active_model_serializers/docs/general/configuration_options.md
L. Preston Sego III 6de3f31b6e Namespace separator setting for json-api and tests (#1874)
Adds jsonapi_namespace_separator configuration

Also:

* Enable getting type from record class without serializer

Needs Followup:

- https://github.com/rails-api/active_model_serializers/pull/1874#discussion_r74607042 
- https://github.com/rails-api/active_model_serializers/pull/1874#discussion_r74607734
2016-08-12 12:54:42 -05:00

119 lines
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[Back to Guides](../README.md)
# Configuration Options
The following configuration options can be set on
`ActiveModelSerializers.config`, preferably inside an initializer.
## General
##### adapter
The [adapter](adapters.md) to use.
Possible values:
- `:attributes` (default)
- `:json`
- `:json_api`
##### serializer_lookup_enabled
Enable automatic serializer lookup.
Possible values:
- `true` (default)
- `false`
When `false`, serializers must be explicitly specified.
##### key_transform
The [key transform](key_transforms.md) to use.
| Option | Result |
|----|----|
| `:camel` | ExampleKey |
| `:camel_lower` | exampleKey |
| `:dash` | example-key |
| `:unaltered` | the original, unaltered key |
| `:underscore` | example_key |
| `nil` | use the adapter default |
Each adapter has a default key transform configured:
| Adapter | Default Key Transform |
|----|----|
| `Json` | `:unaltered` |
| `JsonApi` | `:dash` |
`config.key_transform` is a global override of the adapter default. Adapters
still prefer the render option `:key_transform` over this setting.
*NOTE: Key transforms can be expensive operations. If key transforms are unnecessary for the
application, setting `config.key_transform` to `:unaltered` will provide a performance boost.*
##### default_includes
What relationships to serialize by default. Default: `'*'`, which includes one level of related
objects. See [includes](adapters.md#included) for more info.
## JSON API
##### jsonapi_resource_type
Sets whether the [type](http://jsonapi.org/format/#document-resource-identifier-objects)
of the resource should be `singularized` or `pluralized` when it is not
[explicitly specified by the serializer](https://github.com/rails-api/active_model_serializers/blob/master/docs/general/serializers.md#type)
Possible values:
- `:singular`
- `:plural` (default)
##### jsonapi_namespace_separator
Sets separator string for namespaced models to render `type` attribute.
| Separator | Example: Admin::User |
|----|----|
| `'-'` (default) | 'admin-users'
| `'--'` (recommended) | 'admin--users'
See [Recommendation for dasherizing (kebab-case-ing) namespaced object, such as `Admin::User`](https://github.com/json-api/json-api/issues/850)
for more discussion.
##### jsonapi_include_toplevel_object
Include a [top level jsonapi member](http://jsonapi.org/format/#document-jsonapi-object)
in the response document.
Possible values:
- `true`
- `false` (default)
##### jsonapi_version
The latest version of the spec to which the API conforms.
Default: `'1.0'`.
*Used when `jsonapi_include_toplevel_object` is `true`*
##### jsonapi_toplevel_meta
Optional top-level metadata. Not included if empty.
Default: `{}`.
*Used when `jsonapi_include_toplevel_object` is `true`*
## Hooks
To run a hook when ActiveModelSerializers is loaded, use
`ActiveSupport.on_load(:action_controller) do end`