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	diff --git a/lib/open_api_spex/cast/discriminator.ex b/lib/open_api_spex/cast/discriminator.ex
	index 663a8fa..913b031 100644
	--- a/lib/open_api_spex/cast/discriminator.ex
	+++ b/lib/open_api_spex/cast/discriminator.ex
	@@ -1,101 +1,112 @@
	defmodule OpenApiSpex.Cast.Discriminator do
	@moduledoc """
	Defines the `OpenApiSpex.Discriminator.t` type.
	"""

	- alias OpenApiSpex.Cast
	+ alias OpenApiSpex.{Cast, Reference, Schema}

	@enforce_keys :propertyName
	defstruct [
	:propertyName,
	:mapping
	]

	@typedoc """
	[Discriminator Object](https://swagger.io/specification/#discriminatorObject)

	When request bodies or response payloads may be one of a number of different schemas,
	a discriminator object can be used to aid in serialization, deserialization, and validation.
	The discriminator is a specific object in a schema which is used to inform the consumer of the
	specification of an alternative schema based on the value associated with it.

	A discriminator requires a composite key be set on the schema:

	* `allOf`
	* `oneOf`
	* `anyOf`
	"""
	@type t :: %__MODULE__{
	propertyName: String.t(),
	mapping: %{String.t() => String.t()} \| nil
	}

	def cast(ctx) do
	case cast_discriminator(ctx) do
	{:ok, result} -> {:ok, result}
	error -> error
	end
	end

	defp cast_discriminator(%_{value: value, schema: schema} = ctx) do
	{discriminator_property, mappings} = discriminator_details(schema)

	case Map.pop(value, "#{discriminator_property}") do
	{"", _} ->
	error(:no_value_for_discriminator, ctx)

	{discriminator_value, _castable_value} ->
	# The cast specified by the composite key (allOf, anyOf, oneOf) MUST succeed
	# or return an error according to the Open API Spec.
	composite_ctx = %{
	ctx
	\| schema: %{schema \| discriminator: nil},
	path: ["#{discriminator_property}" \| ctx.path]
	}

	cast_composition(composite_ctx, ctx, discriminator_value, mappings)
	end
	end

	defp cast_composition(composite_ctx, ctx, discriminator_value, mappings) do
	with {composite_schemas, {:ok, _}} <- cast_composition(composite_ctx),
	%{} = schema <-
	find_discriminator_schema(discriminator_value, mappings, composite_schemas) do
	Cast.cast(%{composite_ctx \| schema: schema})
	else
	nil -> error(:invalid_discriminator_value, ctx)
	other -> other
	end
	end

	defp cast_composition(%_{schema: %{anyOf: schemas, discriminator: nil}} = ctx)
	when is_list(schemas),
	- do: {schemas, Cast.cast(ctx)}
	+ do: {schemas \|> _locate_schemas(ctx.schemas), Cast.cast(ctx)}

	defp cast_composition(%_{schema: %{allOf: schemas, discriminator: nil}} = ctx)
	when is_list(schemas),
	- do: {schemas, Cast.cast(ctx)}
	+ do: {schemas \|> _locate_schemas(ctx.schemas), Cast.cast(ctx)}

	defp cast_composition(%_{schema: %{oneOf: schemas, discriminator: nil}} = ctx)
	when is_list(schemas),
	- do: {schemas, Cast.cast(ctx)}
	+ do: {schemas \|> _locate_schemas(ctx.schemas), Cast.cast(ctx)}

	defp find_discriminator_schema(discriminator, mappings = %{}, schemas) do
	- with {:ok, "#/components/schemas/" <> name} <- Map.fetch(mappings, discriminator) do
	+ with {:ok, "#/components/schemas/" <> name} <- Map.fetch(mappings, discriminator) \|> IO.inspect(label: "the fetching got us this") do
	find_discriminator_schema(name, nil, schemas)
	else
	+ {:ok, name} -> find_discriminator_schema(name, nil, schemas)
	:error -> find_discriminator_schema(discriminator, nil, schemas)
	end
	end

	defp find_discriminator_schema(discriminator, _, schemas) do
	Enum.find(schemas, &Kernel.==(&1.title, discriminator))
	end

	defp discriminator_details(%{discriminator: %{propertyName: property_name, mapping: mappings}}),
	do: {String.to_existing_atom(property_name), mappings}

