encode/django-rest-framework
1
1
Fork 0
mirror of https://github.com/encode/django-rest-framework.git synced 2024-11-29 13:04:03 +03:00
Code Issues Packages Projects Releases Wiki Activity
fd207b6c66
django-rest-framework/topics/writable-nested-serializers/index.html

513 lines
19 KiB
HTML
Raw Normal View History

Deployed de497a9b with MkDocs version: 1.0.4
2020-06-02 12:07:44 +03:00
<!DOCTYPE html>
<html lang="en">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<meta charset="utf-8">
<title>Writable nested serializers - Django REST framework</title>
<link href="../../img/favicon.ico" rel="icon" type="image/x-icon">
<link rel="canonical" href="https://www.django-rest-framework.org/topics/writable-nested-serializers/" />
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<meta name="description" content="Django, API, REST, Writable nested serializers">
<meta name="author" content="Tom Christie">
<!-- Le styles -->
<link href="../../css/prettify.css" rel="stylesheet">
<link href="../../css/bootstrap.css" rel="stylesheet">
<link href="../../css/bootstrap-responsive.css" rel="stylesheet">
<link href="../../css/default.css" rel="stylesheet">
<script type="text/javascript">
var _gaq = _gaq || [];
_gaq.push(['_setAccount', 'UA-18852272-2']);
_gaq.push(['_trackPageview']);
(function() {
var ga = document.createElement('script');
ga.type = 'text/javascript';
ga.async = true;
ga.src = ('https:' == document.location.protocol ? 'https://ssl' : 'http://www') + '.google-analytics.com/ga.js';
var s = document.getElementsByTagName('script')[0];
s.parentNode.insertBefore(ga, s);
})();
</script>
<style>
#sidebarInclude img {
margin-bottom: 10px;
}
#sidebarInclude a.promo {
color: black;
}
@media (max-width: 767px) {
div.promo {
display: none;
}
}
</style>
</head>
<body onload="prettyPrint()" class="-page">
<div class="wrapper">
<div class="navbar navbar-inverse navbar-fixed-top">
<div class="navbar-inner">
<div class="container-fluid">
<a class="repo-link btn btn-primary btn-small" href="https://github.com/encode/django-rest-framework/tree/master">GitHub</a>
<a class="repo-link btn btn-inverse btn-small disabled" rel="next" >
Next <i class="icon-arrow-right icon-white"></i>
</a>
<a class="repo-link btn btn-inverse btn-small disabled" rel="prev" >
<i class="icon-arrow-left icon-white"></i> Previous
</a>
<a id="search_modal_show" class="repo-link btn btn-inverse btn-small" href="#mkdocs_search_modal" data-toggle="modal" data-target="#mkdocs_search_modal"><i class="icon-search icon-white"></i> Search</a>
<a class="btn btn-navbar" data-toggle="collapse" data-target=".nav-collapse">
<span class="icon-bar"></span>
<span class="icon-bar"></span>
<span class="icon-bar"></span>
</a>
<a class="brand" href="https://www.django-rest-framework.org/">Django REST framework</a>
<div class="nav-collapse collapse">
<!-- Main navigation -->
<ul class="nav navbar-nav">
<li >
<a href="../..">Home</a>
</li>
<li class="dropdown">
<a href="#" class="dropdown-toggle" data-toggle="dropdown">Tutorial <b class="caret"></b></a>
<ul class="dropdown-menu">
<li >
<a href="../../tutorial/quickstart/">Quickstart</a>
</li>
<li >
<a href="../../tutorial/1-serialization/">1 - Serialization</a>
</li>
<li >
<a href="../../tutorial/2-requests-and-responses/">2 - Requests and responses</a>
</li>
<li >
<a href="../../tutorial/3-class-based-views/">3 - Class based views</a>
</li>
<li >
<a href="../../tutorial/4-authentication-and-permissions/">4 - Authentication and permissions</a>
</li>
<li >
<a href="../../tutorial/5-relationships-and-hyperlinked-apis/">5 - Relationships and hyperlinked APIs</a>
</li>
<li >
<a href="../../tutorial/6-viewsets-and-routers/">6 - Viewsets and routers</a>
</li>
</ul>
</li>
<li class="dropdown">
<a href="#" class="dropdown-toggle" data-toggle="dropdown">API Guide <b class="caret"></b></a>
<ul class="dropdown-menu">
<li >
<a href="../../api-guide/requests/">Requests</a>
</li>
<li >
<a href="../../api-guide/responses/">Responses</a>
</li>
<li >
<a href="../../api-guide/views/">Views</a>
</li>
<li >
<a href="../../api-guide/generic-views/">Generic views</a>
</li>
<li >
<a href="../../api-guide/viewsets/">Viewsets</a>
</li>
<li >
<a href="../../api-guide/routers/">Routers</a>
</li>
<li >
<a href="../../api-guide/parsers/">Parsers</a>
</li>
<li >
