| 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 325
325: def can_have_associated_objects?(obj)
326: !self[:keys].any?{|k| obj.send(k).nil?}
327: end
Whether the dataset needs a primary key to function, false for many_to_one associations.
# File lib/sequel/model/associations.rb, line 330
330: def dataset_need_primary_key?
331: false
332: 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 336
336: def default_key
337:
338: "#{self[:name]}_id"
339: 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 342
342: def eager_graph_lazy_dataset?
343: self[:key].nil?
344: end
many_to_one associations don‘t need an eager limit strategy
# File lib/sequel/model/associations.rb, line 347
347: def eager_limit_strategy
348: nil
349: end
The expression to use on the left hand side of the IN lookup when eager loading
# File lib/sequel/model/associations.rb, line 352
352: def predicate_key
353: cached_fetch(:predicate_key){qualified_primary_key}
354: 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 357
357: def primary_key
358: cached_fetch(:primary_key){associated_class.primary_key}
359: 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 369
369: def primary_key_method
370: cached_fetch(:primary_key_method){primary_key}
371: 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 375
375: def primary_key_methods
376: cached_fetch(:primary_key_methods){Array(primary_key_method)}
377: 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 362
362: def primary_keys
363: cached_fetch(:primary_keys){Array(primary_key)}
364: end
primary_key qualified by the associated table
# File lib/sequel/model/associations.rb, line 380
380: def qualified_primary_key
381: cached_fetch(:qualified_primary_key){self[:qualify] == false ? primary_key : qualify_assoc(primary_key)}
382: end
True only if the reciprocal is a one_to_many association.
# File lib/sequel/model/associations.rb, line 385
385: def reciprocal_array?
386: !set_reciprocal_to_self?
387: 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 391
391: def returns_array?
392: false
393: end