	defp error(message, %{schema: %{discriminator: %{propertyName: property}}} = ctx) do
	Cast.error(ctx, {message, property})
	end
	+
	+ defp _locate_schemas(schemas, ctx_schemas) do
	+ schemas
	+ \|> Enum.map(fn
	+ %Schema{} = schema ->
	+ schema
	+ %Reference{} = schema ->
	+ Reference.resolve_schema(schema, ctx_schemas)
	+ end)
	+ end
	end
	diff --git a/lib/open_api_spex/cast_parameters.ex b/lib/open_api_spex/cast_parameters.ex
	index cc84246..a2e7c1b 100644
	--- a/lib/open_api_spex/cast_parameters.ex
	+++ b/lib/open_api_spex/cast_parameters.ex
	@@ -1,104 +1,112 @@
	defmodule OpenApiSpex.CastParameters do
	@moduledoc false
	alias OpenApiSpex.{Cast, Operation, Parameter, Schema, Reference, Components}
	alias OpenApiSpex.Cast.{Error, Object}
	alias Plug.Conn

	@spec cast(Plug.Conn.t(), Operation.t(), Components.t()) ::
	{:error, [Error.t()]} \| {:ok, Conn.t()}
	def cast(conn, operation, components) do
	with {:ok, params} <- cast_to_params(conn, operation, components) do
	{:ok, %{conn \| params: params}}
	end
	end

	defp cast_to_params(conn, operation, components) do
	operation
	\|> schemas_by_location(components)
	\|> Enum.map(fn {location, schema} -> cast_location(location, schema, components, conn) end)
	\|> reduce_cast_results()
	end

	defp get_params_by_location(conn, :query, _) do
	Plug.Conn.fetch_query_params(conn).query_params
	end

	defp get_params_by_location(conn, :path, _) do
	conn.path_params
	end

	defp get_params_by_location(conn, :cookie, _) do
	Plug.Conn.fetch_cookies(conn).req_cookies
	end

	defp get_params_by_location(conn, :header, expected_names) do
	conn.req_headers
	\|> Enum.filter(fn {key, _value} ->
	Enum.member?(expected_names, String.downcase(key))
	end)
	\|> Map.new()
	end

	defp create_location_schema(parameters) do
	%Schema{
	type: :object,
	additionalProperties: false,
	properties: parameters \|> Map.new(fn p -> {p.name, Parameter.schema(p)} end),
	required: parameters \|> Enum.filter(& &1.required) \|> Enum.map(& &1.name)
	}
	\|> maybe_add_additional_properties()
	end

	defp schemas_by_location(operation, components) do
	param_specs_by_location =
	operation.parameters
	\|> Enum.map(fn
	- %Reference{} = ref -> Reference.resolve_parameter(ref, components.parameters)
	- %Parameter{} = param -> param
	+ %Parameter{schema: %Reference{"$ref": "#/components/parameters/" <> _}} = param ->
	+ schema = Reference.resolve_parameter(param.schema, components.parameter)
	+ param \|> Map.put(:schema, schema)
	+
	+ %Parameter{schema: %Reference{"$ref": "#/components/schemas/" <> _}} = param ->
	+ schema = Reference.resolve_schema(param.schema, components.schemas)
	+ param \|> Map.put(:schema, schema)
	+
	+ %Parameter{} = param ->
	+ param
	end)
	\|> Enum.group_by(& &1.in)

	Map.new(param_specs_by_location, fn {location, parameters} ->
	{location, create_location_schema(parameters)}
	end)
	end

	defp cast_location(location, schema, components, conn) do
	params =
	get_params_by_location(
	conn,
	location,
	schema.properties \|> Map.keys() \|> Enum.map(&Atom.to_string/1)
	)

	ctx = %Cast{
	value: params,
	schema: schema,
	schemas: components.schemas
	}

	Object.cast(ctx)
	end

	defp reduce_cast_results(results) do
	Enum.reduce_while(results, {:ok, %{}}, fn
	{:ok, params}, {:ok, all_params} -> {:cont, {:ok, Map.merge(all_params, params)}}
	cast_error, _ -> {:halt, cast_error}
	end)
	end

	defp maybe_add_additional_properties(schema) do
	ap_schema =
	Enum.reject(
	schema.properties,
	fn {_name, %{additionalProperties: ap}} ->
	is_nil(ap) or ap == false
	end
	)

	case ap_schema do
	[{_, %{additionalProperties: ap}}] -> %{schema \| additionalProperties: ap}
	_ -> schema
	end
	end
	end
	diff --git a/test/plug/cast_test.exs b/test/plug/cast_test.exs
	index 72a7824..03de35e 100644
	--- a/test/plug/cast_test.exs
	+++ b/test/plug/cast_test.exs
	@@ -1,268 +1,305 @@
	defmodule OpenApiSpex.Plug.CastTest do
	use ExUnit.Case
	+ @moduletag :stuff

