Class: GraphQL::Schema::NonNull

Inherits:
Wrapper
  • Object
show all
Includes:
Member::ValidatesInput
Defined in:
lib/graphql/schema/non_null.rb

Overview

Represents a non null type in the schema. Wraps a Member when it is required.

See Also:

  • {Schema{Schema::Member{Schema::Member::TypeSystemHelpers{Schema::Member::TypeSystemHelpers#to_non_null_type}

Instance Attribute Summary

Attributes inherited from Wrapper

#of_type

Instance Method Summary collapse

Methods included from Member::ValidatesInput

#coerce_isolated_input, #coerce_isolated_result, #valid_input?, #valid_isolated_input?

Methods inherited from Wrapper

#==, #initialize, #unwrap

Methods included from Member::TypeSystemHelpers

#to_list_type, #to_non_null_type

Constructor Details

This class inherits a constructor from GraphQL::Schema::Wrapper

Instance Method Details

#coerce_input(value, ctx) ⇒ Object 



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# File 'lib/graphql/schema/non_null.rb', line 49

def coerce_input(value, ctx)
  # `.validate_input` above is used for variables, but this method is used for arguments
  if value.nil?
    raise GraphQL::ExecutionError, "`null` is not a valid input for `#{to_type_signature}`, please provide a value for this argument."
  end
  of_type.coerce_input(value, ctx)
end

#coerce_result(value, ctx) ⇒ Object 



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# File 'lib/graphql/schema/non_null.rb', line 57

def coerce_result(value, ctx)
  of_type.coerce_result(value, ctx)
end

#description ⇒ Object

This is for implementing introspection



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# File 'lib/graphql/schema/non_null.rb', line 62

def description
  nil
end

#graphql_name ⇒ Object

This is for introspection, where it’s expected the name will be null



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# File 'lib/graphql/schema/non_null.rb', line 45

def graphql_name
  nil
end

#inspect ⇒ Object 



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# File 'lib/graphql/schema/non_null.rb', line 30

def inspect
  "#<#{self.class.name} @of_type=#{@of_type.inspect}>"
end

#kind ⇒ GraphQL::TypeKinds::NON_NULL

Returns:

  • (GraphQL::TypeKinds::NON_NULL) 


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# File 'lib/graphql/schema/non_null.rb', line 12

def kind
  GraphQL::TypeKinds::NON_NULL
end

#list? ⇒ Boolean

Returns True if this type wraps a list type.

Returns:

  • (Boolean) —

    True if this type wraps a list type



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# File 'lib/graphql/schema/non_null.rb', line 22

def list?
  @of_type.list?
end

#non_null? ⇒ true

Returns:

  • (true) 


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# File 'lib/graphql/schema/non_null.rb', line 17

def non_null?
  true
end

#to_type_signature ⇒ Object 



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# File 'lib/graphql/schema/non_null.rb', line 26

def to_type_signature
  "#{@of_type.to_type_signature}!"
end

#validate_input(value, ctx) ⇒ Object 



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# File 'lib/graphql/schema/non_null.rb', line 34

def validate_input(value, ctx)
  if value.nil?
    result = GraphQL::Query::InputValidationResult.new
    result.add_problem("Expected value to not be null")
    result
  else
    of_type.validate_input(value, ctx)
  end
end