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.
A list or tuple of authentication classes, that determines the default set of authenticators used when accessing the `request.user` or `request.auth` properties.
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.
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')`
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.
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.
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.
When set to `True`, JSON responses will allow unicode characters in responses. For example:
{"unicode black star":"★"}
When set to `False`, JSON responses will escape non-ascii characters, like so:
{"unicode black star":"\u2605"}
Both styles conform to [RFC 4627][rfc4627], and are syntactically valid JSON. The unicode style is prefered as being more user-friendly when inspecting API responses.
Default: `True`
#### COMPACT_JSON
When set to `True`, JSON responses will return compact representations, with no spacing after `':'` and `','` characters. For example:
{"is_admin":false,"email":"jane@example"}
When set to `False`, JSON responses will return slightly more verbose representations, like so:
{"is_admin": false, "email": "jane@example"}
The default style is to return minified responses, in line with [Heroku's API design guidelines][heroku-minified-json].
Default: `True`
#### COERCE_DECIMAL_TO_STRING
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.
When set to `True`, the serializer `DecimalField` class will return strings instead of `Decimal` objects. When set to `False`, serializers will return `Decimal` objects, which the default JSON encoder will return as floats.
**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.**
#### VIEW_NAME_FUNCTION
A string representing the function that should be used when generating view names.
This should be a function with the following signature:
view_name(cls, suffix=None)
*`cls`: The view class. Typically the name function would inspect the name of the class when generating a descriptive name, by accessing `cls.__name__`.
*`suffix`: The optional suffix used when differentiating individual views in a viewset.
Default: `'rest_framework.views.get_view_name'`
#### VIEW_DESCRIPTION_FUNCTION
A string representing the function that should be used when generating view descriptions.
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.
This should be a function with the following signature:
view_description(cls, html=False)
*`cls`: The view class. Typically the description function would inspect the docstring of the class when generating a description, by accessing `cls.__doc__`
*`html`: A boolean indicating if HTML output is required. `True` when used in the browsable API, and `False` when used in generating `OPTIONS` responses.
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.
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": ""} ...]}`.
This should be a function with the following signature:
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.
