Allowing tags with Google App Engine and Jinja2

Question

In my web app, the user can make blog posts. When I display the blog post, newlines aren\'t shown because I didn\'t replace the new lines with
tags.

Answer 1

Here's a filter wrote by myself:

import jinja2

@jinja2.evalcontextfilter
def nl2br(eval_ctx, value):
    result = jinja2.escape(value).unescape().replace('\n', '
')
    if eval_ctx.autoescape:
        result = jinja2.Markup(result)
    return result

And add the filter to the jinja2.Environment() by calling:

jinja_env.filters['nl2br'] = nl2br