go-gorm/gorm · error

invalid serializer type %v

Error message

invalid serializer type %v

What it means

Error "invalid serializer type %v" thrown in go-gorm/gorm.

Source

Thrown at schema/field.go:201

			getRealFieldValue(fieldValue)
		}
	}

	if v, isSerializer := fieldValue.Interface().(SerializerInterface); isSerializer {
		field.DataType = String
		field.Serializer = v
	} else {
		serializerName := field.TagSettings["JSON"]
		if serializerName == "" {
			serializerName = field.TagSettings["SERIALIZER"]
		}
		if serializerName != "" {
			if serializer, ok := GetSerializer(serializerName); ok {
				// Set default data type to string for serializer
				field.DataType = String
				field.Serializer = serializer
			} else {
				schema.err = fmt.Errorf("invalid serializer type %v", serializerName)
			}
		}
	}

	if num, ok := field.TagSettings["AUTOINCREMENTINCREMENT"]; ok {
		field.AutoIncrementIncrement, _ = strconv.ParseInt(num, 10, 64)
	}

	if v, ok := field.TagSettings["DEFAULT"]; ok {
		field.HasDefaultValue = true
		field.DefaultValue = v
	}

	if num, ok := field.TagSettings["SIZE"]; ok {
		if field.Size, err = strconv.Atoi(num); err != nil {
			field.Size = -1
		}
	}

View on GitHub (pinned to 1d6ce99528)

Solutions

1. Use a registered serializer name in the tag, e.g. `gorm:"serializer:json"`.
2. Register the custom serializer with schema.RegisterSerializer before parsing.
3. Check for typos in the serializer tag value.

Example fix

Use a registered serializer type in the tag, e.g. `gorm:"serializer:json"`, and register custom ones via schema.RegisterSerializer.

When it happens

Trigger: Thrown at schema/field.go:201 when the library encounters an invalid state.

Common situations: See trigger scenarios.

AI-assisted analysis of go-gorm/gorm@1d6ce99528 (2026-08-15). Data as JSON: /api/errors/71d20689d76c23a8. Report an issue: GitHub.