如果类型为none，则格式化jinja2模板？

Question

I am attempting to display some information back to a user. A phone number from a string in a database. Each client has 3 phone numbers, cell, home, other. At least one will be filled out but the others can be null.

When I formatting the numbers in jinja I am getting an error for None type. Is there anyway to skip the formatting if the value is None? here is the code..

{% for entry in results %}

                                <div class="panel-heading">{{ entry.firstName }} {{ entry.lastName }}</div>
                                <div class="panel-body">
                                    <li>Email: {{ entry.email }}</li>
                                    <li>Cell Phone: {{ "%s-%s-%s" | format(entry.cellNum[0:3], entry.cellNum[3:6], entry.cellNum[6:10]) }}</li>
                                    <li>Home Phone: {{ entry.homeNum }}</li>
                                    <li>Other Phone: {{ entry.otherNum }}</li>
                                    <br>
                                    <form action="#" method="post" class="sky-form">
                                        <input type="hidden" value="{{ entry.id }}" name="firstname">
                                    <button type="submit" class="button">Select Client</button>
                                        </form>

Any thoughts?

Answer 1

how about

{% if entry.homeNum %}{{ entry.homeNum }}{% endif %}

test data before using.

Answer 2

Jinja can display None types as "None". So that shouldn't be the issue.

The issue is most likely this part:

{{ "%s-%s-%s" | format(entry.cellNum[0:3], entry.cellNum[3:6], entry.cellNum[6:10]) }}

if cellNum is None or undefined etc. this will not work as it tries to reference the value. so call a if on cellNum first.

{% if entry.cellNum %}{{ "%s-%s-%s" | format(entry.cellNum[0:3], entry.cellNum[3:6], entry.cellNum[6:10]) }}{% endif %}

Also, I'm assuming that all your entries in results is a valid value/object to do this with, you may want to check that too.