Class: GraphQL::Execution::Batching::Runner

Inherits:
Object
  • Object
show all
Defined in:
lib/graphql/execution/batching/runner.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(multiplex) ⇒ Runner

Returns a new instance of Runner.



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# File 'lib/graphql/execution/batching/runner.rb', line 6

def initialize(multiplex)
  @multiplex = multiplex
  @schema = multiplex.schema
  @steps_queue = []
  @runtime_types_at_result = {}.compare_by_identity
  @static_types_at_result = {}.compare_by_identity
  @selected_operation = nil
  @dataloader = multiplex.context[:dataloader] ||= @schema.dataloader_class.new
  @resolves_lazies = @schema.resolves_lazies?
  @field_resolve_step_class = @schema.uses_raw_value? ? RawValueFieldResolveStep : FieldResolveStep
  @authorizes = {}.compare_by_identity
end

Instance Attribute Details

#authorizes ⇒ Object (readonly)

Returns the value of attribute authorizes.



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# File 'lib/graphql/execution/batching/runner.rb', line 23

def authorizes
  @authorizes
end

#dataloader ⇒ Object (readonly)

Returns the value of attribute dataloader.



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# File 'lib/graphql/execution/batching/runner.rb', line 23

def dataloader
  @dataloader
end

#resolves_lazies ⇒ Object (readonly)

Returns the value of attribute resolves_lazies.



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# File 'lib/graphql/execution/batching/runner.rb', line 23

def resolves_lazies
  @resolves_lazies
end

#runtime_types_at_result ⇒ Object (readonly)

Returns the value of attribute runtime_types_at_result.



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# File 'lib/graphql/execution/batching/runner.rb', line 23

def runtime_types_at_result
  @runtime_types_at_result
end

#schema ⇒ Object (readonly)

Returns the value of attribute schema.



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# File 'lib/graphql/execution/batching/runner.rb', line 23

def schema
  @schema
end

#static_types_at_result ⇒ Object (readonly)

Returns the value of attribute static_types_at_result.



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# File 'lib/graphql/execution/batching/runner.rb', line 23

def static_types_at_result
  @static_types_at_result
end

#steps_queue ⇒ Object (readonly)

Returns the value of attribute steps_queue.



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# File 'lib/graphql/execution/batching/runner.rb', line 23

def steps_queue
  @steps_queue
end

#variables ⇒ Object (readonly)

Returns the value of attribute variables.



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# File 'lib/graphql/execution/batching/runner.rb', line 23

def variables
  @variables
end

Instance Method Details

#add_step(step) ⇒ Object 



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# File 'lib/graphql/execution/batching/runner.rb', line 19

def add_step(step)
  @dataloader.append_job(step)
end

#execute ⇒ Object 



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# File 'lib/graphql/execution/batching/runner.rb', line 25

def execute
  Fiber[:__graphql_current_multiplex] = @multiplex
  isolated_steps = [[]]
  trace = @multiplex.current_trace
  queries = @multiplex.queries
  multiplex_analyzers = @schema.multiplex_analyzers
  if @multiplex.max_complexity
    multiplex_analyzers += [GraphQL::Analysis::MaxQueryComplexity]
  end

  trace.execute_multiplex(multiplex: @multiplex) do
    trace.begin_analyze_multiplex(@multiplex, multiplex_analyzers)
    @schema.analysis_engine.analyze_multiplex(@multiplex, multiplex_analyzers)
    trace.end_analyze_multiplex(@multiplex, multiplex_analyzers)

    results = []
    queries.each do |query|
      if query.validate && !query.valid?
        results << {
          "errors" => query.static_errors.map(&:to_h)
        }
        next
      end

      selected_operation = query.document.definitions.first # TODO select named operation
      data = {}

      root_type = case selected_operation.operation_type
      when nil, "query"
        @schema.query
      when "mutation"
        @schema.mutation
      when "subscription"
        @schema.subscription
      else
        raise ArgumentError, "Unknown operation type: #{selected_operation.operation_type.inspect}"
      end

