diff options
| -rw-r--r-- | activerecord/CHANGELOG.md | 31 | ||||
| -rw-r--r-- | activerecord/lib/active_record/querying.rb | 1 | ||||
| -rw-r--r-- | activerecord/lib/active_record/relation.rb | 4 | ||||
| -rw-r--r-- | activerecord/lib/active_record/relation/finder_methods.rb | 94 | ||||
| -rw-r--r-- | activerecord/test/cases/base_test.rb | 2 | ||||
| -rw-r--r-- | activerecord/test/cases/calculations_test.rb | 18 | ||||
| -rw-r--r-- | activerecord/test/cases/finder_test.rb | 90 | ||||
| -rw-r--r-- | activerecord/test/cases/relations_test.rb | 24 | ||||
| -rw-r--r-- | activerecord/test/cases/scoping/named_scoping_test.rb | 8 | ||||
| -rw-r--r-- | activerecord/test/fixtures/topics.yml | 7 |
10 files changed, 245 insertions, 34 deletions
diff --git a/activerecord/CHANGELOG.md b/activerecord/CHANGELOG.md index 304c48bf44..170818cd1c 100644 --- a/activerecord/CHANGELOG.md +++ b/activerecord/CHANGELOG.md @@ -1,3 +1,34 @@ +* Ensure `second` through `fifth` methods act like the `first` finder. + + The famous ordinal Array instance methods defined in ActiveSupport + (`first`, `second`, `third`, `fourth`, and `fifth`) are now available as + full-fledged finders in ActiveRecord. The biggest benefit of this is ordering + of the records returned now defaults to the table's primary key in ascending order. + + Example: + + User.all.second + + # Before + # => 'SELECT "users".* FROM "users"' + + # After + # => SELECT "users".* FROM "users" ORDER BY "users"."id" ASC LIMIT 1 OFFSET 1' + + User.offset(3).second + + # Before + # => 'SELECT "users".* FROM "users" LIMIT -1 OFFSET 3' # sqlite3 gem + # => 'SELECT "users".* FROM "users" OFFSET 3' # pg gem + # => 'SELECT `users`.* FROM `users` LIMIT 18446744073709551615 OFFSET 3' # mysql2 gem + + # After + # => SELECT "users".* FROM "users" ORDER BY "users"."id" ASC LIMIT 1 OFFSET 4' + + Fixes #13743. + + *Jason Meller* + * ActiveRecord states are now correctly restored after a rollback for models that did not define any transactional callbacks (i.e. `after_commit`, `after_rollback` or `after_create`). diff --git a/activerecord/lib/active_record/querying.rb b/activerecord/lib/active_record/querying.rb index fd4c973504..ef138c6f80 100644 --- a/activerecord/lib/active_record/querying.rb +++ b/activerecord/lib/active_record/querying.rb @@ -1,6 +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 :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 diff --git a/activerecord/lib/active_record/relation.rb b/activerecord/lib/active_record/relation.rb index 745c6cf349..f152891888 100644 --- a/activerecord/lib/active_record/relation.rb +++ b/activerecord/lib/active_record/relation.rb @@ -20,10 +20,11 @@ module ActiveRecord alias :model :klass alias :loaded? :loaded - def initialize(klass, table, values = {}) + def initialize(klass, table, values = {}, offsets = {}) @klass = klass @table = table @values = values + @offsets = offsets @loaded = false end @@ -498,6 +499,7 @@ module ActiveRecord @first = @last = @to_sql = @order_clause = @scope_for_create = @arel = @loaded = nil @should_eager_load = @join_dependency = nil @records = [] + @offsets = {} self end diff --git a/activerecord/lib/active_record/relation/finder_methods.rb b/activerecord/lib/active_record/relation/finder_methods.rb index 4984dbd277..f2ac351a8b 100644 --- a/activerecord/lib/active_record/relation/finder_methods.rb +++ b/activerecord/lib/active_record/relation/finder_methods.rb @@ -127,9 +127,9 @@ module ActiveRecord # def first(limit = nil) if limit - find_first_with_limit(limit) + find_nth_with_limit(offset_value, limit) else - find_first + find_nth(offset_value) end end @@ -172,6 +172,86 @@ module ActiveRecord last or raise RecordNotFound end + # Find the second record. + # If no order is defined it will order by primary key. + # + # Person.second # returns the second object fetched by SELECT * FROM people + # 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(offset_value ? offset_value + 1 : 1) + end + + # Same as +second+ but raises <tt>ActiveRecord::RecordNotFound</tt> if no record + # is found. + def second! + second or raise RecordNotFound + end + + # Find the third record. + # If no order is defined it will order by primary key. + # + # Person.third # returns the third object fetched by SELECT * FROM people + # 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(offset_value ? offset_value + 2 : 2) + end + + # Same as +third+ but raises <tt>ActiveRecord::RecordNotFound</tt> if no record + # is found. + def third! + third or raise RecordNotFound + end + + # Find the fourth record. + # If no order is defined it will order by primary key. + # + # Person.fourth # returns the fourth object fetched by SELECT * FROM people + # 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(offset_value ? offset_value + 3 : 3) + end + + # Same as +fourth+ but raises <tt>ActiveRecord::RecordNotFound</tt> if no record + # is found. + def fourth! + fourth or raise RecordNotFound + end + + # Find the fifth record. + # If no order is defined it will order by primary key. + # + # Person.fifth # returns the fifth object fetched by SELECT * FROM people + # 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(offset_value ? offset_value + 4 : 4) + end + + # Same as +fifth+ but raises <tt>ActiveRecord::RecordNotFound</tt> if no record + # is found. + def fifth! + fifth or raise RecordNotFound + end + + # Find the forty-second record. Also known as accessing "the reddit". + # If no order is defined it will order by primary key. + # + # Person.forty_two # returns the forty-second object fetched by SELECT * FROM people + # Person.offset(3).forty_two # returns the fifth object from OFFSET 3 (which is OFFSET 44) + # Person.where(["user_name = :u", { u: user_name }]).forty_two + def forty_two + find_nth(offset_value ? offset_value + 41 : 41) + end + + # Same as +forty_two+ but raises <tt>ActiveRecord::RecordNotFound</tt> if no record + # is found. + def forty_two! + forty_two or raise RecordNotFound + 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: # @@ -364,19 +444,19 @@ module ActiveRecord end end - def find_first + def find_nth(offset) if loaded? @records.first else - @first ||= find_first_with_limit(1).first + @offsets[offset] ||= find_nth_with_limit(offset, 1).first end end - def find_first_with_limit(limit) + def find_nth_with_limit(offset, limit) if order_values.empty? && primary_key - order(arel_table[primary_key].asc).limit(limit).to_a + order(arel_table[primary_key].asc).limit(limit).offset(offset).to_a else - limit(limit).to_a + limit(limit).offset(offset).to_a end end diff --git a/activerecord/test/cases/base_test.rb b/activerecord/test/cases/base_test.rb index ef1ebbb400..8a0b0b9589 100644 --- a/activerecord/test/cases/base_test.rb +++ b/activerecord/test/cases/base_test.rb @@ -321,7 +321,7 @@ class BasicsTest < ActiveRecord::TestCase def test_load topics = Topic.all.merge!(:order => 'id').to_a - assert_equal(4, topics.size) + assert_equal(5, topics.size) assert_equal(topics(:first).title, topics.first.title) end diff --git a/activerecord/test/cases/calculations_test.rb b/activerecord/test/cases/calculations_test.rb index 2f6913167d..0bc81ffe56 100644 --- a/activerecord/test/cases/calculations_test.rb +++ b/activerecord/test/cases/calculations_test.rb @@ -466,14 +466,14 @@ class CalculationsTest < ActiveRecord::TestCase def test_distinct_is_honored_when_used_with_count_operation_after_group # Count the number of authors for approved topics approved_topics_count = Topic.group(:approved).count(:author_name)[true] - assert_equal approved_topics_count, 3 + assert_equal approved_topics_count, 4 # Count the number of distinct authors for approved Topics distinct_authors_for_approved_count = Topic.group(:approved).distinct.count(:author_name)[true] - assert_equal distinct_authors_for_approved_count, 2 + assert_equal distinct_authors_for_approved_count, 3 end def test_pluck - assert_equal [1,2,3,4], Topic.order(:id).pluck(:id) + assert_equal [1,2,3,4,5], Topic.order(:id).pluck(:id) end def test_pluck_without_column_names @@ -509,7 +509,7 @@ class CalculationsTest < ActiveRecord::TestCase end def test_pluck_with_qualified_column_name - assert_equal [1,2,3,4], Topic.order(:id).pluck("topics.id") + assert_equal [1,2,3,4,5], Topic.order(:id).pluck("topics.id") end def test_pluck_auto_table_name_prefix @@ -557,11 +557,13 @@ class CalculationsTest < ActiveRecord::TestCase def test_pluck_multiple_columns