fix: enable experimental column altering for cockroachdb (see #442)

config/db_opts.go

@@ -0,0 +1,35 @@
+package config
+
+import (
+	"gorm.io/gorm"
+)
+
+type WakapiDBOpts struct {
+	dbConfig *dbConfig
+}
+
+func GetWakapiDBOpts(dbConfig *dbConfig) *WakapiDBOpts {
+	return &WakapiDBOpts{dbConfig: dbConfig}
+}
+
+func (opts WakapiDBOpts) Apply(config *gorm.Config) error {
+	return nil
+}
+
+func (opts WakapiDBOpts) AfterInitialize(db *gorm.DB) error {
+	// initial session variables
+	if opts.dbConfig.Type == "cockroach" {
+		// https://www.cockroachlabs.com/docs/stable/experimental-features.html#alter-column-types
+		if err := db.Exec("SET enable_experimental_alter_column_type_general = true;").Error; err != nil {
+			return err
+		}
+	}
+
+	if opts.dbConfig.IsSQLite() {
+		if err := db.Exec("PRAGMA foreign_keys = ON;").Error; err != nil {
+			return err
+		}
+	}
+
+	return nil
+}