如何更改django模板中的现有变量

Question

Newish to Django here and need some assistance. I have a bool variable empty=True. I passed the variable through views to my template successfully. In the template I have a while loop that includes an if/else statement. I need to be able to change my variable to False if it meets a condition in the if statement. Once I'm out of the loop there is another if/else statement to check in empty is True.

I can't seem to figure out how to change a variable in the template.

I did try a with statement to change the variable but it didn't work correctly for me because I have to end the with statement before the loop ends. Once the with statement ends, the variable reverts back to its' original value

Views - '''

def myProjects(request):
    user = request.user
    projects = Project.objects.all() #from db
    empty=True
    return render(request,'users/myProjects.html',locals())

''' Template - '''

<div class="row" id="main1">
  <div class="col-2"></div>
  <div class="col-9">
    <div>
      <h1>My Projects: </h1>
      {% for x in proj %}
        {% if x.creator.user == me %}
          <div class="media1">
            <img class="account-img" src="{{x.projectPicture.url}}">
            <div>
              <h5><strong>Project Name: {{x.projectName}}</strong></h5>
              <p>Project Type: {{x.projectType}}</p>
              <p>Creator: <a href="/allUsers?name1={{x.creator.user}}"> {{x.creator.user}} </a></p>
              <p class="text-muted small">Created: {{x.dateTime}}</p>
            </div>
          </div>
          {{empty=False}}
        {% else %}
          {{pass}}
        {% endif %}

      {% if empty==True %}
        <p>You do not have any projects</p>
      {% else %}
        {{pass}}
      {% endif %}
      {% endfor %}
    </div>
  </div>
</div>

{% endblock%}

'''

Answer 1

Setting variable values in templates is against Django's design philosophy. The template system is designed to separate logic from presentation and avoid being a programming language .

To achieve what you are trying to do, you could first filter the projects in the view, then use the for...empty tag. Your example would become something like the following:

{% for project in projects_created_by_me %}
  <p>Project Name: {{project.projectName}}</p>
{% empty %}
  <p>You do not have any projects</p>
{% endfor %}