Add delete functions for jobs and users.

app/auth/views.py

@@ -1,10 +1,14 @@
-from flask import flash, redirect, render_template, request, url_for
+from flask import (flash, redirect, render_template, request, url_for,
+                   current_app)
 from flask_login import current_user, login_required, login_user, logout_user
 from . import auth
 from .. import db
-from .forms import ChangePasswordForm, LoginForm, PasswordResetForm, PasswordResetRequestForm, RegistrationForm, EditProfileForm
+from .forms import (ChangePasswordForm, LoginForm, PasswordResetForm,
+                    PasswordResetRequestForm, RegistrationForm, EditProfileForm)
 from ..email import send_email
 from ..models import User, Job
+import logging
+import threading
 
 
 @auth.route('/login', methods=['GET', 'POST'])
@@ -165,8 +169,30 @@ def settings():
 @auth.route('/settings/delete_self', methods=['GET', 'POST'])
 @login_required
 def delete_self():
-    user = current_user
-    db.session.delete(user)
+    logger = logging.getLogger(__name__)
+
+    def background_delete(app, current_user_id):
+        with app.app_context():
+            logger.warning('Called by delete_thread.')
+            logger.warning('User id is: {}.'.format(current_user_id))
+            jobs = Job.query.join(User).filter_by(id=current_user_id).all()
+            logger.warning('Jobs to delete are: {}'.format(jobs))
+            for job in jobs:
+                job.flag_for_stop()
+                logger.warning('Job status: {}'.format(job.status))
+                deleted = False
+                while deleted is False:
+                    db.session.refresh(job)
+                    if job.status == 'deleted':
+                        logger.warning('Job status is deleted.')
+                        job.delete_job()
+                        deleted = True
+
+    delete_thread = threading.Thread(target=background_delete,
+                                     args=(current_app._get_current_object(),
+                                           current_user.id))
+    delete_thread.start()
+    db.session.delete(current_user)
     db.session.commit()
     flash('Your account has been deleted!')
     return redirect(url_for('main.index'))