	describe "query params - basics" do
	test "Valid Param" do
	conn =
	:get
	\|> Plug.Test.conn("/api/users?validParam=true")
	\|> OpenApiSpexTest.Router.call([])

	assert conn.status == 200
	end

	test "Invalid value" do
	conn =
	:get
	\|> Plug.Test.conn("/api/users?validParam=123")
	\|> OpenApiSpexTest.Router.call([])

	assert conn.status == 422
	end

	test "Invalid Param" do
	conn =
	:get
	\|> Plug.Test.conn("/api/users?validParam=123")
	\|> OpenApiSpexTest.Router.call([])

	assert conn.status == 422
	error_resp = Jason.decode!(conn.resp_body)

	assert error_resp == %{
	"errors" => [
	%{
	"message" => "Invalid boolean. Got: string",
	"source" => %{"pointer" => "/validParam"},
	"title" => "Invalid value"
	}
	]
	}
	end

	test "with requestBody" do
	body =
	Jason.encode!(%{
	phone_number: "123-456-789",
	postal_address: "123 Lane St"
	})

	conn =
	:post
	\|> Plug.Test.conn("/api/users/123/contact_info", body)
	\|> Plug.Conn.put_req_header("content-type", "application/json")
	\|> OpenApiSpexTest.Router.call([])

	assert conn.status == 200
	end
	end

	describe "query params - param with custom error handling" do
	test "Valid Param" do
	conn =
	:get
	\|> Plug.Test.conn("/api/custom_error_users?validParam=true")
	\|> OpenApiSpexTest.Router.call([])

	assert conn.status == 200
	end

	test "Invalid value" do
	conn =
	:get
	\|> Plug.Test.conn("/api/custom_error_users?validParam=123")
	\|> OpenApiSpexTest.Router.call([])

	assert conn.status == 400
	end

	test "Invalid Param" do
	conn =
	:get
	\|> Plug.Test.conn("/api/custom_error_users?validParam=123")
	\|> OpenApiSpexTest.Router.call([])

	assert conn.status == 400
	assert conn.resp_body == "Invalid boolean. Got: string"
	end
	end

	describe "body params" do
	test "Valid Request" do
	request_body = %{
	"user" => %{
	"id" => 123,
	"name" => "asdf",
	"email" => "foo@bar.com",
	"updated_at" => "2017-09-12T14:44:55Z"
	}
	}

	conn =
	:post
	\|> Plug.Test.conn("/api/users", Jason.encode!(request_body))
	\|> Plug.Conn.put_req_header("content-type", "application/json; charset=UTF-8")
	\|> OpenApiSpexTest.Router.call([])

	assert conn.body_params == %OpenApiSpexTest.Schemas.UserRequest{
	user: %OpenApiSpexTest.Schemas.User{
	id: 123,
	name: "asdf",
	email: "foo@bar.com",
	updated_at: ~N[2017-09-12T14:44:55Z] \|> DateTime.from_naive!("Etc/UTC")
	}
	}

	assert Jason.decode!(conn.resp_body) == %{
	"data" => %{
	"email" => "foo@bar.com",
	"id" => 1234,
	"inserted_at" => nil,
	"name" => "asdf",
	"updated_at" => "2017-09-12T14:44:55Z"
	}
	}
	end

	test "Invalid Request" do
	request_body = %{
	"user" => %{
	"id" => 123,
	"name" => "*1234",
	"email" => "foo@bar.com",
	"updated_at" => "2017-09-12T14:44:55Z"
	}
	}

	conn =
	:post
	\|> Plug.Test.conn("/api/users", Jason.encode!(request_body))
	\|> Plug.Conn.put_req_header("content-type", "application/json")

	conn = OpenApiSpexTest.Router.call(conn, [])
	assert conn.status == 422

	resp_data = Jason.decode!(conn.resp_body)

	assert resp_data ==
	%{
	"errors" => [
	%{
	"message" => "Invalid format. Expected ~r/[a-zA-Z][a-zA-Z0-9_]+/",
	"source" => %{"pointer" => "/user/name"},
	"title" => "Invalid value"
	}
	]
	}
	end
	end

	describe "oneOf body params" do
	+ @tag :stuff2
	test "Valid Request" do
	request_body = %{
	"pet" => %{
	"pet_type" => "Dog",
	"bark" => "woof"
	}
	}

	conn =
	:post
	\|> Plug.Test.conn("/api/pets", Jason.encode!(request_body))
	\|> Plug.Conn.put_req_header("content-type", "application/json; charset=UTF-8")
	\|> OpenApiSpexTest.Router.call([])

	assert conn.body_params == %OpenApiSpexTest.Schemas.PetRequest{
	pet: %OpenApiSpexTest.Schemas.Dog{
	pet_type: "Dog",
	bark: "woof"
	}
	}

	assert Jason.decode!(conn.resp_body) == %{
	"data" => %{
	"pet_type" => "Dog",
	"bark" => "woof"
	}
	}
	end

