Module: Mongoid::Traversable::DiscriminatorAssignment Private
Do not use. This module is for internal use only.
Relationships & Source Files | |
Defined in: | lib/mongoid/traversable.rb |
Overview
Module used for prepending to the various discriminator_*= methods
Instance Attribute Summary
-
#discriminator_key=(value)
writeonly
Internal use only
Sets the discriminator key.
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#discriminator_value=(value) ⇒ String
writeonly
Internal use only
Returns the discriminator key.
Instance Attribute Details
#discriminator_key=(value) (writeonly)
Sets the discriminator key.
# File 'lib/mongoid/traversable.rb', line 100
def discriminator_key=(value) raise Errors::InvalidDiscriminatorKeyTarget.new(self, superclass) if hereditary? _mongoid_clear_types if value Mongoid::Fields::Validators::Macro.validate_field_name(self, value) value = value.to_s super else # When discriminator key is set to nil, replace the class's definition # of the discriminator key reader (provided by class_attribute earlier) # and re-delegate to Mongoid. class << self delegate :discriminator_key, to: ::Mongoid end end # This condition checks if the new discriminator key would overwrite # an existing field. # This condition also checks if the class has any descendants, because # if it doesn't then it doesn't need a discriminator key. return unless !fields.key?(discriminator_key) && !descendants.empty? default_proc = -> { self.class.discriminator_value } field(discriminator_key, default: default_proc, type: String) end
#discriminator_value=(value) ⇒ String (writeonly)
Returns the discriminator key.
# File 'lib/mongoid/traversable.rb', line 134
def discriminator_value=(value) value ||= name _mongoid_clear_types add_discriminator_mapping(value) @discriminator_value = value end