diff options
Diffstat (limited to 'activerecord/lib')
| -rw-r--r-- | activerecord/lib/active_record/querying.rb | 1 | ||||
| -rw-r--r-- | activerecord/lib/active_record/relation.rb | 26 |
2 files changed, 27 insertions, 0 deletions
diff --git a/activerecord/lib/active_record/querying.rb b/activerecord/lib/active_record/querying.rb index 13e09eda53..45f6a78428 100644 --- a/activerecord/lib/active_record/querying.rb +++ b/activerecord/lib/active_record/querying.rb @@ -3,6 +3,7 @@ module ActiveRecord module Querying delegate :find, :take, :take!, :first, :first!, :last, :last!, :exists?, :any?, :many?, :to => :all delegate :first_or_create, :first_or_create!, :first_or_initialize, :to => :all + delegate :find_or_create_by, :find_or_create_by!, :find_or_initialize_by, :to => :all delegate :find_by, :find_by!, :to => :all delegate :destroy, :destroy_all, :delete, :delete_all, :update, :update_all, :to => :all delegate :find_each, :find_in_batches, :to => :all diff --git a/activerecord/lib/active_record/relation.rb b/activerecord/lib/active_record/relation.rb index ecce7c703b..d106fceca2 100644 --- a/activerecord/lib/active_record/relation.rb +++ b/activerecord/lib/active_record/relation.rb @@ -133,6 +133,10 @@ module ActiveRecord # # Expects arguments in the same format as +Base.create+. # + # Note that the <tt>create</tt> will execute within the context of this scope, and that may for example + # affect the result of queries within callbacks. If you don't want this, use the <tt>find_or_create_by</tt> + # method. + # # ==== Examples # # Find the first user named Penélope or create a new one. # User.where(:first_name => 'Penélope').first_or_create @@ -171,6 +175,28 @@ module ActiveRecord first || new(attributes, &block) end + # Finds the first record with the given attributes, or creates it if one does not exist. + # + # See also <tt>first_or_create</tt>. + # + # ==== Examples + # # Find the first user named Penélope or create a new one. + # User.find_or_create_by(first_name: 'Penélope') + # # => <User id: 1, first_name: 'Penélope', last_name: nil> + def find_or_create_by(attributes, &block) + find_by(attributes) || create(attributes, &block) + end + + # Like <tt>find_or_create_by</tt>, but calls <tt>create!</tt> so an exception is raised if the created record is invalid. + def find_or_create_by!(attributes, &block) + find_by(attributes) || create!(attributes, &block) + end + + # Like <tt>find_or_create_by</tt>, but calls <tt>new</tt> instead of <tt>create</tt>. + def find_or_initialize_by(attributes, &block) + find_by(attributes) || new(attributes, &block) + end + # Runs EXPLAIN on the query or queries triggered by this relation and # returns the result as a string. The string is formatted imitating the # ones printed by the database shell. |