# IRPCObjectOperations.GetObjectHistory2

Location: [gRPC API](https://developer.m-files.com/APIs/gRPC-API/index.md) > [Vault API](https://developer.m-files.com/APIs/gRPC-API/vault/index.md) > [Objects, versions, properties and files](https://developer.m-files.com/APIs/gRPC-API/Reference/MFiles.IRPCObjectOperations/index.md)

HTML version: https://developer.m-files.com/APIs/gRPC-API/Reference/MFiles.IRPCObjectOperations/GetObjectHistory2/

Badges: `Vault API / core` `write` `session or assertion` `returns metadata structure version`

Lists the existing versions of an object with their version information, oldest first.

- **Service:** [Objects, versions, properties and files](https://developer.m-files.com/APIs/gRPC-API/Reference/MFiles.IRPCObjectOperations/index.md) `MFiles.IRPCObjectOperations`
- **gRPC method:** `/MFiles.IRPCObjectOperations/GetObjectHistory2`
- **HTTP (mf-http-grpc):** `POST /grpc/v1/get-object-history2`
- **Request:** [`GetObjectHistory2Request`](https://developer.m-files.com/APIs/gRPC-API/Reference/MFiles.IRPCObjectOperations/GetObjectHistory2/index.md#request)
- **Response:** [`GetObjectHistory2Response`](https://developer.m-files.com/APIs/gRPC-API/Reference/MFiles.IRPCObjectOperations/GetObjectHistory2/index.md#response)
- **Book and level:** Vault API, core
- **Kind:** write
- **Session:** Required: a session (mfiles-session-id-bin metadata) or a session assertion (x-mf-session-assertion metadata).
- **Idempotent:** no
- **Returns metadata structure version:** yes (in the mfiles-metadata-version-bin trailer)
- **Streaming:** none (unary)

<a id="remarks"></a>

## Remarks

Like [GetObjectHistory](https://developer.m-files.com/APIs/gRPC-API/Reference/MFiles.IRPCObjectOperations/GetObjectHistory/index.md), but each item is the
full version information, including the files of the version. The `base_properties` of the
versions are not filled; read properties with
[GetProperties](https://developer.m-files.com/APIs/gRPC-API/Reference/MFiles.IRPCObjectOperations/GetProperties/index.md).

<a id="request"></a>

## Request: GetObjectHistory2Request

> Nested message fields are expanded to depth 3; follow a type link for deeper levels and for the type's own page.

| Field | Type | Description |
|---|---|---|
| `obj_id` | [`ObjID`](https://developer.m-files.com/APIs/gRPC-API/Reference/Messages/MFiles.ObjID/index.md) | The object. |
| `obj_id.type` | `int32` | The object type ID, for example 0 for documents. In a lookup value, the value list ID (for a lookup to objects, the object type ID). |
| `obj_id.item_id` | [`ItemID`](https://developer.m-files.com/APIs/gRPC-API/Reference/Messages/MFiles.ItemID/index.md) | The ID of the object within its type, in `item_id.internal_id`. |
| `obj_id.item_id.internal_id` | `int32` | The ID of the object or value list item. |
| `obj_id.item_id.external_repository_id` | [`ExternalRepositoryID`](https://developer.m-files.com/APIs/gRPC-API/Reference/Messages/MFiles.ExternalRepositoryID/index.md) | Used only for objects in external repositories (external connectors). Leave it unset for objects stored in the vault. |

<a id="response"></a>

## Response: GetObjectHistory2Response

> Nested message fields are expanded to depth 3; follow a type link for deeper levels and for the type's own page.

