The first element in each tuple is the actual value to be set on the model, and the second element is the human-readable name.
That way, you may display dates in the format chosen by the user throughout the site.
Now, if the site contains many forms with date fields (say, for example, you're building a calendar application), it can be a bit repetitive and annoying to check and assign the date format for every form in every view. It all happens in the following class: What this class does is explore what's in the form, and make sure that all date fields will display and validate with the given date format.
"1pm" or ""), or, in fact, with any kind of validation that needs to be operated on a large number of forms in your site and where that validation also depends on the user's preferences.
Are you getting validation errors when you try to filter a Date Time Field by today’s date?
If you need to cleanup orphaned files, you’ll need to handle it yourself (for instance, with a custom management command that can be run manually or scheduled to run periodically via e.g. , it will be invoked every time a new form is instantiated.
It may also be invoked when a model is validated, for example by management commands or the admin.The second element is an iterable of 2-tuples, with each 2-tuple containing a value and a human-readable name for an option.Grouped options may be combined with ungrouped options within a single list (such as the The name of the database column to use for this field.If this isn’t given, Django will use the field’s name.If your database column name is an SQL reserved word, or contains characters that aren’t allowed in Python variable names – notably, the hyphen – that’s OK.If in doubt, leave it to its default of Behind the scenes, Django creates an intermediary join table to represent the many-to-many relationship.