Method: GraphQL::Execution::Lookahead#selections

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

#selections(arguments: nil) ⇒ Array<GraphQL::Execution::Lookahead>

Like #selection, but for all nodes. It returns a list of Lookaheads for all Selections

If arguments: is provided, each provided key/value will be matched against the arguments in each selection. This method will filter the selections if any of the given arguments: do not match the given selection.

Examples:

getting the name of a selection

def articles(lookahead:)
  next_lookaheads = lookahead.selections # => [#<GraphQL::Execution::Lookahead ...>, ...]
  next_lookaheads.map(&:name) #=> [:full_content, :title]
end

Parameters:

  • arguments (Hash) (defaults to: nil) —

    Arguments which must match in the selection

Returns:



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# File 'lib/graphql/execution/lookahead.rb', line 181

def selections(arguments: nil)
  subselections_by_type = {}
  subselections_on_type = subselections_by_type[@selected_type] = {}

  @ast_nodes.each do |node|
    find_selections(subselections_by_type, subselections_on_type, @selected_type, node.selections, arguments)
  end

  subselections = []

  subselections_by_type.each do |type, ast_nodes_by_response_key|
    ast_nodes_by_response_key.each do |response_key, ast_nodes|
      field_defn = @query.types.field(type, ast_nodes.first.name)
      lookahead = Lookahead.new(query: @query, ast_nodes: ast_nodes, field: field_defn, owner_type: type)
      subselections.push(lookahead)
    end
  end

  subselections
end