diff options
Diffstat (limited to 'activerecord/lib/active_record/relation')
7 files changed, 76 insertions, 72 deletions
diff --git a/activerecord/lib/active_record/relation/calculations.rb b/activerecord/lib/active_record/relation/calculations.rb index d49472fc70..cb0b06cfdc 100644 --- a/activerecord/lib/active_record/relation/calculations.rb +++ b/activerecord/lib/active_record/relation/calculations.rb @@ -217,7 +217,7 @@ module ActiveRecord if operation == "count" column_name ||= select_for_count if column_name == :all - if distinct && (group_values.any? || !(has_limit_or_offset? && order_values.any?)) + if distinct && (group_values.any? || select_values.empty? && order_values.empty?) column_name = primary_key end elsif column_name =~ /\s*DISTINCT[\s(]+/i @@ -249,7 +249,7 @@ module ActiveRecord def execute_simple_calculation(operation, column_name, distinct) #:nodoc: column_alias = column_name - if operation == "count" && has_limit_or_offset? + if operation == "count" && (column_name == :all && distinct || has_limit_or_offset?) # Shortcut when limit is zero. return 0 if limit_value == 0 @@ -391,14 +391,12 @@ module ActiveRecord end def build_count_subquery(relation, column_name, distinct) - relation.select_values = [ - if column_name == :all - distinct ? table[Arel.star] : Arel.sql(FinderMethods::ONE_AS_ONE) - else - column_alias = Arel.sql("count_column") - aggregate_column(column_name).as(column_alias) - end - ] + if column_name == :all + relation.select_values = [ Arel.sql(FinderMethods::ONE_AS_ONE) ] unless distinct + else + column_alias = Arel.sql("count_column") + relation.select_values = [ aggregate_column(column_name).as(column_alias) ] + end subquery = relation.arel.as(Arel.sql("subquery_for_count")) select_value = operation_over_aggregate_column(column_alias || Arel.star, "count", false) diff --git a/activerecord/lib/active_record/relation/finder_methods.rb b/activerecord/lib/active_record/relation/finder_methods.rb index ff06ecbee1..5f959af5dc 100644 --- a/activerecord/lib/active_record/relation/finder_methods.rb +++ b/activerecord/lib/active_record/relation/finder_methods.rb @@ -148,7 +148,7 @@ module ActiveRecord # # [#<Person id:4>, #<Person id:3>, #<Person id:2>] def last(limit = nil) - return find_last(limit) if loaded? || limit_value + return find_last(limit) if loaded? || has_limit_or_offset? result = ordered_relation.limit(limit) result = result.reverse_order! @@ -313,7 +313,7 @@ module ActiveRecord return false if !conditions || limit_value == 0 if eager_loading? - relation = apply_join_dependency(construct_join_dependency(eager_loading: false)) + relation = apply_join_dependency(eager_loading: false) return relation.exists?(conditions) end @@ -358,24 +358,6 @@ module ActiveRecord offset_value || 0 end - def find_with_associations - # NOTE: the JoinDependency constructed here needs to know about - # any joins already present in `self`, so pass them in - # - # failing to do so means that in cases like activerecord/test/cases/associations/inner_join_association_test.rb:136 - # incorrect SQL is generated. In that case, the join dependency for - # SpecialCategorizations is constructed without knowledge of the - # preexisting join in joins_values to categorizations (by way of - # the `has_many :through` for categories). - # - join_dependency = construct_join_dependency - - relation = apply_join_dependency(join_dependency) - relation._select!(join_dependency.aliases.columns) - - yield relation, join_dependency - end - def construct_relation_for_exists(conditions) relation = except(:select, :distinct, :order)._select!(ONE_AS_ONE).limit!(1) @@ -391,22 +373,29 @@ module ActiveRecord def construct_join_dependency(eager_loading: true) including = eager_load_values + includes_values + joins = joins_values.select { |join| join.is_a?(Arel::Nodes::Join) } ActiveRecord::Associations::JoinDependency.new( - klass, table, including, alias_tracker(joins_values), eager_loading: eager_loading + klass, table, including, alias_tracker(joins), eager_loading: eager_loading ) end - def apply_join_dependency(join_dependency = construct_join_dependency) + def apply_join_dependency(eager_loading: true) + join_dependency = construct_join_dependency(eager_loading: eager_loading) relation = except(:includes, :eager_load, :preload).joins!