Reference Form fields

classBooleanField(**kwargs)[source] : - Default widget: CheckboxInput - Empty value: False - Normalizes to: A Python True or False value. - Validates that the value is True (e.g. the check box is checked) if the field has required=True.

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Reference Form fields

- Can validate that non-empty file data has been bound to the form. - Error message keys: required, invalid, missing, empty, max_length

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Topic guide Format localization

For country specific form fields, validation, and data formats that are not included in Django itself, consider using the django-localflavor package, which provides localized form fields and utilities for many countries and regions (documentation).

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Reference Form fields Built-in Field classes

classBooleanField(**kwargs)[source] : - Default widget: CheckboxInput - Empty value: False - Normalizes to: A Python True or False value. - Validates that the value is True (e.g. the check box is checked) if the field has required=True.

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Reference Form fields Built-in Field classes

- Can validate that non-empty file data has been bound to the form. - Error message keys: required, invalid, missing, empty, max_length

4.2 5.0 5.1 5.2 6.0

Topic guide Form handling with class-based views

Generic views really shine when working with models. These generic views will automatically create a ModelForm, so long as they can work out which model class to use: If the model attribute is given, that model class will be used.

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Topic guide Form handling with class-based views

Generic views really shine when working with models. These generic views will automatically create a ModelForm, so long as they can work out which model class to use: If the model attribute is given, that model class will be used.

4.2 5.0 5.1 5.2 6.0

Reference Django exceptions

NON_FIELD_ERRORS ValidationErrors that don’t belong to a particular field in a form or model are classified as NON_FIELD_ERRORS. This constant is used as a key in dictionaries that otherwise map fields to their respective list of errors.

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Reference Django Exceptions Django Core ExceptionsValidationError

NON_FIELD_ERRORS ValidationErrors that don’t belong to a particular field in a form or model are classified as NON_FIELD_ERRORS. This constant is used as a key in dictionaries that otherwise map fields to their respective list of errors.

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Topic guide Creating forms from models ModelFormValidation on a ModelForm

Error messages defined at the form field level or at the form Meta level always take precedence over the error messages defined at the model field level.

4.2 5.0 5.1 5.2 6.0

Topic guide Using the Django authentication system Authentication in web requests

classBaseUserCreationForm[source] : A ModelForm for creating a new user. This is the recommended base class if you need to customize the user creation form. classPasswordChangeForm[source] : A form for allowing a user to change their password.

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Reference The Forms API

A Form instance is either bound to a set of data, or unbound. If it’s bound to a set of data, it’s capable of validating that data and rendering the form as HTML with the data displayed in the HTML.

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Topic guide Creating forms from models

You can override the clean() method on a model form to provide additional validation in the same way you can on a normal form.

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Reference The Forms API

A Form instance is either bound to a set of data, or unbound. If it’s bound to a set of data, it’s capable of validating that data and rendering the form as HTML with the data displayed in the HTML.

4.2 5.0 5.1 5.2 6.0

Topic guide Creating forms from models ModelFormValidation on a ModelForm

You can override the clean() method on a model form to provide additional validation in the same way you can on a normal form.

4.2 5.0 5.1 5.2 6.0

Reference The Django admin site

ModelAdmin.formfield_for_manytomany(db_field,request,**kwargs) : Like the formfield_for_foreignkey method, the formfield_for_manytomany method can be overridden to change the default formfield for a many to many field.

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Reference PostgreSQL specific form fields and widgets

classSplitArrayField(base_field,size,remove_trailing_nulls=False) : This field handles arrays by reproducing the underlying field a fixed number of times.

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Reference PostgreSQL specific form fields and widgets Fields

classSplitArrayField(base_field,size,remove_trailing_nulls=False) : This field handles arrays by reproducing the underlying field a fixed number of times.

4.2 5.0 5.1 5.2 6.0

Topic guide Creating forms from models

Error messages defined at the form field level ( django.forms.Field.error_messages) or at the form Meta level always take precedence over the error messages defined at the model field level (django.db.models.Field.error_messages).

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Reference Validators

A validator is a callable that takes a value and raises a ValidationError if it doesn’t meet some criteria. Validators can be useful for reusing validation logic between different types of fields.

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