diff options
Diffstat (limited to 'activerecord')
| -rw-r--r-- | activerecord/CHANGELOG.md | 10 | ||||
| -rw-r--r-- | activerecord/lib/active_record/connection_adapters/abstract_mysql_adapter.rb | 13 | ||||
| -rw-r--r-- | activerecord/lib/active_record/relation/finder_methods.rb | 49 | ||||
| -rw-r--r-- | activerecord/test/cases/base_test.rb | 1 | ||||
| -rw-r--r-- | activerecord/test/cases/column_definition_test.rb | 10 | ||||
| -rw-r--r-- | activerecord/test/cases/invalid_connection_test.rb | 2 | ||||
| -rw-r--r-- | activerecord/test/cases/relations_test.rb | 29 |
7 files changed, 85 insertions, 29 deletions
diff --git a/activerecord/CHANGELOG.md b/activerecord/CHANGELOG.md index 2551841aaf..9144ab6695 100644 --- a/activerecord/CHANGELOG.md +++ b/activerecord/CHANGELOG.md @@ -1,3 +1,13 @@ +* When calling `first` with a `limit` argument, return directly from the + `loaded?` records if available. + + *Ben Woosley* + +* Deprecate sending the `offset` argument to `find_nth`. Please use the + `offset` method on relation instead. + + *Ben Woosley* + ## Rails 5.0.0.beta1 (December 18, 2015) ## * Order the result of `find(ids)` to match the passed array, if the relation diff --git a/activerecord/lib/active_record/connection_adapters/abstract_mysql_adapter.rb b/activerecord/lib/active_record/connection_adapters/abstract_mysql_adapter.rb index 5ebd8a8dcb..37e4eb24a8 100644 --- a/activerecord/lib/active_record/connection_adapters/abstract_mysql_adapter.rb +++ b/activerecord/lib/active_record/connection_adapters/abstract_mysql_adapter.rb @@ -31,8 +31,6 @@ module ActiveRecord def extract_default if blob_or_text_column? @default = null || strict ? nil : '' - elsif missing_default_forged_as_empty_string?(default) - @default = nil end end @@ -59,17 +57,6 @@ module ActiveRecord private - # MySQL misreports NOT NULL column default when none is given. - # We can't detect this for columns which may have a legitimate '' - # default (string) but we can for others (integer, datetime, boolean, - # and the rest). - # - # Test whether the column has default '', is not null, and is not - # a type allowing default ''. - def missing_default_forged_as_empty_string?(default) - type != :string && !null && default == '' - end - def assert_valid_default(default) if blob_or_text_column? && default.present? raise ArgumentError, "#{type} columns cannot have a default value: #{default.inspect}" diff --git a/activerecord/lib/active_record/relation/finder_methods.rb b/activerecord/lib/active_record/relation/finder_methods.rb index 19244bcf95..3cbb12a09d 100644 --- a/activerecord/lib/active_record/relation/finder_methods.rb +++ b/activerecord/lib/active_record/relation/finder_methods.rb @@ -117,9 +117,9 @@ module ActiveRecord # def first(limit = nil) if limit - find_nth_with_limit(offset_index, limit) + find_nth_with_limit_and_offset(0, limit, offset: offset_index) else - find_nth(0, offset_index) + find_nth 0 end end @@ -169,7 +169,7 @@ module ActiveRecord # Person.offset(3).second # returns the second object from OFFSET 3 (which is OFFSET 4) # Person.where(["user_name = :u", { u: user_name }]).second def second - find_nth(1, offset_index) + find_nth 1 end # Same as #second but raises ActiveRecord::RecordNotFound if no record @@ -185,7 +185,7 @@ module ActiveRecord # Person.offset(3).third # returns the third object from OFFSET 3 (which is OFFSET 5) # Person.where(["user_name = :u", { u: user_name }]).third def third - find_nth(2, offset_index) + find_nth 2 end # Same as #third but raises ActiveRecord::RecordNotFound if no record @@ -201,7 +201,7 @@ module ActiveRecord # Person.offset(3).fourth # returns the fourth object from OFFSET 3 (which is OFFSET 6) # Person.where(["user_name = :u", { u: user_name }]).fourth def fourth - find_nth(3, offset_index) + find_nth 3 end # Same as #fourth but raises ActiveRecord::RecordNotFound if no record @@ -217,7 +217,7 @@ module ActiveRecord # Person.offset(3).fifth # returns the fifth object from OFFSET 3 (which is OFFSET 7) # Person.where(["user_name = :u", { u: user_name }]).fifth def fifth - find_nth(4, offset_index) + find_nth 4 end # Same as #fifth but raises ActiveRecord::RecordNotFound if no record @@ -233,7 +233,7 @@ module ActiveRecord # Person.offset(3).forty_two # returns the forty-second object from OFFSET 3 (which is OFFSET 44) # Person.where(["user_name = :u", { u: user_name }]).forty_two def forty_two - find_nth(41, offset_index) + find_nth 41 end # Same as #forty_two but raises ActiveRecord::RecordNotFound if no record @@ -488,27 +488,39 @@ module ActiveRecord end end - def find_nth(index, offset) + def find_nth(index, offset = nil) if loaded? @records[index] else - offset += index - @offsets[offset] ||= find_nth_with_limit(offset, 1).first + # TODO: once the offset argument is removed we rely on offset_index + # within find_nth_with_limit, rather than pass it in via + # find_nth_with_limit_and_offset + if offset + ActiveSupport::Deprecation.warn(<<-MSG.squish) + Passing an offset argument to find_nth is deprecated, + please use Relation#offset instead. + MSG + else + offset = offset_index + end + @offsets[offset + index] ||= find_nth_with_limit_and_offset(index, 1, offset: offset).first end end def find_nth!