	@tag :capture_log
	test "Invalid Request" do
	request_body = %{
	"pet" => %{
	"pet_type" => "Human",
	"says" => "yes"
	}
	}

	conn =
	:post
	\|> Plug.Test.conn("/api/pets", Jason.encode!(request_body))
	\|> Plug.Conn.put_req_header("content-type", "application/json")

	conn = OpenApiSpexTest.Router.call(conn, [])
	assert conn.status == 422

	resp_body = Jason.decode!(conn.resp_body)

	assert resp_body == %{
	"errors" => [
	%{
	"source" => %{
	"pointer" => "/pet"
	},
	"title" => "Invalid value",
	"message" => "Failed to cast value to one of: [] (no schemas provided)"
	}
	]
	}
	end

	test "Header params" do
	conn =
	:post
	\|> Plug.Test.conn("/api/pets/1/adopt")
	\|> Plug.Conn.put_req_header("content-type", "application/json; charset=UTF-8")
	\|> Plug.Conn.put_req_header("x-user-id", "123456")
	\|> OpenApiSpexTest.Router.call([])

	assert Jason.decode!(conn.resp_body) == %{
	"data" => %{
	"pet_type" => "Dog",
	"bark" => "woof"
	}
	}
	end
	+
	+ test "Optional param" do
	+ conn =
	+ :post
	+ \|> Plug.Test.conn("/api/pets/1/adopt?status=adopted")
	+ \|> Plug.Conn.put_req_header("content-type", "application/json; charset=UTF-8")
	+ \|> Plug.Conn.put_req_header("x-user-id", "123456")
	+ \|> OpenApiSpexTest.Router.call([])
	+
	+ assert Jason.decode!(conn.resp_body) == %{
	+ "data" => %{
	+ "pet_type" => "Dog",
	+ "bark" => "woof"
	+ }
	+ }
	+ end
	+
	test "Cookie params" do
	conn =
	:post
	\|> Plug.Test.conn("/api/pets/1/adopt")
	\|> Plug.Conn.put_req_header("content-type", "application/json; charset=UTF-8")
	\|> Plug.Conn.put_req_header("x-user-id", "123456")
	\|> Plug.Conn.put_req_header("cookie", "debug=1")
	\|> OpenApiSpexTest.Router.call([])

	assert Jason.decode!(conn.resp_body) == %{
	"data" => %{
	"pet_type" => "Debug-Dog",
	"bark" => "woof"
	}
	}
	end

	+ @tag :stuff1
	+ test "Discriminator with mapping" do
	+ body =
	+ Jason.encode!(%{
	+ appointment_type: "grooming",
	+ hair_trim: true,
	+ nail_clip: false
	+ })
	+
	+ conn =
	+ :post
	+ \|> Plug.Test.conn("/api/pets/appointment", body)
	+ \|> Plug.Conn.put_req_header("content-type", "application/json")
	+ \|> OpenApiSpexTest.Router.call([])
	+
	+ assert Jason.decode!(conn.resp_body) == %{"data" => [%{"pet_type" => "Dog", "bark" => "bow wow"}]}
	+ end
	+
	test "freeForm params" do
	conn =
	:get
	\|> Plug.Test.conn("/api/utility/echo/any?one=this&two=cam&three=be&anything=true")
	\|> OpenApiSpexTest.Router.call([])

	assert Jason.decode!(conn.resp_body) == %{
	"one" => "this",
	"two" => "cam",
	"three" => "be",
	"anything" => "true"
	}
	end
	end
	end
	diff --git a/test/support/pet_controller.ex b/test/support/pet_controller.ex
	index 0707547..9d3a603 100644
	--- a/test/support/pet_controller.ex
	+++ b/test/support/pet_controller.ex
	@@ -1,128 +1,151 @@
	defmodule OpenApiSpexTest.PetController do
	use Phoenix.Controller
	alias OpenApiSpex.Operation
	alias OpenApiSpexTest.Schemas

	plug OpenApiSpex.Plug.CastAndValidate

	def open_api_operation(action) do
	apply(__MODULE__, :"#{action}_operation", [])
	end

