# Contact
## Definitions
`contact.definitions() -> ContactDefinitionsResponse`
**get** `/v1/contacts/definitions`
Returns the schema for all field and relationship definitions available on contacts, including both system-defined and custom fields. Useful for understanding the shape of contact data before creating or updating records. See [Fields and relationships](/using-the-api/fields-and-relationships/) for more details.
**[Required scope](/using-the-api/scopes/):** `contacts:read`
**[Rate limit category](/using-the-api/rate-limits/):** Read
### Returns
- `class ContactDefinitionsResponse: …`
- `field_definitions: Dict[str, FieldDefinitions]`
Map of field keys to their definitions, including both system and custom fields.
- `description: Optional[str]`
Description of the field, or null.
- `label: str`
Human-readable display name of the field.
- `type_configuration: Dict[str, Union[str, float, bool, 3 more]]`
Type-specific configuration (e.g. select options, currency code).
- `str`
- `float`
- `bool`
- `List[Union[str, float, bool, 3 more]]`
- `str`
- `float`
- `bool`
- `List[Optional[object]]`
- `Dict[str, object]`
- `Dict[str, Union[str, float, bool, 3 more]]`
- `str`
- `float`
- `bool`
- `List[Optional[object]]`
- `Dict[str, object]`
- `value_type: Literal["ADDRESS", "CHECKBOX", "CURRENCY", 11 more]`
Data type of the field.
- `"ADDRESS"`
- `"CHECKBOX"`
- `"CURRENCY"`
- `"DATETIME"`
- `"EMAIL"`
- `"FULL_NAME"`
- `"MARKDOWN"`
- `"MULTI_SELECT"`
- `"NUMBER"`
- `"SINGLE_SELECT"`
- `"SOCIAL_HANDLE"`
- `"TELEPHONE"`
- `"TEXT"`
- `"URL"`
- `id: Optional[str]`
Unique identifier of the field definition.
- `read_only: Optional[bool]`
`true` for fields that are not writable via the API (e.g. AI-generated summaries). `false` or absent for writable fields.
- `object_type: str`
The object type these definitions belong to (e.g. `account`).
- `relationship_definitions: Dict[str, RelationshipDefinitions]`
Map of relationship keys to their definitions.
- `cardinality: Literal["HAS_ONE", "HAS_MANY"]`
Whether this is a `has_one` or `has_many` relationship.
- `"HAS_ONE"`
- `"HAS_MANY"`
- `description: Optional[str]`
Description of the relationship, or null.
- `label: str`
Human-readable display name of the relationship.
- `object_type: str`
The type of the related object (e.g. `account`, `contact`).
- `id: Optional[str]`
Unique identifier of the relationship definition.
### Example
```python
from lightfield import Lightfield
client = Lightfield(
api_key="My API Key",
)
contact_definitions_response = client.contact.definitions()
print(contact_definitions_response.field_definitions)
```
## Create
`contact.create(ContactCreateParams**kwargs) -> ContactCreateResponse`
**post** `/v1/contacts`
Creates a new contact record.
After creation, Lightfield automatically enriches the contact in the background.
Supports idempotency via the `Idempotency-Key` header.
**[Required scope](/using-the-api/scopes/):** `contacts:create`
**[Rate limit category](/using-the-api/rate-limits/):** Write
### Parameters
- `fields: Union[Dict[str, Union[str, float, bool, 3 more]]]`
Field values for the new contact. System fields use a `$` prefix (e.g. `$email`, `$name`); custom attributes use their bare slug. Note: `$name` is an object `{ firstName, lastName }`, not a plain string. Call the [definitions endpoint](/api/resources/contact/methods/definitions) to discover available fields and their types. See [Fields and relationships](/using-the-api/fields-and-relationships/) for value type details.
- `Dict[str, Union[str, float, bool, 3 more]]`
- `str`
- `float`
- `bool`
- `SequenceNotStr[Union[str, float, bool, 3 more]]`
- `str`
- `float`
- `bool`
- `Iterable[object]`
- `Dict[str, object]`
- `Dict[str, Union[str, float, bool, 3 more]]`
- `str`
- `float`
- `bool`
- `Iterable[object]`
- `Dict[str, object]`
- `relationships: Optional[Union[Dict[str, Union[str, SequenceNotStr[str]]]]]`
Relationships to set on the new contact. System relationships use a `$` prefix (e.g. `$account`); custom relationships use their bare slug. Each value is a single entity ID or an array of IDs. Call the [definitions endpoint](/api/resources/contact/methods/definitions) to list available relationship keys.
