Fix bin/rails db:forward first migration

Author: bogdanvlviv

activerecord/CHANGELOG.md

@@ -1,3 +1,7 @@
+*   Fix `bin/rails db:forward` first migration.
+
+    *bogdanvlviv*
+
 *   Support Descending Indexes for MySQL.
 
     MySQL 8.0.1 and higher supports descending indexes: `DESC` in an index definition is no longer ignored.

activerecord/lib/active_record/migration.rb

@@ -1104,7 +1104,13 @@ def migration_files(paths)
 
       def move(direction, migrations_paths, steps)
         migrator = new(direction, migrations(migrations_paths))
-        start_index = migrator.migrations.index(migrator.current_migration)
+
+        start_index =
+          if current_version == 0
+            0
+          else
+            migrator.migrations.index(migrator.current_migration)
+          end
 
         if start_index
           finish = migrator.migrations[start_index + steps]

railties/test/application/rake/migrations_test.rb

@@ -142,6 +142,31 @@ class AMigration < ActiveRecord::Migration::Current
         end
       end
 
+      test "migration status after rollback and forward" do
+        Dir.chdir(app_path) do
+          `bin/rails generate model user username:string password:string;
+           bin/rails generate migration add_email_to_users email:string;
+           bin/rails db:migrate`
+
+          output = `bin/rails db:migrate:status`
+
+          assert_match(/up\s+\d{14}\s+Create users/, output)
+          assert_match(/up\s+\d{14}\s+Add email to users/, output)
+
+          `bin/rails db:rollback STEP=2`
+          output = `bin/rails db:migrate:status`
+
+          assert_match(/down\s+\d{14}\s+Create users/, output)
+          assert_match(/down\s+\d{14}\s+Add email to users/, output)
+
+          `bin/rails db:forward STEP=2`
+          output = `bin/rails db:migrate:status`
+
+          assert_match(/up\s+\d{14}\s+Create users/, output)
+          assert_match(/up\s+\d{14}\s+Add email to users/, output)
+        end
+      end
+
       test "migration status after rollback and redo without timestamps" do
         add_to_config("config.active_record.timestamped_migrations = false")