Class | Sequel::Model::Associations::ManyToOneAssociationReflection |
In: |
lib/sequel/model/associations.rb
|
Parent: | AssociationReflection |
many_to_one associations can only have associated objects if none of the :keys options have a nil value.
# 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.
# 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.
# 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.
# 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
# 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
# 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
# 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
# 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).
# 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.
# 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.
# 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).
# 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
# 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.
# 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.
# File lib/sequel/model/associations.rb, line 817 817: def returns_array? 818: false 819: end