# IRPCObjectOperations.UndoCheckout

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/UndoCheckout/

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

Undoes the checkout of one object.

- **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/UndoCheckout`
- **HTTP (mf-http-grpc):** `POST /grpc/v1/undo-checkout`
- **Request:** [`UndoCheckoutRequest`](https://developer.m-files.com/APIs/gRPC-API/Reference/MFiles.IRPCObjectOperations/UndoCheckout/index.md#request)
- **Response:** [`UndoCheckoutResponse`](https://developer.m-files.com/APIs/gRPC-API/Reference/MFiles.IRPCObjectOperations/UndoCheckout/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

Discards the checked-out version and all changes made to it; the latest checked-in version becomes
the latest version again. For a new object that has never been checked in, undoing the check-out
discards the whole object.

`obj_ver` must name the checked-out version by number; the LATEST marker fails with "Not found.
Invalid object version: -1". Undoing a check-out of an object that is not checked out
fails with "The object is not checked out."

Without `force`, only the user who checked the object out can undo the check-out, from the same
computer. With `force`, the user can undo their own check-out from any computer, and a user with
the vault-level right to force undo check-out (`force_undo_checkout`) can undo anyone's check-out.

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

## Request: UndoCheckoutRequest

> 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_ver` | [`ObjVer`](https://developer.m-files.com/APIs/gRPC-API/Reference/Messages/MFiles.ObjVer/index.md) | The checked-out version, by number. The LATEST marker is not accepted. |
| `obj_ver.obj_id` | [`ObjID`](https://developer.m-files.com/APIs/gRPC-API/Reference/Messages/MFiles.ObjID/index.md) | The object. |
| `obj_ver.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_ver.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_ver.version` | [`ObjVerVersion`](https://developer.m-files.com/APIs/gRPC-API/Reference/Messages/MFiles.ObjVerVersion/index.md) | The version. Usually `OBJ_VER_VERSION_TYPE_SPECIFIC` with `internal_version`. |
| `obj_ver.version.type` | [`ObjVerVersionType`](https://developer.m-files.com/APIs/gRPC-API/Reference/Enums/MFiles.ObjVerVersionType/index.md) | What `internal_version` means. `OBJ_VER_VERSION_TYPE_SPECIFIC` for a version number. Values: `OBJ_VER_VERSION_TYPE_UNINITIALIZED` (0), `OBJ_VER_VERSION_TYPE_LATEST` (1), `OBJ_VER_VERSION_TYPE_ANY` (2), `OBJ_VER_VERSION_TYPE_ALL` (3), `OBJ_VER_VERSION_TYPE_SPECIFIC` (4), `OBJ_VER_VERSION_TYPE_VALUE_LIST_ITEM` (6), `OBJ_VER_VERSION_TYPE_OBJECT_LEVEL_REFERENCE` (7). |
| `obj_ver.version.internal_version` | `int32` | The version number, starting from 1, when `type` is `OBJ_VER_VERSION_TYPE_SPECIFIC`. The server returns -1 with `OBJ_VER_VERSION_TYPE_LATEST`. |
| `obj_ver.version.external_repository_version` | `string` | Used only for objects in external repositories. Leave empty. |
| `obj_ver.version.external_repository_sort_key` | `int64` | Used only for objects in external repositories. Leave 0. |
| `force` | `bool` | True to undo a check-out made from another computer, or by another user (requires the vault-level right to force undo check-out). |

