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<h1 id="settings">Settings</h1>
<blockquote>
<p>Namespaces are one honking great idea - let's do more of those!</p>
<p>— <a href="http://www.python.org/dev/peps/pep-0020/">The Zen of Python</a></p>
</blockquote>
<p>Configuration for REST framework is all namespaced inside a single Django setting, named <code>REST_FRAMEWORK</code>.</p>
<p>For example your project's <code>settings.py</code> file might include something like this:</p>
<pre><code>REST_FRAMEWORK = {
'DEFAULT_RENDERER_CLASSES': (
'rest_framework.renderers.YAMLRenderer',
),
'DEFAULT_PARSER_CLASSES': (
'rest_framework.parsers.YAMLParser',
)
}
</code></pre>
<h2 id="accessing-settings">Accessing settings</h2>
<p>If you need to access the values of REST framework's API settings in your project,
you should use the <code>api_settings</code> object. For example.</p>
<pre><code>from rest_framework.settings import api_settings
print api_settings.DEFAULT_AUTHENTICATION_CLASSES
</code></pre>
<p>The <code>api_settings</code> object will check for any user-defined settings, and otherwise fall back to the default values. Any setting that uses string import paths to refer to a class will automatically import and return the referenced class, instead of the string literal.</p>
<hr />
<h1 id="api-reference">API Reference</h1>
<h2 id="api-policy-settings">API policy settings</h2>
<p><em>The following settings control the basic API policies, and are applied to every <code>APIView</code> class based view, or <code>@api_view</code> function based view.</em></p>
<h4 id="default_renderer_classes">DEFAULT_RENDERER_CLASSES</h4>
<p>A list or tuple of renderer classes, that determines the default set of renderers that may be used when returning a <code>Response</code> object.</p>
<p>Default:</p>
<pre><code>(
'rest_framework.renderers.JSONRenderer',
'rest_framework.renderers.BrowsableAPIRenderer',
)
</code></pre>
<h4 id="default_parser_classes">DEFAULT_PARSER_CLASSES</h4>
<p>A list or tuple of parser classes, that determines the default set of parsers used when accessing the <code>request.data</code> property.</p>
<p>Default:</p>
<pre><code>(
'rest_framework.parsers.JSONParser',
'rest_framework.parsers.FormParser',
'rest_framework.parsers.MultiPartParser'
)
</code></pre>
<h4 id="default_authentication_classes">DEFAULT_AUTHENTICATION_CLASSES</h4>
<p>A list or tuple of authentication classes, that determines the default set of authenticators used when accessing the <code>request.user</code> or <code>request.auth</code> properties.</p>
<p>Default:</p>
<pre><code>(
'rest_framework.authentication.SessionAuthentication',
'rest_framework.authentication.BasicAuthentication'
)
</code></pre>
<h4 id="default_permission_classes">DEFAULT_PERMISSION_CLASSES</h4>
<p>A list or tuple of permission classes, that determines the default set of permissions checked at the start of a view. Permission must be granted by every class in the list.</p>
<p>Default:</p>
<pre><code>(
'rest_framework.permissions.AllowAny',
)
</code></pre>
<h4 id="default_throttle_classes">DEFAULT_THROTTLE_CLASSES</h4>
<p>A list or tuple of throttle classes, that determines the default set of throttles checked at the start of a view.</p>
<p>Default: <code>()</code></p>
<h4 id="default_content_negotiation_class">DEFAULT_CONTENT_NEGOTIATION_CLASS</h4>
<p>A content negotiation class, that determines how a renderer is selected for the response, given an incoming request.</p>
<p>Default: <code>'rest_framework.negotiation.DefaultContentNegotiation'</code></p>
<hr />
<h2 id="generic-view-settings">Generic view settings</h2>
<p><em>The following settings control the behavior of the generic class based views.</em></p>
<h4 id="default_pagination_serializer_class">DEFAULT_PAGINATION_SERIALIZER_CLASS</h4>
<p>A class the determines the default serialization style for paginated responses.</p>
<p>Default: <code>rest_framework.pagination.PaginationSerializer</code></p>
<h4 id="default_filter_backends">DEFAULT_FILTER_BACKENDS</h4>
<p>A list of filter backend classes that should be used for generic filtering.
