ModelForm API reference. For introductory material about using a
ModelForm, see the 从模型创建表单 topic guide.
Meta API¶The _meta API is used to build forms that reflect a Django model. It is
accessible through the _meta attribute of each model form, and is an
django.forms.models.ModelFormOptions instance.
The structure of the generated form can be customized by defining metadata
options as attributes of an inner Meta class. For example:
from django.forms import ModelForm
from myapp.models import Book
class BookForm(ModelForm):
class Meta:
model = Book
fields = ["title", "author"]
help_texts = {
"title": "The title of the book",
"author": "The author of the book",
}
# ... other attributes
Required attributes are model, and either
fields or exclude. All
other Meta attributes are optional.
Optional attributes, other than localized_fields and
formfield_callback, expect a dictionary that maps a
model field name to a value. Any field that is not defined in the dictionary
falls back to the field's default value.
Invalid field names
Invalid or excluded field names in an optional dictionary attribute have no effect, since fields that are not included are not accessed.
error_messages¶A dictionary that maps a model field name to a dictionary of error message
keys (null, blank, invalid, unique, etc.) mapped to custom
error messages.
When a field is not specified, Django will fall back on the error messages
defined in that model field's django.db.models.Field.error_messages
and then finally on the default error messages for that field type.
exclude¶A tuple or list of model field names to be
excluded from the form.
Either fields or
exclude must be set. If neither are set, an
ImproperlyConfigured exception will be
raised. If exclude is set and
fields is unset, all model fields, except for
those specified in exclude, are included in the
form.
field_classes¶A dictionary that maps a model field name to a Field
class, which overrides the form_class used in the model field's
Field.formfield() method.
When a field is not specified, Django will fall back on the model field's default field class.
fields¶A tuple or list of model field names to be
included in the form. The value '__all__' can be used to specify that
all fields should be included.
If any field is specified in exclude, this will
not be included in the form despite being specified in
fields.
Either fields or
exclude must be set. If neither are set, an
ImproperlyConfigured exception will be
raised.
formfield_callback¶A function or callable that takes a model field and returns a
django.forms.Field object.
help_texts¶labels¶A dictionary that maps a model field names to a label string.
When a field is not specified, Django will fall back on that model field's
verbose_name and then the field's attribute
name.
localized_fields¶A tuple or list of model field names to be
localized. The value '__all__' can be used to specify that all fields
should be localized.
By default, form fields are not localized, see enabling localization of fields for more details.
model¶Required. The django.db.models.Model to be used for the
ModelForm.
widgets¶A dictionary that maps a model field name to a
django.forms.Widget.
When a field is not specified, Django will fall back on the default widget
for that particular type of django.db.models.Field.
modelform_factory¶为给定的 model 返回一个 ModelForm 类。你可以选择性地传递一个 form 参数作为构建 ModelForm 的起点。
fields 是一个可选的字段名列表。如果提供，返回的字段中只包括命名的字段。
exclude 是一个可选的字段名列表。如果提供了这个列表，指定的字段将被排除在返回的字段之外，即使这些字段被列在 fields 参数中。
formfield_callback 是一个可调用的函数，它接收一个模型字段并返回一个表单字段。
widgets 是一个映射到部件的模型字段名的字典。
localized_fields 是一个应本地化的字段名称列表。
labels 是一个映射到标签的模型字段名的字典。
help_texts 是一个映射到帮助文本的模型字段名的字典。
error_messages 是一个模型字段名的字典，映射到错误信息的字典。
field_classes 是映射到表单字段类的模型字段名的字典。
见 ModelForm的工厂函数 的用法示例。
你必须通过关键字参数 fields 或 exclude 或表单内部 Meta 类的相应属性，明确地提供字段列表。更多信息参见 选择要使用的字段。忽略任何要使用的字段定义将引发 ImproperlyConfigured 异常。
modelformset_factory¶返回给定 model 类的 FormSet 类。
参数 model、form、fields、exclude、formfield_callback、widgets、localized_fields、labels、help_texts、error_messages、field_classes 都传给 modelform_factory()。
参数 formset、extra、can_delete、can_order、max_num、validate_max、min_num、validate_min、absolute_max、can_delete_extra 和 renderer 被传递给 formset_factory()。详情请见 表单集。
edit_only 参数允许 防止创建新对象。
见 模型表单集 的用法示例。
inlineformset_factory¶使用 modelformset_factory() 返回一个 InlineFormSet，默认值为 formset=BaseInlineFormSet、can_delete=True 和 extra=3。
如果你的模型有多个 ForeignKey 到 parent_model，你必须指定一个 fk_name。
参见 内联表单集 的用法示例。
11月 21, 2025