[FIXED] Blueprints in Flask "Attribute 'function' object has no attribute 'name'

Issue

Problem Description

Getting error message when trying to start Flask.

Traceback (most recent call last):
  File "./run.py", line 3, in <module>
    from app import app
  File "/home/xxxxxx/xxxx.xxxxxxx.com/ClientTracker/app/__init__.py", line 13, in <module>
    app.register_blueprint(admin)
  File "/home/xxxxx/xxxxx.xxxxxxx.com/ClientTracker/env/local/lib/python2.7/site-packages/flask/app.py", line 65, in wrapper_func
    return f(self, *args, **kwargs)
  File "/home/xxxxx/xxxxx.xxxxxxx.com/ClientTracker/env/local/lib/python2.7/site-packages/flask/app.py", line 958, in register_blueprint
    if blueprint.name in self.blueprints:
AttributeError: 'function' object has no attribute 'name'

This is a migration from a simpler hierarchy implementing Blueprints. I'm splitting out the function of the frontend and the admin panel.

I built this step by step and had both sides working fine. Started migrating (functions and routes). After moving some code, I started getting an error message (basically the same as above, but different line).

Troubleshooting

• Searched through related posts on stackO
• Initially it was complaining about the second route statement I had. I started removing code (rolling back) to what I (thought was) a known good state. However I continued to have issues.
• I have it down to the minimum code I believe I need but still getting errors.
• If I remove the registration in the init.py file, the frontend works perfectly.

Code

#ClientTracker/run.py
#!env/bin/python

from app import app
app.run(host='0.0.0.0', port=8080, debug=False)

---

#ClientTracker/app/__init__.py

# Import flask and template operators
from flask import Flask, render_template

# Define the WSGI application object
app = Flask(__name__)

# Import a module / component using its blueprint handler variable (mod_auth)
#from app.mod_auth.controllers import mod_auth as auth_module
from app.admin.views import admin
from app.client.views import client

# Register blueprint(s)
app.register_blueprint(admin)
app.register_blueprint(client)

---

#ClientTracker/app/admin/views.py
from flask import render_template, request, Blueprint
from app import app
import MySQLdb
import datetime

admin = Blueprint(
    'admin',
    __name__,
    url_prefix='/admin',
    template_folder='templates',
    static_folder='static'
)

@admin.route('/')
def admin():
    return "ok"

I'm out of ideas.

Solution

Ok, so as seems to happen, I spend an hour looking, another 15 mins composing a question and then after I hit post, I find the answer.

I found a post (https://github.com/pallets/flask/issues/1327) that had the answer.

Basically, you cannot have a function name with the same name as your Blueprint name. Seems obvious now, but certainly stumped me for a while.

In thinking about it, my original "working" state had a dummy function name serving the '/'. When I rolled back, I didn't roll back far enough.

Replaced def admin(): with def admin1(): (will fix this better in prod) and all worked.

I hope this post helps someone else. Please still feel free to comment. As always, the group is always smarter than the individual. Lastly, thanks for reading this far. :-)

Answered By - PerryDaPlatypus