If set to <code>None</code> then generic filtering is disabled.</p>
<h4 id="paginate_by">PAGINATE_BY</h4>
<p>The default page size to use for pagination. If set to <code>None</code>, pagination is disabled by default.</p>
<p>Default: <code>None</code></p>
<h4 id="paginate_by_param">PAGINATE_BY_PARAM</h4>
<p>The name of a query parameter, which can be used by the client to override the default page size to use for pagination. If set to <code>None</code>, clients may not override the default page size.</p>
<p>For example, given the following settings:</p>
<pre><code>REST_FRAMEWORK = {
'PAGINATE_BY': 10,
'PAGINATE_BY_PARAM': 'page_size',
}
</code></pre>
<p>A client would be able to modify the pagination size by using the <code>page_size</code> query parameter. For example:</p>
<pre><code>GET http://example.com/api/accounts?page_size=25
</code></pre>
<p>Default: <code>None</code></p>
<h4 id="max_paginate_by">MAX_PAGINATE_BY</h4>
<p>The maximum page size to allow when the page size is specified by the client. If set to <code>None</code>, then no maximum limit is applied.</p>
<p>For example, given the following settings:</p>
<pre><code>REST_FRAMEWORK = {
'PAGINATE_BY': 10,
'PAGINATE_BY_PARAM': 'page_size',
'MAX_PAGINATE_BY': 100
}
</code></pre>
<p>A client request like the following would return a paginated list of up to 100 items.</p>
<pre><code>GET http://example.com/api/accounts?page_size=999
</code></pre>
<p>Default: <code>None</code></p>
<h3 id="search_param">SEARCH_PARAM</h3>
<p>The name of a query parameter, which can be used to specify the search term used by <code>SearchFilter</code>.</p>
<p>Default: <code>search</code></p>
<h4 id="ordering_param">ORDERING_PARAM</h4>
<p>The name of a query parameter, which can be used to specify the ordering of results returned by <code>OrderingFilter</code>.</p>
<p>Default: <code>ordering</code></p>
<hr />
<h2 id="authentication-settings">Authentication settings</h2>
<p><em>The following settings control the behavior of unauthenticated requests.</em></p>
<h4 id="unauthenticated_user">UNAUTHENTICATED_USER</h4>
<p>The class that should be used to initialize <code>request.user</code> for unauthenticated requests.</p>
<p>Default: <code>django.contrib.auth.models.AnonymousUser</code></p>
<h4 id="unauthenticated_token">UNAUTHENTICATED_TOKEN</h4>
<p>The class that should be used to initialize <code>request.auth</code> for unauthenticated requests.</p>
<p>Default: <code>None</code></p>
<hr />
<h2 id="test-settings">Test settings</h2>
<p><em>The following settings control the behavior of APIRequestFactory and APIClient</em></p>
<h4 id="test_request_default_format">TEST_REQUEST_DEFAULT_FORMAT</h4>
<p>The default format that should be used when making test requests.</p>
<p>This should match up with the format of one of the renderer classes in the <code>TEST_REQUEST_RENDERER_CLASSES</code> setting.</p>
<p>Default: <code>'multipart'</code></p>
<h4 id="test_request_renderer_classes">TEST_REQUEST_RENDERER_CLASSES</h4>
<p>The renderer classes that are supported when building test requests.</p>
<p>The format of any of these renderer classes may be used when constructing a test request, for example: <code>client.post('/users', {'username': 'jamie'}, format='json')</code></p>
<p>Default:</p>
<pre><code>(
'rest_framework.renderers.MultiPartRenderer',
'rest_framework.renderers.JSONRenderer'
)
</code></pre>
<hr />
<h2 id="browser-overrides">Browser overrides</h2>
<p><em>The following settings provide URL or form-based overrides of the default browser behavior.</em></p>
<h4 id="form_method_override">FORM_METHOD_OVERRIDE</h4>
<p>The name of a form field that may be used to override the HTTP method of the form.</p>
<p>If the value of this setting is <code>None</code> then form method overloading will be disabled.</p>
<p>Default: <code>'_method'</code></p>
<h4 id="form_content_override">FORM_CONTENT_OVERRIDE</h4>
<p>The name of a form field that may be used to override the content of the form payload. Must be used together with <code>FORM_CONTENTTYPE_OVERRIDE</code>.</p>
<p>If either setting is <code>None</code> then form content overloading will be disabled.</p>
<p>Default: <code>'_content'</code></p>
<h4 id="form_contenttype_override">FORM_CONTENTTYPE_OVERRIDE</h4>
<p>The name of a form field that may be used to override the content type of the form payload. Must be used together with <code>FORM_CONTENT_OVERRIDE</code>.</p>
<p>If either setting is <code>None</code> then form content overloading will be disabled.</p>
<p>Default: <code>'_content_type'</code></p>
<h4 id="url_accept_override">URL_ACCEPT_OVERRIDE</h4>
