Module: GraphQL::Execution::Execute::ExecutionFunctions Private

Included in:
GraphQL::Execution::Execute
Defined in:
lib/graphql/execution/execute.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.

Class Method Summary collapse

Class Method Details

.continue_or_wait(raw_value, field_type, field_ctx) ⇒ 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.

If the returned object is lazy (unfinished), assign the lazy object to .value= so we can resolve it later. When we resolve it later, reassign it to .value= so that the finished value replaces the unfinished one.

If the returned object is finished, continue to coerce and resolve child fields



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# File 'lib/graphql/execution/execute.rb', line 144

def continue_or_wait(raw_value, field_type, field_ctx)
  if field_ctx.schema.lazy?(raw_value)
    field_ctx.value = Execution::Lazy.new {
      inner_value = begin
          begin
            field_ctx.schema.sync_lazy(raw_value)
          rescue GraphQL::UnauthorizedError => err
            field_ctx.schema.unauthorized_object(err)
          end
        rescue GraphQL::ExecutionError => err
          err
        end

      field_ctx.value = continue_or_wait(inner_value, field_type, field_ctx)
    }
  else
    field_ctx.value = continue_resolve_field(raw_value, field_type, field_ctx)
  end
end

.continue_resolve_field(raw_value, field_type, field_ctx) ⇒ 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/execution/execute.rb', line 164

def continue_resolve_field(raw_value, field_type, field_ctx)
  if field_ctx.parent.invalid_null?
    return nil
  end
  query = field_ctx.query

  case raw_value
  when GraphQL::ExecutionError
    raw_value.ast_node ||= field_ctx.ast_node
    raw_value.path = field_ctx.path
    query.context.errors.push(raw_value)
  when Array
    if !field_type.list?
      # List type errors are handled above, this is for the case of fields returning an array of errors
      list_errors = raw_value.each_with_index.select { |value, _| value.is_a?(GraphQL::ExecutionError) }
      if list_errors.any?
        list_errors.each do |error, index|
          error.ast_node = field_ctx.ast_node
          error.path = field_ctx.path + [index]
          query.context.errors.push(error)
        end
      end
    end
  end

  resolve_value(
    raw_value,
    field_type,
    field_ctx,
  )
end

.lazy_resolve_root_selection(result, query: nil, multiplex: nil) ⇒ 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/execution/execute.rb', line 45

def lazy_resolve_root_selection(result, query: nil, multiplex: nil)
  if query.nil? && multiplex.queries.length == 1
    query = multiplex.queries[0]
  end

  tracer = (query || multiplex)
  tracer.trace("execute_query_lazy", {multiplex: multiplex, query: query}) do
    GraphQL::Execution::Lazy.resolve(result)
  end
end

.resolve_field(object, field_ctx) ⇒ 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/execution/execute.rb', line 98

def resolve_field(object, field_ctx)
  query = field_ctx.query
  irep_node = field_ctx.irep_node
  parent_type = irep_node.owner_type
  field = field_ctx.field

  raw_value = begin
    begin
      arguments = query.arguments_for(irep_node, field)
      field_ctx.trace("execute_field", { context: field_ctx }) do
        field_ctx.schema.middleware.invoke([parent_type, object, field, arguments, field_ctx])
      end
    rescue GraphQL::UnauthorizedError => err
      field_ctx.schema.unauthorized_object(err)
    end
  rescue GraphQL::ExecutionError => err
    err
  end

  if field_ctx.schema.lazy?(raw_value)
    field_ctx.value = Execution::Lazy.new {
      inner_value = field_ctx.trace("execute_field_lazy", {context: field_ctx}) {
        begin
          begin
            field_ctx.field.lazy_resolve(raw_value, arguments, field_ctx)
          rescue GraphQL::UnauthorizedError => err
            field_ctx.schema.unauthorized_object(err)
          end
        rescue GraphQL::ExecutionError => err
          err
        end
      }
      continue_or_wait(inner_value, field_ctx.type, field_ctx)
    }
  else
    continue_or_wait(raw_value, field_ctx.type, field_ctx)
  end
end

