfield_for_dbfield
方法来做到这一点:
def formfield_for_dbfield(self, db_field, **kwargs):
"""
Hook for specifying the form Field instance for a given database Field
instance.
If kwargs are given, they're passed to the form Field's constructor.
"""
formfield = super(MyModelAdmin, self).formfield_for_dbfield(db_field, **kwargs)
if db_field.name == "field_you_are_looking_for":
# change formfield somehow here
# (or above, by passing modified kwargs in 'super' call)
return formfield
关于python - Django ModelAdmin get_form() 没有设置字段属性,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/22482591/