<p>The name of a URL parameter that may be used to override the HTTP <code>Accept</code> header.</p>
<p>If the value of this setting is <code>None</code> then URL accept overloading will be disabled.</p>
<p>Default: <code>'accept'</code></p>
<h4 id="url_format_override">URL_FORMAT_OVERRIDE</h4>
<p>The name of a URL parameter that may be used to override the default <code>Accept</code> header based content negotiation.</p>
<p>Default: <code>'format'</code></p>
<hr />
<h2 id="date-and-time-formatting">Date and time formatting</h2>
<p><em>The following settings are used to control how date and time representations may be parsed and rendered.</em></p>
<h4 id="datetime_format">DATETIME_FORMAT</h4>
<p>A format string that should be used by default for rendering the output of <code>DateTimeField</code> serializer fields. If <code>None</code>, then <code>DateTimeField</code> serializer fields will return Python <code>datetime</code> objects, and the datetime encoding will be determined by the renderer.</p>
<p>May be any of <code>None</code>, <code>'iso-8601'</code> or a Python <a href="http://docs.python.org/2/library/time.html#time.strftime">strftime format</a> string.</p>
<p>Default: <code>'iso-8601'</code></p>
<h4 id="datetime_input_formats">DATETIME_INPUT_FORMATS</h4>
<p>A list of format strings that should be used by default for parsing inputs to <code>DateTimeField</code> serializer fields.</p>
<p>May be a list including the string <code>'iso-8601'</code> or Python <a href="http://docs.python.org/2/library/time.html#time.strftime">strftime format</a> strings.</p>
<p>Default: <code>['iso-8601']</code></p>
<h4 id="date_format">DATE_FORMAT</h4>
<p>A format string that should be used by default for rendering the output of <code>DateField</code> serializer fields. If <code>None</code>, then <code>DateField</code> serializer fields will return Python <code>date</code> objects, and the date encoding will be determined by the renderer.</p>
<p>May be any of <code>None</code>, <code>'iso-8601'</code> or a Python <a href="http://docs.python.org/2/library/time.html#time.strftime">strftime format</a> string.</p>
<p>Default: <code>'iso-8601'</code></p>
<h4 id="date_input_formats">DATE_INPUT_FORMATS</h4>
<p>A list of format strings that should be used by default for parsing inputs to <code>DateField</code> serializer fields.</p>
<p>May be a list including the string <code>'iso-8601'</code> or Python <a href="http://docs.python.org/2/library/time.html#time.strftime">strftime format</a> strings.</p>
<p>Default: <code>['iso-8601']</code></p>
<h4 id="time_format">TIME_FORMAT</h4>
<p>A format string that should be used by default for rendering the output of <code>TimeField</code> serializer fields. If <code>None</code>, then <code>TimeField</code> serializer fields will return Python <code>time</code> objects, and the time encoding will be determined by the renderer.</p>
<p>May be any of <code>None</code>, <code>'iso-8601'</code> or a Python <a href="http://docs.python.org/2/library/time.html#time.strftime">strftime format</a> string.</p>
<p>Default: <code>'iso-8601'</code></p>
<h4 id="time_input_formats">TIME_INPUT_FORMATS</h4>
<p>A list of format strings that should be used by default for parsing inputs to <code>TimeField</code> serializer fields.</p>
<p>May be a list including the string <code>'iso-8601'</code> or Python <a href="http://docs.python.org/2/library/time.html#time.strftime">strftime format</a> strings.</p>
<p>Default: <code>['iso-8601']</code></p>
<hr />
<h2 id="encodings">Encodings</h2>
<h4 id="unicode_json">UNICODE_JSON</h4>
<p>When set to <code>True</code>, JSON responses will allow unicode characters in responses. For example:</p>
<pre><code>{"unicode black star":"★"}
</code></pre>
<p>When set to <code>False</code>, JSON responses will escape non-ascii characters, like so:</p>
<pre><code>{"unicode black star":"\u2605"}
</code></pre>
<p>Both styles conform to <a href="http://www.ietf.org/rfc/rfc4627.txt">RFC 4627</a>, and are syntactically valid JSON. The unicode style is preferred as being more user-friendly when inspecting API responses.</p>
<p>Default: <code>True</code></p>
<h4 id="compact_json">COMPACT_JSON</h4>
<p>When set to <code>True</code>, JSON responses will return compact representations, with no spacing after <code>':'</code> and <code>','</code> characters. For example:</p>
<pre><code>{"is_admin":false,"email":"jane@example"}
</code></pre>
<p>When set to <code>False</code>, JSON responses will return slightly more verbose representations, like so:</p>
<pre><code>{"is_admin": false, "email": "jane@example"}