(join_dependency) - if using_limitable_reflections?(join_dependency.reflections) - relation - else - if relation.limit_value + if eager_loading && !using_limitable_reflections?(join_dependency.reflections) + if has_limit_or_offset? limited_ids = limited_ids_for(relation) limited_ids.empty? ? relation.none! : relation.where!(primary_key => limited_ids) end - relation.except(:limit, :offset) + relation.limit_value = relation.offset_value = nil + end + + if block_given? + relation._select!(join_dependency.aliases.columns) + yield relation, join_dependency + else + relation end end @@ -532,7 +521,11 @@ module ActiveRecord else relation = ordered_relation - if limit_value.nil? || index < limit_value + if limit_value + limit = [limit_value - index, limit].min + end + + if limit > 0 relation = relation.offset(offset_index + index) unless index.zero? relation.limit(limit).to_a else @@ -547,12 +540,11 @@ module ActiveRecord else relation = ordered_relation - relation.to_a[-index] - # TODO: can be made more performant on large result sets by - # for instance, last(index)[-index] (which would require - # refactoring the last(n) finder method to make test suite pass), - # or by using a combination of reverse_order, limit, and offset, - # e.g., reverse_order.offset(index-1).first + if equal?(relation) || has_limit_or_offset? + relation.records[-index] + else + relation.last(index)[-index] + end end end diff --git a/activerecord/lib/active_record/relation/merger.rb b/activerecord/lib/active_record/relation/merger.rb index b736b21525..ebdd4144bb 100644 --- a/activerecord/lib/active_record/relation/merger.rb +++ b/activerecord/lib/active_record/relation/merger.rb @@ -52,7 +52,7 @@ module ActiveRecord NORMAL_VALUES = Relation::VALUE_METHODS - Relation::CLAUSE_METHODS - - [:includes, :preload, :joins, :order, :reverse_order, :lock, :create_with, :reordering] # :nodoc: + [:includes, :preload, :joins, :left_outer_joins, :order, :reverse_order, :lock, :create_with, :reordering] # :nodoc: def normal_values NORMAL_VALUES @@ -79,6 +79,7 @@ module ActiveRecord merge_clauses merge_preloads merge_joins + merge_outer_joins relation end @@ -129,6 +130,29 @@ module ActiveRecord end end + def merge_outer_joins + return if other.left_outer_joins_values.blank? + + if other.klass == relation.klass + relation.left_outer_joins!(*other.left_outer_joins_values) + else + alias_tracker = nil + joins_dependency = other.left_outer_joins_values.map do |join| + case join + when Hash, Symbol, Array + alias_tracker ||= other.alias_tracker + ActiveRecord::Associations::JoinDependency.new( + other.klass, other.table, join, alias_tracker + ) + else + join + end + end + + relation.left_outer_joins!(*joins_dependency) + end + end + def merge_multi_values if other.reordering_value # override any order specified in the original relation diff --git a/activerecord/lib/active_record/relation/predicate_builder/association_query_value.rb b/activerecord/lib/active_record/relation/predicate_builder/association_query_value.rb index 0255a65bfe..28c7483c95 100644 --- a/activerecord/lib/active_record/relation/predicate_builder/association_query_value.rb +++ b/activerecord/lib/active_record/relation/predicate_builder/association_query_value.rb @@ -30,7 +30,7 @@ module ActiveRecord end def primary_key - associated_table.association_join_keys.key + associated_table.association_join_primary_key end def convert_to_id(value) diff --git a/activerecord/lib/active_record/relation/predicate_builder/polymorphic_array_value.rb b/activerecord/lib/active_record/relation/predicate_builder/polymorphic_array_value.rb index b87b5c36dd..e8e2f2c626 100644 --- a/activerecord/lib/active_record/relation/predicate_builder/polymorphic_array_value.rb +++ b/activerecord/lib/active_record/relation/predicate_builder/polymorphic_array_value.rb @@ -29,7 +29,7 @@ module ActiveRecord end def primary_key(value) - associated_table.association_primary_key(base_class(value)) + associated_table.association_join_primary_key(base_class(value)) end def base_class(value) diff --git a/activerecord/lib/active_record/relation/query_methods.rb b/activerecord/lib/active_record/relation/query_methods.rb index 749223422f..86882c7ce7 100644 --- a/activerecord/lib/active_record/relation/query_methods.rb +++ b/activerecord/lib/active_record/relation/query_methods.rb @@ -327,8 +327,8 @@ module ActiveRecord end VALID_UNSCOPING_VALUES = Set.new([:where, :select, :group, :order, :lock, - :limit, :offset, :joins, :includes, :from, - :readonly, :having]) + :limit, :offset, :joins, :left_outer_joins, + :includes, :from, :readonly, :having]) # Removes an unwanted relation that is already defined on a chain of relations. # This is useful when passing around chains of relations and would like to @@ -375,10 +375,11 @@ module ActiveRecord args.each do |scope| case scope when Symbol + scope = :left_outer_joins if scope == :left_joins if !VALID_UNSCOPING_VALUES.include?(scope) raise ArgumentError, "Called unscope() with invalid unscoping argument ':#{scope}'. Valid arguments are :#{VALID_UNSCOPING_VALUES.to_a.join(", :")}." end - set_value(scope, nil) + set_value(scope, DEFAULT_VALUES[scope]) when Hash scope.each do |key, target_value| if key != :where @@ -444,15 +445,13 @@ module ActiveRecord # def left_outer_joins(*args) check_if_method_has_arguments!(__callee__, args) - - args.compact! - args.flatten! - spawn.left_outer_joins!(*args) end alias :left_joins :left_outer_joins def left_outer_joins!(*args) # :nodoc: + args.compact! + args.flatten! self.left_outer_joins_values += args self end @@ -907,7 +906,7 @@ module ActiveRecord protected # Returns a relation value with a given name def get_value(name) # :nodoc: - @values[name] || default_value_for(name) + @values.fetch(name, DEFAULT_VALUES[name]) end # Sets the relation value with the given name @@ -980,6 +979,8 @@ module ActiveRecord case join when Hash, Symbol, Array :association_join + when ActiveRecord::Associations::JoinDependency + :stashed_join else raise ArgumentError, "only Hash, Symbol and Array are allowed" end @@ -1015,7 +1016,7 @@ module ActiveRecord join_nodes = buckets[:join_node].uniq string_joins = buckets[:string_join].map(&:strip).uniq - join_list = join_nodes + convert_join_strings_to_ast(manager, string_joins) + join_list = join_nodes + convert_join_strings_to_ast(string_joins) alias_tracker = alias_tracker(join_list, aliases) join_dependency = ActiveRecord::Associations::JoinDependency.new( @@ -1030,7 +1031,7 @@ module ActiveRecord alias_tracker.aliases end - def convert_join_strings_to_ast(table, joins) + def convert_join_strings_to_ast(joins) joins .flatten .reject(&:blank?) @@ -1040,8 +1041,8 @@ module ActiveRecord def build_select(arel) if select_values.any? arel.project(*arel_columns(select_values.uniq)) - elsif @klass.ignored_columns.any? - arel.project(*arel_columns(@klass.column_names)) + elsif klass.ignored_columns.any? + arel.project(*klass.column_names.map { |field| arel_attribute(field) }) else arel.project(table[Arel.star]) end @@ -1121,7 +1122,7 @@ module ActiveRecord def preprocess_order_args(order_args) order_args.map! do |arg| - klass.send(:sanitize_sql_for_order, arg) + klass.sanitize_sql_for_order(arg) end order_args.flatten! @@ -1192,7 +1193,6 @@ module ActiveRecord DEFAULT_VALUES = { create_with: FROZEN_EMPTY_HASH, - readonly: false, where: Relation::WhereClause.empty, having: Relation::WhereClause.empty, from: Relation::FromClause.empty @@ -1201,15 +1201,5 @@ module ActiveRecord Relation::MULTI_VALUE_METHODS.each do |value| DEFAULT_VALUES[value] ||= FROZEN_EMPTY_ARRAY end - - Relation::SINGLE_VALUE_METHODS.each do |value| - DEFAULT_VALUES[value] = nil if DEFAULT_VALUES[value].nil? - end - - def default_value_for(name) - DEFAULT_VALUES.fetch(name) do - raise ArgumentError, "unknown relation value #{name.inspect}" - end - end end end diff --git a/activerecord/lib/active_record/relation/where_clause_factory.rb b/activerecord/lib/active_record/relation/where_clause_factory.rb index 1374785354..4ae94f4bfe 100644 --- a/activerecord/lib/active_record/relation/where_clause_factory.rb +++ b/activerecord/lib/active_record/relation/where_clause_factory.rb @@ -11,7 +11,7 @@ module ActiveRecord def build(opts, other) case opts when String, Array - parts = [klass.send(:sanitize_sql, other.empty? ? opts : ([opts] + other))] + parts = [klass.sanitize_sql(other.empty? ? opts : ([opts] + other))] when Hash attributes = predicate_builder.resolve_column_aliases(opts) attributes = klass.send(:expand_hash_conditions_for_aggregates, attributes) |