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

In your model object, add a function like this:

class Post(db.Model):
    # ...

    def html_content(self):
        # Escape, then convert newlines to br tags, then wrap with Markup object
        # so that the 
 tags don't get escaped.
        def escape(s):
            # unicode() forces the conversion to happen immediately,
            # instead of at substitution time (else 
 would get escaped too)
            return unicode(jinja2.escape(s))
        return jinja2.Markup(escape(self.content).replace('\n', '
'))

Then in your template, just call that:

{{ post.html_content() }}