diff options
Diffstat (limited to 'activerecord/lib/active_record/associations/collection_association.rb')
| -rw-r--r-- | activerecord/lib/active_record/associations/collection_association.rb | 274 |
1 files changed, 59 insertions, 215 deletions
diff --git a/activerecord/lib/active_record/associations/collection_association.rb b/activerecord/lib/active_record/associations/collection_association.rb index 0eaa0a4f36..0437a79b84 100644 --- a/activerecord/lib/active_record/associations/collection_association.rb +++ b/activerecord/lib/active_record/associations/collection_association.rb @@ -24,18 +24,9 @@ module ActiveRecord # If you need to work on all current children, new and existing records, # +load_target+ and the +loaded+ flag are your friends. class CollectionAssociation < Association #:nodoc: - # Implements the reader method, e.g. foo.items for Foo.has_many :items - def reader(force_reload = false) - if force_reload - ActiveSupport::Deprecation.warn(<<-MSG.squish) - Passing an argument to force an association to reload is now - deprecated and will be removed in Rails 5.1. Please call `reload` - on the result collection proxy instead. - MSG - - klass.uncached { reload } - elsif stale_target? + def reader + if stale_target? reload end @@ -56,9 +47,7 @@ module ActiveRecord # Implements the ids reader method, e.g. foo.item_ids for Foo.has_many :items def ids_reader if loaded? - load_target.map do |record| - record.send(reflection.association_primary_key) - end + target.pluck(reflection.association_primary_key) else @association_ids ||= ( column = "#{reflection.quoted_table_name}.#{reflection.association_primary_key}" @@ -69,13 +58,17 @@ module ActiveRecord # Implements the ids writer method, e.g. foo.item_ids= for Foo.has_many :items def ids_writer(ids) - pk_type = reflection.primary_key_type + pk_type = reflection.association_primary_key_type ids = Array(ids).reject(&:blank?) ids.map! { |i| pk_type.cast(i) } records = klass.where(reflection.association_primary_key => ids).index_by do |r| r.send(reflection.association_primary_key) - end.values_at(*ids) - replace(records) + end.values_at(*ids).compact + if records.size != ids.size + klass.all.raise_record_not_found_exception!(ids, records.size, ids.size, reflection.association_primary_key) + else + replace(records) + end end def reset @@ -83,14 +76,6 @@ module ActiveRecord @target = [] end - def select(*fields) - if block_given? - load_target.select.each { |e| yield e } - else - scope.select(*fields) - end - end - def find(*args) if block_given? load_target.find(*args) { |*block_args| yield(*block_args) } @@ -112,52 +97,6 @@ module ActiveRecord end end - def first(*args) - first_nth_or_last(:first, *args) - end - - def second(*args) - first_nth_or_last(:second, *args) - end - - def third(*args) - first_nth_or_last(:third, *args) - end - - def fourth(*args) - first_nth_or_last(:fourth, *args) - end - - def fifth(*args) - first_nth_or_last(:fifth, *args) - end - - def forty_two(*args) - first_nth_or_last(:forty_two, *args) - end - - def third_to_last(*args) - first_nth_or_last(:third_to_last, *args) - end - - def second_to_last(*args) - first_nth_or_last(:second_to_last, *args) - end - - def last(*args) - first_nth_or_last(:last, *args) - end - - def take(n = nil) - if loaded? - n ? target.take(n) : target.first - else - scope.take(n).tap do |record| - set_inverse_instance record if record.is_a? ActiveRecord::Base - end - end - end - def build(attributes = {}, &block) if attributes.is_a?(Array) attributes.collect { |attr| build(attr, &block) } @@ -168,14 +107,6 @@ module ActiveRecord end end - def create(attributes = {}, &block) - _create_record(attributes, &block) - end - - def create!(attributes = {}, &block) - _create_record(attributes, true, &block) - end - # Add +records+ to this association. Returns +self+ so method calls may # be chained. Since << flattens its argument list and inserts each record, # +push+ and +concat+ behave identically. @@ -223,12 +154,12 @@ module ActiveRecord end dependent = if dependent - dependent - elsif options[:dependent] == :destroy - :delete_all - else - options[:dependent] - end + dependent + elsif options[:dependent] == :destroy + :delete_all + else + options[:dependent] + end delete_or_nullify_all_records(dependent).tap do reset @@ -246,31 +177,6 @@ module ActiveRecord end end - # Returns the number of records. If no arguments are given, it counts all - # columns using SQL. If one argument is given, it counts only the passed - # column using SQL. If a block is given, it counts the number of records - # yielding a true value. - def count(column_name = nil) - return super if block_given? - relation = scope - if association_scope.distinct_value - # This is needed because 'SELECT count(DISTINCT *)..' is not valid SQL. - column_name ||= reflection.klass.primary_key - relation = relation.distinct - end - - value = relation.count(column_name) - - limit = options[:limit] - offset = options[:offset] - - if limit || offset - [ [value - offset.to_i, 0].max, limit.to_i ].min - else - value - end - end - # Removes +records+ from this association calling +before_remove+ and # +after_remove+ callbacks. # @@ -280,11 +186,8 @@ module ActiveRecord # +delete_records+. They are in any case removed from the collection. def delete(*records) return if records.empty? - _options = records.extract_options! - dependent = _options[:dependent] || options[:dependent] - records = find(records) if records.any? { |record| record.kind_of?(Integer) || record.kind_of?(String) } - delete_or_destroy(records, dependent) + delete_or_destroy(records, options[:dependent]) end # Deletes the +records+ and removes them from this association calling @@ -310,14 +213,10 @@ module ActiveRecord # +count_records+, which is a method descendants have to provide. def size if !find_target? || loaded? - if association_scope.distinct_value - target.uniq.size - else - target.size - end - elsif !loaded? && !association_scope.group_values.empty? + target.size + elsif !association_scope.group_values.empty? load_target.size - elsif !loaded? && !association_scope.distinct_value && target.is_a?