	@doc """
	API Spec for :show action
	"""
	def show_operation() do
	import Operation

	%Operation{
	tags: ["pets"],
	summary: "Show pet",
	description: "Show a pet by ID",
	operationId: "PetController.show",
	parameters: [
	parameter(:id, :path, :integer, "Pet ID", example: 123, minimum: 1)
	],
	responses: %{
	200 => response("Pet", "application/json", Schemas.PetResponse)
	}
	}
	end

	def show(conn, %{id: _id}) do
	json(conn, %Schemas.PetResponse{
	data: %Schemas.Dog{
	pet_type: "Dog",
	bark: "woof"
	}
	})
	end

	def index_operation() do
	import Operation

	%Operation{
	tags: ["pets"],
	summary: "List pets",
	description: "List all petes",
	operationId: "PetController.index",
	parameters: [
	parameter(:validParam, :query, :boolean, "Valid Param", example: true)
	],
	responses: %{
	200 => response("Pet List Response", "application/json", Schemas.PetsResponse)
	}
	}
	end

	def index(conn, _params) do
	json(conn, %Schemas.PetsResponse{
	data: [
	%Schemas.Dog{
	pet_type: "Dog",
	bark: "joe@gmail.com"
	}
	]
	})
	end

	def create_operation() do
	import Operation

	%Operation{
	tags: ["pets"],
	summary: "Create pet",
	description: "Create a pet",
	operationId: "PetController.create",
	parameters: [],
	requestBody: request_body("The pet attributes", "application/json", Schemas.PetRequest),
	responses: %{
	201 => response("Pet", "application/json", Schemas.PetRequest)
	}
	}
	end

	def create(conn = %{body_params: %Schemas.PetRequest{pet: pet}}, _) do
	json(conn, %Schemas.PetResponse{
	data: pet
	})
	end

	def adopt_operation() do
	import Operation

	%Operation{
	tags: ["pets"],
	summary: "Adopt pet",
	description: "Adopt a pet",
	operationId: "PetController.adopt",
	parameters: [
	parameter(:"x-user-id", :header, :string, "User that performs this action", required: true),
	parameter(:id, :path, :integer, "Pet ID", example: 123, minimum: 1),
	- parameter(:status, :query, :string, "New status"),
	+ parameter(:status, :query, Schemas.PetStatus, "New status"),
	parameter(:debug, :cookie, %OpenApiSpex.Schema{type: :integer, enum: [0, 1], default: 0}, "Debug"),
	],
	responses: %{
	200 => response("Pet", "application/json", Schemas.PetRequest)
	}
	}
	end

	def adopt(conn, %{:"x-user-id" => _user_id, :id => _id, :debug => 0}) do
	json(conn, %Schemas.PetResponse{
	data: %Schemas.Dog{
	pet_type: "Dog",
	bark: "woof"
	}
	})
	end

	def adopt(conn, %{:"x-user-id" => _user_id, :id => _id, :debug => 1}) do
	json(conn, %Schemas.PetResponse{
	data: %Schemas.Dog{
	pet_type: "Debug-Dog",
	bark: "woof"
	}
	})
	end
	+
	+ def appointment_operation() do
	+ import Operation
	+
	+ %Operation{
	+ tags: ["pets"],
	+ summary: "Create pet",
	+ description: "Create a pet",
	+ operationId: "PetController.create",
	+ parameters: [],
	+ requestBody: request_body("The pet attributes", "application/json", Schemas.PetAppointmentRequest),
	+ responses: %{
	+ 201 => response("Pet", "application/json", Schemas.PetResponse)
	+ }
	+ }
	+ end
	+
	+ def appointment(conn = %{body_params: bp}, _) do
	+ bp \|> IO.inspect(label: "the body params I actually got..")
	+ json(conn, %Schemas.PetResponse{
	+ data: [%{pet_type: "Dog", bark: "bow wow"}]
	+})
	+ end
	end
	diff --git a/test/support/router.ex b/test/support/router.ex
	index d6528cf..159a457 100644
	--- a/test/support/router.ex
	+++ b/test/support/router.ex
	@@ -1,29 +1,30 @@
	defmodule OpenApiSpexTest.Router do
	use Phoenix.Router
	alias Plug.Parsers
	alias OpenApiSpex.Plug.{PutApiSpec, RenderSpec}

	pipeline :api do
	plug :accepts, ["json"]
	plug PutApiSpec, module: OpenApiSpexTest.ApiSpec
	plug Parsers, parsers: [:json], pass: ["text/*"], json_decoder: Jason
	end

	scope "/api", OpenApiSpexTest do
	pipe_through :api
	resources "/users", UserController, only: [:create, :index, :show]