- `Dict[str, Union[str, SequenceNotStr[str]]]`
- `str`
- `SequenceNotStr[str]`
### Returns
- `class ContactCreateResponse: …`
- `id: str`
Unique identifier for the entity.
- `created_at: str`
ISO 8601 timestamp of when the entity was created.
- `fields: Dict[str, Fields]`
Map of field names to their typed values. System fields are prefixed with `$` (e.g. `$name`, `$email`); custom attributes use their bare slug.
- `value: Union[str, float, bool, 3 more]`
The field value, or null if unset.
- `str`
- `float`
- `bool`
- `List[Union[str, float, bool, 3 more]]`
- `str`
- `float`
- `bool`
- `List[Optional[object]]`
- `Dict[str, object]`
- `Dict[str, Union[str, float, bool, 3 more]]`
- `str`
- `float`
- `bool`
- `List[Optional[object]]`
- `Dict[str, object]`
- `value_type: Literal["ADDRESS", "CHECKBOX", "CURRENCY", 11 more]`
The data type of the field.
- `"ADDRESS"`
- `"CHECKBOX"`
- `"CURRENCY"`
- `"DATETIME"`
- `"EMAIL"`
- `"FULL_NAME"`
- `"MARKDOWN"`
- `"MULTI_SELECT"`
- `"NUMBER"`
- `"SINGLE_SELECT"`
- `"SOCIAL_HANDLE"`
- `"TELEPHONE"`
- `"TEXT"`
- `"URL"`
- `http_link: Optional[str]`
URL to view the entity in the Lightfield web app, or null.
- `relationships: Dict[str, Relationships]`
Map of relationship names to their associated entities. System relationships are prefixed with `$` (e.g. `$owner`, `$contact`).
- `cardinality: str`
Whether the relationship is `has_one` or `has_many`.
- `object_type: str`
The type of the related object (e.g. `account`, `contact`).
- `values: List[str]`
IDs of the related entities.
### Example
```python
from lightfield import Lightfield
client = Lightfield(
api_key="My API Key",
)
contact_create_response = client.contact.create(
fields={
"foo": "string"
},
)
print(contact_create_response.id)
```
## Update
`contact.update(strid, ContactUpdateParams**kwargs) -> ContactUpdateResponse`
**post** `/v1/contacts/{id}`
Updates an existing contact by ID. Only included fields and relationships are modified.
Supports idempotency via the `Idempotency-Key` header.
**[Required scope](/using-the-api/scopes/):** `contacts:update`
**[Rate limit category](/using-the-api/rate-limits/):** Write
### Parameters
- `id: str`
Unique identifier of the contact to update.
- `fields: Optional[Union[Dict[str, Union[str, float, bool, 3 more]]]]`
Field values to update — only provided fields are modified; omitted fields are left unchanged. System fields use a `$` prefix (e.g. `$email`); custom attributes use their bare slug. Note: `$name` is an object `{ firstName, lastName }`, not a plain string. Call the [definitions endpoint](/api/resources/contact/methods/definitions) for available fields and types. See [Fields and relationships](/using-the-api/fields-and-relationships/) for value type details.
- `Dict[str, Union[str, float, bool, 3 more]]`
- `str`
- `float`
- `bool`
- `SequenceNotStr[Union[str, float, bool, 3 more]]`
- `str`
- `float`
- `bool`
- `Iterable[object]`
- `Dict[str, object]`
- `Dict[str, Union[str, float, bool, 3 more]]`
- `str`
- `float`
- `bool`
- `Iterable[object]`
- `Dict[str, object]`
- `relationships: Optional[Union[Dict[str, RelationshipsUnionMember0RelationshipsUnionMember0Item]]]`
Relationship operations to apply. System relationships use a `$` prefix (e.g. `$account`). Each value is an operation object with `add`, `remove`, or `replace`.
- `Dict[str, RelationshipsUnionMember0RelationshipsUnionMember0Item]`
- `add: Optional[Union[str, SequenceNotStr[str]]]`
Entity ID(s) to add to the relationship.
- `str`
- `SequenceNotStr[str]`
- `remove: Optional[Union[str, SequenceNotStr[str]]]`
Entity ID(s) to remove from the relationship.
- `str`
- `SequenceNotStr[str]`
- `replace: Optional[Union[str, SequenceNotStr[str]]]`
Entity ID(s) to set as the entire relationship, replacing all existing associations.
- `str`
- `SequenceNotStr[str]`
### Returns
- `class ContactUpdateResponse: …`
- `id: str`
Unique identifier for the entity.
