failed to parse %s as default value for float, got error: %v

Error message

failed to parse %s as default value for float, got error: %v

What it means

Error "failed to parse %s as default value for float, got error: %v" thrown in go-gorm/gorm.

Source

Thrown at schema/field.go:259

	case reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64:
		field.DataType = Int
		if field.HasDefaultValue && !skipParseDefaultValue {
			if field.DefaultValueInterface, err = strconv.ParseInt(field.DefaultValue, 0, 64); err != nil {
				schema.err = fmt.Errorf("failed to parse %s as default value for int, got error: %v", field.DefaultValue, err)
			}
		}
	case reflect.Uint, reflect.Uint8, reflect.Uint16, reflect.Uint32, reflect.Uint64:
		field.DataType = Uint
		if field.HasDefaultValue && !skipParseDefaultValue {
			if field.DefaultValueInterface, err = strconv.ParseUint(field.DefaultValue, 0, 64); err != nil {
				schema.err = fmt.Errorf("failed to parse %s as default value for uint, got error: %v", field.DefaultValue, err)
			}
		}
	case reflect.Float32, reflect.Float64:
		field.DataType = Float
		if field.HasDefaultValue && !skipParseDefaultValue {
			if field.DefaultValueInterface, err = strconv.ParseFloat(field.DefaultValue, 64); err != nil {
				schema.err = fmt.Errorf("failed to parse %s as default value for float, got error: %v", field.DefaultValue, err)
			}
		}
	case reflect.String:
		field.DataType = String
		if field.HasDefaultValue && !skipParseDefaultValue {
			field.DefaultValue = strings.Trim(field.DefaultValue, "'")
			field.DefaultValue = strings.Trim(field.DefaultValue, `"`)
			field.DefaultValueInterface = field.DefaultValue
		}
	case reflect.Struct:
		if _, ok := fieldValue.Interface().(*time.Time); ok {
			field.DataType = Time
		} else if fieldValue.Type().ConvertibleTo(TimeReflectType) {
			field.DataType = Time
		} else if fieldValue.Type().ConvertibleTo(TimePtrReflectType) {
			field.DataType = Time
		}
		if field.HasDefaultValue && !skipParseDefaultValue && field.DataType == Time {

View on GitHub (pinned to 1d6ce99528)

Solutions

Use a valid float literal in the default tag, e.g. `gorm:"default:1.5"`.
Check for stray characters in the default tag value.
Ensure the literal parses with strconv.ParseFloat.

Example fix

Use a valid float literal in the default tag: `gorm:"default:1.5"`.

When it happens

Trigger: Thrown at schema/field.go:259 when the library encounters an invalid state.

Common situations: See trigger scenarios.

Understand the failure class

Parsing and encoding errors: unexpected token, malformed input — why parsers reject input and how to find the real culprit.

AI-assisted analysis of go-gorm/gorm@1d6ce99528 (2026-08-15). Data as JSON: /api/errors/73c5054bea8c1661. Report an issue: GitHub.