(index) - find_nth(index, offset_index) or raise RecordNotFound.new("Couldn't find #{@klass.name} with [#{arel.where_sql(@klass.arel_engine)}]") + find_nth(index) or raise RecordNotFound.new("Couldn't find #{@klass.name} with [#{arel.where_sql(@klass.arel_engine)}]") end - def find_nth_with_limit(offset, limit) + def find_nth_with_limit(index, limit) + # TODO: once the offset argument is removed from find_nth, + # find_nth_with_limit_and_offset can be merged into this method relation = if order_values.empty? && primary_key order(arel_table[primary_key].asc) else self end - relation = relation.offset(offset) unless offset.zero? + relation = relation.offset(index) unless index.zero? relation.limit(limit).to_a end @@ -524,5 +536,16 @@ module ActiveRecord end end end + + private + + def find_nth_with_limit_and_offset(index, limit, offset:) # :nodoc: + if loaded? + @records[index, limit] + else + index += offset + find_nth_with_limit(index, limit) + end + end end end diff --git a/activerecord/test/cases/base_test.rb b/activerecord/test/cases/base_test.rb index f343a15317..ba3e16bdb2 100644 --- a/activerecord/test/cases/base_test.rb +++ b/activerecord/test/cases/base_test.rb @@ -1252,6 +1252,7 @@ class BasicsTest < ActiveRecord::TestCase original_logger = ActiveRecord::Base.logger log = StringIO.new ActiveRecord::Base.logger = ActiveSupport::Logger.new(log) + ActiveRecord::Base.logger.level = Logger::DEBUG ActiveRecord::Base.benchmark("Logging", :level => :debug, :silence => false) { ActiveRecord::Base.logger.debug "Quiet" } assert_match(/Quiet/, log.string) ensure diff --git a/activerecord/test/cases/column_definition_test.rb b/activerecord/test/cases/column_definition_test.rb index da0d7f5195..783a374116 100644 --- a/activerecord/test/cases/column_definition_test.rb +++ b/activerecord/test/cases/column_definition_test.rb @@ -49,6 +49,16 @@ module ActiveRecord assert_equal "a", varbinary_column.default end + def test_should_be_empty_string_default_for_mysql_binary_data_types + type = SqlTypeMetadata.new(type: :binary, sql_type: "binary(1)") + binary_column = AbstractMysqlAdapter::Column.new("title", "", type, false) + assert_equal "", binary_column.default + + type = SqlTypeMetadata.new(type: :binary, sql_type: "varbinary") + varbinary_column = AbstractMysqlAdapter::Column.new("title", "", type, false) + assert_equal "", varbinary_column.default + end + def test_should_not_set_default_for_blob_and_text_data_types assert_raise ArgumentError do AbstractMysqlAdapter::Column.new("title", "a", SqlTypeMetadata.new(sql_type: "blob")) diff --git a/activerecord/test/cases/invalid_connection_test.rb b/activerecord/test/cases/invalid_connection_test.rb index c26623e3ca..a16b52751a 100644 --- a/activerecord/test/cases/invalid_connection_test.rb +++ b/activerecord/test/cases/invalid_connection_test.rb @@ -1,5 +1,6 @@ require "cases/helper" +if current_adapter?(:Mysql2Adapter) class TestAdapterWithInvalidConnection < ActiveRecord::TestCase self.use_transactional_tests = false @@ -20,3 +21,4 @@ class TestAdapterWithInvalidConnection < ActiveRecord::TestCase assert_equal "#{Bird.name} (call '#{Bird.name}.connection' to establish a connection)", Bird.inspect end end +end diff --git a/activerecord/test/cases/relations_test.rb b/activerecord/test/cases/relations_test.rb index 7149c7d072..0638edacbd 100644 --- a/activerecord/test/cases/relations_test.rb +++ b/activerecord/test/cases/relations_test.rb @@ -111,15 +111,38 @@ class RelationTest < ActiveRecord::TestCase def test_loaded_first topics = Topic.all.order('id ASC') + topics.to_a # force load - assert_queries(1) do - topics.to_a # force load - 2.times { assert_equal "The First Topic", topics.first.title } + assert_no_queries do + assert_equal "The First Topic", topics.first.title end assert topics.loaded? end + def test_loaded_first_with_limit + topics = Topic.all.order('id ASC') + topics.to_a # force load + + assert_no_queries do + assert_equal ["The First Topic", + "The Second Topic of the day"], topics.first(2).map(&:title) + end + + assert topics.loaded? + end + + def test_first_get_more_than_available + topics = Topic.all.order('id ASC') + unloaded_first = topics.first(10) + topics.to_a # force load + + assert_no_queries do + loaded_first = topics.first(10) + assert_equal unloaded_first, loaded_first + end + end + def test_reload topics = Topic.all |