Class: ElasticGraph::SchemaDefinition::SchemaElements::EnumType

Inherits:
Struct
  • Object
show all
Includes:
Mixins::CanBeGraphQLOnly, Mixins::HasDerivedGraphQLTypeCustomizations, Mixins::HasDirectives, Mixins::HasDocumentation, Mixins::VerifiesGraphQLName
Defined in:
elasticgraph-schema_definition/lib/elastic_graph/schema_definition/schema_elements/enum_type.rb

Overview

Defines a GraphQL enum type. The type is restricted to an enumerated set of values, each with a unique name. Use value or values to define the enum values in the passed block.

Note: if required by your configuration, this may generate a pair of Enum types (an input enum and an output enum).

Examples:

Define an enum type

ElasticGraph.define_schema do |schema|
  schema.enum_type "Currency" do |t|
    # in the block, `t` is an EnumType
    t.value "USD"
  end
end

Instance Attribute Summary collapse

Attributes included from Mixins::HasDocumentation

#doc_comment

Instance Method Summary collapse

Methods included from Mixins::HasDerivedGraphQLTypeCustomizations

#customize_derived_type_fields, #customize_derived_types

Methods included from Mixins::HasDirectives

#directive, #directives, #directives_sdl

Methods included from Mixins::HasDocumentation

#append_to_documentation, #derived_documentation, #documentation, #formatted_documentation

Methods included from Mixins::CanBeGraphQLOnly

#graphql_only, #graphql_only?

Methods included from Mixins::VerifiesGraphQLName

verify_name!

Instance Attribute Details

#for_output ⇒ Boolean

Returns true if this enum is used for both input and output; false if it is for input only.

Returns:

  • (Boolean) —

    true if this enum is used for both input and output; false if it is for input only



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# File 'elasticgraph-schema_definition/lib/elastic_graph/schema_definition/schema_elements/enum_type.rb', line 39

class EnumType < Struct.new(:schema_def_state, :type_ref, :for_output, :values_by_name)
  # @dynamic type_ref, graphql_only?
  prepend Mixins::VerifiesGraphQLName
  include Mixins::CanBeGraphQLOnly
  include Mixins::HasDocumentation
  include Mixins::HasDirectives
  include Mixins::HasDerivedGraphQLTypeCustomizations
  include Mixins::HasReadableToSAndInspect.new { |e| e.name }

  # @private
  def initialize(schema_def_state, name)
    # @type var values_by_name: ::Hash[::String, EnumValue]
    values_by_name = {}
    super(schema_def_state, schema_def_state.type_ref(name).to_final_form, true, values_by_name)

    # :nocov: -- currently all invocations have a block
    yield self if block_given?
    # :nocov:
  end

  # @return [String] name of the enum type
  def name
    type_ref.name
  end

  # @return [TypeReference] reference to `AggregatedValues` type to use for this enum.
  def aggregated_values_type
    schema_def_state.type_ref("NonNumeric").as_aggregated_values
  end

  # Defines an enum value for the current enum type.
  #
  # @param value_name [String] name of the enum value
  # @yield [EnumValue] enum value so it can be further customized
  # @return [void]
  #
  # @example Define an enum type with multiple enum values
  #   ElasticGraph.define_schema do |schema|
  #     schema.enum_type "Currency" do |t|
  #       t.value "USD" do |v|
  #         v.documentation "US Dollars."
  #       end
  #
  #       t.value "JPY" do |v|
  #         v.documentation "Japanese Yen."
  #       end
  #     end
  #   end
  def value(value_name, &block)
    alternate_original_name = value_name
    value_name = schema_def_state.enum_value_namer.name_for(name, value_name.to_s)

    if values_by_name.key?(value_name)
      raise Errors::SchemaError, "Duplicate value on Enum::Type #{name}: #{value_name}"
    end

    if value_name.length > DEFAULT_MAX_KEYWORD_LENGTH
      raise Errors::SchemaError, "Enum value `#{name}.#{value_name}` is too long: it is #{value_name.length} characters but cannot exceed #{DEFAULT_MAX_KEYWORD_LENGTH} characters."
    end

    values_by_name[value_name] = schema_def_state.factory.new_enum_value(value_name, alternate_original_name, &block)
  end

