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 740 740: def can_have_associated_objects?(obj) 741: !self[:keys].any?{|k| obj.get_column_value(k).nil?} 742: end
Whether the dataset needs a primary key to function, false for many_to_one associations.
# File lib/sequel/model/associations.rb, line 745 745: def dataset_need_primary_key? 746: false 747: 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 751 751: def default_key 752: 753: "#{self[:name]}_id" 754: 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 757 757: def eager_graph_lazy_dataset? 758: self[:key].nil? 759: end
many_to_one associations don‘t need an eager_graph limit strategy
# File lib/sequel/model/associations.rb, line 762 762: def eager_graph_limit_strategy(_) 763: nil 764: end
many_to_one associations don‘t need an eager limit strategy
# File lib/sequel/model/associations.rb, line 767 767: def eager_limit_strategy 768: nil 769: end
many_to_one associations don‘t need a filter by associations limit strategy
# File lib/sequel/model/associations.rb, line 772 772: def filter_by_associations_limit_strategy 773: nil 774: end
The expression to use on the left hand side of the IN lookup when eager loading
# File lib/sequel/model/associations.rb, line 777 777: def predicate_key 778: cached_fetch(:predicate_key){qualified_primary_key} 779: 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 782 782: def primary_key 783: cached_fetch(:primary_key){associated_class.primary_key || raise(Error, "no primary key specified for #{associated_class.inspect}")} 784: 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 794 794: def primary_key_method 795: cached_fetch(:primary_key_method){primary_key} 796: 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 800 800: def primary_key_methods 801: cached_fetch(:primary_key_methods){Array(primary_key_method)} 802: 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 787 787: def primary_keys 788: cached_fetch(:primary_keys){Array(primary_key)} 789: end
primary_key qualified by the associated table
# File lib/sequel/model/associations.rb, line 805 805: def qualified_primary_key 806: cached_fetch(:qualified_primary_key){self[:qualify] == false ? primary_key : qualify_assoc(primary_key)} 807: end
True only if the reciprocal is a one_to_many association.
# File lib/sequel/model/associations.rb, line 810 810: def reciprocal_array? 811: !set_reciprocal_to_self? 812: 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 816 816: def returns_array? 817: false 818: end