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This moves lots of pages around. The high-level changes are * Better main sections, so it's more *general*, *into*, *basics* and *details* * Move more general topics to a *Basic* section, which are not app-specific * Remove app docs to the stuff that is likely used, anything else goes into "Digging deeper" * Move general guides into a prologue * Try to *compress*/combine some pages with similar content * Try to have better consistencs on level ob abstraction across pages * Split app development and maintenance pages into two sections * Integrate bugtracker info into prologue * Integrate Android pages into client APIs section Signed-off-by: Christoph Wurst <christoph@winzerhof-wurst.at>
57 lines
1.8 KiB
ReStructuredText
57 lines
1.8 KiB
ReStructuredText
============================
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Database schema (deprecated)
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============================
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.. warning:: Using the database.xml schema file is deprecated.
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You should migrate to using :ref:`Database Migrations <app_db_migrations>`.
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.. sectionauthor:: Bernhard Posselt <dev@bernhard-posselt.com>
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Nextcloud uses a database abstraction layer on top of either PDO, depending on the availability of PDO on the server.
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The database schema is inside :file:`appinfo/database.xml` in MDB2's `XML scheme notation <http://www.wiltonhotel.com/_ext/pear/docs/MDB2/docs/xml_schema_documentation.html>`_ where the placeholders \*dbprefix* (\*PREFIX* in your SQL) and \*dbname* can be used for the configured database table prefix and database name.
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An example database XML file would look like this:
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.. code-block:: xml
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<?xml version="1.0" encoding="UTF-8" ?>
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<database>
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<name>*dbname*</name>
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<create>true</create>
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<overwrite>false</overwrite>
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<charset>utf8</charset>
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<table>
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<name>*dbprefix*yourapp_items</name>
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<declaration>
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<field>
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<name>id</name>
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<type>integer</type>
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<default>0</default>
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<notnull>true</notnull>
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<autoincrement>1</autoincrement>
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<length>4</length>
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</field>
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<field>
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<name>user</name>
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<type>text</type>
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<notnull>true</notnull>
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<length>64</length>
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</field>
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<field>
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<name>name</name>
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<type>text</type>
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<notnull>true</notnull>
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<length>100</length>
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</field>
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<field>
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<name>path</name>
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<type>clob</type>
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<notnull>true</notnull>
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</field>
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</declaration>
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</table>
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</database>
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To update the tables used by the app, simply adjust the database.xml file and increase the app version number in :file:`appinfo/info.xml` to trigger an update.
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