django Widgets

Widgets¶

A widget is Django’s representation of a HTML input element. The widget handles the rendering of the HTML, and the extraction of data from a GET/POST dictionary that corresponds to the widget.

Django provides a representation of all the basic HTML widgets, plus some commonly used groups of widgets:

<!-- [django.forms.TextInput]-->class TextInput ¶

Text input: <input type='text' ...>

<!-- [django.forms.PasswordInput]-->class PasswordInput ¶

Password input: <input type='password' ...>

Takes one optional argument:

<!-- [django.forms.PasswordInput.render_value]-->render_value ¶

Determines whether the widget will have a value filled in when the form is re-displayed after a validation error (default is True ).

<!-- [django.forms.HiddenInput]-->class HiddenInput ¶

Hidden input: <input type='hidden' ...>

<!-- [django.forms.MultipleHiddenInput]-->class MultipleHiddenInput ¶

Multiple <input type='hidden' ...> widgets.

<!-- [django.forms.FileInput]-->class FileInput ¶

File upload input: <input type='file' ...>

<!-- [django.forms.DateInput]-->class DateInput ¶

New in Django 1.1: Please, see the release notes

Date input as a simple text box: <input type='text' ...>

Takes one optional argument:

<!-- [django.forms.DateInput.format]-->format ¶

The format in which this field’s initial value will be displayed.

If no format argument is provided, the default format is '%Y-%m-%d' .

<!-- [django.forms.DateTimeInput]-->class DateTimeInput ¶

New in Django 1.0: Please, see the release notes

Date/time input as a simple text box: <input type='text' ...>

Takes one optional argument:

<!-- [django.forms.DateTimeInput.format]-->format ¶

The format in which this field’s initial value will be displayed.

If no format argument is provided, the default format is '%Y-%m-%d %H:%M:%S' .

<!-- [django.forms.TimeInput]-->class TimeInput ¶

Time input as a simple text box: <input type='text' ...>

Takes one optional argument:

<!-- [django.forms.TimeInput.format]-->format ¶

The format in which this field’s initial value will be displayed.

If no format argument is provided, the default format is '%H:%M:%S' .

Changed in Django 1.1: The format argument was not supported in Django 1.0.

<!-- [django.forms.Textarea]-->class Textarea ¶

Text area: <textarea>...</textarea>

<!-- [django.forms.CheckboxInput]-->class CheckboxInput ¶

Checkbox: <input type='checkbox' ...>

Takes one optional argument:

<!-- [django.forms.CheckboxInput.check_test]-->check_test ¶

A callable that takes the value of the CheckBoxInput and returns True if the checkbox should be checked for that value.

<!-- [django.forms.Select]-->class Select ¶

Select widget: <select><option ...>...</select>

Requires that your field provides choices .

<!-- [django.forms.NullBooleanSelect]-->class NullBooleanSelect ¶

Select widget with options ‘Unknown’, ‘Yes’ and ‘No’

<!-- [django.forms.SelectMultiple]-->class SelectMultiple ¶

Select widget allowing multiple selection: <select multiple='multiple'>...</select>

Requires that your field provides choices .

<!-- [django.forms.RadioSelect]-->class RadioSelect ¶

A list of radio buttons:

<ul>
  <li><input type='radio' ...></li>
  ...
</ul>

Requires that your field provides choices .

<!-- [django.forms.CheckboxSelectMultiple]-->class CheckboxSelectMultiple ¶

A list of checkboxes:

<ul>
  <li><input type='checkbox' ...></li>
  ...
</ul>

<!-- [django.forms.MultiWidget]-->class MultiWidget ¶

Wrapper around multiple other widgets

<!-- [django.forms.SplitDateTimeWidget]-->class SplitDateTimeWidget ¶

Wrapper around two widgets: DateInput for the date, and TimeInput for the time.

Takes two optional arguments, date_format and time_format , which work just like the format argument for DateInput and TimeInput .

Changed in Django 1.1: The date_format and time_format arguments were not supported in Django 1.0.

<!-- [django.forms.SelectDateWidget]-->class SelectDateWidget ¶

Wrapper around three select widgets: one each for month, day, and year. Note that this widget lives in a separate file from the standard widgets.

from
 django.forms.extras.widgets
 import
 SelectDateWidget


date
 =
 forms
.
DateField
(
widget
=
SelectDateWidget
())

Specifying widgets¶

<!-- [django.forms.Form.widget]-->Form. widget ¶

Whenever you specify a field on a form, Django will use a default widget that is appropriate to the type of data that is to be displayed. To find which widget is used on which field, see the documentation for the built-in Field classes.

However, if you want to use a different widget for a field, you can - just use the 'widget' argument on the field definition. For example:

from
 django
 import
 forms


class
 CommentForm
(
forms
.
Form
):

    name
 =
 forms
.
CharField
()

    url
 =
 forms
.
URLField
()

    comment
 =
 forms
.
CharField
(
widget
=
forms
.
Textarea
)

This would specify a form with a comment that uses a larger Textarea widget, rather than the default TextInput widget.

Customizing widget instances¶

When Django renders a widget as HTML, it only renders the bare minimum HTML - Django doesn't add a class definition, or any other widget-specific attributes. This means that all 'TextInput' widgets will appear the same on your web page.

If you want to make one widget look different to another, you need to specify additional attributes for each widget. When you specify a widget, you can provide a list of attributes that will be added to the rendered HTML for the widget.

For example, take the following simple form:

class
 CommentForm
(
forms
.
Form
):

    name
 =
 forms
.
CharField
()

    url
 =
 forms
.
URLField
()

    comment
 =
 forms
.
CharField
()

This form will include three default TextInput widgets, with default rendering - no CSS class, no extra attributes. This means that the input boxes provided for each widget will be rendered exactly the same:

>>> 
f
 =
 CommentForm
(
auto_id
=
False
)

>>> 
f
.
as_table
()

<tr><th>Name:</th><td><input type="text" name="name" /></td></tr>

<tr><th>Url:</th><td><input type="text" name="url"/></td></tr>

<tr><th>Comment:</th><td><input type="text" name="comment" /></td></tr>

On a real web page, you probably don't want every widget to look the same. You might want a larger input element for the comment, and you might want the 'name' widget to have some special CSS class. To do this, you use the attrs argument when creating the widget:

<!-- [django.forms.Widget.attrs]-->Widget. attrs ¶

For example:

class
 CommentForm
(
forms
.
Form
):

    name
 =
 forms
.
CharField
(

                widget
=
forms
.
TextInput
(
attrs
=
{
'class'
:
'special'
}))

    url
 =
 forms
.
URLField
()

    comment
 =
 forms
.
CharField
(

               widget
=
forms
.
TextInput
(
attrs
=
{
'size'
:
'40'
}))

Django will then include the extra attributes in the rendered output:

>>> 
f
 =
 CommentForm
(
auto_id
=
False
)

>>> 
f
.
as_table
()

<tr><th>Name:</th><td><input type="text" name="name" class="special"/></td></tr>

<tr><th>Url:</th><td><input type="text" name="url"/></td></tr>

<tr><th>Comment:</th><td><input type="text" name="comment" size="40"/></td></tr>