AshOaskit.RelationshipRoutes (AshOasKit v0.2.0)

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Generates OpenAPI path operations for JSON:API relationship routes.

This module handles the generation of OpenAPI specifications for relationship endpoints as defined by the JSON:API specification. These endpoints allow clients to manage relationships between resources independently of the resource attributes.

JSON:API Relationship Routes

JSON:API defines several types of relationship operations:

These routes return the actual related resources:

GET /posts/:id/comments

Returns the full Comment resources that are related to the Post.

Relationship Routes

These routes operate on the relationship linkage itself:

GET /posts/:id/relationships/comments
POST /posts/:id/relationships/comments
PATCH /posts/:id/relationships/comments
DELETE /posts/:id/relationships/comments

These endpoints work with resource identifier objects (type + id only), not full resource representations.

Route Types

The following AshJsonApi route types are supported:

  • :related - GET request returning related resources
  • :relationship - GET request returning relationship linkage
  • :post_to_relationship - POST to add to a to-many relationship
  • :patch_relationship - PATCH to replace relationship linkage
  • :delete_from_relationship - DELETE to remove from a to-many relationship

Module Organization

This module delegates to focused submodules:

Usage

# Check if a route is a relationship route
RelationshipRoutes.relationship_route?(route)

# Build operation for a relationship route
operation = RelationshipRoutes.build_operation(route, opts)

# Build the path pattern for a relationship route
path = RelationshipRoutes.build_path(route)

Schema Generation

Relationship routes use specific schema patterns:

Resource Identifier Object

%{
  type: :object,
  required: ["type", "id"],
  properties: %{
    "type" => %{type: :string},
    "id" => %{type: :string}
  }
}

Relationship Linkage Response

%{
  type: :object,
  properties: %{
    "data" => resource_identifier_or_array,
    "links" => %{
      "self" => %{type: :string},
      "related" => %{type: :string}
    }
  }
}

Summary

Functions

build_operation(route, opts \\ [])

Builds an OpenAPI operation object for a relationship route.

build_related_response_schema(relationship, opts)

Builds a related resources response schema.

build_relationship_linkage_schema(relationship, opts)

Builds a relationship linkage schema for response/request bodies.

build_relationship_response_schema(relationship, opts)

Builds a full relationship response schema with data and links.

build_resource_identifier_schema(resource_type)

Builds the resource identifier schema for a resource type.

relationship_route?(route)

Checks if the given route is a relationship route.

route_method(route)

Builds the HTTP method for a relationship route.

Functions

build_operation(route, opts \\ [])

@spec build_operation(
  map(),
  keyword()
) :: map()

Builds an OpenAPI operation object for a relationship route.

Generates the appropriate request/response schemas based on the relationship type and route operation.

Delegates to AshOaskit.RelationshipRoutes.RouteOperations.build_operation/2.

Parameters

  • route - An AshJsonApi route struct
  • opts - Options keyword list
    • :version - OpenAPI version ("3.0" or "3.1", defaults to "3.1")

Returns

A map representing the OpenAPI operation object.

Examples

RelationshipRoutes.build_operation(%{type: :related, ...}, [])
# => %{
#      operationId: "post_comments_related",
#      summary: "Get related comments",
#      ...
#    }

build_relationship_linkage_schema(relationship, opts)

@spec build_relationship_linkage_schema(
  map() | struct(),
  keyword()
) :: map()

Builds a relationship linkage schema for response/request bodies.

For to-one relationships, returns a single resource identifier or null. For to-many relationships, returns an array of resource identifiers.

Delegates to AshOaskit.RelationshipRoutes.RouteResponses.build_relationship_linkage_schema/2.

Parameters

  • relationship - The Ash relationship struct
  • opts - Options keyword list including :version

Returns

An OpenAPI schema object for relationship linkage.

build_relationship_response_schema(relationship, opts)

@spec build_relationship_response_schema(
  map() | struct(),
  keyword()
) :: map()

Builds a full relationship response schema with data and links.

Delegates to AshOaskit.RelationshipRoutes.RouteResponses.build_relationship_response_schema/2.

Parameters

  • relationship - The Ash relationship struct
  • opts - Options keyword list

Returns

An OpenAPI schema object for a relationship response.

build_resource_identifier_schema(resource_type)

@spec build_resource_identifier_schema(String.t()) :: map()

Builds the resource identifier schema for a resource type.

A resource identifier object contains only the type and id fields, as defined by JSON:API for relationship linkage.

Delegates to AshOaskit.RelationshipRoutes.RouteResponses.build_resource_identifier_schema/1.

Parameters

  • resource_type - The JSON:API type name (string)

Returns

An OpenAPI schema object for a resource identifier.

Examples

iex> RelationshipRoutes.build_resource_identifier_schema("comment")
%{
  type: :object,
  required: ["type", "id"],
  properties: %{
    "type" => %{type: :string, enum: ["comment"]},
    "id" => %{type: :string, description: "The unique identifier of the resource"}
  }
}

relationship_route?(route)

@spec relationship_route?(map()) :: boolean()

Checks if the given route is a relationship route.

Returns true if the route type is one of the relationship route types, false otherwise.

Parameters

  • route - An AshJsonApi route struct

Returns

Boolean indicating if this is a relationship route.

Examples

iex> RelationshipRoutes.relationship_route?(%{type: :related})
true

iex> RelationshipRoutes.relationship_route?(%{type: :index})
false

route_method(route)

@spec route_method(map()) :: String.t()

Builds the HTTP method for a relationship route.

Parameters

  • route - An AshJsonApi route struct

Returns

The HTTP method as a lowercase string.

Examples

iex> RelationshipRoutes.route_method(%{type: :related})
"get"

iex> RelationshipRoutes.route_method(%{type: :post_to_relationship})
"post"