## Update a custom object record

**post** `/v1/objects/{entitySlug}/values/{id}`

Updates an existing record by ID for the specified custom object type. Only included fields and relationships are modified.

### Path Parameters

- `entitySlug: string`

  The slug of the custom object type.

- `id: string`

  The ID of the record to update.

### Body Parameters

- `fields: optional map[string or number or boolean or 3 more]`

  Field names to values. Only provided fields are modified.

  - `string`

  - `number`

  - `boolean`

  - `array of string`

  - `Address object { city, country, latitude, 5 more }`

    - `city: optional string`

      City name.

    - `country: optional string`

      2-letter ISO 3166-1 alpha-2 country code.

    - `latitude: optional number`

      Latitude coordinate.

    - `longitude: optional number`

      Longitude coordinate.

    - `postalCode: optional string`

      Postal or ZIP code.

    - `state: optional string`

      State or province.

    - `street: optional string`

      Street address line 1.

    - `street2: optional string`

      Street address line 2.

  - `FullName object { firstName, lastName }`

    - `firstName: optional string`

      The contact's first name.

    - `lastName: optional string`

      The contact's last name.

- `relationships: optional map[object { add, remove, replace } ]`

  Relationship names to operations (`add`, `remove`, or `replace`).

  - `add: optional string or array of string`

    Entity ID(s) to add to the relationship.

    - `string`

    - `array of string`

  - `remove: optional string or array of string`

    Entity ID(s) to remove from the relationship.

    - `string`

    - `array of string`

  - `replace: optional string or array of string`

    Entity ID(s) to set as the entire relationship, replacing all existing associations.

    - `string`

    - `array of string`

### Returns

- `ObjectUpdateResponse object { id, createdAt, fields, 4 more }`

  - `id: string`

    Unique identifier for the entity.

  - `createdAt: string`

    ISO 8601 timestamp of when the entity was created.

  - `fields: map[object { value, valueType } ]`

    Map of field names to their typed values. System fields are prefixed with `$` (e.g. `$name`, `$email`); custom attributes use their bare slug.

    - `value: string or number or boolean or 3 more`

      The field value, or null if unset.

      - `string`

      - `number`

      - `boolean`

      - `array of string`

      - `Address object { city, country, latitude, 5 more }`

        - `city: optional string`

          City name.

        - `country: optional string`

          2-letter ISO 3166-1 alpha-2 country code.

        - `latitude: optional number`

          Latitude coordinate.

        - `longitude: optional number`

          Longitude coordinate.

        - `postalCode: optional string`

          Postal or ZIP code.

        - `state: optional string`

          State or province.

        - `street: optional string`

          Street address line 1.

        - `street2: optional string`

          Street address line 2.

      - `FullName object { firstName, lastName }`

        - `firstName: optional string`

          The contact's first name.

        - `lastName: optional string`

          The contact's last name.

    - `valueType: "ADDRESS" or "CHECKBOX" or "CURRENCY" or 11 more`

      The data type of the field.

      - `"ADDRESS"`

      - `"CHECKBOX"`

      - `"CURRENCY"`

      - `"DATETIME"`

      - `"EMAIL"`

      - `"FULL_NAME"`

      - `"MARKDOWN"`

      - `"MULTI_SELECT"`

      - `"NUMBER"`

      - `"SINGLE_SELECT"`

      - `"SOCIAL_HANDLE"`

      - `"TELEPHONE"`

      - `"TEXT"`

      - `"URL"`

  - `httpLink: string`

    URL to view the entity in the Lightfield web app, or null.

  - `relationships: map[object { cardinality, objectType, values } ]`

    Map of relationship names to their associated entities. System relationships are prefixed with `$` (e.g. `$owner`, `$contact`).

    - `cardinality: string`

      Whether the relationship is `has_one` or `has_many`.

    - `objectType: string`

      The type of the related object (e.g. `account`, `contact`).

    - `values: array of string`

      IDs of the related entities.

  - `updatedAt: string`

    ISO 8601 timestamp of when the entity was last updated, or null.

  - `externalId: optional string`

    External identifier for the entity, or null if unset.

### Example

```http
curl https://api.lightfield.app/v1/objects/$ENTITY_SLUG/values/$ID \
    -H 'Content-Type: application/json' \
    -H 'Lightfield-Version: 2026-03-01' \
    -H "Authorization: Bearer $API_KEY" \
    -d '{}'
```

#### Response

```json
{
  "id": "id",
  "createdAt": "createdAt",
  "fields": {
    "foo": {
      "value": "string",
      "valueType": "ADDRESS"
    }
  },
  "httpLink": "httpLink",
  "relationships": {
    "foo": {
      "cardinality": "cardinality",
      "objectType": "objectType",
      "values": [
        "string"
      ]
    }
  },
  "updatedAt": "updatedAt",
  "externalId": "externalId"
}
```