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370 lines
12 KiB
Markdown
370 lines
12 KiB
Markdown
<a class="github" href="settings.py"></a>
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# Settings
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> Namespaces are one honking great idea - let's do more of those!
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>
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> — [The Zen of Python][cite]
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Configuration for REST framework is all namespaced inside a single Django setting, named `REST_FRAMEWORK`.
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For example your project's `settings.py` file might include something like this:
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REST_FRAMEWORK = {
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'DEFAULT_RENDERER_CLASSES': (
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'rest_framework.renderers.YAMLRenderer',
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),
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'DEFAULT_PARSER_CLASSES': (
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'rest_framework.parsers.YAMLParser',
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)
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}
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## Accessing settings
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If you need to access the values of REST framework's API settings in your project,
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you should use the `api_settings` object. For example.
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from rest_framework.settings import api_settings
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print api_settings.DEFAULT_AUTHENTICATION_CLASSES
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The `api_settings` 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.
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---
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# API Reference
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## API policy settings
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*The following settings control the basic API policies, and are applied to every `APIView` class based view, or `@api_view` function based view.*
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#### DEFAULT_RENDERER_CLASSES
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A list or tuple of renderer classes, that determines the default set of renderers that may be used when returning a `Response` object.
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Default:
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(
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'rest_framework.renderers.JSONRenderer',
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'rest_framework.renderers.BrowsableAPIRenderer',
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)
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#### DEFAULT_PARSER_CLASSES
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A list or tuple of parser classes, that determines the default set of parsers used when accessing the `request.DATA` property.
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Default:
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(
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'rest_framework.parsers.JSONParser',
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'rest_framework.parsers.FormParser',
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'rest_framework.parsers.MultiPartParser'
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)
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#### DEFAULT_AUTHENTICATION_CLASSES
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A list or tuple of authentication classes, that determines the default set of authenticators used when accessing the `request.user` or `request.auth` properties.
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Default:
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(
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'rest_framework.authentication.SessionAuthentication',
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'rest_framework.authentication.BasicAuthentication'
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)
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#### DEFAULT_PERMISSION_CLASSES
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A list or tuple of permission classes, that determines the default set of permissions checked at the start of a view.
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Default:
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(
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'rest_framework.permissions.AllowAny',
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)
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#### DEFAULT_THROTTLE_CLASSES
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A list or tuple of throttle classes, that determines the default set of throttles checked at the start of a view.
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Default: `()`
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#### DEFAULT_CONTENT_NEGOTIATION_CLASS
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A content negotiation class, that determines how a renderer is selected for the response, given an incoming request.
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Default: `'rest_framework.negotiation.DefaultContentNegotiation'`
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---
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## Generic view settings
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*The following settings control the behavior of the generic class based views.*
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#### DEFAULT_MODEL_SERIALIZER_CLASS
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A class that determines the default type of model serializer that should be used by a generic view if `model` is specified, but `serializer_class` is not provided.
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Default: `'rest_framework.serializers.ModelSerializer'`
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#### DEFAULT_PAGINATION_SERIALIZER_CLASS
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A class the determines the default serialization style for paginated responses.
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Default: `rest_framework.pagination.PaginationSerializer`
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#### DEFAULT_FILTER_BACKENDS
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A list of filter backend classes that should be used for generic filtering.
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If set to `None` then generic filtering is disabled.
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#### PAGINATE_BY
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The default page size to use for pagination. If set to `None`, pagination is disabled by default.
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Default: `None`
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#### PAGINATE_BY_PARAM
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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 `None`, clients may not override the default page size.
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For example, given the following settings:
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REST_FRAMEWORK = {
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'PAGINATE_BY': 10,
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'PAGINATE_BY_PARAM': 'page_size',
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}
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A client would be able to modify the pagination size by using the `page_size` query parameter. For example:
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GET http://example.com/api/accounts?page_size=25
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Default: `None`
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#### MAX_PAGINATE_BY
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The maximum page size to allow when the page size is specified by the client. If set to `None`, then no maximum limit is applied.
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For example, given the following settings:
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REST_FRAMEWORK = {
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'PAGINATE_BY': 10,
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'PAGINATE_BY_PARAM': 'page_size',
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'MAX_PAGINATE_BY': 100
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}
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A client request like the following would return a paginated list of up to 100 items.
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GET http://example.com/api/accounts?page_size=999
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Default: `None`
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---
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## Authentication settings
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*The following settings control the behavior of unauthenticated requests.*
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#### UNAUTHENTICATED_USER
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The class that should be used to initialize `request.user` for unauthenticated requests.
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Default: `django.contrib.auth.models.AnonymousUser`
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#### UNAUTHENTICATED_TOKEN
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The class that should be used to initialize `request.auth` for unauthenticated requests.
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Default: `None`
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---
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## Test settings
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*The following settings control the behavior of APIRequestFactory and APIClient*
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#### TEST_REQUEST_DEFAULT_FORMAT
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The default format that should be used when making test requests.
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This should match up with the format of one of the renderer classes in the `TEST_REQUEST_RENDERER_CLASSES` setting.
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Default: `'multipart'`
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#### TEST_REQUEST_RENDERER_CLASSES
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The renderer classes that are supported when building test requests.
