Class: GraphQL::Query::SerialExecution::SelectionResolution

Inherits:
Object
  • Object
show all
Defined in:
lib/graphql/query/serial_execution/selection_resolution.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(target, type, selections, query, execution_strategy) ⇒ SelectionResolution

Returns a new instance of SelectionResolution.



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# File 'lib/graphql/query/serial_execution/selection_resolution.rb', line 7

def initialize(target, type, selections, query, execution_strategy)
  @target = target
  @type = type
  @selections = selections
  @query = query
  @execution_strategy = execution_strategy
end

Instance Attribute Details

#execution_strategy ⇒ Object (readonly)

Returns the value of attribute execution_strategy.



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# File 'lib/graphql/query/serial_execution/selection_resolution.rb', line 5

def execution_strategy
  @execution_strategy
end

#query ⇒ Object (readonly)

Returns the value of attribute query.



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# File 'lib/graphql/query/serial_execution/selection_resolution.rb', line 5

def query
  @query
end

#selections ⇒ Object (readonly)

Returns the value of attribute selections.



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# File 'lib/graphql/query/serial_execution/selection_resolution.rb', line 5

def selections
  @selections
end

#target ⇒ Object (readonly)

Returns the value of attribute target.



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# File 'lib/graphql/query/serial_execution/selection_resolution.rb', line 5

def target
  @target
end

#type ⇒ Object (readonly)

Returns the value of attribute type.



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# File 'lib/graphql/query/serial_execution/selection_resolution.rb', line 5

def type
  @type
end

Instance Method Details

#result ⇒ Object 



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# File 'lib/graphql/query/serial_execution/selection_resolution.rb', line 15

def result
  # In a first pass, we flatten the selection by merging in fields from
  # any fragments - this prevents us from resolving the same fields
  # more than one time in cases where fragments repeat fields.
  # Then, In a second pass, we resolve the flattened set of fields
  selections
    .reduce({}){|memo, ast_node|
      flattened_selections = flatten_selection(ast_node)
      flattened_selections.each do |name, selection|
        merge_into_result(memo, selection)
      end
      memo
    }
    .values
    .reduce({}){|memo, ast_node|
      memo.merge(resolve_field(ast_node))
    }
end