Exception: GraphQL::InvalidNullError

Inherits:
Error
  • Object
show all
Defined in:
lib/graphql/invalid_null_error.rb

Overview

Raised automatically when a field’s resolve function returns nil for a non-null field.

Class Attribute Summary collapse

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(parent_type, field, value, ast_node) ⇒ InvalidNullError

Returns a new instance of InvalidNullError.



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# File 'lib/graphql/invalid_null_error.rb', line 18

def initialize(parent_type, field, value, ast_node)
  @parent_type = parent_type
  @field = field
  @value = value
  @ast_node = ast_node
  super("Cannot return null for non-nullable field #{@parent_type.graphql_name}.#{@field.graphql_name}")
end

Class Attribute Details

.parent_class ⇒ Object

Returns the value of attribute parent_class.



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# File 'lib/graphql/invalid_null_error.rb', line 27

def parent_class
  @parent_class
end

Instance Attribute Details

#ast_node ⇒ GraphQL::Language::Nodes::Field (readonly)

Returns the field where the error occurred.

Returns:



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# File 'lib/graphql/invalid_null_error.rb', line 16

def ast_node
  @ast_node
end

#field ⇒ GraphQL::Field (readonly)

Returns The field which failed to return a value.

Returns:

  • (GraphQL::Field) —

    The field which failed to return a value



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# File 'lib/graphql/invalid_null_error.rb', line 10

def field
  @field
end

#parent_type ⇒ GraphQL::BaseType (readonly)

Returns The owner of #field.

Returns:

  • (GraphQL::BaseType) —

    The owner of #field



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# File 'lib/graphql/invalid_null_error.rb', line 7

def parent_type
  @parent_type
end

#value ⇒ nil, GraphQL::ExecutionError (readonly)

Returns The invalid value for this field.

Returns:



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# File 'lib/graphql/invalid_null_error.rb', line 13

def value
  @value
end

Class Method Details

.inspect ⇒ Object 



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# File 'lib/graphql/invalid_null_error.rb', line 35

def inspect
  if (name.nil? || parent_class&.name.nil?) && parent_class.respond_to?(:mutation) && (mutation = parent_class.mutation)
    "#{mutation.inspect}::#{parent_class.graphql_name}::InvalidNullError"
  else
    super
  end
end

.subclass_for(parent_class) ⇒ Object 



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# File 'lib/graphql/invalid_null_error.rb', line 29

def subclass_for(parent_class)
  subclass = Class.new(self)
  subclass.parent_class = parent_class
  subclass
end