查看“Django/docs/2.2.x/ref/contrib/postgres/index”的源代码

<div id="module-django.contrib.postgres" class="section">

<span id="django-contrib-postgres"></span>
= <code>django.contrib.postgres</code> =

PostgreSQL has a number of features which are not shared by the other databases
Django supports. This optional module contains model fields and form fields for
a number of PostgreSQL specific data types.

<div class="admonition note">

注解

Django is, and will continue to be, a database-agnostic web framework. We
would encourage those writing reusable applications for the Django
community to write database-agnostic code where practical. However, we
recognize that real world projects written using Django need not be
database-agnostic. In fact, once a project reaches a given size changing
the underlying data store is already a significant challenge and is likely
to require changing the code base in some ways to handle differences
between the data stores.

Django provides support for a number of data types which will
only work with PostgreSQL. There is no fundamental reason why (for example)
a <code>contrib.mysql</code> module does not exist, except that PostgreSQL has the
richest feature set of the supported databases so its users have the most
to gain.


</div>
<div class="toctree-wrapper compound">

* [[../aggregates|PostgreSQL specific aggregation functions]]
** [[../aggregates#general-purpose-aggregation-functions|General-purpose aggregation functions]]
** [[../aggregates#aggregate-functions-for-statistics|Aggregate functions for statistics]]
** [[../aggregates#usage-examples|Usage examples]]
* [[../fields|PostgreSQL specific model fields]]
** [[../fields#indexing-these-fields|Indexing these fields]]
** [[../fields#arrayfield|<code>ArrayField</code>]]
** [[../fields#citext-fields|<code>CIText</code> fields]]
** [[../fields#hstorefield|<code>HStoreField</code>]]
** [[../fields#jsonfield|<code>JSONField</code>]]
** [[../fields#range-fields|Range Fields]]
* [[../forms|PostgreSQL specific form fields and widgets]]
** [[../forms#fields|字段]]
** [[../forms#widgets|小部件]]
* [[../functions|PostgreSQL specific database functions]]
** [[../functions#randomuuid|<code>RandomUUID</code>]]
** [[../functions#transactionnow|<code>TransactionNow</code>]]
* [[../indexes|PostgreSQL specific model indexes]]
** [[../indexes#brinindex|<code>BrinIndex</code>]]
** [[../indexes#btreeindex|<code>BTreeIndex</code>]]
** [[../indexes#ginindex|<code>GinIndex</code>]]
** [[../indexes#gistindex|<code>GistIndex</code>]]
** [[../indexes#hashindex|<code>HashIndex</code>]]
** [[../indexes#spgistindex|<code>SpGistIndex</code>]]
* [[../lookups|PostgreSQL specific lookups]]
** [[../lookups#trigram-similarity|Trigram similarity]]
** [[../lookups#unaccent|<code>Unaccent</code>]]
* [[../operations|Database migration operations]]
** [[../operations#creating-extension-using-migrations|Creating extension using migrations]]
** [[../operations#createextension|<code>CreateExtension</code>]]
** [[../operations#btreeginextension|<code>BtreeGinExtension</code>]]
** [[../operations#btreegistextension|<code>BtreeGistExtension</code>]]
** [[../operations#citextextension|<code>CITextExtension</code>]]
** [[../operations#cryptoextension|<code>CryptoExtension</code>]]
** [[../operations#hstoreextension|<code>HStoreExtension</code>]]
** [[../operations#trigramextension|<code>TrigramExtension</code>]]
** [[../operations#unaccentextension|<code>UnaccentExtension</code>]]
* [[../search|Full text search]]
** [[../search#the-search-lookup|The <code>search</code> lookup]]
** [[../search#searchvector|<code>SearchVector</code>]]
** [[../search#searchquery|<code>SearchQuery</code>]]
** [[../search#searchrank|<code>SearchRank</code>]]
** [[../search#changing-the-search-configuration|Changing the search configuration]]
** [[../search#weighting-queries|Weighting queries]]
** [[../search#performance|Performance]]
** [[../search#trigram-similarity|Trigram similarity]]
* [[../validators|Validators]]
** [[../validators#keysvalidator|<code>KeysValidator</code>]]
** [[../validators#range-validators|Range validators]]


</div>

</div>

[[Category:Django 2.2.x 中文文档]]