Question

The Tumblelog app on the MongoDB site does not work .

I’ve followed the example absolutely and I get a 404 error when I run it in my local host. I’m using Eclipse Indigo (3.7.2) with pyDev on Ubuntu 12.0.4.

I’m not sure if it’s because of the register_blueprints, which I included in the __init__.py

I did it like this as in the tutorial:

from flask import Flask
from flask.ext.mongoengine import MongoEngine

app = Flask(__name__)
app.config["MONGODB_DB"] = "my_tumble_log"
app.config["SECRET_KEY"] = "KeepThisS3cr3t"

db = MongoEngine(app)


if __name__ == '__main__':
    app.run()


    def register_blueprints(app):
    # Prevents circular imports
        from tumblelog.views import posts
        app.register_blueprint(posts)
    register_blueprints(app)

Otherwise I have followed the tutorial exactly.

Answer 1

register_blueprints is never called – app.run blocks until you kill the script (at which point there is no point to adding routes).

Change the order and everything will run:

def register_blueprints(app):
# Prevents circular imports
    from tumblelog.views import posts
    app.register_blueprint(posts)

register_blueprints(app)

if __name__ == '__main__':
    app.run()

regist_blueprints is not actually preventing circular imports – the pattern to avoid circular imports is to create the app in a different file and import both app and blueprint into a third file to run everything:

#  application.py
from flask import Flask  # etc.

app = Flask("your_package_name")

 

# tumblelog/views.py
from flask import Blueprint, current_app  # etc.

posts = Blueprint("tumblelog")

@posts.route("/")
def index():
    # use current_app rather than app here

 

# run_server.py (use the same pattern for .wsgi files)
from application import app
from tumblelog.views import posts

app.register_blueprint(posts)

if __name__ == "__main__":
    app.run()