Class Sequel::Model::Associations::ManyToManyAssociationReflection
In: lib/sequel/model/associations.rb
Parent: AssociationReflection

Methods

Public Instance methods

Default name symbol for the join table.

[Source]

     # File lib/sequel/model/associations.rb, line 227
227:         def default_join_table
228:           [self[:class_name], self[:model].name].map{|i| underscore(pluralize(demodulize(i)))}.sort.join('_').to_sym
229:         end

Default foreign key name symbol for key in join table that points to current table‘s primary key (or :left_primary_key column).

[Source]

     # File lib/sequel/model/associations.rb, line 233
233:         def default_left_key
234: 
235:           "#{underscore(demodulize(self[:model].name))}_id"
236:         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).

[Source]

     # File lib/sequel/model/associations.rb, line 239
239:         def default_right_key
240: 
241:           "#{singularize(self[:name])}_id"
242:         end

The key to use for the key hash when eager loading

[Source]

     # File lib/sequel/model/associations.rb, line 244
244:         def eager_loader_key
245:           self[:left_primary_key]
246:         end

Whether the associated object needs a primary key to be added/removed, true for many_to_many associations.

[Source]

     # File lib/sequel/model/associations.rb, line 250
250:         def need_associated_primary_key?
251:           true
252:         end

Returns the reciprocal association symbol, if one exists.

[Source]

     # File lib/sequel/model/associations.rb, line 255
255:         def reciprocal
256:           return self[:reciprocal] if include?(:reciprocal)
257:           left_key = self[:left_key]
258:           right_key = self[:right_key]
259:           join_table = self[:join_table]
260:           associated_class.all_association_reflections.each do |assoc_reflect|
261:             if assoc_reflect[:type] == :many_to_many && assoc_reflect[:left_key] == right_key \
262:                && assoc_reflect[:right_key] == left_key && assoc_reflect[:join_table] == join_table
263:               return self[:reciprocal] = assoc_reflect[:name]
264:             end
265:           end
266:           self[:reciprocal] = nil
267:         end

The primary key column to use in the associated table.

[Source]

     # File lib/sequel/model/associations.rb, line 270
270:         def right_primary_key
271:           self[:right_primary_key] ||= associated_class.primary_key
272:         end

The columns to select when loading the association, associated_class.table_name.* by default.

[Source]

     # File lib/sequel/model/associations.rb, line 275
275:         def select
276:          return self[:select] if include?(:select)
277:          self[:select] ||= Sequel::SQL::ColumnAll.new(associated_class.table_name)
278:         end

[Validate]