assert_equal [ [1, "The First Topic"], [2, "The Second Topic of the day"], - [3, "The Third Topic of the day"], [4, "The Fourth Topic of the day"] + [3, "The Third Topic of the day"], [4, "The Fourth Topic of the day"], + [5, "The Fifth Topic of the day"] ], Topic.order(:id).pluck(:id, :title) assert_equal [ [1, "The First Topic", "David"], [2, "The Second Topic of the day", "Mary"], - [3, "The Third Topic of the day", "Carl"], [4, "The Fourth Topic of the day", "Carl"] + [3, "The Third Topic of the day", "Carl"], [4, "The Fourth Topic of the day", "Carl"], + [5, "The Fifth Topic of the day", "Jason"] ], Topic.order(:id).pluck(:id, :title, :author_name) end @@ -587,7 +589,7 @@ class CalculationsTest < ActiveRecord::TestCase def test_pluck_replaces_select_clause taks_relation = Topic.select(:approved, :id).order(:id) - assert_equal [1,2,3,4], taks_relation.pluck(:id) - assert_equal [false, true, true, true], taks_relation.pluck(:approved) + assert_equal [1,2,3,4,5], taks_relation.pluck(:id) + assert_equal [false, true, true, true, true], taks_relation.pluck(:approved) end end diff --git a/activerecord/test/cases/finder_test.rb b/activerecord/test/cases/finder_test.rb index 9b575557de..9cd1e0ace8 100644 --- a/activerecord/test/cases/finder_test.rb +++ b/activerecord/test/cases/finder_test.rb @@ -254,6 +254,94 @@ class FinderTest < ActiveRecord::TestCase end end + def test_second + assert_equal topics(:second).title, Topic.second.title + end + + def test_second_with_offset + assert_equal topics(:fifth), Topic.offset(3).second + end + + def test_second_have_primary_key_order_by_default + expected = topics(:second) + expected.touch # PostgreSQL changes the default order if no order clause is used + assert_equal expected, Topic.second + end + + def test_model_class_responds_to_second_bang + assert Topic.second! + Topic.delete_all + assert_raises ActiveRecord::RecordNotFound do + Topic.second! + end + end + + def test_third + assert_equal topics(:third).title, Topic.third.title + end + + def test_third_with_offset + assert_equal topics(:fifth), Topic.offset(2).third + end + + def test_third_have_primary_key_order_by_default + expected = topics(:third) + expected.touch # PostgreSQL changes the default order if no order clause is used + assert_equal expected, Topic.third + end + + def test_model_class_responds_to_third_bang + assert Topic.third! + Topic.delete_all + assert_raises ActiveRecord::RecordNotFound do + Topic.third! + end + end + + def test_fourth + assert_equal topics(:fourth).title, Topic.fourth.title + end + + def test_fourth_with_offset + assert_equal topics(:fifth), Topic.offset(1).fourth + end + + def test_fourth_have_primary_key_order_by_default + expected = topics(:fourth) + expected.touch # PostgreSQL changes the default order if no order clause is used + assert_equal expected, Topic.fourth + end + + def test_model_class_responds_to_fourth_bang + assert Topic.fourth! + Topic.delete_all + assert_raises ActiveRecord::RecordNotFound do + Topic.fourth! + end + end + + def test_fifth + assert_equal topics(:fifth).title, Topic.fifth.title + end + + def test_fifth_with_offset + assert_equal topics(:fifth), Topic.offset(0).fifth + end + + def test_fifth_have_primary_key_order_by_default + expected = topics(:fifth) + expected.touch # PostgreSQL changes the default order if no order clause is used + assert_equal expected, Topic.fifth + end + + def test_model_class_responds_to_fifth_bang + assert Topic.fifth! + Topic.delete_all + assert_raises ActiveRecord::RecordNotFound do + Topic.fifth! + end + end + def test_last_bang_present assert_nothing_raised do assert_equal topics(:second), Topic.where("title = 'The Second Topic of the day'").last! @@ -267,7 +355,7 @@ class FinderTest < ActiveRecord::TestCase end def test_model_class_responds_to_last_bang - assert_equal topics(:fourth), Topic.last! + assert_equal topics(:fifth), Topic.last! assert_raises ActiveRecord::RecordNotFound do Topic.delete_all Topic.last! diff --git a/activerecord/test/cases/relations_test.rb b/activerecord/test/cases/relations_test.rb index afd5a69cef..9227c2b72f 100644 --- a/activerecord/test/cases/relations_test.rb +++ b/activerecord/test/cases/relations_test.rb @@ -65,7 +65,7 @@ class RelationTest < ActiveRecord::TestCase def test_scoped topics = Topic.all assert_kind_of ActiveRecord::Relation, topics - assert_equal 4, topics.size + assert_equal 5, topics.size end def test_to_json @@ -86,14 +86,14 @@ class RelationTest < ActiveRecord::TestCase def test_scoped_all topics = Topic.all.to_a assert_kind_of Array, topics - assert_no_queries { assert_equal 4, topics.size } + assert_no_queries { assert_equal 5, topics.size } end def test_loaded_all topics = Topic.all assert_queries(1) do - 2.times { assert_equal 4, topics.to_a.size } + 2.times { assert_equal 5, topics.to_a.size } end assert topics.loaded? @@ -164,27 +164,27 @@ class RelationTest < ActiveRecord::TestCase def test_finding_with_order topics = Topic.order('id') - assert_equal 4, topics.to_a.size + assert_equal 5, topics.to_a.size assert_equal topics(:first).title, topics.first.title end def test_finding_with_arel_order topics = Topic.order(Topic.arel_table[:id].asc) - assert_equal 4, topics.to_a.size + assert_equal 5, topics.to_a.size assert_equal topics(:first).title, topics.first.title end def test_finding_with_assoc_order topics = Topic.order(:id => :desc) - assert_equal 4, topics.to_a.size - assert_equal topics(:fourth).title, topics.first.title + assert_equal 5, topics.to_a.size + assert_equal topics(:fifth).title, topics.first.title end def test_finding_with_reverted_assoc_order topics = Topic.order(:id => :asc).reverse_order - assert_equal 4, topics.to_a.size - assert_equal topics(:fourth).title, topics.first.title + assert_equal 5, topics.to_a.size + assert_equal topics(:fifth).title, topics.first.title end def test_order_with_hash_and_symbol_generates_the_same_sql @@ -197,19 +197,19 @@ class RelationTest < ActiveRecord::TestCase def test_finding_last_with_arel_order topics = Topic.order(Topic.arel_table[:id].asc) - assert_equal topics(:fourth).title, topics.last.title + assert_equal topics(:fifth).title, topics.last.title end def test_finding_with_order_concatenated topics = Topic.order('author_name').order('title') - assert_equal 4, topics.to_a.size + assert_equal 5, topics.to_a.size assert_equal topics(:fourth).title, topics.first.title end def test_finding_with_reorder topics = Topic.order('author_name').order('title').reorder('id').to_a topics_titles = topics.map{ |t| t.title } - assert_equal ['The First Topic', 'The Second Topic of the day', 'The Third Topic of the day', 'The Fourth Topic of the day'], topics_titles + assert_equal ['The First Topic', 'The Second Topic of the day', 'The Third Topic of the day', 'The Fourth Topic of the day', 'The Fifth Topic of the day'], topics_titles end def test_finding_with_order_and_take diff --git a/activerecord/test/cases/scoping/named_scoping_test.rb b/activerecord/test/cases/scoping/named_scoping_test.rb index 72c9787b84..086977d9a2 100644 --- a/activerecord/test/cases/scoping/named_scoping_test.rb +++ b/activerecord/test/cases/scoping/named_scoping_test.rb @@ -344,13 +344,13 @@ class NamedScopingTest < ActiveRecord::TestCase end def test_scopes_batch_finders - assert_equal 3, Topic.approved.count + assert_equal 4, Topic.approved.count - assert_queries(4) do + assert_queries(5) do Topic.approved.find_each(:batch_size => 1) {|t| assert t.approved? } end - assert_queries(2) do + assert_queries(3) do Topic.approved.find_in_batches(:batch_size => 2) do |group| group.each {|t| assert t.approved? } end @@ -366,7 +366,7 @@ class NamedScopingTest < ActiveRecord::TestCase def test_scopes_on_relations # Topic.replied approved_topics = Topic.all.approved.order('id DESC') - assert_equal topics(:fourth), approved_topics.first + assert_equal topics(:fifth), approved_topics.first replied_approved_topics = approved_topics.replied assert_equal topics(:third), replied_approved_topics.first diff --git a/activerecord/test/fixtures/topics.yml b/activerecord/test/fixtures/topics.yml index 2b042bd135..bf049abbf1 100644 --- a/activerecord/test/fixtures/topics.yml +++ b/activerecord/test/fixtures/topics.yml @@ -40,3 +40,10 @@ fourth: type: Reply parent_id: 3 +fifth: + id: 5 + title: The Fifth Topic of the day + author_name: Jason + written_on: 2013-07-13t12:11:00.0099+01:00 + content: Omakase + approved: true |