Template helpers vs global context processing in Flask.

app.py

# Discussing Flask templating with Hazel|work on #pocoo.
# Mixing request args and view func args in a template.
# Re: http://pastebin.com/Jr8ZUb25

from flask import Flask, request, render_template


app = Flask(__name__)


def get_endpoint_args(request):
    "Given a Flask request, return combination of request & view func args."
    endpoint_args = dict()
    if request.view_args:
        endpoint_args.update(request.view_args)
    if request.args:
        endpoint_args.update(request.args)
    return endpoint_args


@app.context_processor
def add_template_helpers():
    # You could simply inject the result of get_endpoint_args.
    # But in my experience, it's easier to read templates which use functions
    # and filters than to inject variables into the global context.
    #
    # This is especially important for helper functions or context variables
    # which require a lot of work, as the context processor is run on each call
    # to render_template.
    return dict(get_endpoint_args=get_endpoint_args)