</code></pre>
<p>The default style is to return minified responses, in line with <a href="https://github.com/interagent/http-api-design#keep-json-minified-in-all-responses">Heroku's API design guidelines</a>.</p>
<p>Default: <code>True</code></p>
<h4 id="coerce_decimal_to_string">COERCE_DECIMAL_TO_STRING</h4>
<p>When returning decimal objects in API representations that do not support a native decimal type, it is normally best to return the value as a string. This avoids the loss of precision that occurs with binary floating point implementations.</p>
<p>When set to <code>True</code>, the serializer <code>DecimalField</code> class will return strings instead of <code>Decimal</code> objects. When set to <code>False</code>, serializers will return <code>Decimal</code> objects, which the default JSON encoder will return as floats.</p>
<p>Default: <code>True</code></p>
<hr />
<h2 id="view-names-and-descriptions">View names and descriptions</h2>
<p><strong>The following settings are used to generate the view names and descriptions, as used in responses to <code>OPTIONS</code> requests, and as used in the browsable API.</strong></p>
<h4 id="view_name_function">VIEW_NAME_FUNCTION</h4>
<p>A string representing the function that should be used when generating view names.</p>
<p>This should be a function with the following signature:</p>
<pre><code>view_name(cls, suffix=None)
</code></pre>
<ul>
<li><code>cls</code>: The view class. Typically the name function would inspect the name of the class when generating a descriptive name, by accessing <code>cls.__name__</code>.</li>
<li><code>suffix</code>: The optional suffix used when differentiating individual views in a viewset.</li>
</ul>
<p>Default: <code>'rest_framework.views.get_view_name'</code></p>
<h4 id="view_description_function">VIEW_DESCRIPTION_FUNCTION</h4>
<p>A string representing the function that should be used when generating view descriptions.</p>
<p>This setting can be changed to support markup styles other than the default markdown. For example, you can use it to support <code>rst</code> markup in your view docstrings being output in the browsable API.</p>
<p>This should be a function with the following signature:</p>
<pre><code>view_description(cls, html=False)
</code></pre>
<ul>
<li><code>cls</code>: The view class. Typically the description function would inspect the docstring of the class when generating a description, by accessing <code>cls.__doc__</code></li>
<li><code>html</code>: A boolean indicating if HTML output is required. <code>True</code> when used in the browsable API, and <code>False</code> when used in generating <code>OPTIONS</code> responses.</li>
</ul>
<p>Default: <code>'rest_framework.views.get_view_description'</code></p>
<hr />
<h2 id="miscellaneous-settings">Miscellaneous settings</h2>
<h4 id="exception_handler">EXCEPTION_HANDLER</h4>
<p>A string representing the function that should be used when returning a response for any given exception. If the function returns <code>None</code>, a 500 error will be raised.</p>
<p>This setting can be changed to support error responses other than the default <code>{"detail": "Failure..."}</code> responses. For example, you can use it to provide API responses like <code>{"errors": [{"message": "Failure...", "code": ""} ...]}</code>.</p>
<p>This should be a function with the following signature:</p>
<pre><code>exception_handler(exc)
</code></pre>
<ul>
<li><code>exc</code>: The exception.</li>
</ul>
<p>Default: <code>'rest_framework.views.exception_handler'</code></p>
<h4 id="non_field_errors_key">NON_FIELD_ERRORS_KEY</h4>
<p>A string representing the key that should be used for serializer errors that do not refer to a specific field, but are instead general errors.</p>
<p>Default: <code>'non_field_errors'</code></p>
<h4 id="url_field_name">URL_FIELD_NAME</h4>
<p>A string representing the key that should be used for the URL fields generated by <code>HyperlinkedModelSerializer</code>.</p>
<p>Default: <code>'url'</code></p>
<h4 id="format_suffix_kwarg">FORMAT_SUFFIX_KWARG</h4>
<p>The name of a parameter in the URL conf that may be used to provide a format suffix.</p>
<p>Default: <code>'format'</code></p>
<h4 id="num_proxies">NUM_PROXIES</h4>
<p>An integer of 0 or more, that may be used to specify the number of application proxies that the API runs behind. This allows throttling to more accurately identify client IP addresses. If set to <code>None</code> then less strict IP matching will be used by the throttle classes.</p>
<p>Default: <code>None</code></p>
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