Module: GraphQL::Schema::Member::BuildType Private

Defined in:
lib/graphql/schema/member/build_type.rb

This module is part of a private API. You should avoid using this module if possible, as it may be removed or be changed in the future.

Constant Summary collapse

LIST_TYPE_ERROR =

This constant is part of a private API. You should avoid using this constant if possible, as it may be removed or be changed in the future.

"Use an array of [T] or [T, null: true] for list types; other arrays are not supported"

Class Method Summary collapse

Class Method Details

.camelize(string) ⇒ Object

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future.


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# File 'lib/graphql/schema/member/build_type.rb', line 122

def camelize(string)
  return string unless string.include?("_")
  camelized = string.split('_').map(&:capitalize).join
  camelized[0] = camelized[0].downcase
  if (match_data = string.match(/\A(_+)/))
    camelized = "#{match_data[0]}#{camelized}"
  end
  camelized
end

.constantize(string) ⇒ Object

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future.

Resolves constant from string (based on Rails ActiveSupport::Inflector.constantize)


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# File 'lib/graphql/schema/member/build_type.rb', line 133

def constantize(string)
  names = string.split('::')

  # Trigger a built-in NameError exception including the ill-formed constant in the message.
  Object.const_get(string) if names.empty?

  # Remove the first blank element in case of '::ClassName' notation.
  names.shift if names.size > 1 && names.first.empty?

  names.inject(Object) do |constant, name|
    if constant == Object
      constant.const_get(name)
    else
      candidate = constant.const_get(name)
      next candidate if constant.const_defined?(name, false)
      next candidate unless Object.const_defined?(name)

      # Go down the ancestors to check if it is owned directly. The check
      # stops when we reach Object or the end of ancestors tree.
      constant = constant.ancestors.inject do |const, ancestor|
        break const    if ancestor == Object
        break ancestor if ancestor.const_defined?(name, false)
        const
      end

      # Owner is in Object, so raise.
      constant.const_get(name, false)
    end
  end
end

.parse_type(type_expr, null:) ⇒ GraphQL::BaseType

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future.

Parameters:

Returns:


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# File 'lib/graphql/schema/member/build_type.rb', line 12

def parse_type(type_expr, null:)
  list_type = false

  return_type = case type_expr
  when String
    case type_expr
    when "String"
      GraphQL::Types::String
    when "Int", "Integer"
      GraphQL::Types::Int
    when "Float"
      GraphQL::Types::Float
    when "Boolean"
      GraphQL::Types::Boolean
    when "ID"
      GraphQL::Types::ID
    when /\A\[.*\]\Z/
      list_type = true
      # List members are required by default
      parse_type(type_expr[1..-2], null: false)
    when /.*!\Z/
      null = false
      parse_type(type_expr[0..-2], null: true)
    else
      maybe_type = constantize(type_expr)
      case maybe_type
      when GraphQL::BaseType
        maybe_type
      when Module
        # This is a way to check that it's the right kind of module:
        if maybe_type.respond_to?(:graphql_definition)
          maybe_type
        else
          raise ArgumentError, "Unexpected class/module found for GraphQL type: #{type_expr} (must be type definition class/module)"
        end
      end
    end
  when GraphQL::BaseType, GraphQL::Schema::LateBoundType
    type_expr
  when Array
    case type_expr.length
    when 1
      list_type = true
      # List members are required by default
      parse_type(type_expr.first, null: false)
    when 2
      inner_type, nullable_option = type_expr
      if nullable_option.keys != [:null] || nullable_option.values != [true]
        raise ArgumentError, LIST_TYPE_ERROR
      end
      list_type = true
      parse_type(inner_type, null: true)
    else
      raise ArgumentError, LIST_TYPE_ERROR
    end
  when GraphQL::Schema::NonNull, GraphQL::Schema::List
    type_expr
  when Module
    # This is a way to check that it's the right kind of module:
    if type_expr.respond_to?(:graphql_definition)
      type_expr
    else
      # Eg `String` => GraphQL::STRING_TYPE
      parse_type(type_expr.name, null: true)
    end
  when Proc
    parse_type(type_expr.call, null: true)
  when false
    raise ArgumentError, "Received `false` instead of a type, maybe a `!` should be replaced with `null: true` (for fields) or `required: true` (for arguments)"
  end

  if return_type.nil?
    raise "Unexpected type input: #{type_expr.inspect} (#{type_expr.class})"
  end

  # Apply list_type first, that way the
  # .to_non_null_type applies to the list type, not the inner type
  if list_type
    return_type = return_type.to_list_type
  end

  if !null
    return_type = return_type.to_non_null_type
  end


  return_type
end

.to_type_name(something) ⇒ Object

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future.


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# File 'lib/graphql/schema/member/build_type.rb', line 101

def to_type_name(something)
  case something
  when GraphQL::BaseType, GraphQL::Schema::LateBoundType
    something.unwrap.name
  when Array
    to_type_name(something.first)
  when Module
    if something.respond_to?(:graphql_name)
      something.graphql_name
    else
      to_type_name(something.name)
    end
  when String
    something.gsub(/\]\[\!/, "").split("::").last
  when GraphQL::Schema::NonNull, GraphQL::Schema::List
    to_type_name(something.unwrap)
  else
    raise "Unhandled to_type_name input: #{something} (#{something.class})"
  end
end

.underscore(string) ⇒ Object

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future.


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# File 'lib/graphql/schema/member/build_type.rb', line 164

def underscore(string)
  string
    .gsub(/([A-Z]+)([A-Z][a-z])/,'\1_\2') # URLDecoder -> URL_Decoder
    .gsub(/([a-z\d])([A-Z])/,'\1_\2')     # someThing -> some_Thing
    .downcase
end