Question

I’m trying to loop through objects from my database in the template and one of the things I want to display is the difference between two of the fields in the table. Is there a clean way to do this:

{% for game in games %}
<tr>
    <td width=100><p>{{ game.name }} </p></td>
    <td width=300><p>{{ game.campaign }} </p></td>
    <td width=90><p>{{ game.num_Players }} </p></td>
    <td width=90><p>{{ game.num_Players - game.accepted_Characters }}</p></td>
    <td width=90><p>{{ game.standing_Requests }}</p></td>
</tr>
{% endfor %}

? Where game is a table object with all those fields.

Answer 1

Django templates are designed not to do computation. You should adjust your games list in the view, then display it in the template:

# views.py
for game in games:
    game.chars_diff = game.num_Players - game.accepted_Characters


# template.html
<td><p>{{ game.chars_diff }}</p></td>