<a href="../../api-guide/renderers/">Renderers</a>
</li>
<li >
<a href="../../api-guide/serializers/">Serializers</a>
</li>
<li >
<a href="../../api-guide/fields/">Serializer fields</a>
</li>
<li >
<a href="../../api-guide/relations/">Serializer relations</a>
</li>
<li >
<a href="../../api-guide/validators/">Validators</a>
</li>
<li >
<a href="../../api-guide/authentication/">Authentication</a>
</li>
<li >
<a href="../../api-guide/permissions/">Permissions</a>
</li>
<li >
<a href="../../api-guide/caching/">Caching</a>
</li>
<li >
<a href="../../api-guide/throttling/">Throttling</a>
</li>
<li >
<a href="../../api-guide/filtering/">Filtering</a>
</li>
<li >
<a href="../../api-guide/pagination/">Pagination</a>
</li>
<li >
<a href="../../api-guide/versioning/">Versioning</a>
</li>
<li >
<a href="../../api-guide/content-negotiation/">Content negotiation</a>
</li>
<li >
<a href="../../api-guide/metadata/">Metadata</a>
</li>
<li >
<a href="../../api-guide/schemas/">Schemas</a>
</li>
<li >
<a href="../../api-guide/format-suffixes/">Format suffixes</a>
</li>
<li >
<a href="../../api-guide/reverse/">Returning URLs</a>
</li>
<li >
<a href="../../api-guide/exceptions/">Exceptions</a>
</li>
<li >
<a href="../../api-guide/status-codes/">Status codes</a>
</li>
<li >
<a href="../../api-guide/testing/">Testing</a>
</li>
<li >
<a href="../../api-guide/settings/">Settings</a>
</li>
</ul>
</li>
<li class="dropdown">
<a href="#" class="dropdown-toggle" data-toggle="dropdown">Topics <b class="caret"></b></a>
<ul class="dropdown-menu">
<li >
<a href="../documenting-your-api/">Documenting your API</a>
</li>
<li >
<a href="../api-clients/">API Clients</a>
</li>
<li >
<a href="../internationalization/">Internationalization</a>
</li>
<li >
<a href="../ajax-csrf-cors/">AJAX, CSRF & CORS</a>
</li>
<li >
<a href="../html-and-forms/">HTML & Forms</a>
</li>
<li >
<a href="../browser-enhancements/">Browser Enhancements</a>
</li>
<li >
<a href="../browsable-api/">The Browsable API</a>
</li>
<li >
<a href="../rest-hypermedia-hateoas/">REST, Hypermedia & HATEOAS</a>
</li>
</ul>
</li>
<li class="dropdown">
<a href="#" class="dropdown-toggle" data-toggle="dropdown">Community <b class="caret"></b></a>
<ul class="dropdown-menu">
<li >
<a href="../../community/tutorials-and-resources/">Tutorials and Resources</a>
</li>
<li >
<a href="../../community/third-party-packages/">Third Party Packages</a>
</li>
<li >
<a href="../../community/contributing/">Contributing to REST framework</a>
</li>
<li >
<a href="../../community/project-management/">Project management</a>
</li>
<li >
<a href="../../community/release-notes/">Release Notes</a>
</li>
<li >
<a href="../../community/3.11-announcement/">3.11 Announcement</a>
</li>
<li >
<a href="../../community/3.10-announcement/">3.10 Announcement</a>
</li>
<li >
<a href="../../community/3.9-announcement/">3.9 Announcement</a>
</li>
<li >
<a href="../../community/3.8-announcement/">3.8 Announcement</a>
</li>
<li >
<a href="../../community/3.7-announcement/">3.7 Announcement</a>
</li>
<li >
<a href="../../community/3.6-announcement/">3.6 Announcement</a>
</li>
<li >
<a href="../../community/3.5-announcement/">3.5 Announcement</a>
</li>
<li >
<a href="../../community/3.4-announcement/">3.4 Announcement</a>
</li>
<li >
<a href="../../community/3.3-announcement/">3.3 Announcement</a>
</li>
<li >
<a href="../../community/3.2-announcement/">3.2 Announcement</a>
</li>
<li >
<a href="../../community/3.1-announcement/">3.1 Announcement</a>
</li>
<li >
<a href="../../community/3.0-announcement/">3.0 Announcement</a>
</li>
<li >
<a href="../../community/kickstarter-announcement/">Kickstarter Announcement</a>
</li>
<li >
<a href="../../community/mozilla-grant/">Mozilla Grant</a>
</li>
<li >
<a href="../../community/funding/">Funding</a>
</li>
<li >
<a href="../../community/jobs/">Jobs</a>
</li>
</ul>
</li>
</ul>
</div>
<!--/.nav-collapse -->
</div>
</div>
</div>
<div class="body-content">
<div class="container-fluid">
<!-- Search Modal -->
<div id="mkdocs_search_modal" class="modal hide fade" tabindex="-1" role="dialog" aria-labelledby="myModalLabel" aria-hidden="true">
<div class="modal-header">
<button type="button" class="close" data-dismiss="modal" aria-hidden="true">&times;</button>
<h3 id="myModalLabel">Documentation search</h3>
</div>
