[FIX] celery context (#445)

* try to remove multiple app contexts

* attempt #2 to fix

* update/fix task

* use actual celery app for task

compose/neurosynth_compose/core.py

@@ -1,3 +1,8 @@
+from flask_celeryext import FlaskCeleryExt
+
 from .__init__ import create_app
 
 app = create_app()
+
+ext_celery = FlaskCeleryExt(app)
+celery_app = ext_celery.celery

compose/neurosynth_compose/requirements.txt

@@ -6,6 +6,7 @@ connexion[swagger-ui]~=2.13
 email-validator~=1.1
 flake8~=3.8
 flask~=2.0
+Flask-CeleryExt~=0.5
 flask-cors~=3.0
 flask-dance~=3.2
 flask-shell-ipython~=0.4

compose/neurosynth_compose/resources/tasks.py

@@ -1,16 +1,12 @@
 import os
 from pathlib import Path
 
-from celery import Celery
+from flask import current_app as app
 
-from ..__init__ import create_app
+from ..core import celery_app
 from ..database import db
 from ..models import NeurovaultFile
 
-app = create_app()
-celery_app = Celery(app.import_name)
-app.app_context().push()
-
 
 @celery_app.task(name="neurovault.upload", bind=True)
 def file_upload_neurovault(self, fpath, id):
@@ -40,7 +36,7 @@ def file_upload_neurovault(self, fpath, id):
             record.collection_id,
             fpath,
             # https://github.com/NeuroVault/NeuroVault/blob/e3dc3c7767af12a3a7574eda64dcc9b749da8728/neurovault/apps/statmaps/models.py#LL1409C5-L1421C6
-            modality="Other",  # no good way to determine if all inputs were of the same modality
+            modality="Other",  # no good way to determine if all inputs were the same modality
             # models.CharField(choices=
             # [
             # ('T', 'T map'),