Method: GraphQL::Execution::Lookahead#alias_selection

Defined in:
lib/graphql/execution/lookahead.rb

#alias_selection(alias_name, selected_type: @selected_type, arguments: nil) ⇒ GraphQL::Execution::Lookahead

Like #selection, but for aliases. It returns a null object (check with #selected?)

Returns:



147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
 
# File 'lib/graphql/execution/lookahead.rb', line 147

def alias_selection(alias_name, selected_type: @selected_type, arguments: nil)
  alias_cache_key = [alias_name, arguments]
  return alias_selections[key] if alias_selections.key?(alias_name)

  alias_node = lookup_alias_node(ast_nodes, alias_name)
  return NULL_LOOKAHEAD unless alias_node

  next_field_defn = @query.types.field(selected_type, alias_node.name)

  alias_arguments = @query.arguments_for(alias_node, next_field_defn)
  if alias_arguments.is_a?(::GraphQL::Execution::Interpreter::Arguments)
    alias_arguments = alias_arguments.keyword_arguments
  end

  return NULL_LOOKAHEAD if arguments && arguments != alias_arguments

  alias_selections[alias_cache_key] = lookahead_for_selection(next_field_defn, selected_type, alias_arguments, alias_name)
end