module Sequel::Model::Associations::SingularAssociationReflection

  1. lib/sequel/model/associations.rb

Methods that turn an association that returns multiple objects into an association that returns a single object.

Public Instance methods

assign_singular?()

Singular associations do not assign singular if they are using the ruby eager limit strategy and have a slice range, since they need to store the array of associated objects in order to pick the correct one with an offset.

[show source] 
     # File lib/sequel/model/associations.rb
1152 def assign_singular?
1153   super && (eager_limit_strategy != :ruby || !slice_range)
1154 end
filter_by_associations_add_conditions?()

Add conditions when filtering by singular associations with orders, since the underlying relationship is probably not one-to-one.

[show source] 
     # File lib/sequel/model/associations.rb
1158 def filter_by_associations_add_conditions?
1159   super || self[:order] || self[:eager_limit_strategy] || self[:filter_limit_strategy]
1160 end
limit_and_offset()

Make sure singular associations always have 1 as the limit

[show source] 
     # File lib/sequel/model/associations.rb
1163 def limit_and_offset
1164   r = super
1165   if r.first == 1
1166     r
1167   else
1168     [1, r[1]]
1169   end
1170 end
returns_array?()

Singular associations always return a single object, not an array.

[show source] 
     # File lib/sequel/model/associations.rb
1173 def returns_array?
1174   false
1175 end