- `created_at: str`
ISO 8601 timestamp of when the entity was created.
- `fields: Dict[str, Fields]`
Map of field names to their typed values. System fields are prefixed with `$` (e.g. `$name`, `$email`); custom attributes use their bare slug.
- `value: Union[str, float, bool, 3 more]`
The field value, or null if unset.
- `str`
- `float`
- `bool`
- `List[Union[str, float, bool, 3 more]]`
- `str`
- `float`
- `bool`
- `List[Optional[object]]`
- `Dict[str, object]`
- `Dict[str, Union[str, float, bool, 3 more]]`
- `str`
- `float`
- `bool`
- `List[Optional[object]]`
- `Dict[str, object]`
- `value_type: Literal["ADDRESS", "CHECKBOX", "CURRENCY", 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"`
- `http_link: Optional[str]`
URL to view the entity in the Lightfield web app, or null.
- `relationships: Dict[str, Relationships]`
Map of relationship names to their associated entities. System relationships are prefixed with `$` (e.g. `$owner`, `$contact`).
- `cardinality: str`
Whether the relationship is `has_one` or `has_many`.
- `object_type: str`
The type of the related object (e.g. `account`, `contact`).
- `values: List[str]`
IDs of the related entities.
### Example
```python
from lightfield import Lightfield
client = Lightfield(
api_key="My API Key",
)
contact_update_response = client.contact.update(
id="id",
)
print(contact_update_response.id)
```
## Retrieve
`contact.retrieve(strid) -> ContactRetrieveResponse`
**get** `/v1/contacts/{id}`
Retrieves a single contact by its ID.
**[Required scope](/using-the-api/scopes/):** `contacts:read`
**[Rate limit category](/using-the-api/rate-limits/):** Read
### Parameters
- `id: str`
Unique identifier of the contact to retrieve.
### Returns
- `class ContactRetrieveResponse: …`
- `id: str`
Unique identifier for the entity.
- `created_at: str`
ISO 8601 timestamp of when the entity was created.
- `fields: Dict[str, Fields]`
Map of field names to their typed values. System fields are prefixed with `$` (e.g. `$name`, `$email`); custom attributes use their bare slug.
- `value: Union[str, float, bool, 3 more]`
The field value, or null if unset.
- `str`
- `float`
- `bool`
- `List[Union[str, float, bool, 3 more]]`
- `str`
- `float`
- `bool`
- `List[Optional[object]]`
- `Dict[str, object]`
- `Dict[str, Union[str, float, bool, 3 more]]`
- `str`
- `float`
- `bool`
- `List[Optional[object]]`
- `Dict[str, object]`
- `value_type: Literal["ADDRESS", "CHECKBOX", "CURRENCY", 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"`
- `http_link: Optional[str]`
URL to view the entity in the Lightfield web app, or null.
- `relationships: Dict[str, Relationships]`
Map of relationship names to their associated entities. System relationships are prefixed with `$` (e.g. `$owner`, `$contact`).
- `cardinality: str`
Whether the relationship is `has_one` or `has_many`.
- `object_type: str`
The type of the related object (e.g. `account`, `contact`).
- `values: List[str]`
IDs of the related entities.
### Example
```python
from lightfield import Lightfield
client = Lightfield(
api_key="My API Key",
)
contact_retrieve_response = client.contact.retrieve(
"id",
)
print(contact_retrieve_response.id)
```
## List
`contact.list(ContactListParams**kwargs) -> ContactListResponse`
**get** `/v1/contacts`
Returns a paginated list of contacts. Use `offset` and `limit` to paginate through results. See [List endpoints](/using-the-api/list-endpoints/) for more information about pagination.
**[Required scope](/using-the-api/scopes/):** `contacts:read`
**[Rate limit category](/using-the-api/rate-limits/):** Search
### Parameters
- `limit: Optional[int]`
Maximum number of records to return. Defaults to 25, maximum 25.
- `offset: Optional[int]`
Number of records to skip for pagination. Defaults to 0.
### Returns
- `class ContactListResponse: …`
- `data: List[Data]`
Array of entity objects for the current page.
- `id: str`
Unique identifier for the entity.
- `created_at: str`
ISO 8601 timestamp of when the entity was created.
- `fields: Dict[str, DataFields]`
Map of field names to their typed values. System fields are prefixed with `$` (e.g. `$name`, `$email`); custom attributes use their bare slug.
- `value: Union[str, float, bool, 3 more]`
The field value, or null if unset.
