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… (GDALBand method) - date - field lookup type - template filter - date_attrs (SplitDateTimeWidget attribute) - date_field (DateMixin attribute) - DATE_FORMAT - setting - date_format (SplitDateTimeWidget attribute) - date_hierarchy (ModelAdmin attribute) - DATE_INPUT_FORMATS - setting - date_joined (models.User attribute) - …

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… - GDALException - GDALRaster (class in django.contrib.gis.gdal) - generate_filename() (Storage method) - GeneratedField (class in django.db.models) - generic view - generic_inlineformset_factory() (in module django.contrib.contenttypes.forms) - GenericForeignKey (class in django.contrib.contenttypes.fields) - GenericInlineModelAdmin (class in django.contrib.contenttypes.admin) - GenericIPAddressField (class in django.db.models) - …

Reference Form fields Core field arguments

Field.validators The validators argument lets you provide a list of validation functions for this field. See the validators documentation for more information.

Topic guide Formsets Formset validation

BaseFormSet has a couple of methods that are closely related to the ManagementForm, total_form_count and initial_form_count. total_form_count returns the total number of forms in this formset.

Topic guide Formsets Formset validation

BaseFormSet provides an additional attribute empty_form which returns a form instance with a prefix of __prefix__ for easier use in dynamic forms with JavaScript.

Reference Form fields

Naturally, the forms library comes with a set of Field classes that represent common validation needs. This section documents each built-in field. For each field, we describe the default widget used if you don’t specify widget.

Reference Form fields Built-in Field classes

classNullBooleanField(**kwargs) : - Default widget: NullBooleanSelect - Empty value: None - Normalizes to: A Python True, False or None value. - Validates nothing (i.e., it never raises a ValidationError).

Reference Form fields Built-in Field classes

classCharField(**kwargs) : - Default widget: TextInput - Empty value: Whatever you’ve given as empty_value. - Normalizes to: A string. - Uses MaxLengthValidator and MinLengthValidator if max_length and min_length are provided. Otherwise, all inputs are valid.

Reference Form fields Built-in Field classes

classIntegerField(**kwargs) : - Default widget: NumberInput when Field.localize is False, else TextInput. - Empty value: None - Normalizes to: A Python integer. - Validates that the given value is an integer.

Reference Form fields Built-in Field classes

classRegexField(**kwargs) : - Default widget: TextInput - Empty value: Whatever you’ve given as empty_value. - Normalizes to: A string. - Uses RegexValidator to validate that the given value matches a certain regular expression. - Error message keys: required, invalid

Reference Form fields Built-in Field classes

classTypedChoiceField(**kwargs) : Just like a ChoiceField, except TypedChoiceField takes two extra arguments, coerce and empty_value.

Reference Form fields Core field arguments

Field.error_messages The error_messages argument lets you override the default messages that the field will raise. Pass in a dictionary with keys matching the error messages you want to override.

Reference Form fields Slightly complex built-in Field classes

classComboField(**kwargs) : - Default widget: TextInput - Empty value: '' (an empty string) - Normalizes to: A string. - Validates the given value against each of the fields specified as an argument to the ComboField.

Reference Form fields Slightly complex built-in Field classes

classMultiValueField(fields=(),**kwargs) : - Default widget: TextInput - Empty value: '' (an empty string) - Normalizes to: the type returned by the compress method of the subclass.

Reference Form fields Built-in Field classes

classJSONField(encoder=None,decoder=None,**kwargs) : A field which accepts JSON encoded data for a JSONField.

Topic guide Formsets Formset validation

You may have noticed the additional data (form-TOTAL_FORMS, form-INITIAL_FORMS) that was required in the formset’s data above. This data is required for the ManagementForm.

Topic guide Formsets Formset validation

The error_messages argument lets you override the default messages that the formset will raise. Pass in a dictionary with keys matching the error messages you want to override. Error message keys include 'too_few_forms', 'too_many_forms', and 'missing_management_form'.

Release notes Django 3.2.19 release notes

Uploading multiple files using one form field has never been supported by forms.FileField or forms.ImageField as only the last uploaded file was validated. Unfortunately, Uploading multiple files topic suggested otherwise.

Release notes Django 4.1.9 release notes

Uploading multiple files using one form field has never been supported by forms.FileField or forms.ImageField as only the last uploaded file was validated. Unfortunately, Uploading multiple files topic suggested otherwise.