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| -rw-r--r-- | activerecord/lib/active_record/associations.rb | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/activerecord/lib/active_record/associations.rb b/activerecord/lib/active_record/associations.rb index 114e327926..02114fd4d6 100644 --- a/activerecord/lib/active_record/associations.rb +++ b/activerecord/lib/active_record/associations.rb @@ -1268,6 +1268,17 @@ module ActiveRecord # * <tt>Account#create_beneficiary</tt> (similar to <tt>b = Beneficiary.new("account_id" => id); b.save; b</tt>) # * <tt>Account#create_beneficiary!</tt> (similar to <tt>b = Beneficiary.new("account_id" => id); b.save!; b</tt>) # + # === Scopes + # + # You can pass a second argument +scope+ as a callable (i.e. proc or + # lambda) to retrieve a specific record or customize the generated query + # when you access the associated object. + # + # Scope examples: + # has_one :auther, -> { where(comment_id: 1) } + # has_one :employer, -> { joins(:company) } + # has_one :dob, ->(dob) { where("Date.new(2000, 01, 01) > ?", dob) } + # # === Options # # The declaration can also include an +options+ hash to specialize the behavior of the association. |