fix: enhance migrateTokenModelLimitsToText function to return errors and improve migration checks

model/main.go

@@ -251,7 +251,9 @@ func migrateDB() error {
 	// Migrate price_amount column from float/double to decimal for existing tables
 	migrateSubscriptionPlanPriceAmount()
 	// Migrate model_limits column from varchar to text for existing tables
-	migrateTokenModelLimitsToText()
+	if err := migrateTokenModelLimitsToText(); err != nil {
+		return err
+	}
 
 	err := DB.AutoMigrate(
 		&Channel{},
@@ -449,52 +451,55 @@ PRIMARY KEY (` + "`id`" + `)
 
 // migrateTokenModelLimitsToText migrates model_limits column from varchar(1024) to text
 // This is safe to run multiple times - it checks the column type first
-func migrateTokenModelLimitsToText() {
+func migrateTokenModelLimitsToText() error {
 	// SQLite uses type affinity, so TEXT and VARCHAR are effectively the same — no migration needed
 	if common.UsingSQLite {
-		return
+		return nil
 	}
 
 	tableName := "tokens"
 	columnName := "model_limits"
 
 	if !DB.Migrator().HasTable(tableName) {
-		return
+		return nil
 	}
 
 	if !DB.Migrator().HasColumn(&Token{}, columnName) {
-		return
+		return nil
 	}
 
 	var alterSQL string
 	if common.UsingPostgreSQL {
 		var dataType string
-		DB.Raw(`SELECT data_type FROM information_schema.columns
-			WHERE table_name = ? AND column_name = ?`, tableName, columnName).Scan(&dataType)
-		if dataType == "text" {
-			return
+		if err := DB.Raw(`SELECT data_type FROM information_schema.columns
+			WHERE table_schema = current_schema() AND table_name = ? AND column_name = ?`,
+			tableName, columnName).Scan(&dataType).Error; err != nil {
+			common.SysLog(fmt.Sprintf("Warning: failed to query metadata for %s.%s: %v", tableName, columnName, err))
+		} else if dataType == "text" {
+			return nil
 		}
 		alterSQL = fmt.Sprintf(`ALTER TABLE %s ALTER COLUMN %s TYPE text`, tableName, columnName)
 	} else if common.UsingMySQL {
 		var columnType string
-		DB.Raw(`SELECT COLUMN_TYPE FROM information_schema.columns
-			WHERE table_schema = DATABASE() AND table_name = ? AND column_name = ?`,
-			tableName, columnName).Scan(&columnType)
-		if strings.ToLower(columnType) == "text" {
-			return
+		if err := DB.Raw(`SELECT COLUMN_TYPE FROM information_schema.columns
+				WHERE table_schema = DATABASE() AND table_name = ? AND column_name = ?`,
+			tableName, columnName).Scan(&columnType).Error; err != nil {
+			common.SysLog(fmt.Sprintf("Warning: failed to query metadata for %s.%s: %v", tableName, columnName, err))
+		} else if strings.ToLower(columnType) == "text" {
+			return nil
 		}
 		alterSQL = fmt.Sprintf("ALTER TABLE %s MODIFY COLUMN %s text", tableName, columnName)
 	} else {
-		return
+		return nil
 	}
 
 	if alterSQL != "" {
 		if err := DB.Exec(alterSQL).Error; err != nil {
-			common.SysLog(fmt.Sprintf("Warning: failed to migrate %s.%s to text: %v", tableName, columnName, err))
-		} else {
-			common.SysLog(fmt.Sprintf("Successfully migrated %s.%s to text", tableName, columnName))
+			return fmt.Errorf("failed to migrate %s.%s to text: %w", tableName, columnName, err)
 		}
+		common.SysLog(fmt.Sprintf("Successfully migrated %s.%s to text", tableName, columnName))
 	}
+	return nil
 }
 
 // migrateSubscriptionPlanPriceAmount migrates price_amount column from float/double to decimal(10,6)
@@ -523,9 +528,11 @@ func migrateSubscriptionPlanPriceAmount() {
 	if common.UsingPostgreSQL {
 		// PostgreSQL: Check if already decimal/numeric
 		var dataType string
-		DB.Raw(`SELECT data_type FROM information_schema.columns 
-			WHERE table_name = ? AND column_name = ?`, tableName, columnName).Scan(&dataType)
-		if dataType == "numeric" {
+		if err := DB.Raw(`SELECT data_type FROM information_schema.columns
+			WHERE table_schema = current_schema() AND table_name = ? AND column_name = ?`,
+			tableName, columnName).Scan(&dataType).Error; err != nil {
+			common.SysLog(fmt.Sprintf("Warning: failed to query metadata for %s.%s: %v", tableName, columnName, err))
+		} else if dataType == "numeric" {
 			return // Already decimal/numeric
 		}
 		alterSQL = fmt.Sprintf(`ALTER TABLE %s ALTER COLUMN %s TYPE decimal(10,6) USING %s::decimal(10,6)`,
@@ -533,10 +540,11 @@ func migrateSubscriptionPlanPriceAmount() {
 	} else if common.UsingMySQL {
 		// MySQL: Check if already decimal
 		var columnType string
-		DB.Raw(`SELECT COLUMN_TYPE FROM information_schema.columns 
-			WHERE table_schema = DATABASE() AND table_name = ? AND column_name = ?`,
-			tableName, columnName).Scan(&columnType)
-		if strings.HasPrefix(strings.ToLower(columnType), "decimal") {
+		if err := DB.Raw(`SELECT COLUMN_TYPE FROM information_schema.columns
+				WHERE table_schema = DATABASE() AND table_name = ? AND column_name = ?`,
+			tableName, columnName).Scan(&columnType).Error; err != nil {
+			common.SysLog(fmt.Sprintf("Warning: failed to query metadata for %s.%s: %v", tableName, columnName, err))
+		} else if strings.HasPrefix(strings.ToLower(columnType), "decimal") {
 			return // Already decimal
 		}
 		alterSQL = fmt.Sprintf("ALTER TABLE %s MODIFY COLUMN %s decimal(10,6) NOT NULL DEFAULT 0",