Jinja: loop to create form fields with same name but the last character

Question

I am using Flask and I have a WTF form with 12 input fields named like sold_1, sold_2,..., sold_12.

I would like to generate these fields in Jinja using a loop like:

{% for r in range(1, 13) %}
   {{ form.sold_ }}{{ r }}
{% endfor %}

or a similar syntax, but it doesn't work.

I solved it in a quite convoluted way as follows:

{% set tmp = "sold_x" %}
{% for r in range(1, 13) %}
    {{ form[tmp | replace('x', r)] }}
{% endfor %}

but I wonder whether there is a cleaner way.

Thanks

@dirn: yes, it works casting the integer into a string like `{{ form['sold_' + r|string] }}`. Thanks — Libra, Jul 03 '15 at 08:36

score 2 · Accepted Answer · edited May 23 '17 at 11:46

2

You could use this:

{% for r in range(1, 13) %}
    {{ form.sold_ ~ r }}
{% endfor %}

or, if you want your input fields names to be sold_nr:

{% for r in range(1, 13) %}
    {{ 'sold_' ~ r }}
{% endfor %}

See this answer for more detail.

EDIT

Using the @dirn and @Libra sugestions the correct answer is:

{% for r in range(1, 13) %}
    {{ form['sold_' ~ r] }}
{% endfor %}

edited May 23 '17 at 11:46

Community

answered Jun 30 '15 at 10:11

doru

tried the first option but instead of giving the input fields it returns only the value of r. Instead it works when written as `{{ form['sold_' ~ r] }} and doesn't require to cast the integer into a string (see my comment to dirn's answer). Thanks – Libra Jul 03 '15 at 08:44

1 Answers1