| Field | Type | Description |
|---|---|---|
| `results[]` | repeated [`ObjectVersionEx`](https://developer.m-files.com/APIs/gRPC-API/Reference/Messages/MFiles.ObjectVersionEx/index.md) | The version information of each version, oldest first. |
| `results[].version_info` | [`ObjectVersion`](https://developer.m-files.com/APIs/gRPC-API/Reference/Messages/MFiles.ObjectVersion/index.md) | Object Version information. |
| `results[].version_info.version` | [`ObjVerVersion`](https://developer.m-files.com/APIs/gRPC-API/Reference/Messages/MFiles.ObjVerVersion/index.md) | The version number, as a specific version. |
| `results[].version_info.display_version` | `string` | The version label to show, if it differs from the version number; empty otherwise. |
| `results[].version_info.title` | `string` | The title (name) of the object in this version. |
| `results[].version_info.is_single_file_object` | `bool` | True if the object is a single-file document, which has exactly one file. |
| `results[].version_info.has_relationships_from_this` | `bool` | Note: this field is deprecated. True if relationships from this object version to one or more documents exist. |
| `results[].version_info.has_relationships_to_this` | `bool` | Note: this field is deprecated. True if relationships from one or more documents to this object version exist. |
| `results[].version_info.has_assignments` | `bool` | True if relationships from one or more assignments to this object version exist. |
| `results[].version_info.last_modified_at_utc` | [`google.protobuf.Timestamp`](https://protobuf.dev/reference/protobuf/google.protobuf/#timestamp) | When the version was last modified, in UTC. |
| `results[].version_info.files[]` | repeated [`File`](https://developer.m-files.com/APIs/gRPC-API/Reference/Messages/MFiles.File/index.md) | The files of this version. Each `file_ver` can be passed to `DownloadFile_Begin`. |
| `results[].version_info.object_version_flags` | [`OBJVERFLAGS`](https://developer.m-files.com/APIs/gRPC-API/Reference/Messages/MFiles.OBJVERFLAGS/index.md) | Bit flags that provide additional information on the object version. |
| `results[].version_info.class_id` | `int32` | The class ID of the version. |
| `results[].version_info.version_guid` | `string` | The GUID of this version. |
| `results[].version_info.base_properties[]` | repeated [`PropertyValue`](https://developer.m-files.com/APIs/gRPC-API/Reference/Messages/MFiles.PropertyValue/index.md) | Not filled by the object read methods; read the property values with `GetObjectVersionAndPropertiesOfMultipleObjects` or `GetProperties`. |
| `results[].version_info.primary_file` | [`FileID`](https://developer.m-files.com/APIs/gRPC-API/Reference/Messages/MFiles.FileID/index.md) | File ID of the primary file of a multi-file object, if the object is a multi-file object. |
| `results[].object_info` | [`ObjectLevelInfo`](https://developer.m-files.com/APIs/gRPC-API/Reference/Messages/MFiles.ObjectLevelInfo/index.md) | Object-level information. |
| `results[].object_info.obj_id` | [`ObjID`](https://developer.m-files.com/APIs/gRPC-API/Reference/Messages/MFiles.ObjID/index.md) | The object type and ID of the object. |
| `results[].object_info.external_id_status` | [`ExtIDStatus`](https://developer.m-files.com/APIs/gRPC-API/Reference/Enums/MFiles.ExtIDStatus/index.md) | The status of this object's external ID. Values: `EXT_IDSTATUS_UNKNOWN` (0), `EXT_IDSTATUS_EXTERNAL` (1), `EXT_IDSTATUS_INTERNAL` (2), `EXT_IDSTATUS_DISCARDED` (3), `EXT_IDSTATUS_NOT_AVAILABLE` (4), `EXT_IDSTATUS_EXTERNAL_REDUCED` (5). |
| `results[].object_info.external_id` | `string` | The external ID (display ID) of this object. unset means that the external ID is the same as the internal ID. |
| `results[].object_info.checked_out_version` | [`ObjVerVersion`](https://developer.m-files.com/APIs/gRPC-API/Reference/Messages/MFiles.ObjVerVersion/index.md) | The version that is checked out. Version number 0 if the object is not checked out. |
| `results[].object_info.checked_out_to_user_id` | `int32` | The ID of the user who has the object checked out. |
| `results[].object_info.checked_out_to_user_name` | `string` | The user name of the user who has the object checked out. |
| `results[].object_info.checked_out_to_host_name` | `string` | The host name of the computer to which the object was checked out. |
| `results[].object_info.checked_out_at_utc` | [`google.protobuf.Timestamp`](https://protobuf.dev/reference/protobuf/google.protobuf/#timestamp) | The timestamp of the moment the object was checked out. |
| `results[].object_info.checked_in_version` | [`ObjVerVersion`](https://developer.m-files.com/APIs/gRPC-API/Reference/Messages/MFiles.ObjVerVersion/index.md) | The latest checked-in version. |
| `results[].object_info.created_at_utc` | [`google.protobuf.Timestamp`](https://protobuf.dev/reference/protobuf/google.protobuf/#timestamp) | The time when the object was created (same as the PROPERTYDEF_CREATED propertyvalue). |
| `results[].object_info.accessed_by_me_utc` | [`google.protobuf.Timestamp`](https://protobuf.dev/reference/protobuf/google.protobuf/#timestamp) | Accessed by me timestamp. Parallel operations may cause slight inconsistencies in the returned timestamp in rare cases and the precise value shouldn't be relied upon. The observed timestamp may even roll back. |
| `results[].object_info.guid` | `string` | The object GUID, in braces. The same value as `GetObjectGUID` returns. |
| `results[].object_info.options` | [`ITEMFLAGS`](https://developer.m-files.com/APIs/gRPC-API/Reference/Messages/MFiles.ITEMFLAGS/index.md) | Bit flags that provide additional information on the object (e.g. is the object deleted or a stub). |
| `results[].object_info.original_vault_guid` | `string` | The GUID of the vault in which the object was originally created. |
| `results[].object_info.original_vault_obj_id` | [`ObjID`](https://developer.m-files.com/APIs/gRPC-API/Reference/Messages/MFiles.ObjID/index.md) | The original objid in the vault in which the object was originally created. |
| `results[].object_info.associated_view_id` | [`ItemID`](https://developer.m-files.com/APIs/gRPC-API/Reference/Messages/MFiles.ItemID/index.md) | Identifies the view associated with this object if any. |
| `results[].object_info.external_repository_icon_id` | `string` | If not null, identifies the icon of the object. Currently applicable only to unmanaged objects. |
| `results[].object_info.primary_view_id` | [`ItemID`](https://developer.m-files.com/APIs/gRPC-API/Reference/Messages/MFiles.ItemID/index.md) | If not null, identifies the primary view of the object that is also the default opening location of the object. Currently applicable only to unmanaged objects. |
| `results[].object_info.capabilities` | [`OBJECTCAPABILITYFLAGS`](https://developer.m-files.com/APIs/gRPC-API/Reference/Messages/MFiles.OBJECTCAPABILITYFLAGS/index.md) | Bit flags that provide information on the object capabilities. |

<a id="related"></a>

## Related methods

- [GetObjectHistory](https://developer.m-files.com/APIs/gRPC-API/Reference/MFiles.IRPCObjectOperations/GetObjectHistory/index.md): Lists the existing versions of an object, oldest first.
- [GetProperties](https://developer.m-files.com/APIs/gRPC-API/Reference/MFiles.IRPCObjectOperations/GetProperties/index.md): Gets the property values of one specific object version.