	# Used by ParamsTest
	resources "/custom_error_users", CustomErrorUserController, only: [:index]

	get "/users/:id/payment_details", UserController, :payment_details
	post "/users/:id/contact_info", UserController, :contact_info
	post "/users/create_entity", UserController, :create_entity
	get "/openapi", RenderSpec, []

	resources "/pets", PetController, only: [:create, :index, :show]
	post "/pets/:id/adopt", PetController, :adopt
	+ post "/pets/appointment", PetController, :appointment

	get "/utility/echo/any", UtilityController, :echo_any
	end
	end
	diff --git a/test/support/schemas.ex b/test/support/schemas.ex
	index ed2003a..b6eccef 100644
	--- a/test/support/schemas.ex
	+++ b/test/support/schemas.ex
	@@ -1,409 +1,498 @@
	defmodule OpenApiSpexTest.Schemas do
	require OpenApiSpex
	alias OpenApiSpex.Reference
	alias OpenApiSpex.Schema

	defmodule Helper do
	def prepare_struct([%Reference{"$ref": "#/components/schemas/" <> name} \| tail]) do
	schema =
	apply(String.to_existing_atom("Elixir.OpenApiSpexTest.Schemas." <> name), :schema, [])

	prepare_struct([schema \| tail])
	end

	def prepare_struct([%Schema{properties: props} \| tail]) when is_map(props) do
	keys = Map.keys(props)
	keys ++ prepare_struct(tail)
	end

	def prepare_struct([%Schema{allOf: allOf} \| tail]) when is_list(allOf) do
	prepare_struct(allOf ++ tail)
	end

	def prepare_struct([module_name \| tail]) when is_atom(module_name) do
	prepare_struct([module_name.schema() \| tail])
	end

	def prepare_struct([]) do
	[]
	end
	end

	defmodule Size do
	OpenApiSpex.schema(%{
	title: "Size",
	description: "A size of a pet",
	type: :object,
	properties: %{
	unit: %Schema{type: :string, description: "SI unit name", default: "cm"},
	value: %Schema{type: :integer, description: "Size in given unit", default: 100}
	},
	required: [:unit, :value]
	})
	end

	defmodule User do
	OpenApiSpex.schema(%{
	title: "User",
	description: "A user of the app",
	type: :object,
	properties: %{
	id: %Schema{type: :integer, description: "User ID"},
	name: %Schema{type: :string, description: "User name", pattern: ~r/[a-zA-Z][a-zA-Z0-9_]+/},
	email: %Schema{type: :string, description: "Email address", format: :email},
	inserted_at: %Schema{
	type: :string,
	description: "Creation timestamp",
	format: :"date-time"
	},
	updated_at: %Schema{type: :string, description: "Update timestamp", format: :"date-time"}
	},
	required: [:name, :email],
	additionalProperties: false,
	example: %{
	"id" => 123,
	"name" => "Joe User",
	"email" => "joe@gmail.com",
	"inserted_at" => "2017-09-12T12:34:55Z",
	"updated_at" => "2017-09-13T10:11:12Z"
	}
	})
	end

	defmodule ContactInfo do
	OpenApiSpex.schema(%{
	title: "ContactInfo",
	description: "A users contact information",
	type: :object,
	properties: %{
	phone_number: %Schema{type: :string, description: "Phone number"},
	postal_address: %Schema{type: :string, description: "Postal address"}
	},
	required: [:phone_number],
	additionalProperties: false,
	example: %{
	"phone_number" => "555-123-456",
	"postal_address" => "123 Evergreen Tce"
	}
	})
	end

	defmodule CreditCardPaymentDetails do
	OpenApiSpex.schema(%{
	title: "CreditCardPaymentDetails",
	description: "Payment details when using credit-card method",
	type: :object,
	properties: %{
	credit_card_number: %Schema{type: :string, description: "Credit card number"},
	name_on_card: %Schema{type: :string, description: "Name as appears on card"},
	expiry: %Schema{type: :string, description: "4 digit expiry MMYY"}
	},
	required: [:credit_card_number, :name_on_card, :expiry],
	example: %{
	"credit_card_number" => "1234-5678-1234-6789",
	"name_on_card" => "Joe User",
	"expiry" => "1234"
	}
	})
	end