(Array) + elsif !association_scope.distinct_value && target.is_a?(Array) unsaved_records = target.select(&:new_record?) unsaved_records.size + count_records else @@ -325,15 +224,6 @@ module ActiveRecord end end - # Returns the size of the collection calling +size+ on the target. - # - # If the collection has been already loaded +length+ and +size+ are - # equivalent. If not and you are going to need the records anyway this - # method will take one less query. Otherwise +size+ is more efficient. - def length - load_target.size - end - # Returns true if the collection is empty. # # If the collection has been loaded @@ -350,36 +240,6 @@ module ActiveRecord end end - # Returns true if the collections is not empty. - # If block given, loads all records and checks for one or more matches. - # Otherwise, equivalent to +!collection.empty?+. - def any? - if block_given? - load_target.any? { |*block_args| yield(*block_args) } - else - !empty? - end - end - - # Returns true if the collection has more than 1 record. - # If block given, loads all records and checks for two or more matches. - # Otherwise, equivalent to +collection.size > 1+. - def many? - if block_given? - load_target.many? { |*block_args| yield(*block_args) } - else - size > 1 - end - end - - def distinct - seen = {} - load_target.find_all do |record| - seen[record.id] = true unless seen.key?(record.id) - end - end - alias uniq distinct - # Replace this collection with +other_array+. This will perform a diff # and delete/add only records that have changed. def replace(other_array) @@ -429,19 +289,28 @@ module ActiveRecord def replace_on_target(record, index, skip_callbacks) callback(:before_add, record) unless skip_callbacks - was_loaded = loaded? - yield(record) if block_given? + begin + if index + record_was = target[index] + target[index] = record + else + target << record + end + + set_inverse_instance(record) - unless !was_loaded && loaded? + yield(record) if block_given? + rescue if index - @target[index] = record + target[index] = record_was else - @target << record + target.delete(record) end + + raise end callback(:after_add, record) unless skip_callbacks - set_inverse_instance(record) record end @@ -456,26 +325,29 @@ module ActiveRecord owner.new_record? && !foreign_key_present? end - private - def get_records - return scope.to_a if skip_statement_cache? - - conn = klass.connection - sc = reflection.association_scope_cache(conn, owner) do - StatementCache.create(conn) { |params| - as = AssociationScope.create { params.bind } - target_scope.merge as.scope(self, conn) - } - end - - binds = AssociationScope.get_bind_values(owner, reflection.chain) - sc.execute binds, klass, klass.connection + def find_from_target? + loaded? || + owner.new_record? || + target.any? { |record| record.new_record? || record.changed? } end + private + def find_target - records = get_records - records.each { |record| set_inverse_instance(record) } - records + return scope.to_a if skip_statement_cache? + + conn = klass.connection + sc = reflection.association_scope_cache(conn, owner) do + StatementCache.create(conn) { |params| + as = AssociationScope.create { params.bind } + target_scope.merge as.scope(self, conn) + } + end + + binds = AssociationScope.get_bind_values(owner, reflection.chain) + sc.execute(binds, klass, conn) do |record| + set_inverse_instance(record) + end end # We have some records loaded from the database (persisted) and some that are @@ -495,7 +367,7 @@ module ActiveRecord persisted.map! do |record| if mem_record = memory.delete(record) - ((record.attribute_names & mem_record.attribute_names) - mem_record.changes.keys).each do |name| + ((record.attribute_names & mem_record.attribute_names) - mem_record.changed_attribute_names_to_save).each do |name| mem_record[name] = record[name] end @@ -555,8 +427,9 @@ module ActiveRecord records.each { |record| callback(:after_remove, record) } end - # Delete the given records from the association, using one of the methods :destroy, - # :delete_all or :nullify (or nil, in which case a default is used). + # Delete the given records from the association, + # using one of the methods +:destroy+, +:delete_all+ + # or +:nullify+ (or +nil+, in which case a default is used). def delete_records(records, method) raise NotImplementedError end @@ -605,25 +478,6 @@ module ActiveRecord owner.class.send(full_callback_name) end - # Should we deal with assoc.first or assoc.last by issuing an independent query to - # the database, or by getting the target, and then taking the first/last item from that? - # - # If the args is just a non-empty options hash, go to the database. - # - # Otherwise, go to the database only if none of the following are true: - # * target already loaded - # * owner is new record - # * target contains new or changed record(s) - def fetch_first_nth_or_last_using_find?(args) - if args.first.is_a?(Hash) - true - else - !(loaded? || - owner.new_record? || - target.any? { |record| record.new_record? || record.changed? }) - end - end - def include_in_memory?(record) if reflection.is_a?(ActiveRecord::Reflection::ThroughReflection) assoc = owner.association(reflection.through_reflection.name) @@ -650,16 +504,6 @@ module ActiveRecord load_target.select { |r| ids.include?(r.id.to_s) } end end - - # Fetches the first/last using SQL if possible, otherwise from the target array. - def first_nth_or_last(type, *args) - args.shift if args.first.is_a?(Hash) && args.first.empty? - - collection = fetch_first_nth_or_last_using_find?(args) ? scope : load_target - collection.send(type, *args).tap do |record| - set_inverse_instance record if record.is_a? ActiveRecord::Base - end - end end end end |