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

## Response: UndoCheckoutResponse

> 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 |
|---|---|---|
| `object_info` | [`ExtObjectInfo`](https://developer.m-files.com/APIs/gRPC-API/Reference/Messages/MFiles.ExtObjectInfo/index.md) | The object after the operation. Its `latest_version` carries no property values. |
| `object_info.is_visible` | `bool` | True if any version of the object is visible to the caller. |
| `object_info.object_info` | [`ObjectLevelInfo`](https://developer.m-files.com/APIs/gRPC-API/Reference/Messages/MFiles.ObjectLevelInfo/index.md) | Object-level information, if `is_visible` is true. |
| `object_info.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. |
| `object_info.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). |
| `object_info.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. |
| `object_info.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. |
| `object_info.object_info.checked_out_to_user_id` | `int32` | The ID of the user who has the object checked out. |
| `object_info.object_info.checked_out_to_user_name` | `string` | The user name of the user who has the object checked out. |
| `object_info.object_info.checked_out_to_host_name` | `string` | The host name of the computer to which the object was checked out. |
| `object_info.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. |
| `object_info.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. |
| `object_info.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). |
| `object_info.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. |
| `object_info.object_info.guid` | `string` | The object GUID, in braces. The same value as `GetObjectGUID` returns. |
| `object_info.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). |
| `object_info.object_info.original_vault_guid` | `string` | The GUID of the vault in which the object was originally created. |
| `object_info.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. |
| `object_info.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. |
| `object_info.object_info.external_repository_icon_id` | `string` | If not null, identifies the icon of the object. Currently applicable only to unmanaged objects. |
| `object_info.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. |
| `object_info.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. |
| `object_info.is_latest_version_visible` | `bool` | True if the latest version of the object is visible to the caller. |
| `object_info.latest_version` | [`ObjectVersionExWP`](https://developer.m-files.com/APIs/gRPC-API/Reference/Messages/MFiles.ObjectVersionExWP/index.md) | The latest version of the object with its properties and ACL, if `is_latest_version_visible` is true. Some methods (for example UndoCheckout) return it without property values. |
| `object_info.latest_version.object_version` | [`ObjectVersionEx`](https://developer.m-files.com/APIs/gRPC-API/Reference/Messages/MFiles.ObjectVersionEx/index.md) | Object info. |
| `object_info.latest_version.properties[]` | repeated [`PropertyValue`](https://developer.m-files.com/APIs/gRPC-API/Reference/Messages/MFiles.PropertyValue/index.md) | Property values, or an empty array. |
| `object_info.latest_version.acl` | [`AccessControlList`](https://developer.m-files.com/APIs/gRPC-API/Reference/Messages/MFiles.AccessControlList/index.md) | If set, ACL. |
| `object_info.latest_version.current_user_permissions` | [`ObjectPermissionsForClient`](https://developer.m-files.com/APIs/gRPC-API/Reference/Messages/MFiles.ObjectPermissionsForClient/index.md) | If set, permissions of the object version. |
| `object_info.original_obj_ver` | [`ObjVer`](https://developer.m-files.com/APIs/gRPC-API/Reference/Messages/MFiles.ObjVer/index.md) | The object version the request named, as sent. The version part may be unset. |
| `object_info.original_obj_ver.obj_id` | [`ObjID`](https://developer.m-files.com/APIs/gRPC-API/Reference/Messages/MFiles.ObjID/index.md) | The object. |
| `object_info.original_obj_ver.version` | [`ObjVerVersion`](https://developer.m-files.com/APIs/gRPC-API/Reference/Messages/MFiles.ObjVerVersion/index.md) | The version. Usually `OBJ_VER_VERSION_TYPE_SPECIFIC` with `internal_version`. |
| `updated_objects[]` | repeated [`ObjectVersionEx`](https://developer.m-files.com/APIs/gRPC-API/Reference/Messages/MFiles.ObjectVersionEx/index.md) | Information about objects that were also updated during the operation. (represented by ObjectVersionEx structs.) |
| `updated_objects[].version_info` | [`ObjectVersion`](https://developer.m-files.com/APIs/gRPC-API/Reference/Messages/MFiles.ObjectVersion/index.md) | Object Version information. |
| `updated_objects[].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. |
| `updated_objects[].version_info.display_version` | `string` | The version label to show, if it differs from the version number; empty otherwise. |
| `updated_objects[].version_info.title` | `string` | The title (name) of the object in this version. |
| `updated_objects[].version_info.is_single_file_object` | `bool` | True if the object is a single-file document, which has exactly one file. |
| `updated_objects[].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. |
| `updated_objects[].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. |
| `updated_objects[].version_info.has_assignments` | `bool` | True if relationships from one or more assignments to this object version exist. |
| `updated_objects[].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. |
| `updated_objects[].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`. |
| `updated_objects[].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. |
| `updated_objects[].version_info.class_id` | `int32` | The class ID of the version. |
| `updated_objects[].version_info.version_guid` | `string` | The GUID of this version. |
| `updated_objects[].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`. |
| `updated_objects[].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. |
| `updated_objects[].object_info` | [`ObjectLevelInfo`](https://developer.m-files.com/APIs/gRPC-API/Reference/Messages/MFiles.ObjectLevelInfo/index.md) | Object-level information. |
| `updated_objects[].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. |
| `updated_objects[].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). |
| `updated_objects[].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. |
| `updated_objects[].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. |
| `updated_objects[].object_info.checked_out_to_user_id` | `int32` | The ID of the user who has the object checked out. |
| `updated_objects[].object_info.checked_out_to_user_name` | `string` | The user name of the user who has the object checked out. |
| `updated_objects[].object_info.checked_out_to_host_name` | `string` | The host name of the computer to which the object was checked out. |
| `updated_objects[].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. |
| `updated_objects[].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. |
| `updated_objects[].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). |
| `updated_objects[].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. |
| `updated_objects[].object_info.guid` | `string` | The object GUID, in braces. The same value as `GetObjectGUID` returns. |
| `updated_objects[].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). |
| `updated_objects[].object_info.original_vault_guid` | `string` | The GUID of the vault in which the object was originally created. |
| `updated_objects[].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. |
| `updated_objects[].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. |
| `updated_objects[].object_info.external_repository_icon_id` | `string` | If not null, identifies the icon of the object. Currently applicable only to unmanaged objects. |
| `updated_objects[].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. |
| `updated_objects[].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

- [UndoCheckoutMultiple](https://developer.m-files.com/APIs/gRPC-API/Reference/MFiles.IRPCObjectOperations/UndoCheckoutMultiple/index.md): Undoes the check-out of several objects in one call.