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The format of any of these renderer classes may be used when constructing a test request, for example: `client.post('/users', {'username': 'jamie'}, format='json')`
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Default:
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(
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'rest_framework.renderers.MultiPartRenderer',
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'rest_framework.renderers.JSONRenderer'
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)
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---
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## Browser overrides
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*The following settings provide URL or form-based overrides of the default browser behavior.*
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#### FORM_METHOD_OVERRIDE
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The name of a form field that may be used to override the HTTP method of the form.
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If the value of this setting is `None` then form method overloading will be disabled.
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Default: `'_method'`
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#### FORM_CONTENT_OVERRIDE
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The name of a form field that may be used to override the content of the form payload. Must be used together with `FORM_CONTENTTYPE_OVERRIDE`.
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If either setting is `None` then form content overloading will be disabled.
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Default: `'_content'`
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#### FORM_CONTENTTYPE_OVERRIDE
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The name of a form field that may be used to override the content type of the form payload. Must be used together with `FORM_CONTENT_OVERRIDE`.
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If either setting is `None` then form content overloading will be disabled.
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Default: `'_content_type'`
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#### URL_ACCEPT_OVERRIDE
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The name of a URL parameter that may be used to override the HTTP `Accept` header.
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If the value of this setting is `None` then URL accept overloading will be disabled.
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Default: `'accept'`
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#### URL_FORMAT_OVERRIDE
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The name of a URL parameter that may be used to override the default `Accept` header based content negotiation.
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Default: `'format'`
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---
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## Date and time formatting
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*The following settings are used to control how date and time representations may be parsed and rendered.*
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#### DATETIME_FORMAT
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A format string that should be used by default for rendering the output of `DateTimeField` serializer fields. If `None`, then `DateTimeField` serializer fields will return Python `datetime` objects, and the datetime encoding will be determined by the renderer.
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May be any of `None`, `'iso-8601'` or a Python [strftime format][strftime] string.
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Default: `None`
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#### DATETIME_INPUT_FORMATS
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A list of format strings that should be used by default for parsing inputs to `DateTimeField` serializer fields.
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May be a list including the string `'iso-8601'` or Python [strftime format][strftime] strings.
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Default: `['iso-8601']`
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#### DATE_FORMAT
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A format string that should be used by default for rendering the output of `DateField` serializer fields. If `None`, then `DateField` serializer fields will return Python `date` objects, and the date encoding will be determined by the renderer.
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May be any of `None`, `'iso-8601'` or a Python [strftime format][strftime] string.
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Default: `None`
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#### DATE_INPUT_FORMATS
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A list of format strings that should be used by default for parsing inputs to `DateField` serializer fields.
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May be a list including the string `'iso-8601'` or Python [strftime format][strftime] strings.
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Default: `['iso-8601']`
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#### TIME_FORMAT
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A format string that should be used by default for rendering the output of `TimeField` serializer fields. If `None`, then `TimeField` serializer fields will return Python `time` objects, and the time encoding will be determined by the renderer.
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May be any of `None`, `'iso-8601'` or a Python [strftime format][strftime] string.
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Default: `None`
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#### TIME_INPUT_FORMATS
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A list of format strings that should be used by default for parsing inputs to `TimeField` serializer fields.
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May be a list including the string `'iso-8601'` or Python [strftime format][strftime] strings.
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Default: `['iso-8601']`
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---
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## View names and descriptions
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**The following settings are used to generate the view names and descriptions, as used in responses to `OPTIONS` requests, and as used in the browsable API.**
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#### VIEW_NAME_FUNCTION
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A string representing the function that should be used when generating view names.
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This should be a function with the following signature:
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view_name(cls, suffix=None)
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* `cls`: The view class. Typically the name function would inspect the name of the class when generating a descriptive name, by accessing `cls.__name__`.
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* `suffix`: The optional suffix used when differentiating individual views in a viewset.
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Default: `'rest_framework.views.get_view_name'`
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#### VIEW_DESCRIPTION_FUNCTION
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A string representing the function that should be used when generating view descriptions.
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This setting can be changed to support markup styles other than the default markdown. For example, you can use it to support `rst` markup in your view docstrings being output in the browsable API.
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This should be a function with the following signature:
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view_description(cls, html=False)
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* `cls`: The view class. Typically the description function would inspect the docstring of the class when generating a description, by accessing `cls.__doc__`
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* `html`: A boolean indicating if HTML output is required. `True` when used in the browsable API, and `False` when used in generating `OPTIONS` responses.
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Default: `'rest_framework.views.get_view_description'`
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---
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## Miscellaneous settings
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#### EXCEPTION_HANDLER
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A string representing the function that should be used when returning a response for any given exception. If the function returns `None`, a 500 error will be raised.
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This setting can be changed to support error responses other than the default `{"detail": "Failure..."}` responses. For example, you can use it to provide API responses like `{"errors": [{"message": "Failure...", "code": ""} ...]}`.
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This should be a function with the following signature:
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exception_handler(exc)
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* `exc`: The exception.
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Default: `'rest_framework.views.exception_handler'`
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#### FORMAT_SUFFIX_KWARG
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The name of a parameter in the URL conf that may be used to provide a format suffix.
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Default: `'format'`
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#### NUM_PROXIES
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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 `None` then less strict IP matching will be used by the throttle classes.
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Default: `None`
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[cite]: http://www.python.org/dev/peps/pep-0020/
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[strftime]: http://docs.python.org/2/library/time.html#time.strftime
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