	defmodule DirectDebitPaymentDetails do
	OpenApiSpex.schema(%{
	title: "DirectDebitPaymentDetails",
	description: "Payment details when using direct-debit method",
	type: :object,
	properties: %{
	account_number: %Schema{type: :string, description: "Bank account number"},
	account_name: %Schema{type: :string, description: "Name of account"},
	bsb: %Schema{type: :string, description: "Branch identifier"}
	},
	required: [:account_number, :account_name, :bsb],
	example: %{
	"account_number" => "12349876",
	"account_name" => "Joes Savings Account",
	"bsb" => "123-4567"
	}
	})
	end

	defmodule PaymentDetails do
	OpenApiSpex.schema(%{
	title: "PaymentDetails",
	description: "Abstract Payment details type",
	type: :object,
	oneOf: [
	CreditCardPaymentDetails,
	DirectDebitPaymentDetails
	]
	})
	end

	defmodule UserRequest do
	OpenApiSpex.schema(%{
	title: "UserRequest",
	description: "POST body for creating a user",
	type: :object,
	properties: %{
	user: User
	},
	example: %{
	"user" => %{
	"name" => "Joe User",
	"email" => "joe@gmail.com"
	}
	}
	})
	end

	defmodule UserResponse do
	OpenApiSpex.schema(%{
	title: "UserResponse",
	description: "Response schema for single user",
	type: :object,
	properties: %{
	data: User
	},
	example: %{
	"data" => %{
	"id" => 123,
	"name" => "Joe User",
	"email" => "joe@gmail.com",
	"inserted_at" => "2017-09-12T12:34:55Z",
	"updated_at" => "2017-09-13T10:11:12Z"
	}
	}
	})
	end

	defmodule UsersResponse do
	OpenApiSpex.schema(%{
	title: "UsersResponse",
	description: "Response schema for multiple users",
	type: :object,
	properties: %{
	data: %Schema{description: "The users details", type: :array, items: User}
	},
	example: %{
	"data" => [
	%{
	"id" => 123,
	"name" => "Joe User",
	"email" => "joe@gmail.com"
	},
	%{
	"id" => 456,
	"name" => "Jay Consumer",
	"email" => "jay@yahoo.com"
	}
	]
	}
	})
	end

	defmodule EntityWithDict do
	OpenApiSpex.schema(%{
	title: "EntityWithDict",
	description: "Entity with a dictionary defined via additionalProperties",
	type: :object,
	properties: %{
	id: %Schema{type: :integer, description: "Entity ID"},
	stringDict: %Schema{
	type: :object,
	description: "String valued dict",
	additionalProperties: %Schema{type: :string}
	},
	anyTypeDict: %Schema{
	type: :object,
	description: "Untyped valued dict",
	additionalProperties: true
	}
	},
	example: %{
	"id" => 123,
	"stringDict" => %{"key1" => "value1", "key2" => "value2"},
	"anyTypeDict" => %{"key1" => 42, "key2" => %{"foo" => "bar"}}
	}
	})
	end

	defmodule PetType do
	require OpenApiSpex

	OpenApiSpex.schema(%{
	title: "PetType",
	type: :object,
	required: [:pet_type],
	properties: %{
	pet_type: %Schema{
	type: :string
	}
	}
	})
	end

	defmodule Cat do
	alias OpenApiSpex.Schema

	@behaviour OpenApiSpex.Schema
	@derive [Jason.Encoder]
	@schema %Schema{
	title: "Cat",
	type: :object,
	allOf: [
	PetType,
	%Schema{
	type: :object,
	properties: %{
	meow: %Schema{type: :string}
	},
	required: [:meow]
	}
	],
	"x-struct": __MODULE__
	}

	def schema, do: @schema
	defstruct OpenApiSpexTest.Schemas.Helper.prepare_struct(@schema.allOf)
	end

	defmodule Dog do
	alias OpenApiSpex.Schema

	@behaviour OpenApiSpex.Schema
	@derive [Jason.Encoder]
	@schema %Schema{
	title: "Dog",
	type: :object,
	allOf: [
	PetType,
	%Schema{
	type: :object,
	properties: %{
	bark: %Schema{type: :string}
	},
	required: [:bark]
	}
	],
	"x-struct": __MODULE__
	}

	def schema, do: @schema
	defstruct OpenApiSpexTest.Schemas.Helper.prepare_struct(@schema.allOf)
	end

	defmodule CatOrDog do
	require OpenApiSpex

	OpenApiSpex.schema(%{
	title: "CatOrDog",
	oneOf: [Cat, Dog]
	})
	end

	defmodule Array do
	require OpenApiSpex

	OpenApiSpex.schema(%{
	title: "Array",
	type: :array,
	items: Dog,
	example: [%{pet_type: "Dog", bark: "A lot"}]
	})
	end

