Discuss with expertTry it for free
© 2026 Direct Cursus Technology L.L.C.

Cloud Functions Service, gRPC: FunctionService.Update

Written by
Updated at February 26, 2026

Updates the specified function.

gRPC request

rpc Update (UpdateFunctionRequest) returns (operation.Operation)

UpdateFunctionRequest

{
  "function_id": "string",
  "update_mask": "google.protobuf.FieldMask",
  "name": "string",
  "description": "string",
  "labels": "map<string, string>"
}

Field

Description

function_id

string

Required field. ID of the function to update.

To get a function ID make a FunctionService.List request.

update_mask

google.protobuf.FieldMask

Field mask that specifies which attributes of the function should be updated.

name

string

New name for the function.
The name must be unique within the folder.

Value must match the regular expression |[a-z][-a-z0-9]{1,61}[a-z0-9].

description

string

New description for the function.

The maximum string length in characters is 256.

labels

object (map<string, string>)

Function labels as key:value pairs.

Existing set of labels is completely replaced by the provided set, so if you just want
to add or remove a label, request the current set of labels with a FunctionService.Get request.

No more than 64 per resource. The maximum string length in characters for each value is 63. Each value must match the regular expression [-_./\@0-9a-z]*. The string length in characters for each key must be 1-63. Each key must match the regular expression [a-z][-_./\@0-9a-z]*.

operation.Operation

{
  "id": "string",
  "description": "string",
  "created_at": "google.protobuf.Timestamp",
  "created_by": "string",
  "modified_at": "google.protobuf.Timestamp",
  "done": "bool",
  "metadata": {
    "function_id": "string"
  },
  // Includes only one of the fields `error`, `response`
  "error": "google.rpc.Status",
  "response": {
    "id": "string",
    "folder_id": "string",
    "created_at": "google.protobuf.Timestamp",
    "name": "string",
    "description": "string",
    "labels": "map<string, string>",
    "http_invoke_url": "string",
    "status": "Status"
  }
  // end of the list of possible fields
}

An Operation resource. For more information, see Operation.

Field

Description

id

string

ID of the operation.

description

string

Description of the operation. 0-256 characters long.

created_at

google.protobuf.Timestamp

Creation timestamp.

created_by

string

ID of the user or service account who initiated the operation.

modified_at

google.protobuf.Timestamp

The time when the Operation resource was last modified.

done

bool

If the value is false, it means the operation is still in progress.
If true, the operation is completed, and either error or response is available.

metadata

UpdateFunctionMetadata

Service-specific metadata associated with the operation.
It typically contains the ID of the target resource that the operation is performed on.
Any method that returns a long-running operation should document the metadata type, if any.

error

google.rpc.Status

The error result of the operation in case of failure or cancellation.

Includes only one of the fields error, response.

The operation result.
If done == false and there was no failure detected, neither error nor response is set.
If done == false and there was a failure detected, error is set.
If done == true, exactly one of error or response is set.

response

Function

The normal response of the operation in case of success.
If the original method returns no data on success, such as Delete,
the response is google.protobuf.Empty.
If the original method is the standard Create/Update,
the response should be the target resource of the operation.
Any method that returns a long-running operation should document the response type, if any.

Includes only one of the fields error, response.

The operation result.
If done == false and there was no failure detected, neither error nor response is set.
If done == false and there was a failure detected, error is set.
If done == true, exactly one of error or response is set.

UpdateFunctionMetadata

Field

Description

function_id

string

ID of the function that is being updated.

Function

A serverless function. For details about the concept, see Functions.

Field

Description

id

string

ID of the function. Generated at creation time.

folder_id

string

ID of the folder that the function belongs to.

created_at

google.protobuf.Timestamp

Creation timestamp for the function.

name

string

Name of the function. The name is unique within the folder.

The string length in characters must be 3-63.

description

string

Description of the function.

The string length in characters must be 0-256.

labels

object (map<string, string>)

Function labels as key:value pairs.

No more than 64 per resource.

http_invoke_url

string

URL that needs to be requested to invoke the function.

status

enum Status

Status of the function.

  • CREATING: Function is being created.
  • ACTIVE: Function is ready to be invoked.
  • DELETING: Function is being deleted.
  • ERROR: Function failed.
Previous
Create
Next
Delete