- `str`
- `float`
- `bool`
- `List[Union[str, float, bool, 3 more]]`
- `str`
- `float`
- `bool`
- `List[Optional[object]]`
- `Dict[str, object]`
- `Dict[str, Union[str, float, bool, 3 more]]`
- `str`
- `float`
- `bool`
- `List[Optional[object]]`
- `Dict[str, object]`
- `value_type: Literal["ADDRESS", "CHECKBOX", "CURRENCY", 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"`
- `http_link: Optional[str]`
URL to view the entity in the Lightfield web app, or null.
- `relationships: Dict[str, DataRelationships]`
Map of relationship names to their associated entities. System relationships are prefixed with `$` (e.g. `$owner`, `$contact`).
- `cardinality: str`
Whether the relationship is `has_one` or `has_many`.
- `object_type: str`
The type of the related object (e.g. `account`, `contact`).
- `values: List[str]`
IDs of the related entities.
- `object: str`
The object type, always `"list"`.
- `total_count: int`
Total number of entities matching the query.
### Example
```python
from lightfield import Lightfield
client = Lightfield(
api_key="My API Key",
)
contact_list_response = client.contact.list()
print(contact_list_response.data)
```
## Domain Types
### Contact Create Response
- `class ContactCreateResponse: …`
- `id: str`
Unique identifier for the entity.
- `created_at: str`
ISO 8601 timestamp of when the entity was created.
- `fields: Dict[str, Fields]`
Map of field names to their typed values. System fields are prefixed with `$` (e.g. `$name`, `$email`); custom attributes use their bare slug.
- `value: Union[str, float, bool, 3 more]`
The field value, or null if unset.
- `str`
- `float`
- `bool`
- `List[Union[str, float, bool, 3 more]]`
- `str`
- `float`
- `bool`
- `List[Optional[object]]`
- `Dict[str, object]`
- `Dict[str, Union[str, float, bool, 3 more]]`
- `str`
- `float`
- `bool`
- `List[Optional[object]]`
- `Dict[str, object]`
- `value_type: Literal["ADDRESS", "CHECKBOX", "CURRENCY", 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"`
- `http_link: Optional[str]`
URL to view the entity in the Lightfield web app, or null.
- `relationships: Dict[str, Relationships]`
Map of relationship names to their associated entities. System relationships are prefixed with `$` (e.g. `$owner`, `$contact`).
- `cardinality: str`
Whether the relationship is `has_one` or `has_many`.
- `object_type: str`
The type of the related object (e.g. `account`, `contact`).
- `values: List[str]`
IDs of the related entities.
### Contact Definitions Response
- `class ContactDefinitionsResponse: …`
- `field_definitions: Dict[str, FieldDefinitions]`
Map of field keys to their definitions, including both system and custom fields.
- `description: Optional[str]`
Description of the field, or null.
- `label: str`
Human-readable display name of the field.
- `type_configuration: Dict[str, Union[str, float, bool, 3 more]]`
Type-specific configuration (e.g. select options, currency code).
- `str`
- `float`
- `bool`
- `List[Union[str, float, bool, 3 more]]`
- `str`
- `float`
- `bool`
- `List[Optional[object]]`
- `Dict[str, object]`
- `Dict[str, Union[str, float, bool, 3 more]]`
- `str`
- `float`
- `bool`
- `List[Optional[object]]`
- `Dict[str, object]`
- `value_type: Literal["ADDRESS", "CHECKBOX", "CURRENCY", 11 more]`
Data type of the field.
- `"ADDRESS"`
- `"CHECKBOX"`
- `"CURRENCY"`
- `"DATETIME"`
- `"EMAIL"`
- `"FULL_NAME"`
- `"MARKDOWN"`
- `"MULTI_SELECT"`
- `"NUMBER"`
- `"SINGLE_SELECT"`
- `"SOCIAL_HANDLE"`
- `"TELEPHONE"`
- `"TEXT"`
- `"URL"`
- `id: Optional[str]`
Unique identifier of the field definition.
- `read_only: Optional[bool]`
`true` for fields that are not writable via the API (e.g. AI-generated summaries). `false` or absent for writable fields.
- `object_type: str`
The object type these definitions belong to (e.g. `account`).
- `relationship_definitions: Dict[str, RelationshipDefinitions]`
Map of relationship keys to their definitions.
- `cardinality: Literal["HAS_ONE", "HAS_MANY"]`
Whether this is a `has_one` or `has_many` relationship.