  # Defines multiple enum values. In contrast to {#value}, the enum values cannot be customized
  # further via a block.
  #
  # @param value_names [Array<String>] names of the enum values
  # @return [void]
  #
  # @example Define an enum type with multiple enum values
  #   ElasticGraph.define_schema do |schema|
  #     schema.enum_type "Currency" do |t|
  #       t.values "USD", "JPY", "CAD", "GBP"
  #     end
  #   end
  def values(*value_names)
    value_names.flatten.each { |name| value(name) }
  end

  # @return [SchemaArtifacts::RuntimeMetadata::Enum::Type] runtime metadata for this enum type
  def runtime_metadata
    runtime_metadata_values_by_name = values_by_name
      .transform_values(&:runtime_metadata)
      .compact

    SchemaArtifacts::RuntimeMetadata::Enum::Type.new(values_by_name: runtime_metadata_values_by_name)
  end

  # @return [String] GraphQL SDL form of the enum type
  def to_sdl
    if values_by_name.empty?
      raise Errors::SchemaError, "Enum type #{name} has no values, but enums must have at least one value."
    end

    <<~EOS
      #{formatted_documentation}enum #{name} #{directives_sdl(suffix_with: " ")}{
        #{values_by_name.values.map(&:to_sdl).flat_map { |s| s.split("\n") }.join("\n  ")}
      }
    EOS
  end

  # @private
  def derived_graphql_types
    # Derived GraphQL types must be generated for an output enum. For an enum type that is only
    # used as an input, we do not need derived types.
    return [] unless for_output

    derived_scalar_types = schema_def_state.factory.new_scalar_type(name) do |t|
      t.mapping type: "keyword"
      t.json_schema type: "string"
      t.graphql_only graphql_only?
    end.derived_graphql_types

    if (input_enum = as_input).equal?(self)
      derived_scalar_types
    else
      [input_enum] + derived_scalar_types
    end
  end

  # @return [Indexing::FieldType::Enum] indexing representation of this enum type
  def to_indexing_field_type
    Indexing::FieldType::Enum.new(values_by_name.keys)
  end

  # @return [false] enum types are never directly indexed
  def indexed?
    false
  end

  # @return [EnumType] converts the enum type to its input form for when different naming is used for input vs output enums.
  def as_input
    input_name = type_ref
      .as_input_enum # To apply the configured format for input enums.
      .to_final_form # To handle a type name override of the input enum.
      .name

    return self if input_name == name

    schema_def_state.factory.new_enum_type(input_name) do |t|
      t.for_output = false # flag that it's not used as an output enum, and therefore `derived_graphql_types` will be empty on it.
      t.graphql_only true # input enums are always GraphQL-only.
      t.documentation doc_comment
      directives.each { |dir| dir.duplicate_on(t) }
      values_by_name.each { |_, val| val.duplicate_on(t) }
    end
  end
end

#schema_def_state ⇒ State (readonly)

Returns state of the schema.

Returns:

  • (State) —

    state of the schema



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# File 'elasticgraph-schema_definition/lib/elastic_graph/schema_definition/schema_elements/enum_type.rb', line 39

class EnumType < Struct.new(:schema_def_state, :type_ref, :for_output, :values_by_name)
  # @dynamic type_ref, graphql_only?
  prepend Mixins::VerifiesGraphQLName
  include Mixins::CanBeGraphQLOnly
  include Mixins::HasDocumentation
  include Mixins::HasDirectives
  include Mixins::HasDerivedGraphQLTypeCustomizations
  include Mixins::HasReadableToSAndInspect.new { |e| e.name }

  # @private
  def initialize(schema_def_state, name)
    # @type var values_by_name: ::Hash[::String, EnumValue]
    values_by_name = {}
    super(schema_def_state, schema_def_state.type_ref(name).to_final_form, true, values_by_name)