	defmodule Primitive do
	require OpenApiSpex

	OpenApiSpex.schema(%{
	title: "Primitive",
	type: :integer,
	example: 1
	})
	end

	defmodule PrimitiveArray do
	require OpenApiSpex

	OpenApiSpex.schema(%{
	title: "PrimitiveArray",
	type: :array,
	items: %Schema{type: "string"},
	example: ["Foo"]
	})
	end

	defmodule PetResponse do
	OpenApiSpex.schema(%{
	title: "PetResponse",
	description: "Response schema for single pet",
	type: :object,
	properties: %{
	data: OpenApiSpexTest.Schemas.CatOrDog
	},
	example: %{
	"data" => %{
	"pet_type" => "Dog",
	"bark" => "woof"
	}
	}
	})
	end

	defmodule Pet do
	require OpenApiSpex
	alias OpenApiSpex.{Schema, Discriminator}

	OpenApiSpex.schema(%{
	title: "Pet",
	type: :object,
	oneOf: [Cat, Dog],
	discriminator: %Discriminator{
	propertyName: "pet_type"
	}
	})
	end

	defmodule PetsResponse do
	OpenApiSpex.schema(%{
	title: "PetsResponse",
	description: "Response schema for multiple pets",
	type: :object,
	properties: %{
	data: %Schema{
	description: "The pets details",
	type: :array,
	items: OpenApiSpexTest.Schemas.CatOrDog
	}
	},
	example: %{
	"data" => [
	%{
	"pet_type" => "Dog",
	"bark" => "woof"
	},
	%{
	"pet_type" => "Cat",
	"meow" => "meow"
	}
	]
	}
	})
	end

	defmodule PetRequest do
	OpenApiSpex.schema(%{
	title: "PetRequest",
	description: "POST body for creating a pet",
	type: :object,
	properties: %{
	pet: CatOrDog
	},
	example: %{
	"pet" => %{
	"pet_type" => "Dog",
	"bark" => "woof"
	}
	}
	})
	end
	+
	+ defmodule PetStatus do
	+ OpenApiSpex.schema(%{
	+ title: "PetStatus",
	+ description: "The current status of a pet",
	+ type: :string,
	+ enum: ["adopted", "unadopted"]
	+ })
	+ end
	+
	+ defmodule AppointmentType do
	+ require OpenApiSpex
	+
	+ OpenApiSpex.schema(%{
	+ title: "AppointmentType",
	+ type: :object,
	+ properties: %{
	+ appointment_type: %Schema{
	+ type: :string
	+ }
	+ },
	+ required: [:appointment_type]
	+ })
	+ end
	+
	+ defmodule TrainingAppointment do
	+ OpenApiSpex.schema(%{
	+ title: "TrainingAppointment",
	+ description: "Request for a training appointment",
	+ type: :object,
	+ allOf: [
	+ AppointmentType,
	+ %Schema{
	+ type: :object,
	+ properties: %{
	+ level: %Schema{
	+ description: "The level of training",
	+ type: :integer
	+ }
	+ },
	+ required: [:level]
	+ }
	+ ]
	+ })
	+ end
	+
	+ defmodule GroomingAppointment do
	+ OpenApiSpex.schema(%{
	+ title: "GroomingAppointment",
	+ description: "Request for a training appointment",
	+ type: :object,
	+ allOf: [
	+ AppointmentType,
	+ %Schema{
	+ type: :object,
	+ properties: %{
	+ hair_trim: %Schema{
	+ description: "Whether or not to include a hair trim",
	+ type: :boolean
	+ },
	+ nail_clip: %Schema{
	+ description: "Whether or not to include nail clip",
	+ type: :boolean
	+ }
	+ },
	+ required: [:hair_trim, :nail_clip]
	+ }
	+ ]
	+ })
	+ end
	+
	+ defmodule PetAppointmentRequest do
	+ OpenApiSpex.schema(%{
	+ title: "PetAppointmentRequest",
	+ description: "POST body for making a pet appointment",
	+ type: :object,
	+ oneOf: [
	+ TrainingAppointment,
	+ GroomingAppointment
	+ ],
	+ discriminator: %OpenApiSpex.Discriminator{
	+ propertyName: "appointment_type",
	+ mapping: %{
	+ "training" => "TrainingAppointment",
	+ "grooming" => "GroomingAppointment"
	+ }
	+ }
	+ })
	+ end
	end

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