- `"HAS_ONE"`
- `"HAS_MANY"`
- `description: Optional[str]`
Description of the relationship, or null.
- `label: str`
Human-readable display name of the relationship.
- `object_type: str`
The type of the related object (e.g. `account`, `contact`).
- `id: Optional[str]`
Unique identifier of the relationship definition.
### Contact List Response
- `class ContactListResponse: …`
- `data: List[Data]`
Array of entity objects for the current page.
- `id: str`
Unique identifier for the entity.
- `created_at: str`
ISO 8601 timestamp of when the entity was created.
- `fields: Dict[str, DataFields]`
Map of field names to their typed values. System fields are prefixed with `$` (e.g. `$name`, `$email`); custom attributes use their bare slug.
- `value: Union[str, float, bool, 3 more]`
The field value, or null if unset.
- `str`
- `float`
- `bool`
- `List[Union[str, float, bool, 3 more]]`
- `str`
- `float`
- `bool`
- `List[Optional[object]]`
- `Dict[str, object]`
- `Dict[str, Union[str, float, bool, 3 more]]`
- `str`
- `float`
- `bool`
- `List[Optional[object]]`
- `Dict[str, object]`
- `value_type: Literal["ADDRESS", "CHECKBOX", "CURRENCY", 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"`
- `http_link: Optional[str]`
URL to view the entity in the Lightfield web app, or null.
- `relationships: Dict[str, DataRelationships]`
Map of relationship names to their associated entities. System relationships are prefixed with `$` (e.g. `$owner`, `$contact`).
- `cardinality: str`
Whether the relationship is `has_one` or `has_many`.
- `object_type: str`
The type of the related object (e.g. `account`, `contact`).
- `values: List[str]`
IDs of the related entities.
- `object: str`
The object type, always `"list"`.
- `total_count: int`
Total number of entities matching the query.
### Contact Retrieve Response
- `class ContactRetrieveResponse: …`
- `id: str`
Unique identifier for the entity.
- `created_at: str`
ISO 8601 timestamp of when the entity was created.
- `fields: Dict[str, Fields]`
Map of field names to their typed values. System fields are prefixed with `$` (e.g. `$name`, `$email`); custom attributes use their bare slug.
- `value: Union[str, float, bool, 3 more]`
The field value, or null if unset.
- `str`
- `float`
- `bool`
- `List[Union[str, float, bool, 3 more]]`
- `str`
- `float`
- `bool`
- `List[Optional[object]]`
- `Dict[str, object]`
- `Dict[str, Union[str, float, bool, 3 more]]`
- `str`
- `float`
- `bool`
- `List[Optional[object]]`
- `Dict[str, object]`
- `value_type: Literal["ADDRESS", "CHECKBOX", "CURRENCY", 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"`
- `http_link: Optional[str]`
URL to view the entity in the Lightfield web app, or null.
- `relationships: Dict[str, Relationships]`
Map of relationship names to their associated entities. System relationships are prefixed with `$` (e.g. `$owner`, `$contact`).
- `cardinality: str`
Whether the relationship is `has_one` or `has_many`.
- `object_type: str`
The type of the related object (e.g. `account`, `contact`).
- `values: List[str]`
IDs of the related entities.
### Contact Update Response
- `class ContactUpdateResponse: …`
- `id: str`
Unique identifier for the entity.
- `created_at: str`
ISO 8601 timestamp of when the entity was created.
- `fields: Dict[str, Fields]`
Map of field names to their typed values. System fields are prefixed with `$` (e.g. `$name`, `$email`); custom attributes use their bare slug.
- `value: Union[str, float, bool, 3 more]`
The field value, or null if unset.
- `str`
- `float`
- `bool`
- `List[Union[str, float, bool, 3 more]]`
- `str`
- `float`
- `bool`
- `List[Optional[object]]`
- `Dict[str, object]`
- `Dict[str, Union[str, float, bool, 3 more]]`
- `str`
- `float`
- `bool`
- `List[Optional[object]]`
- `Dict[str, object]`
- `value_type: Literal["ADDRESS", "CHECKBOX", "CURRENCY", 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"`
- `http_link: Optional[str]`
URL to view the entity in the Lightfield web app, or null.
- `relationships: Dict[str, Relationships]`
Map of relationship names to their associated entities. System relationships are prefixed with `$` (e.g. `$owner`, `$contact`).
- `cardinality: str`
Whether the relationship is `has_one` or `has_many`.
- `object_type: str`
The type of the related object (e.g. `account`, `contact`).
- `values: List[str]`
IDs of the related entities.