Exception: GraphQL::InvalidNullError

Inherits:

Error

• Object
• StandardError
• Error
• GraphQL::InvalidNullError

Defined in:

lib/graphql/invalid_null_error.rb

Overview

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

Instance Method Summary

• #initialize(field_name, value) ⇒ InvalidNullError constructor

  A new instance of InvalidNullError.

• #parent_error? ⇒ Boolean

  Whether the null in question was caused by another error.

• #to_h ⇒ Hash

  An entry for the response’s “errors” key.

Constructor Details

#initialize(field_name, value) ⇒ InvalidNullError

# File 'lib/graphql/invalid_null_error.rb', line 5

def initialize(field_name, value)
  @field_name = field_name
  @value = value
end

Instance Method Details

#parent_error? ⇒ Boolean

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

def parent_error?
  @value.is_a?(GraphQL::ExecutionError)
end

#to_h ⇒ Hash

# File 'lib/graphql/invalid_null_error.rb', line 11

def to_h
  {
    "message" => "Cannot return null for non-nullable field #{@field_name}"
  }
end