Fix auto migration with transaction, close go-gorm/gorm#5175

Author: jinzhu

migrator.go

@@ -155,90 +155,93 @@ func (m Migrator) ColumnTypes(value interface{}) ([]gorm.ColumnType, error) {
 			return err
 		}
 
-		defer func() {
-			err = rows.Close()
-		}()
-
-		var (
-			rawColumnTypes, _ = rows.ColumnTypes()
-			columnTypeSQL     = "SELECT column_name, data_type, column_default, is_nullable, character_maximum_length, numeric_precision, numeric_precision_radix, numeric_scale, datetime_precision FROM INFORMATION_SCHEMA.COLUMNS WHERE table_catalog = ? AND table_name = ?"
-			columns, rowErr   = m.DB.Raw(columnTypeSQL, m.CurrentDatabase(), stmt.Table).Rows()
-		)
-
-		if rowErr != nil {
-			return rowErr
-		}
-
-		defer columns.Close()
+		rawColumnTypes, _ := rows.ColumnTypes()
+		rows.Close()
 
-		for columns.Next() {
+		{
 			var (
-				column = migrator.ColumnType{
-					PrimaryKeyValue: sql.NullBool{Valid: true},
-					UniqueValue:     sql.NullBool{Valid: true},
-				}
-				datetimePrecision sql.NullInt64
-				radixValue        sql.NullInt64
-				nullableValue     sql.NullString
-				values            = []interface{}{
-					&column.NameValue, &column.ColumnTypeValue, &column.DefaultValueValue, &nullableValue, &column.LengthValue, &column.DecimalSizeValue, &radixValue, &column.ScaleValue, &datetimePrecision,
-				}
+				columnTypeSQL   = "SELECT column_name, data_type, column_default, is_nullable, character_maximum_length, numeric_precision, numeric_precision_radix, numeric_scale, datetime_precision FROM INFORMATION_SCHEMA.COLUMNS WHERE table_catalog = ? AND table_name = ?"
+				columns, rowErr = m.DB.Raw(columnTypeSQL, m.CurrentDatabase(), stmt.Table).Rows()
 			)
 
-			if scanErr := columns.Scan(values...); scanErr != nil {
-				return scanErr
+			if rowErr != nil {
+				return rowErr
 			}
 
-			if nullableValue.Valid {
-				column.NullableValue = sql.NullBool{Bool: strings.EqualFold(nullableValue.String, "YES"), Valid: true}
-			}
+			for columns.Next() {
+				var (
+					column = migrator.ColumnType{
+						PrimaryKeyValue: sql.NullBool{Valid: true},
+						UniqueValue:     sql.NullBool{Valid: true},
+					}
+					datetimePrecision sql.NullInt64
+					radixValue        sql.NullInt64
+					nullableValue     sql.NullString
+					values            = []interface{}{
+						&column.NameValue, &column.ColumnTypeValue, &column.DefaultValueValue, &nullableValue, &column.LengthValue, &column.DecimalSizeValue, &radixValue, &column.ScaleValue, &datetimePrecision,
+					}
+				)
 
-			if datetimePrecision.Valid {
-				column.DecimalSizeValue = datetimePrecision
-			}
+				if scanErr := columns.Scan(values...); scanErr != nil {
+					return scanErr
+				}
 
-			if column.DefaultValueValue.Valid {
-				matches := defaultValueTrimRegexp.FindStringSubmatch(column.DefaultValueValue.String)
-				for len(matches) > 1 {
-					column.DefaultValueValue.String = matches[1]
-					matches = defaultValueTrimRegexp.FindStringSubmatch(column.DefaultValueValue.String)
+				if nullableValue.Valid {
+					column.NullableValue = sql.NullBool{Bool: strings.EqualFold(nullableValue.String, "YES"), Valid: true}
+				}
+
+				if datetimePrecision.Valid {
+					column.DecimalSizeValue = datetimePrecision
+				}
+
+				if column.DefaultValueValue.Valid {
+					matches := defaultValueTrimRegexp.FindStringSubmatch(column.DefaultValueValue.String)
+					for len(matches) > 1 {
+						column.DefaultValueValue.String = matches[1]
+						matches = defaultValueTrimRegexp.FindStringSubmatch(column.DefaultValueValue.String)
+					}
+				} else {
+					column.DefaultValueValue.Valid = true
 				}
-			} else {
-				column.DefaultValueValue.Valid = true
-			}
 
-			for _, c := range rawColumnTypes {
-				if c.Name() == column.NameValue.String {
-					column.SQLColumnType = c
-					break
+				for _, c := range rawColumnTypes {
+					if c.Name() == column.NameValue.String {
+						column.SQLColumnType = c
+						break
+					}
 				}
+
+				columnTypes = append(columnTypes, column)
 			}
 
-			columnTypes = append(columnTypes, column)
+			columns.Close()
 		}
 
-		columnTypeRows, err := m.DB.Raw("SELECT c.column_name, t.constraint_type FROM information_schema.table_constraints t JOIN information_schema.constraint_column_usage c ON c.constraint_name=t.constraint_name WHERE t.constraint_type IN ('PRIMARY KEY', 'UNIQUE') AND c.table_catalog = ? AND c.table_name = ?", m.CurrentDatabase(), stmt.Table).Rows()
-		if err != nil {
-			return err
-		}
-		defer columnTypeRows.Close()
-
-		for columnTypeRows.Next() {
-			var name, columnType string
-			columnTypeRows.Scan(&name, &columnType)
-			for idx, c := range columnTypes {
-				mc := c.(migrator.ColumnType)
-				if mc.NameValue.String == name {
-					switch columnType {
-					case "PRIMARY KEY":
-						mc.PrimaryKeyValue = sql.NullBool{Bool: true, Valid: true}
-					case "UNIQUE":
-						mc.UniqueValue = sql.NullBool{Bool: true, Valid: true}
+		{
+			columnTypeRows, err := m.DB.Raw("SELECT c.column_name, t.constraint_type FROM information_schema.table_constraints t JOIN information_schema.constraint_column_usage c ON c.constraint_name=t.constraint_name WHERE t.constraint_type IN ('PRIMARY KEY', 'UNIQUE') AND c.table_catalog = ? AND c.table_name = ?", m.CurrentDatabase(), stmt.Table).Rows()
+			if err != nil {
+				return err
+			}
+
+			for columnTypeRows.Next() {
+				var name, columnType string
+				columnTypeRows.Scan(&name, &columnType)
+				for idx, c := range columnTypes {
+					mc := c.(migrator.ColumnType)
+					if mc.NameValue.String == name {
+						switch columnType {
+						case "PRIMARY KEY":
+							mc.PrimaryKeyValue = sql.NullBool{Bool: true, Valid: true}
+						case "UNIQUE":
+							mc.UniqueValue = sql.NullBool{Bool: true, Valid: true}
+						}
+						columnTypes[idx] = mc
+						break
 					}
-					columnTypes[idx] = mc
-					break
 				}
 			}
+
+			columnTypeRows.Close()
 		}
 
 		return