| Class | Sequel::Model::Associations::ManyToManyAssociationReflection | 
| In: | lib/sequel/model/associations.rb | 
| Parent: | AssociationReflection | 
The alias to use for the associated key when eagerly loading
     # File lib/sequel/model/associations.rb, line 273
273:         def associated_key_alias
274:           self[:left_key_alias]
275:         end
          The column to use for the associated key when eagerly loading
     # File lib/sequel/model/associations.rb, line 278
278:         def associated_key_column
279:           self[:left_key]
280:         end
          The table containing the column to use for the associated key when eagerly loading
     # File lib/sequel/model/associations.rb, line 283
283:         def associated_key_table
284:           self[:join_table]
285:         end
          many_to_many associations can only have associated objects if none of the :left_primary_keys options have a nil value.
     # File lib/sequel/model/associations.rb, line 289
289:         def can_have_associated_objects?(obj)
290:           !self[:left_primary_keys].any?{|k| obj.send(k).nil?}
291:         end
          The default associated key alias(es) to use when eager loading associations via eager.
     # File lib/sequel/model/associations.rb, line 295
295:         def default_associated_key_alias
296:           self[:uses_left_composite_keys] ? (0...self[:left_keys].length).map{|i| "x_foreign_key_#{i}_x""x_foreign_key_#{i}_x"} : :x_foreign_key_x
297:         end
          Default name symbol for the join table.
     # File lib/sequel/model/associations.rb, line 300
300:         def default_join_table
301:           [self[:class_name], self[:model].name].map{|i| underscore(pluralize(demodulize(i)))}.sort.join('_').to_sym
302:         end
          Default foreign key name symbol for key in join table that points to current table‘s primary key (or :left_primary_key column).
     # File lib/sequel/model/associations.rb, line 306
306:         def default_left_key
307: 
308:           "#{underscore(demodulize(self[:model].name))}_id"
309:         end
          Default foreign key name symbol for foreign key in join table that points to the association‘s table‘s primary key (or :right_primary_key column).
     # File lib/sequel/model/associations.rb, line 312
312:         def default_right_key
313: 
314:           "#{singularize(self[:name])}_id"
315:         end
          The key to use for the key hash when eager loading
     # File lib/sequel/model/associations.rb, line 317
317:         def eager_loader_key
318:           self[:left_primary_key]
319:         end
          Whether the associated object needs a primary key to be added/removed, true for many_to_many associations.
     # File lib/sequel/model/associations.rb, line 328
328:         def need_associated_primary_key?
329:           true
330:         end
          Returns the reciprocal association symbol, if one exists.
     # File lib/sequel/model/associations.rb, line 333
333:         def reciprocal
334:           return self[:reciprocal] if include?(:reciprocal)
335:           left_keys = self[:left_keys]
336:           right_keys = self[:right_keys]
337:           join_table = self[:join_table]
338:           associated_class.all_association_reflections.each do |assoc_reflect|
339:             if assoc_reflect[:type] == :many_to_many && assoc_reflect[:left_keys] == right_keys &&
340:                assoc_reflect[:right_keys] == left_keys && assoc_reflect[:join_table] == join_table &&
341:                assoc_reflect.associated_class == self[:model]
342:               return self[:reciprocal] = assoc_reflect[:name]
343:             end
344:           end
345:           self[:reciprocal] = nil
346:         end
          The primary key column(s) to use in the associated table (can be symbol or array).
     # File lib/sequel/model/associations.rb, line 349
349:         def right_primary_key
350:           self[:right_primary_key] ||= associated_class.primary_key
351:         end
          The primary key columns to use in the associated table (always array).
     # File lib/sequel/model/associations.rb, line 354
354:         def right_primary_keys
355:           self[:right_primary_keys] ||= Array(right_primary_key)
356:         end
          The columns to select when loading the association, associated_class.table_name.* by default.
     # File lib/sequel/model/associations.rb, line 360
360:         def select
361:          return self[:select] if include?(:select)
362:          self[:select] ||= Sequel::SQL::ColumnAll.new(associated_class.table_name)
363:         end