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<a class="brand" href="http://tomchristie.github.com/django-rest-framework">Django REST framework</a>
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<li><a href="http://tomchristie.github.com/django-rest-framework">Home</a></li>
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<li><a href="http://tomchristie.github.com/django-rest-framework/tutorial/1-serialization">1 - Serialization</a></li>
<li><a href="http://tomchristie.github.com/django-rest-framework/tutorial/2-requests-and-responses">2 - Requests and responses</a></li>
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<li><a href="http://tomchristie.github.com/django-rest-framework/api-guide/exceptions">Exceptions</a></li>
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<li><a href="http://tomchristie.github.com/django-rest-framework/topics/csrf">Working with AJAX and CSRF</a></li>
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<li class="main"><a href="#exceptions">Exceptions</a></li>
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<li><a href="#exception-handling-in-rest-framework-views">Exception handling in REST framework views</a></li>
<li><a href="#apiexception">APIException</a></li>
<li><a href="#parseerror">ParseError</a></li>
<li><a href="#permissiondenied">PermissionDenied</a></li>
<li><a href="#methodnotallowed">MethodNotAllowed</a></li>
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<p><a class="github" href="https://github.com/tomchristie/django-rest-framework/blob/restframework2/rest_framework/exceptions.py"><span class="label label-info">exceptions.py</span></a></p>
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<h1 id="exceptions">Exceptions</h1>
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<blockquote>
<p>Exceptions… allow error handling to be organized cleanly in a central or high-level place within the program structure.</p>
<p>&mdash; Doug Hellmann, <a href="http://www.doughellmann.com/articles/how-tos/python-exception-handling/index.html">Python Exception Handling Techniques</a></p>
</blockquote>
<h2 id="exception-handling-in-rest-framework-views">Exception handling in REST framework views</h2>
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<p>REST framework's views handle various exceptions, and deal with returning appropriate error responses.</p>
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<p>The handled exceptions are:</p>
<ul>
<li>Subclasses of <code>APIException</code> raised inside REST framework.</li>
<li>Django's <code>Http404</code> exception.</li>
<li>Django's <code>PermissionDenied</code> exception.</li>
</ul>
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<p>In each case, REST framework will return a response with an appropriate status code and content-type. The body of the response will include any additional details regarding the nature of the error.</p>
<p>By default all error responses will include a key <code>details</code> in the body of the response, but other keys may also be included.</p>
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<p>For example, the following request:</p>
<pre class="prettyprint lang-py"><code>DELETE http://api.example.com/foo/bar HTTP/1.1
Accept: application/json
</code></pre>
<p>Might recieve an error response indicating that the <code>DELETE</code> method is not allowed on that resource:</p>
<pre class="prettyprint lang-py"><code>HTTP/1.1 405 Method Not Allowed
Content-Type: application/json; charset=utf-8
Content-Length: 42
{"detail": "Method 'DELETE' not allowed."}
</code></pre>
<h2 id="apiexception">APIException</h2>
<p><strong>Signature:</strong> <code>APIException(detail=None)</code></p>
<p>The base class for all exceptions raised inside REST framework.</p>
<p>To provide a custom exception, subclass <code>APIException</code> and set the <code>.status_code</code> and <code>.detail</code> properties on the class.</p>
<h2 id="parseerror">ParseError</h2>
<p><strong>Signature:</strong> <code>ParseError(detail=None)</code></p>
<p>Raised if the request contains malformed data when accessing <code>request.DATA</code> or <code>request.FILES</code>.</p>
<p>By default this exception results in a response with the HTTP status code "400 Bad Request".</p>
<h2 id="permissiondenied">PermissionDenied</h2>
<p><strong>Signature:</strong> <code>PermissionDenied(detail=None)</code></p>
<p>Raised when an incoming request fails the permission checks.</p>
<p>By default this exception results in a response with the HTTP status code "403 Forbidden".</p>
<h2 id="methodnotallowed">MethodNotAllowed</h2>
<p><strong>Signature:</strong> <code>MethodNotAllowed(method, detail=None)</code></p>
<p>Raised when an incoming request occurs that does not map to a handler method on the view.</p>
<p>By default this exception results in a response with the HTTP status code "405 Method Not Allowed".</p>
<h2 id="unsupportedmediatype">UnsupportedMediaType</h2>
<p><strong>Signature:</strong> <code>UnsupportedMediaType(media_type, detail=None)</code></p>
<p>Raised if there are no parsers that can handle the content type of the request data when accessing <code>request.DATA</code> or <code>request.FILES</code>.</p>
<p>By default this exception results in a response with the HTTP status code "415 Unsupported Media Type".</p>
<h2 id="throttled">Throttled</h2>
<p><strong>Signature:</strong> <code>Throttled(wait=None, detail=None)</code></p>
<p>Raised when an incoming request fails the throttling checks.</p>
<p>By default this exception results in a response with the HTTP status code "429 Too Many Requests".</p>
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