Defines the OpenApiSpex.Schema.t type and operations for casting and validating against a schema.

The OpenApiSpex.schema macro can be used to declare schemas with an associated struct and JSON Encoder.

Examples

defmodule MyApp.Schemas do
  defmodule EmailString do
    @behaviour OpenApiSpex.Schema
    def schema do
      %OpenApiSpex.Schema {
        title: "EmailString",
        type: :string,
        format: :email
      }
    end
  end

  defmodule Person do
    require OpenApiSpex
    alias OpenApiSpex.{Reference, Schema}

    OpenApiSpex.schema(%{
      type: :object,
      required: [:name],
      properties: %{
        name: %Schema{type: :string},
        address: %Reference{"$ref": "#/components/schemas/Address"},
        age: %Schema{type: :integer, format: :int32, minimum: 0}
      }
    })
  end

  defmodule StringDictionary do
    @behaviour OpenApiSpex.Schema

    def schema() do
      %OpenApiSpex.Schema{
        type: :object,
        additionalProperties: %OpenApiSpex.Schema{
          type: :string
        }
      }
    end
  end

  defmodule PetCommon do
    require OpenApiSpex
    alias OpenApiSpex.{Schema, Discriminator}
    OpenApiSpex.schema(%{
      title: "PetCommon",
      description: "Properties common to all Pets",
      type: :object,
      properties: %{
        name: %Schema{type: :string},
        petType: %Schema{type: :string}
      },
      required: [:name, :petType]
    })
  end

  defmodule Cat do
    require OpenApiSpex
    alias OpenApiSpex.Schema
    OpenApiSpex.schema(%{
      title: "Cat",
      type: :object,
      description: "A representation of a cat. Note that `Cat` will be used as the discriminator value.",
      allOf: [
        PetCommon,
        %Schema{
          type: :object,
          properties: %{
            huntingSkill: %Schema{
              type: :string,
              description: "The measured skill for hunting",
              default: "lazy",
              enum: ["clueless", "lazy", "adventurous", "aggressive"]
            }
          },
          required: [:huntingSkill]
        }
      ]
    })
  end

  defmodule Dog do
    require OpenApiSpex
    alias OpenApiSpex.Schema
    OpenApiSpex.schema(%{
      type: :object,
      title: "Dog",
      description: "A representation of a dog. Note that `Dog` will be used as the discriminator value.",
      allOf: [
        PetCommon,
        %Schema {
          type: :object,
          properties: %{
            packSize: %Schema{
              type: :integer,
              format: :int32,
              description: "the size of the pack the dog is from",
              default: 0,
              minimum: 0
            }
          },
          required: [
            :packSize
          ]
        }
      ]
    })
  end

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