      auth_check = schema.sync_lazy(root_type.authorized?(query.root_value, query.context))
      root_value = if auth_check
        query.root_value
      else
        begin
          auth_err = GraphQL::UnauthorizedError.new(object: query.root_value, type: root_type, context: query.context)
          new_val = schema.unauthorized_object(auth_err)
          if new_val
            auth_check = true
          end
          new_val
        rescue GraphQL::ExecutionError => ex_err
          # The old runtime didn't add path and ast_nodes to this
          query.context.add_error(ex_err)
          nil
        end
      end

      if !auth_check
        results << {}
        next
      end

      results << { "data" => data }

      case selected_operation.operation_type
      when nil, "query"
        isolated_steps[0] << SelectionsStep.new(
          parent_type: root_type,
          selections: selected_operation.selections,
          objects: [root_value],
          results: [data],
          path: EmptyObjects::EMPTY_ARRAY,
          runner: self,
          query: query,
        )
      when "mutation"
        fields = {}
        gather_selections(root_type, selected_operation.selections, nil, query, {}, into: fields)
        fields.each_value do |field_resolve_step|
          isolated_steps << [SelectionsStep.new(
            parent_type: root_type,
            selections: field_resolve_step.ast_nodes || Array(field_resolve_step.ast_node),
            objects: [root_value],
            results: [data],
            path: EmptyObjects::EMPTY_ARRAY,
            runner: self,
            query: query,
          )]
        end
      when "subscription"
        raise ArgumentError, "TODO implement subscriptions"
      else
        raise ArgumentError, "Unhandled operation type: #{operation.operation_type.inspect}"
      end

      @static_types_at_result[data] = root_type
      @runtime_types_at_result[data] = root_type

      # TODO This is stupid but makes multiplex_spec.rb pass
      trace.execute_query(query: query) do
      end
    end

    while (next_isolated_steps = isolated_steps.shift)
      next_isolated_steps.each do |step|
        add_step(step)
      end
      @dataloader.run
    end

    # TODO This is stupid but makes multiplex_spec.rb pass
    trace.execute_query_lazy(query: nil, multiplex: @multiplex) do
    end

    queries.each_with_index.map do |query, idx|
      result = results[idx]
      fin_result = if query.context.errors.empty?
        result
      else
        data = result["data"]
        data = propagate_errors(data, query)
        errors = []
        query.context.errors.each do |err|
          if err.respond_to?(:to_h)
            errors << err.to_h
          end
        end
        res_h = {}
        if !errors.empty?
          res_h["errors"] = errors
        end
        res_h["data"] = data
        res_h
      end

      GraphQL::Query::Result.new(query: query, values: fin_result)
    end
  end
ensure
  Fiber[:__graphql_current_multiplex] = nil
end

#gather_selections(type_defn, ast_selections, selections_step, query, prototype_result, into:) ⇒ Object 



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# File 'lib/graphql/execution/batching/runner.rb', line 166

def gather_selections(type_defn, ast_selections, selections_step, query, prototype_result, into:)
  ast_selections.each do |ast_selection|
    next if !directives_include?(query, ast_selection)
    case ast_selection
    when GraphQL::Language::Nodes::Field
      key = ast_selection.alias || ast_selection.name
      step = into[key] ||= begin
        prototype_result[key] = nil

        @field_resolve_step_class.new(
          selections_step: selections_step,
          key: key,
          parent_type: type_defn,
          runner: self,
        )
      end
      step.append_selection(ast_selection)
    when GraphQL::Language::Nodes::InlineFragment
      type_condition = ast_selection.type&.name
      if type_condition.nil? || type_condition_applies?(query.context, type_defn, type_condition)
        gather_selections(type_defn, ast_selection.selections, selections_step, query, prototype_result, into: into)
      end
    when GraphQL::Language::Nodes::FragmentSpread
      fragment_definition = query.document.definitions.find { |defn| defn.is_a?(GraphQL::Language::Nodes::FragmentDefinition) && defn.name == ast_selection.name }
      type_condition = fragment_definition.type.name
      if type_condition_applies?(query.context, type_defn, type_condition)
        gather_selections(type_defn, fragment_definition.selections, selections_step, query, prototype_result, into: into)
      end
    else
      raise ArgumentError, "Unsupported graphql selection node: #{ast_selection.class} (#{ast_selection.inspect})"
    end
  end
end