Fixed automatic maintaining test schema to properly handle sql structure schema format.

Additionally:
* It changes `purge` task on `sqlite3` adapter to recreate database file, to
be consistent with other adapters.
* Adds `purge` step when loading from `schema.rb`

3 files changed, 12 insertions, 1 deletions

diff --git a/activerecord/CHANGELOG.md b/activerecord/CHANGELOG.md
index 078d63f8f2..9a5d27ef92 100644
--- a/activerecord/CHANGELOG.md
+++ b/activerecord/CHANGELOG.md
@@ -1,3 +1,8 @@
+*   Fixed automatic maintaining test schema to properly handle sql structure
+    schema format. Fixes #15394.
+
+    *Wojciech Wnętrzak*
+
 *   PostgreSQL support default values for enum types. Fixes #7814.
 
     *Yves Senn*
diff --git a/activerecord/lib/active_record/tasks/database_tasks.rb b/activerecord/lib/active_record/tasks/database_tasks.rb
index 168b338b97..dedbbd3585 100644
--- a/activerecord/lib/active_record/tasks/database_tasks.rb
+++ b/activerecord/lib/active_record/tasks/database_tasks.rb
@@ -161,10 +161,12 @@ module ActiveRecord
         when :ruby
           file ||= File.join(db_dir, "schema.rb")
           check_schema_file(file)
+          purge(current_config)
           load(file)
         when :sql
           file ||= File.join(db_dir, "structure.sql")
           check_schema_file(file)
+          purge(current_config)
           structure_load(current_config, file)
         else
           raise ArgumentError, "unknown format #{format.inspect}"
diff --git a/activerecord/lib/active_record/tasks/sqlite_database_tasks.rb b/activerecord/lib/active_record/tasks/sqlite_database_tasks.rb
index 5688931db2..9ab64d0325 100644
--- a/activerecord/lib/active_record/tasks/sqlite_database_tasks.rb
+++ b/activerecord/lib/active_record/tasks/sqlite_database_tasks.rb
@@ -21,7 +21,11 @@ module ActiveRecord
 
         FileUtils.rm(file) if File.exist?(file)
       end
-      alias :purge :drop
+
+      def purge
+        drop
+        create
+      end
 
       def charset
         connection.encoding