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# @typespec/rest
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TypeSpec REST protocol binding
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## Install
```bash
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npm install @typespec/rest
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```
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## Decorators
### TypeSpec.Rest
- [`@action` ](#@action )
- [`@actionSeparator` ](#@actionseparator )
- [`@autoRoute` ](#@autoroute )
- [`@collectionAction` ](#@collectionaction )
- [`@copyResourceKeyParameters` ](#@copyresourcekeyparameters )
- [`@createsOrReplacesResource` ](#@createsorreplacesresource )
- [`@createsOrUpdatesResource` ](#@createsorupdatesresource )
- [`@createsResource` ](#@createsresource )
- [`@deletesResource` ](#@deletesresource )
- [`@listsResource` ](#@listsresource )
- [`@parentResource` ](#@parentresource )
- [`@readsResource` ](#@readsresource )
- [`@resource` ](#@resource )
- [`@segment` ](#@segment )
- [`@segmentOf` ](#@segmentof )
- [`@updatesResource` ](#@updatesresource )
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#### `@action`
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Specify this operation is an action. (Scoped to a resource item /pets/{petId}/my-action)
```typespec
@TypeSpec .Rest.action(name?: valueof string)
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```
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##### Target
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`Operation`
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##### Parameters
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| Name | Type | Description |
| ---- | ---------------- | ----------------------------------------------------------------------------- |
| name | `valueof string` | Name of the action. If not specified, the name of the operation will be used. |
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#### `@actionSeparator`
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Defines the separator string that is inserted before the action name in auto-generated routes for actions.
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```typespec
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@TypeSpec .Rest.actionSeparator(seperator: valueof "/" | ":" | "/:")
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```
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##### Target
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`Model | ModelProperty | Operation`
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##### Parameters
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| Name | Type | Description |
| --------- | ---------------------------- | ---------------------------------------------------------------- |
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| seperator | `valueof "/" \| ":" \| "/:"` | Seperator seperating the action segment from the rest of the url |
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#### `@autoRoute`
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This interface or operation should resolve its route automatically. To be used with resource types where the route segments area defined on the models.
```typespec
@TypeSpec .Rest.autoRoute
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```
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##### Target
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`Interface | Operation`
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##### Parameters
None
##### Examples
```typespec
@autoRoute
interface Pets {
get(@segment("pets") @path id: string): void; //-> route: /pets/{id}
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}
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```
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#### `@collectionAction`
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Specify this operation is a collection action. (Scopped to a resource, /pets/my-action)
```typespec
@TypeSpec .Rest.collectionAction(resourceType: Model, name?: valueof string)
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```
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##### Target
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`Operation`
##### Parameters
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| Name | Type | Description |
| ------------ | ---------------- | ----------------------------------------------------------------------------- |
| resourceType | `Model` | Resource marked with |
| name | `valueof string` | Name of the action. If not specified, the name of the operation will be used. |
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#### `@copyResourceKeyParameters`
Copy the resource key parameters on the model
```typespec
@TypeSpec .Rest.copyResourceKeyParameters(filter?: valueof string)
```
##### Target
`Model`
##### Parameters
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| Name | Type | Description |
| ------ | ---------------- | ------------------------------------- |
| filter | `valueof string` | Filter to exclude certain properties. |
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#### `@createsOrReplacesResource`
Specify that this is a CreateOrReplace operation for a given resource.
```typespec
@TypeSpec .Rest.createsOrReplacesResource(resourceType: Model)
```
##### Target
`Operation`
##### Parameters
| Name | Type | Description |
| ------------ | ------- | -------------------- |
| resourceType | `Model` | Resource marked with |
#### `@createsOrUpdatesResource`
Specify that this is a CreatesOrUpdate operation for a given resource.
```typespec
@TypeSpec .Rest.createsOrUpdatesResource(resourceType: Model)
```
##### Target
`Operation`
##### Parameters
| Name | Type | Description |
| ------------ | ------- | -------------------- |
| resourceType | `Model` | Resource marked with |
#### `@createsResource`
Specify that this is a Create operation for a given resource.
```typespec
@TypeSpec .Rest.createsResource(resourceType: Model)
```
##### Target
`Operation`
##### Parameters
| Name | Type | Description |
| ------------ | ------- | -------------------- |
| resourceType | `Model` | Resource marked with |
#### `@deletesResource`
Specify that this is a Delete operation for a given resource.
```typespec
@TypeSpec .Rest.deletesResource(resourceType: Model)
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```
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##### Target
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`Operation`
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##### Parameters
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| Name | Type | Description |
| ------------ | ------- | -------------------- |
| resourceType | `Model` | Resource marked with |
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#### `@listsResource`
Specify that this is a List operation for a given resource.
```typespec
@TypeSpec .Rest.listsResource(resourceType: Model)
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```
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##### Target
`Operation`
##### Parameters
| Name | Type | Description |
| ------------ | ------- | -------------------- |
| resourceType | `Model` | Resource marked with |
#### `@parentResource`
Mark model as a child of the given parent resource.
```typespec
@TypeSpec .Rest.parentResource(parent: Model)
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```
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##### Target
`Model`
##### Parameters
| Name | Type | Description |
| ------ | ------- | ------------- |
| parent | `Model` | Parent model. |
#### `@readsResource`
Specify that this is a Read operation for a given resource.
```typespec
@TypeSpec .Rest.readsResource(resourceType: Model)
```
##### Target
`Operation`
##### Parameters
| Name | Type | Description |
| ------------ | ------- | -------------------- |
| resourceType | `Model` | Resource marked with |
#### `@resource`
Mark this model as a resource type with a name.
```typespec
@TypeSpec .Rest.resource(collectionName: valueof string)
```
##### Target
`Model`
##### Parameters
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| Name | Type | Description |
| -------------- | ---------------- | ---------------------- |
| collectionName | `valueof string` | type's collection name |
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#### `@segment`
Defines the preceding path segment for a
```typespec
@TypeSpec .Rest.segment(name: valueof string)
```
##### Target
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`Model | ModelProperty | Operation`
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##### Parameters
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| Name | Type | Description |
| ---- | ---------------- | ---------------------------------------------------------------------------------------------- |
| name | `valueof string` | Segment that will be inserted into the operation route before the path parameter's name field. |
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##### Examples
#### `@segmentOf`
Returns the URL segment of a given model if it has `@segment` and `@key` decorator.
```typespec
@TypeSpec .Rest.segmentOf(type: Model)
```
##### Target
`Operation`
##### Parameters
| Name | Type | Description |
| ---- | ------- | ------------ |
| type | `Model` | Target model |
#### `@updatesResource`
Specify that this is a Update operation for a given resource.
```typespec
@TypeSpec .Rest.updatesResource(resourceType: Model)
```
##### Target
`Operation`
##### Parameters
| Name | Type | Description |
| ------------ | ------- | -------------------- |
| resourceType | `Model` | Resource marked with |