Class Sequel::Model::Associations::ManyToOneAssociationReflection
In: lib/sequel/model/associations.rb
Parent: AssociationReflection

Methods

Public Instance methods

associated_object_keys()

Alias for primary_keys

many_to_one associations can only have associated objects if none of the :keys options have a nil value.

[Source]

     # File lib/sequel/model/associations.rb, line 741
741:         def can_have_associated_objects?(obj)
742:           !self[:keys].any?{|k| obj.get_column_value(k).nil?}
743:         end

Whether the dataset needs a primary key to function, false for many_to_one associations.

[Source]

     # File lib/sequel/model/associations.rb, line 746
746:         def dataset_need_primary_key?
747:           false
748:         end

Default foreign key name symbol for foreign key in current model‘s table that points to the given association‘s table‘s primary key.

[Source]

     # File lib/sequel/model/associations.rb, line 752
752:         def default_key
753: 
754:           "#{self[:name]}_id"
755:         end

Whether to eagerly graph a lazy dataset, true for many_to_one associations only if the key is nil.

[Source]

     # File lib/sequel/model/associations.rb, line 758
758:         def eager_graph_lazy_dataset?
759:           self[:key].nil?
760:         end

many_to_one associations don‘t need an eager_graph limit strategy

[Source]

     # File lib/sequel/model/associations.rb, line 763
763:         def eager_graph_limit_strategy(_)
764:           nil
765:         end

many_to_one associations don‘t need an eager limit strategy

[Source]

     # File lib/sequel/model/associations.rb, line 768
768:         def eager_limit_strategy
769:           nil
770:         end

many_to_one associations don‘t need a filter by associations limit strategy

[Source]

     # File lib/sequel/model/associations.rb, line 773
773:         def filter_by_associations_limit_strategy
774:           nil
775:         end

The expression to use on the left hand side of the IN lookup when eager loading

[Source]

     # File lib/sequel/model/associations.rb, line 778
778:         def predicate_key
779:           cached_fetch(:predicate_key){qualified_primary_key}
780:         end

The column(s) in the associated table that the key in the current table references (either a symbol or an array).

[Source]

     # File lib/sequel/model/associations.rb, line 783
783:         def primary_key
784:          cached_fetch(:primary_key){associated_class.primary_key || raise(Error, "no primary key specified for #{associated_class.inspect}")}
785:         end

The method symbol or array of method symbols to call on the associated object to get the value to use for the foreign keys.

[Source]

     # File lib/sequel/model/associations.rb, line 795
795:         def primary_key_method
796:          cached_fetch(:primary_key_method){primary_key}
797:         end

The array of method symbols to call on the associated object to get the value to use for the foreign keys.

[Source]

     # File lib/sequel/model/associations.rb, line 801
801:         def primary_key_methods
802:          cached_fetch(:primary_key_methods){Array(primary_key_method)}
803:         end

The columns in the associated table that the key in the current table references (always an array).

[Source]

     # File lib/sequel/model/associations.rb, line 788
788:         def primary_keys
789:          cached_fetch(:primary_keys){Array(primary_key)}
790:         end

primary_key qualified by the associated table

[Source]

     # File lib/sequel/model/associations.rb, line 806
806:         def qualified_primary_key
807:           cached_fetch(:qualified_primary_key){self[:qualify] == false ? primary_key : qualify_assoc(primary_key)}
808:         end

True only if the reciprocal is a one_to_many association.

[Source]

     # File lib/sequel/model/associations.rb, line 811
811:         def reciprocal_array?
812:           !set_reciprocal_to_self?
813:         end

Whether this association returns an array of objects instead of a single object, false for a many_to_one association.

[Source]

     # File lib/sequel/model/associations.rb, line 817
817:         def returns_array?
818:           false
819:         end

True only if the reciprocal is a one_to_one association.

[Source]

     # File lib/sequel/model/associations.rb, line 822
822:         def set_reciprocal_to_self?
823:           reciprocal
824:           reciprocal_type == :one_to_one
825:         end

[Validate]