Here’s how: use a FileSystemLoader instead of a PackageLoader. I found examples on the web here and here. Let’s say you have a python file in the same dir as your template: ./index.py ./template.html This index.py will find the template and render it: #!/usr/bin/python import jinja2 templateLoader = jinja2.FileSystemLoader(searchpath=”./”) templateEnv = jinja2.Environment(loader=templateLoader) TEMPLATE_FILE = “template.html” … Read more
You can use {{ variable }} anywhere in your template, not just in the HTML part. So this should work: <html> <head> <script> var someJavaScriptVar=”{{ geocode[1] }}”; </script> </head> <body> <p>Hello World</p> <button onclick=”alert(‘Geocode: {{ geocode[0] }} ‘ + someJavaScriptVar)” /> </body> </html> Think of it as a two-stage process: First, Jinja (the template engine … Read more
I found the answer. Cast integer to string: myOldIntValue|string Cast string to integer: myOldStrValue|int
For those using Flask, put this in your __init__.py: def clever_function(): return u’HELLO’ app.jinja_env.globals.update(clever_function=clever_function) and in your template call it with {{ clever_function() }}
Use the none test (not to be confused with Python’s None object!): {% if p is not none %} {{ p.User[‘first_name’] }} {% else %} NONE {% endif %} or: {{ p.User[‘first_name’] if p is not none else ‘NONE’ }} or if you need an empty string: {{ p.User[‘first_name’] if p is not none }}
There are two ways to do it. The direct approach would be to simply call (and print) the strftime() method in your template, for example {{ car.date_of_manufacture.strftime(‘%Y-%m-%d’) }} Another, sightly better approach would be to define your own filter, e.g.: from flask import Flask import babel app = Flask(__name__) @app.template_filter() def format_datetime(value, format=”medium”): if format … Read more
You want your if check to be: {% if not loop.last %} , {% endif %} Note that you can also shorten the code by using If Expression: {{ “, ” if not loop.last else “” }}
To turn off autoescaping when rendering a value, use the |safe filter. {{ something|safe }} Only do this on data you trust, since rendering untrusted data without escaping is a cross-site scripting vulnerability.
The counter variable inside the loop is called loop.index in Jinja2. >>> from jinja2 import Template >>> s = “{% for element in elements %}{{loop.index}} {% endfor %}” >>> Template(s).render(elements=[“a”, “b”, “c”, “d”]) 1 2 3 4 In addition to loop.index, there is also loop.index0 (index starting at 0) loop.revindex (reverse index; ending at 1) … Read more
Yes, it’s possible to use inline if-expressions: {{ ‘Update’ if files else ‘Continue’ }}