.resolve_root_selection(query) ⇒ 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/execution/execute.rb', line 31

def resolve_root_selection(query)
  query.trace("execute_query", query: query) do
    operation = query.selected_operation
    op_type = operation.operation_type
    root_type = query.root_type_for_operation(op_type)
    resolve_selection(
      query.root_value,
      root_type,
      query.context,
      mutation: query.mutation?
    )
  end
end

.resolve_selection(object, current_type, current_ctx, mutation: false) ⇒ 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/execution/execute.rb', line 56

def resolve_selection(object, current_type, current_ctx, mutation: false )
  # Assign this _before_ resolving the children
  # so that when a child propagates null, the selection result is
  # ready for it.
  current_ctx.value = {}

  selections_on_type = current_ctx.irep_node.typed_children[current_type]

  selections_on_type.each do |name, child_irep_node|
    field_ctx = current_ctx.spawn_child(
      key: name,
      object: object,
      irep_node: child_irep_node,
    )

    field_result = resolve_field(
      object,
      field_ctx
    )

    if field_result.is_a?(Skip)
      next
    end

    if mutation
      GraphQL::Execution::Lazy.resolve(field_ctx)
    end


    # If the last subselection caused a null to propagate to _this_ selection,
    # then we may as well quit executing fields because they
    # won't be in the response
    if current_ctx.invalid_null?
      break
    else
      current_ctx.value[name] = field_ctx
    end
  end

  current_ctx.value
end

.resolve_value(value, field_type, field_ctx) ⇒ 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/execution/execute.rb', line 196

def resolve_value(value, field_type, field_ctx)
  field_defn = field_ctx.field

  if value.nil?
    if field_type.kind.non_null?
      parent_type = field_ctx.irep_node.owner_type
      type_error = GraphQL::InvalidNullError.new(parent_type, field_defn, value)
      field_ctx.schema.type_error(type_error, field_ctx)
      PROPAGATE_NULL
    else
      nil
    end
  elsif value.is_a?(GraphQL::ExecutionError)
    if field_type.kind.non_null?
      PROPAGATE_NULL
    else
      nil
    end
  elsif value.is_a?(Array) && value.any? && value.all? {|v| v.is_a?(GraphQL::ExecutionError)}
    if field_type.kind.non_null?
      PROPAGATE_NULL
    else
      nil
    end
  elsif value.is_a?(Skip)
    field_ctx.value = value
  else
    case field_type.kind
    when GraphQL::TypeKinds::SCALAR, GraphQL::TypeKinds::ENUM
      field_type.coerce_result(value, field_ctx)
    when GraphQL::TypeKinds::LIST
      inner_type = field_type.of_type
      i = 0
      result = []
      field_ctx.value = result

      value.each do |inner_value|
        inner_ctx = field_ctx.spawn_child(
          key: i,
          object: inner_value,
          irep_node: field_ctx.irep_node,
        )

        inner_result = continue_or_wait(
          inner_value,
          inner_type,
          inner_ctx,
        )

        return PROPAGATE_NULL if inner_result == PROPAGATE_NULL

        result << inner_ctx
        i += 1
      end

      result
    when GraphQL::TypeKinds::NON_NULL
      inner_type = field_type.of_type
      resolve_value(
        value,
        inner_type,
        field_ctx,
      )
    when GraphQL::TypeKinds::OBJECT
      resolve_selection(
        value,
        field_type,
        field_ctx
      )
    when GraphQL::TypeKinds::UNION, GraphQL::TypeKinds::INTERFACE
      query = field_ctx.query
      resolved_type = field_type.resolve_type(value, field_ctx)
      possible_types = query.possible_types(field_type)

      if !possible_types.include?(resolved_type)
        parent_type = field_ctx.irep_node.owner_type
        type_error = GraphQL::UnresolvedTypeError.new(value, field_defn, parent_type, resolved_type, possible_types)
        field_ctx.schema.type_error(type_error, field_ctx)
        PROPAGATE_NULL
      else
        resolve_value(
          value,
          resolved_type,
          field_ctx,
        )
      end
    else
      raise("Unknown type kind: #{field_type.kind}")
    end
  end
end