CODEWITHSUNDEEP
pythonflaskjinja2
Jacob Bennett
Jacob Bennett

Reputation: 67

How to make a filter to check if someone has tagged a user with @?

I am making a social networking site. I am wondering how to make a jinja filter in python to make any word that starts with @ a link to their profile.

Upvotes: 1

Views: 172

Answers (1)

nathancahill
nathancahill

Reputation: 10850

Here's a Jinja filter you can use:

from flask import Markup

def linkify(text):
    return Markup(re.sub(r'@([a-zA-Z0-9_]+)', r'<a href="/\1">@\1</a>', text))

It finds usernames starting with @, containing lowercase or uppercase letters, numbers and underscores. It replaces it a link to the profile (\1 represents their username without the @)

Here's how you'd add it to you're environment:

 app.jinja_env.filters['linkify'] = linkify

And call it from a Jinja template:

{{ post|linkify }}

EDIT

Run this in a Python shell:

>>> import re
>>> text = 'This is a post mentioning @nathancahill and @jacob_bennet'
>>> re.sub(r'@([a-zA-Z0-9_]+)', r'<a href="/\1">@\1</a>', text)
'This is a post mentioning <a href="/nathancahill">@nathancahill</a> and <a href="/jacob_bennet">@jacob_bennet</a>'

Do you get the same output?

Upvotes: 2

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