must_be

Generates a list containing a single validation error message indicating that a specific option value must be of a required type.

def must_be(
    type: string,
    option: string,
    obj: object,
    id: string
) - > list

Generates a list containing a single Django system check error indicating that a specific configuration option must be of a certain type.

Parameters

Name	Type	Description
type	string	The expected data type name to be displayed in the error message.
option	string	The name of the configuration option or setting that failed the type validation.
obj	object	The object instance whose class will be referenced as the source of the error in the system check.
id	string	A unique identifier for the system check error, typically following the Django 'app_label.E001' format.

Returns

Type	Description
list	A list containing a single checks.Error object configured with the provided message, object context, and error identifier.