Reference Widgets

classRadioSelect[source] : - template_name: 'django/forms/widgets/radio.html' - option_template_name: 'django/forms/widgets/radio_option.html'

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Reference Conditional Expressions

When a conditional expression returns a boolean value, it is possible to use it directly in filters.

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Reference Constraints reference UniqueConstraint

UniqueConstraint.include A list or tuple of the names of the fields to be included in the covering unique index as non-key columns.

Reference Model index reference Index options

Index.include A list or tuple of the names of the fields to be included in the covering index as non-key columns.

Reference QuerySet API reference

Combines two QuerySets using the SQL AND operator in a manner similar to chaining filters. The following are equivalent: SQL equivalent:

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Reference QuerySet API reference

Combines two QuerySets using the SQL OR operator. The following are equivalent: SQL equivalent: | is not a commutative operation, as different (though equivalent) queries may be generated.

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Reference QuerySet API reference

Combines two QuerySets using the SQL XOR operator. A XOR expression matches rows that are matched by an odd number of operands. The following are equivalent: SQL equivalent: NOTE: XOR is natively supported on MariaDB and MySQL.

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Reference QuerySet API reference

count() acount() Asynchronous version: acount() Returns an integer representing the number of objects in the database matching the QuerySet.

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Reference QuerySet API reference

Case-insensitive exact match. If the value provided for comparison is None, it will be interpreted as an SQL NULL (see isnull for more details). Example: SQL equivalents: Note the first query will match 'Beatles Blog', 'beatles blog', 'BeAtLes BLoG', etc.

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Reference QuerySet API reference

For date and datetime fields, an exact year match. Allows chaining additional field lookups. Takes an integer year.

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Reference QuerySet API reference

For date and datetime fields, an exact month match. Allows chaining additional field lookups. Takes an integer 1 (January) through 12 (December).

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Reference QuerySet API reference

For date and datetime fields, an exact day match. Allows chaining additional field lookups. Takes an integer day.

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Reference QuerySet API reference

For datetime and time fields, an exact hour match. Allows chaining additional field lookups. Takes an integer between 0 and 23.

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Reference QuerySet API reference

For datetime and time fields, an exact minute match. Allows chaining additional field lookups. Takes an integer between 0 and 59.

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Reference QuerySet API reference

For datetime and time fields, an exact second match. Allows chaining additional field lookups. Takes an integer between 0 and 59.

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Reference QuerySet API reference

Takes either True or False, which correspond to SQL queries of IS NULL and IS NOT NULL, respectively. Example: SQL equivalent:

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Reference QuerySet API reference

Case-insensitive regular expression match. Example: SQL equivalents:

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Reference The Django template language: for Python programmers

The recommended way to create a Template is by calling the factory methods of the Engine: get_template(), select_template() and from_string(). In a Django project where the TEMPLATES setting defines a DjangoTemplates engine, it’s possible to instantiate a Template directly.

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Topic guide Password management

Argon2 is the winner of the 2015 Password Hashing Competition, a community organized open competition to select a next generation hashing algorithm.

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Topic guide Making queries

The QuerySet returned by all() describes all objects in the database table. Usually, though, you’ll need to select only a subset of the complete set of objects. To create such a subset, you refine the initial QuerySet, adding filter conditions.

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