<div class="modal-body">
<form role="form" autocomplete="off">
<div class="form-group">
<input type="text" name="q" class="form-control" placeholder="Search..." id="mkdocs-search-query">
</div>
</form>
<div id="mkdocs-search-results"></div>
</div>
<div class="modal-footer">
<button class="btn" data-dismiss="modal" aria-hidden="true">Close</button>
</div>
</div>
<div class="row-fluid">
<div class="span3">
<div id="table-of-contents">
<ul class="nav nav-list side-nav well sidebar-nav-fixed">
<li class="main">
<a href="#writable-nested-serializers">Writable nested serializers</a>
</li>
<li>
<a href="#one-to-many-data-structures">One-to-many data structures</a>
</li>
<div class="promo">
<hr/>
<div id="sidebarInclude">
</div>
</ul>
</div>
</div>
<div id="main-content" class="span9">
<blockquote>
<p>To save HTTP requests, it may be convenient to send related documents along with the request.</p>
<p>&mdash; <a href="http://jsonapi.org/format/#url-based-json-api">JSON API specification for Ember Data</a>.</p>
</blockquote>
<h1 id="writable-nested-serializers"><a class="toclink" href="#writable-nested-serializers">Writable nested serializers</a></h1>
<p>Although flat data structures serve to properly delineate between the individual entities in your service, there are cases where it may be more appropriate or convenient to use nested data structures.</p>
<p>Nested data structures are easy enough to work with if they're read-only - simply nest your serializer classes and you're good to go. However, there are a few more subtleties to using writable nested serializers, due to the dependencies between the various model instances, and the need to save or delete multiple instances in a single action.</p>
<h2 id="one-to-many-data-structures"><a class="toclink" href="#one-to-many-data-structures">One-to-many data structures</a></h2>
<p><em>Example of a <strong>read-only</strong> nested serializer. Nothing complex to worry about here.</em></p>
<pre><code>class ToDoItemSerializer(serializers.ModelSerializer):
class Meta:
model = ToDoItem
fields = ['text', 'is_completed']
class ToDoListSerializer(serializers.ModelSerializer):
items = ToDoItemSerializer(many=True, read_only=True)
class Meta:
model = ToDoList
fields = ['title', 'items']
</code></pre>
<p>Some example output from our serializer.</p>
<pre><code>{
'title': 'Leaving party preparations',
'items': [
{'text': 'Compile playlist', 'is_completed': True},
{'text': 'Send invites', 'is_completed': False},
{'text': 'Clean house', 'is_completed': False}
]
}
</code></pre>
<p>Let's take a look at updating our nested one-to-many data structure.</p>
<h3 id="validation-errors"><a class="toclink" href="#validation-errors">Validation errors</a></h3>
<h3 id="adding-and-removing-items"><a class="toclink" href="#adding-and-removing-items">Adding and removing items</a></h3>
<h3 id="making-patch-requests"><a class="toclink" href="#making-patch-requests">Making PATCH requests</a></h3>
</div> <!--/span-->
</div> <!--/row-->
</div> <!--/.fluid-container-->
</div> <!--/.body content-->
<div id="push"></div>
</div> <!--/.wrapper -->
<footer class="span12">
<p>Documentation built with <a href="http://www.mkdocs.org/">MkDocs</a>.
</p>
</footer>
<!-- Le javascript
================================================== -->
<!-- Placed at the end of the document so the pages load faster -->
<script async src="https://fund.django-rest-framework.org/sidebar_include.js"></script>
<script src="../../js/jquery-1.8.1-min.js"></script>
<script src="../../js/prettify-1.0.js"></script>
<script src="../../js/bootstrap-2.1.1-min.js"></script>
<script src="../../js/theme.js"></script>
<script>var base_url = '../..';</script>
<script src="../../search/main.js" defer></script>
<script>
var shiftWindow = function() {
scrollBy(0, -50)
};
if (location.hash) shiftWindow();
window.addEventListener("hashchange", shiftWindow);
$('.dropdown-menu').on('click touchstart', function(event) {
event.stopPropagation();
});
// Dynamically force sidenav/dropdown to no higher than browser window
$('.side-nav, .dropdown-menu').css('max-height', window.innerHeight - 130);
$(function() {
$(window).resize(function() {
$('.side-nav, .dropdown-menu').css('max-height', window.innerHeight - 130);
});
});
</script>
</body>
</html>
Reference in New Issue Copy Permalink