I've recently been struggling to deploy my Flask app to AWS ElasticBeanstalk. I'm fairly new to web projects and AWS so every day is a struggle. Every once in a while I deploy my project to EB (I have been able to solve problems in the past) but since I restructured my app from a monolithic application.py to a more structured approach, I've been struggling. The deployment itself has succeeded but I'm faced with a 500 error. The log says:
[Wed Apr 19 00:11:57.895790 2017] [:error] mod_wsgi (pid=15947): Target WSGI script '/opt/python/current/app/app/members/views.py' cannot be loaded as Python module.
[Wed Apr 19 00:11:57.895846 2017] [:error] mod_wsgi (pid=15947): Exception occurred processing WSGI script '/opt/python/current/app/app/members/views.py'.
[Wed Apr 19 00:11:57.895865 2017] [:error] Traceback (most recent call last):
[Wed Apr 19 00:11:57.895881 2017] [:error] File "/opt/python/current/app/app/members/views.py", line 14, in
[Wed Apr 19 00:11:57.895903 2017] [:error] @application.route('/')
[Wed Apr 19 00:11:57.895909 2017] [:error] File "/opt/python/run/venv/lib/python2.7/site-packages/flask/app.py", line 1080, in decorator
[Wed Apr 19 00:11:57.895921 2017] [:error] self.add_url_rule(rule, endpoint, f, **options)
[Wed Apr 19 00:11:57.895935 2017] [:error] File "/opt/python/run/venv/lib/python2.7/site-packages/flask/app.py", line 64, in wrapper_func
[Wed Apr 19 00:11:57.895944 2017] [:error] return f(self, *args, **kwargs)
[Wed Apr 19 00:11:57.895949 2017] [:error] File "/opt/python/run/venv/lib/python2.7/site-packages/flask/app.py", line 1051, in add_url_rule
[Wed Apr 19 00:11:57.895956 2017] [:error] 'existing endpoint function: %s' % endpoint)
[Wed Apr 19 00:11:57.895969 2017] [:error] AssertionError: View function mapping is overwriting an existing endpoint function: index
My apps structure is:
myApp/
runServer.py
requirements.txt
app/
__init__.py
config.py
static/
members/
__init__.py
views.py
models.py
templates/
My .ebextensions/<env-name>.config contains:
option_settings:
"aws:elasticbeanstalk:container:python":
WSGIPath: app/members/views.py
Lastly, my views.py file contains all my url routings. I have made sure all of the function names are the same.
Does anybody know what kind of problem/solution I'm looking at? Is there any more info I can provide to help?
Thanks!
Edit: Changing my def index() function in views.py to def newFunctionForTesting() yields AssertionError: View function mapping is overwriting an existing endpoint function: newFunctionForTesting
Edit 2: It may be similar to this one, but in that case the proposed solution was to write everything in a single file, which isn't the approach I was looking for... Maybe Blueprints could work better...
Edit 3: Here's what my app looks like.
app\__init__.py
from flask import Flask, flash, request
from urlparse import urlparse, urljoin
from urllib2 import urlopen
from flask_user import SQLAlchemyAdapter, UserManager, current_user
import os
from apscheduler.schedulers.background import BackgroundScheduler
import pandas as pd
from app.members.models import db, User, AcademicData, Role, UserRoles, Query
from passlib.hash import bcrypt
import datetime
import json
# Initializes application
application = Flask(__name__)
application.config.from_object("app.config.Config")
# Initializes db
db.init_app(application)
# Registers user model with db
with application.app_context():
db.create_all() # Creates tables defined
db_adapter = SQLAlchemyAdapter(db, User) # Register the User model
@application.before_first_request
def initialize():
scheduler = BackgroundScheduler()
scheduler.start()
scheduler.add_job(updateData, trigger = "interval", days = 1)
def updateData():
...
@application.context_processor
def injectFunction():
def getDataTable(id):
...
import members.views
# Initialize flask-user
user_manager = UserManager(db_adapter, application,register_view_function = members.views.protected_register)
app\members\views.py
from flask import redirect, url_for, render_template, request
from flask_user import login_required, roles_required, views as user_views
from app import application, SITE_ROOT
import json
import os
import pandas as pd
@application.route('/')
def index():
"""
Index view. Currently the dashboard.
:return:
"""
return redirect(url_for('dashboard'))
@application.route('/dashboard')
@login_required
def dashboard():
...
return render_template('dashboard.html')
@application.route('/table')
@login_required
def table():
return render_template('table.html')
@application.errorhandler(404)
def not_found(error):
return render_template('404.html')
@application.errorhandler(500)
@application.errorhandler(503)
def server_error(error):
return render_template('503.html')
@roles_required('admin')
def protected_register():
return user_views.register()