Module: GraphQL::Language::OperationSlice

Defined in:
lib/graphql/language/operation_slice.rb

Class Method Summary collapse

Class Method Details

.find_definition_fragment_spreads(document, definition_name) ⇒ Object 



29
30
31
32
33
34
35
36
37
38
39
 
# File 'lib/graphql/language/operation_slice.rb', line 29

def self.find_definition_fragment_spreads(document, definition_name)
  definition = document.definitions.find { |node| node.name == definition_name }
  raise "missing definition: #{definition_name}" unless definition
  spreads = Set.new
  visitor = Visitor.new(definition)
  visitor[Nodes::FragmentSpread].enter << -> (node, _parent) do
    spreads << node.name
  end
  visitor.visit
  spreads
end

.slice(document, operation_name) ⇒ Object

Public: Return’s minimal document to represent operation.

Find’s target operation and any fragment dependencies and returns a new document with just those definitions.

document - The Nodes::Document to find definitions. operation_name - The String name of Nodes::OperationDefinition

Returns new Nodes::Document.



15
16
17
18
19
20
21
22
23
24
25
26
27
 
# File 'lib/graphql/language/operation_slice.rb', line 15

def self.slice(document, operation_name)
  seen = Set.new([operation_name])
  stack = [operation_name]

  until stack.empty?
    name = stack.pop
    names = find_definition_fragment_spreads(document, name)
    seen.merge(names)
    stack.concat(names.to_a)
  end

  Nodes::Document.new(definitions: document.definitions.select { |node| seen.include?(node.name) })
end