diff options
Diffstat (limited to 'activerecord/lib/active_record')
11 files changed, 103 insertions, 76 deletions
diff --git a/activerecord/lib/active_record/associations/collection_association.rb b/activerecord/lib/active_record/associations/collection_association.rb index 9f2c7292ea..2dca6b612e 100644 --- a/activerecord/lib/active_record/associations/collection_association.rb +++ b/activerecord/lib/active_record/associations/collection_association.rb @@ -136,6 +136,14 @@ module ActiveRecord 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 diff --git a/activerecord/lib/active_record/associations/collection_proxy.rb b/activerecord/lib/active_record/associations/collection_proxy.rb index fe693cfbb6..2a9627a474 100644 --- a/activerecord/lib/active_record/associations/collection_proxy.rb +++ b/activerecord/lib/active_record/associations/collection_proxy.rb @@ -197,6 +197,16 @@ module ActiveRecord @association.forty_two(*args) end + # Same as #first except returns only the third-to-last record. + def third_to_last(*args) + @association.third_to_last(*args) + end + + # Same as #first except returns only the second-to-last record. + def second_to_last(*args) + @association.second_to_last(*args) + end + # Returns the last record, or the last +n+ records, from the collection. # If the collection is empty, the first form returns +nil+, and the second # form returns an empty array. diff --git a/activerecord/lib/active_record/attribute_methods.rb b/activerecord/lib/active_record/attribute_methods.rb index 423a93964e..e902eb7531 100644 --- a/activerecord/lib/active_record/attribute_methods.rb +++ b/activerecord/lib/active_record/attribute_methods.rb @@ -34,30 +34,6 @@ module ActiveRecord BLACKLISTED_CLASS_METHODS = %w(private public protected allocate new name parent superclass) - class AttributeMethodCache - def initialize - @module = Module.new - @method_cache = Concurrent::Map.new - end - - def [](name) - @method_cache.compute_if_absent(name) do - safe_name = name.unpack('h*'.freeze).first - temp_method = "__temp__#{safe_name}" - ActiveRecord::AttributeMethods::AttrNames.set_name_cache safe_name, name - @module.module_eval method_body(temp_method, safe_name), __FILE__, __LINE__ - @module.instance_method temp_method - end - end - - private - - # Override this method in the subclasses for method body. - def method_body(method_name, const_name) - raise NotImplementedError, "Subclasses must implement a method_body(method_name, const_name) method." - end - end - class GeneratedAttributeMethods < Module; end # :nodoc: module ClassMethods diff --git a/activerecord/lib/active_record/attribute_methods/read.rb b/activerecord/lib/active_record/attribute_methods/read.rb index 5197e21fa4..ab2ecaa7c5 100644 --- a/activerecord/lib/active_record/attribute_methods/read.rb +++ b/activerecord/lib/active_record/attribute_methods/read.rb @@ -1,8 +1,11 @@ module ActiveRecord module AttributeMethods module Read - ReaderMethodCache = Class.new(AttributeMethodCache) { - private + extend ActiveSupport::Concern + + module ClassMethods + protected + # We want to generate the methods via module_eval rather than # define_method, because define_method is slower on dispatch. # Evaluating many similar methods may use more memory as the instruction @@ -21,21 +24,6 @@ module ActiveRecord # to allocate an object on each call to the attribute method. # Making it frozen means that it doesn't get duped when used to # key the @attributes in read_attribute. - def method_body(method_name, const_name) - <<-EOMETHOD - def #{method_name} - name = ::ActiveRecord::AttributeMethods::AttrNames::ATTR_#{const_name} - _read_attribute(name) { |n| missing_attribute(n, caller) } - end - EOMETHOD - end - }.new - - extend ActiveSupport::Concern - - module ClassMethods - protected - def define_method_attribute(name) safe_name = name.unpack('h*'.freeze).first temp_method = "__temp__#{safe_name}" diff --git a/activerecord/lib/active_record/attribute_methods/write.rb b/activerecord/lib/active_record/attribute_methods/write.rb index