has_one?

• Class methods (1)
• new
• Instance methods (76)
• active_record_primary_key
• actual_source_reflection
• add_as_polymorphic_through
• add_as_source
• add_as_through
• association_class
• association_foreign_key
• association_primary_key
• association_primary_key_type (<= v5.1.7)
• association_scope_cache
• automatic_inverse_of
• belongs_to?
• build_association (<= v4.1.8)
• calculate_constructable (<= v6.1.7.7)
• can_find_inverse_of_automat...
• chain (<= v4.2.9)
• check_eager_loadable!
• check_preloadable! (<= v6.1.7.7)
• check_validity!
• check_validity_of_inverse! (<= v4.2.1)
• clear_association_scope_cache
• collection?
• collect_join_chain
• collect_join_reflections
• columns (<= v4.0.2)
• compute_class
• conditions (<= v3.2.13)
• constraints
• constructable? (<= v6.1.7.7)
• counter_cache_column (<= v4.2.9)
• create_association (<= v3.0.9)
• create_association! (<= v3.0.9)
• dependent_conditions (<= v3.0.9)
• derive_class_name
• derive_fk_query_constraints
• derive_foreign_key
• derive_join_table (<= v7.0.0)
• derive_primary_key_name (<= v3.0.9)
• extensions
• foreign_key
• foreign_type (<= v4.0.2)
• has_and_belongs_to_many? (<= v4.0.2)
• has_inverse?
• has_one?
• has_scope?
• inverse_name
• inverse_of (<= v4.2.1)
• join_foreign_key
• join_id_for
• join_primary_key
• join_primary_type
• join_table
• klass (<= v5.1.7)
• macro
• nested?
• polymorphic?
• polymorphic_inverse_of
• polymorphic_name
• primary_key (<= v5.1.7)
• primary_key_column (<= v4.1.8)
• primary_key_name (<= v3.1.0)
• quoted_table_name (<= v4.1.8)
• reset_column_information (<= v4.0.2)
• scope_allows_automatic_inve...
• scope_chain (<= v5.0.0.1)
• source_options
• source_reflection
• source_reflection_name
• source_reflection_names
• table_name (<= v4.1.8)
• through_options
• through_reflection
• through_reflection_primary_... (<= v3.0.9)
• type (<= v4.0.2)
• validate?
• valid_inverse_reflection?

= private
= protected