    # :nocov: -- currently all invocations have a block
    yield self if block_given?
    # :nocov:
  end

  # @return [String] name of the enum type
  def name
    type_ref.name
  end

  # @return [TypeReference] reference to `AggregatedValues` type to use for this enum.
  def aggregated_values_type
    schema_def_state.type_ref("NonNumeric").as_aggregated_values
  end

  # Defines an enum value for the current enum type.
  #
  # @param value_name [String] name of the enum value
  # @yield [EnumValue] enum value so it can be further customized
  # @return [void]
  #
  # @example Define an enum type with multiple enum values
  #   ElasticGraph.define_schema do |schema|
  #     schema.enum_type "Currency" do |t|
  #       t.value "USD" do |v|
  #         v.documentation "US Dollars."
  #       end
  #
  #       t.value "JPY" do |v|
  #         v.documentation "Japanese Yen."
  #       end
  #     end
  #   end
  def value(value_name, &block)
    alternate_original_name = value_name
    value_name = schema_def_state.enum_value_namer.name_for(name, value_name.to_s)

    if values_by_name.key?(value_name)
      raise Errors::SchemaError, "Duplicate value on Enum::Type #{name}: #{value_name}"
    end

    if value_name.length > DEFAULT_MAX_KEYWORD_LENGTH
      raise Errors::SchemaError, "Enum value `#{name}.#{value_name}` is too long: it is #{value_name.length} characters but cannot exceed #{DEFAULT_MAX_KEYWORD_LENGTH} characters."
    end

    values_by_name[value_name] = schema_def_state.factory.new_enum_value(value_name, alternate_original_name, &block)
  end

  # Defines multiple enum values. In contrast to {#value}, the enum values cannot be customized
  # further via a block.
  #
  # @param value_names [Array<String>] names of the enum values
  # @return [void]
  #
  # @example Define an enum type with multiple enum values
  #   ElasticGraph.define_schema do |schema|
  #     schema.enum_type "Currency" do |t|
  #       t.values "USD", "JPY", "CAD", "GBP"
  #     end
  #   end
  def values(*value_names)
    value_names.flatten.each { |name| value(name) }
  end

  # @return [SchemaArtifacts::RuntimeMetadata::Enum::Type] runtime metadata for this enum type
  def runtime_metadata
    runtime_metadata_values_by_name = values_by_name
      .transform_values(&:runtime_metadata)
      .compact

    SchemaArtifacts::RuntimeMetadata::Enum::Type.new(values_by_name: runtime_metadata_values_by_name)
  end

  # @return [String] GraphQL SDL form of the enum type
  def to_sdl
    if values_by_name.empty?
      raise Errors::SchemaError, "Enum type #{name} has no values, but enums must have at least one value."
    end

    <<~EOS
      #{formatted_documentation}enum #{name} #{directives_sdl(suffix_with: " ")}{
        #{values_by_name.values.map(&:to_sdl).flat_map { |s| s.split("\n") }.join("\n  ")}
      }
    EOS
  end

  # @private
  def derived_graphql_types
    # Derived GraphQL types must be generated for an output enum. For an enum type that is only
    # used as an input, we do not need derived types.
    return [] unless for_output

    derived_scalar_types = schema_def_state.factory.new_scalar_type(name) do |t|
      t.mapping type: "keyword"
      t.json_schema type: "string"
      t.graphql_only graphql_only?
    end.derived_graphql_types

    if (input_enum = as_input).equal?(self)
      derived_scalar_types
    else
      [input_enum] + derived_scalar_types
    end
  end

  # @return [Indexing::FieldType::Enum] indexing representation of this enum type
  def to_indexing_field_type
    Indexing::FieldType::Enum.new(values_by_name.keys)
  end

