Class: ActiveRecord::Associations::HasOneAssociation
- Inherits:
-
SingularAssociation
- Object
- Association
- SingularAssociation
- ActiveRecord::Associations::HasOneAssociation
- Defined in:
- lib/active_record/associations/has_one_association.rb
Overview
:nodoc:
Direct Known Subclasses
Instance Attribute Summary
Attributes inherited from Association
#inversed, #owner, #reflection, #target
Instance Method Summary collapse
- #delete(method = options[:dependent]) ⇒ Object
- #handle_dependency ⇒ Object
- #replace(record, save = true) ⇒ Object
Methods inherited from SingularAssociation
#build, #create, #create!, #reader, #writer
Methods inherited from Association
#aliased_table_name, #association_scope, #initialize, #initialize_attributes, #interpolate, #klass, #load_target, #loaded!, #loaded?, #marshal_dump, #marshal_load, #reload, #reset, #reset_scope, #scope, #set_inverse_instance, #stale_target?, #target_scope
Constructor Details
This class inherits a constructor from ActiveRecord::Associations::Association
Instance Method Details
#delete(method = options[:dependent]) ⇒ Object
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# File 'lib/active_record/associations/has_one_association.rb', line 53 def delete(method = [:dependent]) if load_target case method when :delete target.delete when :destroy target.destroy when :nullify target.update_columns(reflection.foreign_key => nil) end end end |
#handle_dependency ⇒ Object
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# File 'lib/active_record/associations/has_one_association.rb', line 7 def handle_dependency case [:dependent] when :restrict_with_exception raise ActiveRecord::DeleteRestrictionError.new(reflection.name) if load_target when :restrict_with_error if load_target record = klass.human_attribute_name(reflection.name).downcase owner.errors.add(:base, :"restrict_dependent_destroy.one", record: record) false end else delete end end |
#replace(record, save = true) ⇒ Object
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# File 'lib/active_record/associations/has_one_association.rb', line 24 def replace(record, save = true) raise_on_type_mismatch!(record) if record load_target return self.target if !(target || record) assigning_another_record = target != record if assigning_another_record || record.changed? save &&= owner.persisted? transaction_if(save) do remove_target!([:dependent]) if target && !target.destroyed? && assigning_another_record if record set_owner_attributes(record) set_inverse_instance(record) if save && !record.save nullify_owner_attributes(record) set_owner_attributes(target) if target raise RecordNotSaved, "Failed to save the new associated #{reflection.name}." end end end end self.target = record end |