Class: GraphQL::Client

Inherits:
Object
  • Object
show all
Defined in:
lib/graphql/client.rb,
lib/graphql/client/query_result.rb

Defined Under Namespace

Classes: Definition, Error, FragmentDefinition, OperationDefinition, QueryResult, ValidationError

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(schema:) ⇒ Client

Returns a new instance of Client.



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# File 'lib/graphql/client.rb', line 16

def initialize(schema:)
  @schema = schema
  @definitions = []
  @document = GraphQL::Language::Nodes::Document.new(definitions: @definitions)
  @document_slices = {}
end

Instance Attribute Details

#schema ⇒ Object (readonly)

Returns the value of attribute schema.



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# File 'lib/graphql/client.rb', line 14

def schema
  @schema
end

Instance Method Details

#document ⇒ Object 



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# File 'lib/graphql/client.rb', line 119

def document
  @document
end

#document_slice(operation_name) ⇒ Object 



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# File 'lib/graphql/client.rb', line 123

def document_slice(operation_name)
  @document_slices[operation_name] ||= Language::OperationSlice.slice(document, operation_name).deep_freeze
end

#parse(str) ⇒ Object 



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# File 'lib/graphql/client.rb', line 70

def parse(str)
  str = str.gsub(/\.\.\.([a-zA-Z0-9_]+(::[a-zA-Z0-9_]+)+)/) { |m|
    const_name = $1
    case fragment = ActiveSupport::Inflector.safe_constantize(const_name)
    when FragmentDefinition
      "...#{fragment.definition_name}"
    when nil
      raise NameError, "uninitialized constant #{const_name}\n#{str}"
    else
      raise TypeError, "expected #{const_name} to be a #{FragmentDefinition}, but was a #{fragment.class}"
    end
  }

  doc = GraphQL::Relay::Parser.parse(str)

  mutator = GraphQL::Language::Mutator.new(doc)

  # TODO: Make this __typename injection optional
  mutator.prepend_selection(GraphQL::Language::Nodes::Field.new(name: "__typename").deep_freeze)

  definitions, renames = {}, {}
  doc.definitions.each do |node|
    local_name = node.name
    definition = case node
    when Language::Nodes::OperationDefinition
      OperationDefinition.new(node: node)
    when Language::Nodes::FragmentDefinition
      FragmentDefinition.new(node: node)
    end
    definitions[local_name] = definition
    renames[local_name] = -> { definition.definition_name }
  end
  mutator.rename_definitions(renames)

  doc.deep_freeze

  self.document.definitions.concat(doc.definitions)

  if definitions[nil]
    definitions[nil]
  else
    Module.new do
      definitions.each do |name, definition|
        const_set(name, definition)
      end
    end
  end
end

#validate! ⇒ Object 



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# File 'lib/graphql/client.rb', line 127

def validate!
  validator = StaticValidation::Validator.new(schema: @schema)
  query = Query.new(@schema, document: document)

  validator.validate(query).fetch(:errors).each do |error|
    raise ValidationError, error["message"]
  end

  nil
end