Wrap your thread code in a test_request_context
so you have access to context locals:
@app.route('/my_endpoint', methods=['POST'])
def my_endpoint_handler():
#do tracking in sub-thread so we don't hold up the page
def handle_sub_view(req):
with app.test_request_context():
from flask import request
request = req
# Do Expensive work
thread.start_new_thread(handle_sub_view, (request))
return "Thanks"
Edit: it’s worth pointing out that the thread will have a different context than the original request. You need to extract any interesting request data, such as the user ID, before spawning the thread. You can then grab a (different) user object in the sub-thread using the ID.