Operations
==========

Sometimes more sophisticated filtering operations
are needed such as getting items that are greater
than, less than etc. by specific field. For such
purpose, Red Bird provide operations:

- ``greater_than``
- ``less_than``
- ``not_equal``
- ``between``
- ``in_``

Examples
--------

.. code-block:: python

    from redbird.oper import greater_than, less_than, not_equal

    repo.filter_by(age=greater_than(30))

    repo.filter_by(age=less_than(30))

    repo.filter_by(age=not_equal(30))

.. code-block:: python

    from redbird.oper import between, in_

    repo.filter_by(age=between(20, 40))

    repo.filter_by(age=in_([20, 40]))