chore: introduce constants for db dialects

chore: go fmt

config/config.go

@@ -22,6 +22,10 @@ const (
 	defaultConfigPath          = "config.yml"
 	defaultConfigPathLegacy    = "config.ini"
 	defaultEnvConfigPathLegacy = ".env"
+
+	SQLDialectMysql    = "mysql"
+	SQLDialectPostgres = "postgres"
+	SQLDialectSqlite   = "sqlite3"
 )
 
 var (
@@ -113,16 +117,16 @@ func (c *Config) GetFixturesFunc(dbDialect string) models.MigrationFunc {
 
 func (c *dbConfig) GetDialector() gorm.Dialector {
 	switch c.Dialect {
-	case "mysql":
+	case SQLDialectMysql:
 		return mysql.New(mysql.Config{
 			DriverName: c.Dialect,
 			DSN:        mysqlConnectionString(c),
 		})
-	case "postgres":
+	case SQLDialectPostgres:
 		return postgres.New(postgres.Config{
 			DSN: postgresConnectionString(c),
 		})
-	case "sqlite3":
+	case SQLDialectSqlite:
 		return sqlite.Open(sqliteConnectionString(c))
 	}
 	return nil

config/legacy.go

@@ -59,7 +59,7 @@ func migrateLegacyConfig() error {
 	}
 
 	if dbType == "" {
-		dbType = "sqlite3"
+		dbType = SQLDialectSqlite
 	}
 
 	dbMaxConn := cfg.Section("database").Key("max_connections").MustUint(2)

migrations/common/custom_pre.go

@@ -38,7 +38,7 @@ func init() {
 				migrator := db.Migrator()
 				const lookupKey = "20201106-migration_cascade_constraints"
 
-				if cfg.Db.Dialect == "sqlite3" {
+				if cfg.Db.Dialect == config.SQLDialectSqlite {
 					// https://stackoverflow.com/a/1884893/3112139
 					// unfortunately, we can't migrate existing sqlite databases to the newly introduced cascade settings
 					// things like deleting all summaries won't work in those cases unless an entirely new db is created
@@ -52,7 +52,7 @@ func init() {
 				}
 
 				condition := "key = ?"
-				if cfg.Db.Dialect == "mysql" {
+				if cfg.Db.Dialect == config.SQLDialectMysql {
 					condition = "`key` = ?"
 				}
 				lookupResult := db.Where(condition, lookupKey).First(&models.KeyStringValue{})