Flask: passing around background worker job (rq, redis)

Question

I want to do a very simple thing: Launch a worker to something and then return the answer to user. I\'m trying to do so using a combination of Flask and RQ.

impo         


        

Answer 1

Problem with serializing arguments (you actually trying to serialize function object which is impossible with pickle).

Try

@app.route('/make/')
def make():
    job = q.enqueue(func=do_something, args=('argument',))
    session['job'] = job
    return 'Done'

Answer 2

I've not used rq before but I see that a job has a .key property. It might be easier to store that hash in your session. Then you can use the Job class's .fetch method which will itself call a .refresh() and return the job to you. Reading the .result() at that point would give you the job's current status.

Maybe like this (untested):

from rq.job import Job

@app.route('/make/')
def make():
    job = q.enqueue(do_something, 'argument')
    session['job'] = job.key
    return 'Done'

@app.route('/get/')
def get():
    try:
        job = Job()
        job.fetch(session['job'])
        out = str(job.result)
    except:
        out = 'No result yet'
    return out