Unset a label field on a file

This page describes how to unset a label Field on a single Google Drive file.

To remove metadata from a file by unsetting a file label, use the files.modifyLabels method. The request body contains an instance of ModifyLabelsRequest to modify the set of labels on a file. The request might contain several modifications that are applied atomically. That is, if any modifications aren't valid, then the entire update is unsuccessful and none of the (potentially dependent) changes are applied.

The ModifyLabelsRequest contains an instance of LabelModification which is a modification to a label on a file. It might also contain an instance of FieldModification which is a modification to a label's field. To unset the values for the field, set FieldModification.unsetValues to True.

If successful, the response body contains the labels added or updated by the request. These exist within a modifiedLabels object of type Label.

Example

The following code sample shows how to use the fieldId and labelId to unset the field values on the associated fileId. For example, if a label contains both text and user fields, unsetting the text field removes it from the label but leaves the user field untouched. Whereas removing a label deletes both the text and user fields associated with the label. For more information, see Remove a label from a file.

LabelFieldModification fieldModification =
  new LabelFieldModification().setFieldId("FIELD_ID").setUnsetValues(true);

ModifyLabelsRequest modifyLabelsRequest =
  new ModifyLabelsRequest()
      .setLabelModifications(
          ImmutableList.of(
              new LabelModification()
                .setLabelId("LABEL_ID")
                .setFieldModifications(ImmutableList.of(fieldModification))));

ModifyLabelsResponse modifyLabelsResponse = driveService.files().modifyLabels("FILE_ID", modifyLabelsRequest).execute();

field_modification = {'fieldId':'FIELD_ID','unsetValues':True}
label_modification = {'labelId':'LABEL_ID', 'fieldModifications':[field_modification]}

modified_labels = drive_service.files().modifyLabels(fileId="FILE_ID", body = {'labelModifications' : [label_modification]}).execute();

/**
* Unset a label with a field on a Drive file
* @return{obj} updated label data
**/
async function unsetLabelField() {
  // Get credentials and build service
  // TODO (developer) - Use appropriate auth mechanism for your app

  const {GoogleAuth} = require('google-auth-library');
  const {google} = require('googleapis');

  const auth = new GoogleAuth({scopes: 'https://www.googleapis.com/auth/drive'});
  const service = google.drive({version: 'v3', auth});
  const fieldModification = {
    'fieldId': 'FIELD_ID',
    'unsetValues': True,
  };
  const labelModification = {
    'labelId': 'LABEL_ID',
    'fieldModifications': [fieldModification],
  };
  const labelModificationRequest = {
    'labelModifications': [labelModification],
  };
  try {
    const updateResponse = await service.files.modifyLabels({
      fileId: 'FILE_ID',
      resource: labelModificationRequest,
    });
    return updateResponse;
  } catch (err) {
    // TODO (developer) - Handle error
    throw err;
  }
}

Replace the following:

• FIELD_ID: The fieldId of the field to modify. To locate the fieldId, retrieve the label using the Google Drive Labels API.
• LABEL_ID: The labelId of the label to modify.
• FILE_ID: The fileId of the file for which the labels are modified.