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 320 320: def can_have_associated_objects?(obj) 321: !self[:keys].any?{|k| obj.send(k).nil?} 322: end
Whether the dataset needs a primary key to function, false for many_to_one associations.
# File lib/sequel/model/associations.rb, line 325 325: def dataset_need_primary_key? 326: false 327: 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 331 331: def default_key 332: 333: "#{self[:name]}_id" 334: 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 337 337: def eager_graph_lazy_dataset? 338: self[:key].nil? 339: end
many_to_one associations don‘t need an eager limit strategy
# File lib/sequel/model/associations.rb, line 342 342: def eager_limit_strategy 343: nil 344: end
The expression to use on the left hand side of the IN lookup when eager loading
# File lib/sequel/model/associations.rb, line 347 347: def predicate_key 348: cached_fetch(:predicate_key){qualified_primary_key} 349: 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 352 352: def primary_key 353: cached_fetch(:primary_key){associated_class.primary_key} 354: 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 364 364: def primary_key_method 365: cached_fetch(:primary_key_method){primary_key} 366: 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 370 370: def primary_key_methods 371: cached_fetch(:primary_key_methods){Array(primary_key_method)} 372: 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 357 357: def primary_keys 358: cached_fetch(:primary_keys){Array(primary_key)} 359: end
primary_key qualified by the associated table
# File lib/sequel/model/associations.rb, line 375 375: def qualified_primary_key 376: cached_fetch(:qualified_primary_key){self[:qualify] == false ? primary_key : qualify_assoc(primary_key)} 377: end
True only if the reciprocal is a one_to_many association.
# File lib/sequel/model/associations.rb, line 380 380: def reciprocal_array? 381: !set_reciprocal_to_self? 382: 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 386 386: def returns_array? 387: false 388: end