reading-notes

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Django Forms

• Django’s form handling uses all of the same techniques that we learned about in previous tutorials (for displaying information about our models)
• The view gets a request, performs any actions required including reading data from the models, then generates and returns an HTML page (from a template, into which we pass a context containing the data to be displayed).
• What makes things more complicated is that the server also needs to be able to process data provided by the user, and redisplay the page if there are any errors.

• The declaration syntax for a Form is very similar to that for declaring a Model,

• required: If True, the field may not be left blank or given a None value. Fields are required by default, so you would set required=False to allow blank values in the form.
• label: The label to use when rendering the field in HTML. If a label is not specified, Django will create one from the field name by capitalizing the first letter and replacing underscores with spaces (e.g. Renewal date).
• label_suffix: By default, a colon is displayed after the label (e.g. Renewal date:). This argument allows you to specify a different suffix containing other character(s). initial: The initial value for the field when the form is displayed.
• widget: The display widget to use.
• help_text (as seen in the example above): Additional text that can be displayed in forms to explain how to use the field.
• error_messages: A list of error messages for the field. You can override these with your own messages if needed.
• validators: A list of functions that will be called on the field when it is validated.
• localize: Enables the localization of form data input (see link for more information).
• disabled: The field is displayed but its value cannot be edited if this is True. The default is False.

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