diff options
Diffstat (limited to 'activerecord/lib/active_record/relation/finder_methods.rb')
| -rw-r--r-- | activerecord/lib/active_record/relation/finder_methods.rb | 27 |
1 files changed, 17 insertions, 10 deletions
diff --git a/activerecord/lib/active_record/relation/finder_methods.rb b/activerecord/lib/active_record/relation/finder_methods.rb index 32d1cff6c3..7eeb3dde70 100644 --- a/activerecord/lib/active_record/relation/finder_methods.rb +++ b/activerecord/lib/active_record/relation/finder_methods.rb @@ -83,7 +83,7 @@ module ActiveRecord # # Example for find with a lock: Imagine two concurrent transactions: # each will read <tt>person.visits == 2</tt>, add 1 to it, and save, resulting - # in two saves of <tt>person.visits = 3</tt>. By locking the row, the second + # in two saves of <tt>person.visits = 3</tt>. By locking the row, the second # transaction has to wait until the first is finished; we get the # expected <tt>person.visits == 4</tt>. # @@ -114,7 +114,7 @@ module ActiveRecord def first(*args) if args.any? if args.first.kind_of?(Integer) || (loaded? && !args.first.kind_of?(Hash)) - to_a.first(*args) + limit(*args).to_a else apply_finder_options(args.first).first end @@ -134,7 +134,11 @@ module ActiveRecord def last(*args) if args.any? if args.first.kind_of?(Integer) || (loaded? && !args.first.kind_of?(Hash)) - to_a.last(*args) + if order_values.empty? && reorder_value.nil? + order("#{primary_key} DESC").limit(*args).reverse + else + to_a.last(*args) + end else apply_finder_options(args.first).last end @@ -180,7 +184,9 @@ module ActiveRecord # Person.exists?(:name => "David") # Person.exists?(['name LIKE ?', "%#{query}%"]) # Person.exists? - def exists?(id = nil) + def exists?(id = false) + return false if id.nil? + id = id.id if ActiveRecord::Base === id join_dependency = construct_join_dependency_for_association_find @@ -194,7 +200,7 @@ module ActiveRecord relation = relation.where(table[primary_key].eq(id)) if id end - connection.select_value(relation.to_sql) ? true : false + connection.select_value(relation, "#{name} Exists") ? true : false end protected @@ -202,7 +208,7 @@ module ActiveRecord def find_with_associations join_dependency = construct_join_dependency_for_association_find relation = construct_relation_for_association_find(join_dependency) - rows = connection.select_all(relation.to_sql, 'SQL', relation.bind_values) + rows = connection.select_all(relation, 'SQL', relation.bind_values) join_dependency.instantiate(rows) rescue ThrowResult [] @@ -226,7 +232,7 @@ module ActiveRecord end def apply_join_dependency(relation, join_dependency) - for association in join_dependency.join_associations + join_dependency.join_associations.each do |association| relation = association.join_relation(relation) end @@ -243,7 +249,7 @@ module ActiveRecord end def construct_limited_ids_condition(relation) - orders = relation.order_values + orders = relation.order_values.map { |val| val.presence }.compact values = @klass.connection.distinct("#{@klass.connection.quote_table_name table_name}.#{primary_key}", orders) relation = relation.dup @@ -259,11 +265,13 @@ module ActiveRecord if match.bang? && result.blank? raise RecordNotFound, "Couldn't find #{@klass.name} with #{conditions.to_a.collect {|p| p.join(' = ')}.join(', ')}" else + yield(result) if block_given? result end end def find_or_instantiator_by_attributes(match, attributes, *args) + options = args.size > 1 && args.last(2).all?{ |a| a.is_a?(Hash) } ? args.extract_options! : {} protected_attributes_for_create, unprotected_attributes_for_create = {}, {} args.each_with_index do |arg, i| if arg.is_a?(Hash) @@ -278,8 +286,7 @@ module ActiveRecord record = where(conditions).first unless record - record = @klass.new do |r| - r.assign_attributes(protected_attributes_for_create) + record = @klass.new(protected_attributes_for_create, options) do |r| r.assign_attributes(unprotected_attributes_for_create, :without_protection => true) end yield(record) if block_given? |