CODEWITHSUNDEEP
pythondjangotemplates
monika kumari
monika kumari

Reputation: 39

Forloop.counter in Django

{% for each_item in item.artifacts %}
    {% if each_item.scanner_count > 0 and each_item.scanner_match > 0 %}
        {% if forloop.counter <= 5 %}
            <tr>
            <td>{{each_item.threat_name}}</td>
            </tr>
        {% else %}
            {% if forloop.last %}
                <p><b><i> {{ forloop.counter|add:"-5" }} rows were truncated. See full report for more details. </i></b></p>
            {% endif %}    
        {% endif %}
    {% else forloop.counter -=1 %}    
    {% endif %}
{% endfor %}

ERROR:Malformed template tag at line 171: "else forloop.counter -=1" I want to increment the counter only when if condition is successful. Dont know how to do it with forloop.counter. Goal is to print 5 rows of valid output(scanner count >0 and Scanner match >0)

Upvotes: 2

Views: 7867

Answers (2)

Raja Simon
Raja Simon

Reputation: 10305

You can use combination of add and forloop counter to achieve what you want to achieve. But remember you need to pass some variable (I've used rank here for kinda storing the increment variable in template.

views.py

rank = 0 
return render(request, "base.html", {"items": items, "rank": rank})

html

{% for each_item in items %}
    {% if each_item.scanner_count > 0 and each_item.scanner_match > 0 %}
      {% if forloop.counter|add:rank <= 5 %}
        <tr><td>{{each_item.threat_name}}</td></tr>
        <br>
      {% else %}
        {% if forloop.last %}
          <p><b><i> {{ forloop.counter|add:"-5" }} rows were truncated. See full report for more details. </i></b></p>
        {% endif %}
      {% endif %}
    {% endif %}
{% endfor %}

Upvotes: 2

Michael Hawkins
Michael Hawkins

Reputation: 2873

As other commenters have noted, you cannot make an assignment of the forloop.counter in the template, as that would be considered logic that should be in the view (controller). Remove the {% else forloop.counter -= 1 %} from your code and it should work as I think you intended. If not, either add logic in the object (context) being passed to the template or user other forloop attributes/variables as found in the Django documentation here: https://docs.djangoproject.com/en/3.0/ref/templates/builtins/#for

Upvotes: 0

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