CODEWITHSUNDEEP
pythonflask
arboc7
arboc7

Reputation: 5870

Flask render_template context is None within a Blueprint

I'm relatively new to Flask, but I'm already finding the need to use Blueprints. However, in my Blueprint, I'm trying to render a template, but getting an error.

When hooked up as a WSGI application (on Dreamhost), the render_template function returns this error:

File ".../app/ui/__init__.py", line 95, in index
response = make_response(render_template('index.html', **data))

File ".../flask/templating.py", line 123, in render_template
ctx.app.update_template_context(context)

AttributeError: 'NoneType' object has no attribute 'app'

However, when I call the app.py directly in debug mode it works perfectly! (below)

python app/app.py

In app.py:

if __name__ == '__main__':
    app.run(debug=True, host='0.0.0.0')

EDIT: Rendering template:

@ui_blueprint.route('/', methods=['GET'])
@ui_blueprint.route('/home', methods=['GET'])
def index():
    data = {
        'title': 'Index'
    }
    response = make_response(render_template('index.html', **data))
    return response

EDIT 2: ctx is:

Any ideas how I might fix this error? Thanks!

Upvotes: 2

Views: 3711

Answers (2)

arboc7
arboc7

Reputation: 5870

When setting up Flask, make sure that all dependencies are installed correctly. That's the problem in this case.

If running on mod_wsgi, also make sure that any reads or writes are directed to the proper location; otherwise, the app make work when run using app.run() but the paths change when using Apache.

Upvotes: 1

nerdfiles
nerdfiles

Reputation: 1

Make sure that you are importing all the right modules:

from flask import Flask, render_template, make_response, request, Response

And you may want to create a wrapper for your view.

Upvotes: 1

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