# FieldType

Represents the type of a custom field in YouTrack.

## Related Resources

Below you can find the list of resources that let you work with this entity.

* [Field Types](resource-api-admin-customFieldSettings-types.html)

## Attributes

This table describes attributes of the `FieldType` entity.

* To receive an attribute in the response from the server, specify it explicitly in the `fields` request parameter.

* To update an attribute, provide it in the body of a POST request.

|  Field  |  Type  |  Description  |
| --- | --- | --- |
|  id  |  String  |     A string representation of the custom field type.       For the full list of possible field types, see the Custom Field Type column at [Type Mapping for Custom Fields](api-concept-custom-fields.html#type-issue-custom-fields).    `Read-only`.  |