  # @return [false] enum types are never directly indexed
  def indexed?
    false
  end

  # @return [EnumType] converts the enum type to its input form for when different naming is used for input vs output enums.
  def as_input
    input_name = type_ref
      .as_input_enum # To apply the configured format for input enums.
      .to_final_form # To handle a type name override of the input enum.
      .name

    return self if input_name == name

    schema_def_state.factory.new_enum_type(input_name) do |t|
      t.for_output = false # flag that it's not used as an output enum, and therefore `derived_graphql_types` will be empty on it.
      t.graphql_only true # input enums are always GraphQL-only.
      t.documentation doc_comment
      directives.each { |dir| dir.duplicate_on(t) }
      values_by_name.each { |_, val| val.duplicate_on(t) }
    end
  end
end

#values_by_name ⇒ Hash<String, EnumValue> (readonly)

Returns map of enum values, keyed by name.

Returns:

  • (Hash<String, EnumValue>) —

    map of enum values, keyed by name



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# File 'elasticgraph-schema_definition/lib/elastic_graph/schema_definition/schema_elements/enum_type.rb', line 39

class EnumType < Struct.new(:schema_def_state, :type_ref, :for_output, :values_by_name)
  # @dynamic type_ref, graphql_only?
  prepend Mixins::VerifiesGraphQLName
  include Mixins::CanBeGraphQLOnly
  include Mixins::HasDocumentation
  include Mixins::HasDirectives
  include Mixins::HasDerivedGraphQLTypeCustomizations
  include Mixins::HasReadableToSAndInspect.new { |e| e.name }

  # @private
  def initialize(schema_def_state, name)
    # @type var values_by_name: ::Hash[::String, EnumValue]
    values_by_name = {}
    super(schema_def_state, schema_def_state.type_ref(name).to_final_form, true, values_by_name)

    # :nocov: -- currently all invocations have a block
    yield self if block_given?
    # :nocov:
  end

  # @return [String] name of the enum type
  def name
    type_ref.name
  end

  # @return [TypeReference] reference to `AggregatedValues` type to use for this enum.
  def aggregated_values_type
    schema_def_state.type_ref("NonNumeric").as_aggregated_values
  end

  # Defines an enum value for the current enum type.
  #
  # @param value_name [String] name of the enum value
  # @yield [EnumValue] enum value so it can be further customized
  # @return [void]
  #
  # @example Define an enum type with multiple enum values
  #   ElasticGraph.define_schema do |schema|
  #     schema.enum_type "Currency" do |t|
  #       t.value "USD" do |v|
  #         v.documentation "US Dollars."
  #       end
  #
  #       t.value "JPY" do |v|
  #         v.documentation "Japanese Yen."
  #       end
  #     end
  #   end
  def value(value_name, &block)
    alternate_original_name = value_name
    value_name = schema_def_state.enum_value_namer.name_for(name, value_name.to_s)

    if values_by_name.key?(value_name)
      raise Errors::SchemaError, "Duplicate value on Enum::Type #{name}: #{value_name}"
    end

    if value_name.length > DEFAULT_MAX_KEYWORD_LENGTH
      raise Errors::SchemaError, "Enum value `#{name}.#{value_name}` is too long: it is #{value_name.length} characters but cannot exceed #{DEFAULT_MAX_KEYWORD_LENGTH} characters."
    end

    values_by_name[value_name] = schema_def_state.factory.new_enum_value(value_name, alternate_original_name, &block)
  end

  # Defines multiple enum values. In contrast to {#value}, the enum values cannot be customized
  # further via a block.
  #
  # @param value_names [Array<String>] names of the enum values
  # @return [void]
  #
  # @example Define an enum type with multiple enum values
  #   ElasticGraph.define_schema do |schema|
  #     schema.enum_type "Currency" do |t|
  #       t.values "USD", "JPY", "CAD", "GBP"
  #     end
  #   end
  def values(*value_names)
    value_names.flatten.each { |name| value(name) }
  end

  # @return [SchemaArtifacts::RuntimeMetadata::Enum::Type] runtime metadata for this enum type
  def runtime_metadata
    runtime_metadata_values_by_name = values_by_name
      .transform_values(&:runtime_metadata)
      .compact