bbf2a51a0e..5599b590ca 100644 --- a/activerecord/lib/active_record/attribute_methods/write.rb +++ b/activerecord/lib/active_record/attribute_methods/write.rb @@ -1,19 +1,6 @@ module ActiveRecord module AttributeMethods module Write - WriterMethodCache = Class.new(AttributeMethodCache) { - private - - def method_body(method_name, const_name) - <<-EOMETHOD - def #{method_name}(value) - name = ::ActiveRecord::AttributeMethods::AttrNames::ATTR_#{const_name} - write_attribute(name, value) - end - EOMETHOD - end - }.new - extend ActiveSupport::Concern included do diff --git a/activerecord/lib/active_record/connection_adapters/abstract/database_statements.rb b/activerecord/lib/active_record/connection_adapters/abstract/database_statements.rb index 7e0c9f7837..bb5119d64e 100644 --- a/activerecord/lib/active_record/connection_adapters/abstract/database_statements.rb +++ b/activerecord/lib/active_record/connection_adapters/abstract/database_statements.rb @@ -27,10 +27,10 @@ module ActiveRecord end # Returns an ActiveRecord::Result instance. - def select_all(arel, name = nil, binds = []) + def select_all(arel, name = nil, binds = [], preparable: nil) arel, binds = binds_from_relation arel, binds sql = to_sql(arel, binds) - if arel.is_a?(String) + if arel.is_a?(String) && preparable.nil? preparable = false else preparable = visitor.preparable diff --git a/activerecord/lib/active_record/connection_adapters/abstract/query_cache.rb b/activerecord/lib/active_record/connection_adapters/abstract/query_cache.rb index 5e27cfe507..33dbab41cb 100644 --- a/activerecord/lib/active_record/connection_adapters/abstract/query_cache.rb +++ b/activerecord/lib/active_record/connection_adapters/abstract/query_cache.rb @@ -61,11 +61,11 @@ module ActiveRecord @query_cache.clear end - def select_all(arel, name = nil, binds = []) + def select_all(arel, name = nil, binds = [], preparable: nil) if @query_cache_enabled && !locked?(arel) arel, binds = binds_from_relation arel, binds sql = to_sql(arel, binds) - cache_sql(sql, binds) { super(sql, name, binds) } + cache_sql(sql, binds) { super(sql, name, binds, preparable: visitor.preparable) } else super end diff --git a/activerecord/lib/active_record/querying.rb b/activerecord/lib/active_record/querying.rb index 1f429cfd94..de5b42e987 100644 --- a/activerecord/lib/active_record/querying.rb +++ b/activerecord/lib/active_record/querying.rb @@ -1,7 +1,7 @@ module ActiveRecord module Querying delegate :find, :take, :take!, :first, :first!, :last, :last!, :exists?, :any?, :many?, to: :all - delegate :second, :second!, :third, :third!, :fourth, :fourth!, :fifth, :fifth!, :forty_two, :forty_two!, to: :all + delegate :second, :second!, :third, :third!, :fourth, :fourth!, :fifth, :fifth!, :forty_two, :forty_two!, :third_to_last, :third_to_last!, :second_to_last, :second_to_last!, 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 @@ -35,8 +35,8 @@ module ActiveRecord # # Post.find_by_sql ["SELECT title FROM posts WHERE author = ? AND created > ?", author_id, start_date] # Post.find_by_sql ["SELECT body FROM comments WHERE author = :user_id OR approved_by = :user_id", { :user_id => user_id }] - def find_by_sql(sql, binds = []) - result_set = connection.select_all(sanitize_sql(sql), "#{name} Load", binds) + def find_by_sql(sql, binds = [], preparable: nil) + result_set = connection.select_all(sanitize_sql(sql), "#{name} Load", binds, preparable: preparable) column_types = result_set.column_types.dup columns_hash.each_key { |k| column_types.delete k } message_bus = ActiveSupport::Notifications.instrumenter diff --git a/activerecord/lib/active_record/reflection.rb b/activerecord/lib/active_record/reflection.rb index 99c0e71f97..956fe7c51e 100644 --- a/activerecord/lib/active_record/reflection.rb +++ b/activerecord/lib/active_record/reflection.rb @@ -239,6 +239,10 @@ module ActiveRecord def alias_candidate(name) "#{plural_name}_#{name}" end + + def chain + collect_join_chain + end end # Base class for AggregateReflection and AssociationReflection. Objects of @@ -421,7 +425,7 @@ module ActiveRecord # A chain of reflections from this one back to the owner. For more see the explanation in # ThroughReflection. - def chain + def collect_join_chain [self] end @@ -495,6 +499,18 @@ module ActiveRecord VALID_AUTOMATIC_INVERSE_MACROS = [:has_many, :has_one, :belongs_to] INVALID_AUTOMATIC_INVERSE_OPTIONS = [:conditions, :through, :polymorphic, :foreign_key] + def add_as_source(seed) + seed + end + + def add_as_polymorphic_through(reflection, seed) + seed + [PolymorphicReflection.new(self, reflection)] + end + + def add_as_through(seed) + seed + [self] + end + protected def actual_source_reflection # FIXME: this is a horrible name @@ -742,19 +758,8 @@ module ActiveRecord # # => [<ActiveRecord::Reflection::ThroughReflection: @delegate_reflection=#<ActiveRecord::Reflection::HasManyReflection: @name=:tags...>, # <ActiveRecord::Reflection::HasManyReflection: @name=:taggings, @options={}, @active_record=Post>] # - def chain - @chain ||= begin - a = source_reflection.chain - b = through_reflection.chain.map(&:dup) - - if options[:source_type] - b[0] = PolymorphicReflection.new(b[0], self) - end - - chain = a + b - chain[0] = self # Use self so we don't lose the information from :source_type - chain - end + def collect_join_chain + collect_join_reflections [self] end # This is for clearing cache on the reflection. Useful for tests that need to compare @@ -913,6 +918,27 @@ module ActiveRecord scope_chain end + def add_as_source(seed) + collect_join_reflections seed + end + + def add_as_polymorphic_through(reflection, seed) + collect_join_reflections(seed + [PolymorphicReflection.new(self, reflection)]) + end + + def add_as_through(seed) + collect_join_reflections(seed + [self]) + end + + def collect_join_reflections(seed) + a = source_reflection.add_as_source seed + if options[:source_type] + through_reflection.add_as_polymorphic_through self, a + else + through_reflection.add_as_through a + end + end + protected def actual_source_reflection # FIXME: this is a horrible name diff --git a/activerecord/lib/active_record/relation/finder_methods.rb b/activerecord/lib/active_record/relation/finder_methods.rb index d48bcea28a..a4280c5f33 100644 --- a/activerecord/lib/active_record/relation/finder_methods.rb +++ b/activerecord/lib/active_record/relation/finder_methods.rb @@ -242,6 +242,38 @@ module ActiveRecord find_nth! 41 end + # Find the third-to-last record. + # If no order is defined it will order by primary key. + # + # Person.third_to_last # returns the third-to-last object fetched by SELECT * FROM people + # Person.offset(3).third_to_last # returns the third-to-last object from OFFSET 3 + # Person.where(["user_name = :u", { u: user_name }]).third_to_last + def third_to_last + find_nth(-3) + end + + # Same as #third_to_last but raises ActiveRecord::RecordNotFound if no record + # is found. + def third_to_last! + find_nth!(-3) + end + + # Find the second-to-last record. + # If no order is defined it will order by primary key. + # + # Person.second_to_last # returns the second-to-last object fetched by SELECT * FROM people + # Person.offset(3).second_to_last # returns the second-to-last object from OFFSET 3 + # Person.where(["user_name = :u", { u: user_name }]).second_to_last + def second_to_last + find_nth(-2) + end + + # Same as #second_to_last but raises ActiveRecord::RecordNotFound if no record + # is found. + def second_to_last! + find_nth!(-2) + end + # Returns true if a record exists in the table that matches the +id+ or # conditions given, or false otherwise. The argument can take six forms: # diff --git a/activerecord/lib/active_record/statement_cache.rb b/activerecord/lib/active_record/statement_cache.rb index f6b0efb88a..6c896ccea6 100644 --- a/activerecord/lib/active_record/statement_cache.rb +++ b/activerecord/lib/active_record/statement_cache.rb @@ -106,7 +106,7 @@ module ActiveRecord sql = query_builder.sql_for bind_values, connection - klass.find_by_sql sql, bind_values + klass.find_by_sql(sql, bind_values, preparable: true) end alias :call :execute end |