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searxng/docs/dev/engines/offline/nosql-engines.rst
Markus Heiser 5720844fcd [doc] rearranges Settings & Engines docs for better readability
We have built up detailed documentation of the *settings* and the *engines* over
the past few years.  However, this documentation was still spread over various
chapters and was difficult to navigate in its entirety.

This patch rearranges the Settings & Engines documentation for better
readability.

To review new ordered docs::

   make docs.clean docs.live

Signed-off-by: Markus Heiser <markus.heiser@darmarit.de>
2023-07-01 22:45:19 +02:00

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.. _nosql engines:
===============
NoSQL databases
===============
.. sidebar:: further read
- `NoSQL databases <https://en.wikipedia.org/wiki/NoSQL>`_
- `redis.io <https://redis.io/>`_
- `MongoDB <https://www.mongodb.com>`_
.. contents::
:depth: 2
:local:
:backlinks: entry
.. sidebar:: info
Initial sponsored by `Search and Discovery Fund
<https://nlnet.nl/discovery>`_ of `NLnet Foundation <https://nlnet.nl/>`_.
The following `NoSQL databases`_ are supported:
- :ref:`engine redis_server`
- :ref:`engine mongodb`
All of the engines above are just commented out in the :origin:`settings.yml
<searx/settings.yml>`, as you have to set various options and install
dependencies before using them.
By default, the engines use the ``key-value`` template for displaying results /
see :origin:`simple <searx/templates/simple/result_templates/key-value.html>`
theme. If you are not satisfied with the original result layout, you can use
your own template, set ``result_template`` attribute to ``{template_name}`` and
place the templates at::
searx/templates/{theme_name}/result_templates/{template_name}
Furthermore, if you do not wish to expose these engines on a public instance, you
can still add them and limit the access by setting ``tokens`` as described in
section :ref:`private engines`.
Extra Dependencies
==================
For using :ref:`engine redis_server` or :ref:`engine mongodb` you need to
install additional packages in Python's Virtual Environment of your SearXNG
instance. To switch into the environment (:ref:`searxng-src`) you can use
:ref:`searxng.sh`::
$ sudo utils/searxng.sh instance cmd bash
(searxng-pyenv)$ pip install ...
Configure the engines
=====================
`NoSQL databases`_ are used for storing arbitrary data without first defining
their structure.
.. _engine redis_server:
Redis Server
------------
.. _redis: https://github.com/andymccurdy/redis-py#installation
.. sidebar:: info
- ``pip install`` redis_
- redis.io_
- :origin:`redis_server.py <searx/engines/redis_server.py>`
.. automodule:: searx.engines.redis_server
:members:
.. _engine mongodb:
MongoDB
-------
.. _pymongo: https://github.com/mongodb/mongo-python-driver#installation
.. sidebar:: info
- ``pip install`` pymongo_
- MongoDB_
- :origin:`mongodb.py <searx/engines/mongodb.py>`
.. automodule:: searx.engines.mongodb
:members: