fix: create core schema before making a first select request

Migration uses Finder to get the current table version.

winixd/core/app.cpp

@@ -287,6 +287,8 @@ bool App::DoDatabaseMigration()
 	Item item;
 	Group group;
 
+	migration.set_connector(model_connector);
+	migration.create_winix_schema();
 	ok = ok && Migration::do_migration(&model_connector, migration);
 	ok = ok && Migration::do_migration(&model_connector, user);
 

winixd/models/migration.cpp

@@ -103,29 +103,25 @@ bool Migration::do_migration(int & current_table_version)
 	bool ok = true;
 
 	ok = ok && morm::Model::do_migration(current_table_version, 1, this, &Migration::do_migration_to_1);
-	ok = ok && morm::Model::do_migration(current_table_version, 2, this, &Migration::do_migration_to_2);
 
 	return ok;
 }
 
 
-bool Migration::do_migration_to_1()
+bool Migration::create_winix_schema()
 {
+	// may the name of a schema (core) should be a parameter in the config?
+
 	const char * str = R"sql(
-		create schema core
+		create schema if not exists core
-		);
 	)sql";
 
 	return db_query(str);
 }
 
 
-bool Migration::do_migration_to_2()
+bool Migration::do_migration_to_1()
 {
-	// IMPROVEME
-	// what about 'create schema core'?
-	// may the name of a schema (core) should be a parameter in the config?
-
 	const char * str = R"sql(
 		create table core.migration (
 		id serial,

winixd/models/migration.h

@@ -78,13 +78,12 @@ public:
 	static bool do_migration(morm::ModelConnector * model_connector, morm::Model & model);
 
 
+	bool create_winix_schema();
 	bool do_migration(int & current_table_version);
 
 private:
 
-
 	bool do_migration_to_1();
-	bool do_migration_to_2();
 
 };