    SchemaArtifacts::RuntimeMetadata::Enum::Type.new(values_by_name: runtime_metadata_values_by_name)
  end

  # @return [String] GraphQL SDL form of the enum type
  def to_sdl
    if values_by_name.empty?
      raise Errors::SchemaError, "Enum type #{name} has no values, but enums must have at least one value."
    end

    <<~EOS
      #{formatted_documentation}enum #{name} #{directives_sdl(suffix_with: " ")}{
        #{values_by_name.values.map(&:to_sdl).flat_map { |s| s.split("\n") }.join("\n  ")}
      }
    EOS
  end

  # @private
  def derived_graphql_types
    # Derived GraphQL types must be generated for an output enum. For an enum type that is only
    # used as an input, we do not need derived types.
    return [] unless for_output

    derived_scalar_types = schema_def_state.factory.new_scalar_type(name) do |t|
      t.mapping type: "keyword"
      t.json_schema type: "string"
      t.graphql_only graphql_only?
    end.derived_graphql_types

    if (input_enum = as_input).equal?(self)
      derived_scalar_types
    else
      [input_enum] + derived_scalar_types
    end
  end

  # @return [Indexing::FieldType::Enum] indexing representation of this enum type
  def to_indexing_field_type
    Indexing::FieldType::Enum.new(values_by_name.keys)
  end

  # @return [false] enum types are never directly indexed
  def indexed?
    false
  end

  # @return [EnumType] converts the enum type to its input form for when different naming is used for input vs output enums.
  def as_input
    input_name = type_ref
      .as_input_enum # To apply the configured format for input enums.
      .to_final_form # To handle a type name override of the input enum.
      .name

    return self if input_name == name

    schema_def_state.factory.new_enum_type(input_name) do |t|
      t.for_output = false # flag that it's not used as an output enum, and therefore `derived_graphql_types` will be empty on it.
      t.graphql_only true # input enums are always GraphQL-only.
      t.documentation doc_comment
      directives.each { |dir| dir.duplicate_on(t) }
      values_by_name.each { |_, val| val.duplicate_on(t) }
    end
  end
end

Instance Method Details

#aggregated_values_type ⇒ TypeReference

Returns reference to AggregatedValues type to use for this enum.

Returns:

  • (TypeReference) —

    reference to AggregatedValues type to use for this enum.



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# File 'elasticgraph-schema_definition/lib/elastic_graph/schema_definition/schema_elements/enum_type.rb', line 65

def aggregated_values_type
  schema_def_state.type_ref("NonNumeric").as_aggregated_values
end

#as_input ⇒ EnumType

Returns converts the enum type to its input form for when different naming is used for input vs output enums.

Returns:

  • (EnumType) —

    converts the enum type to its input form for when different naming is used for input vs output enums.



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# File 'elasticgraph-schema_definition/lib/elastic_graph/schema_definition/schema_elements/enum_type.rb', line 170

def as_input
  input_name = type_ref
    .as_input_enum # To apply the configured format for input enums.
    .to_final_form # To handle a type name override of the input enum.
    .name

  return self if input_name == name

  schema_def_state.factory.new_enum_type(input_name) do |t|
    t.for_output = false # flag that it's not used as an output enum, and therefore `derived_graphql_types` will be empty on it.
    t.graphql_only true # input enums are always GraphQL-only.
    t.documentation doc_comment
    directives.each { |dir| dir.duplicate_on(t) }
    values_by_name.each { |_, val| val.duplicate_on(t) }
  end
end

#indexed? ⇒ false

Returns enum types are never directly indexed.

Returns:

  • (false) —

    enum types are never directly indexed



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# File 'elasticgraph-schema_definition/lib/elastic_graph/schema_definition/schema_elements/enum_type.rb', line 165

def indexed?
  false
end

#name ⇒ String

Returns name of the enum type.

