As part of a Atlassian merge+migration where we needed to have all _old_ useraccounts manually migrate their content to _new_ user accounts, to then have the whole instance merged, I didn't want to go through 300 pages of updates. So I wrote this.

migrate_ownership.py

from tqdm.auto import tqdm
from requests.exceptions import HTTPError
from getpass import getpass
import os

from atlassian import Confluence

def get(label):
    if label not in os.environ:
        os.environ[label]=getpass(f'Enter {label}')
    return os.environ[label]


confluence = Confluence(
     url=get('url'), #https://example.atlassian.net/'
     username=get('user_name'), # andrew.bolster@example.com
     password=get('api_key'), # from https://id.atlassian.com/manage-profile/security/api-tokens
     cloud=True
)

user = confluence.get('/rest/api/user/current')
ids = [result['user']['accountId'] for result in confluence.get('/rest/api/search/user', params={'cql':f"type=user and user = '{user['displayName']}'"})['results']]
assert len(ids) == 2, 'Surprising number of IDs, braking'
lookup = {ids[0]:ids[1], ids[1]:ids[0]} # this is a lazy double-mapping; presuming that the 'order' is 'whomever I am, make the owner the other one'

new_owner_id = lookup[user['accountId']]

def update_page_owner(page, new_owner_id):
    page_detail = confluence.get(f"api/v2/pages/{page['id']}", params={'body-format':'storage'})

    data={
        'id':page['id'],
        'status':page['status'],
        'title':page['title'],
        'ownerId': new_owner_id,
        'body': {k:v for k,v in page_detail['body']['storage'].items() if k in ['value','representation','storage','atlas_doc_format','wiki']},
        'version':{'number': confluence.get(f"rest/api/content/{page['id']}")['version']['number']+1,
                   'message': 'Automatic Owner Transformation',
                   'minorEdit': True}
        }
    
    return confluence.put(f"api/v2/pages/{page['id']}", data=data, advanced_mode=True)
    
    
while (owned_pages:= confluence.get('/rest/api/search', params={'cql':'type=page AND owner=currentUser()'})['results']):
    for page in (pbar:= tqdm(owned_pages)):
        try:
            pbar.set_description(page['title'])
            update_page_owner(page['content'], id_lookup[page['authorId']])
        except HTTPError as e:
            print(f"Failed with {e} on {page['title']}; {confluence.url}{page['content']['_links']['webui']}")
        except:
            raise