Returns:

  • (String) —

    name of the enum type



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# File 'elasticgraph-schema_definition/lib/elastic_graph/schema_definition/schema_elements/enum_type.rb', line 60

def name
  type_ref.name
end

#runtime_metadata ⇒ SchemaArtifacts::RuntimeMetadata::Enum::Type

Returns runtime metadata for this enum type.

Returns:

  • (SchemaArtifacts::RuntimeMetadata::Enum::Type) —

    runtime metadata for this enum type



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# File 'elasticgraph-schema_definition/lib/elastic_graph/schema_definition/schema_elements/enum_type.rb', line 119

def runtime_metadata
  runtime_metadata_values_by_name = values_by_name
    .transform_values(&:runtime_metadata)
    .compact

  SchemaArtifacts::RuntimeMetadata::Enum::Type.new(values_by_name: runtime_metadata_values_by_name)
end

#to_indexing_field_type ⇒ Indexing::FieldType::Enum

Returns indexing representation of this enum type.

Returns:



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# File 'elasticgraph-schema_definition/lib/elastic_graph/schema_definition/schema_elements/enum_type.rb', line 160

def to_indexing_field_type
  Indexing::FieldType::Enum.new(values_by_name.keys)
end

#to_sdl ⇒ String

Returns GraphQL SDL form of the enum type.

Returns:

  • (String) —

    GraphQL SDL form of the enum type



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# File 'elasticgraph-schema_definition/lib/elastic_graph/schema_definition/schema_elements/enum_type.rb', line 128

def to_sdl
  if values_by_name.empty?
    raise Errors::SchemaError, "Enum type #{name} has no values, but enums must have at least one value."
  end

  <<~EOS
    #{formatted_documentation}enum #{name} #{directives_sdl(suffix_with: " ")}{
      #{values_by_name.values.map(&:to_sdl).flat_map { |s| s.split("\n") }.join("\n  ")}
    }
  EOS
end

#value(value_name) {|EnumValue| ... } ⇒ void

This method returns an undefined value.

Defines an enum value for the current enum type.

Examples:

Define an enum type with multiple enum values

ElasticGraph.define_schema do |schema|
  schema.enum_type "Currency" do |t|
    t.value "USD" do |v|
      v.documentation "US Dollars."
    end

    t.value "JPY" do |v|
      v.documentation "Japanese Yen."
    end
  end
end

Parameters:

  • value_name (String) —

    name of the enum value

Yields:

  • (EnumValue) —

    enum value so it can be further customized



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# File 'elasticgraph-schema_definition/lib/elastic_graph/schema_definition/schema_elements/enum_type.rb', line 87

def value(value_name, &block)
  alternate_original_name = value_name
  value_name = schema_def_state.enum_value_namer.name_for(name, value_name.to_s)

  if values_by_name.key?(value_name)
    raise Errors::SchemaError, "Duplicate value on Enum::Type #{name}: #{value_name}"
  end

  if value_name.length > DEFAULT_MAX_KEYWORD_LENGTH
    raise Errors::SchemaError, "Enum value `#{name}.#{value_name}` is too long: it is #{value_name.length} characters but cannot exceed #{DEFAULT_MAX_KEYWORD_LENGTH} characters."
  end

  values_by_name[value_name] = schema_def_state.factory.new_enum_value(value_name, alternate_original_name, &block)
end

#values(*value_names) ⇒ void

This method returns an undefined value.

Defines multiple enum values. In contrast to #value, the enum values cannot be customized further via a block.

Examples:

Define an enum type with multiple enum values

ElasticGraph.define_schema do |schema|
  schema.enum_type "Currency" do |t|
    t.values "USD", "JPY", "CAD", "GBP"
  end
end

Parameters:

  • value_names (Array<String>) —

    names of the enum values



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# File 'elasticgraph-schema_definition/lib/elastic_graph/schema_definition/schema_elements/enum_type.rb', line 114

def values(*value_names)
  value_names.flatten.each { |name| value(name) }
end