Django template language if tag not working-CodePudding

I have a django template with an update form, for an invoices application. I want to allow to update the record after it was saved.
One of the model fields is manager which is a foreign key:

class Invoice(models.Model):
    manager = models.ForeignKey(User, on_delete=models.CASCADE,null=True ,blank=True)

The problem is that I don't to display the manager's user id, but his/her first name, so I want to populate the select tag with all manager's first name. I have tried this:

<select id="id_manager" name="manager">
   {% for manager in managers %}
     {{ manager }} || {{ initial_manager }}
     {% if manager == initial_manager %}
          <option value="{{ manager.user.id }}" selected>{{ manager.user.first_name }}</option>
     {% else %}
          <option value="{{ manager.user.id }}">{{ manager.user.first_name }}</option>
     {% endif %}
  {% endfor %}
</select>

This is the views.py part:

managers = Profile.objects.filter(Q(role = 'manager') | Q(role = 'cfo') | Q(role = 'ceo') | Q(role = 'sec'))
projects = Project.objects.all()
form = InvoiceForm(instance = invoice)
initial_manager = invoice.manager
return render(request, "invoice/update.html", {'form': form, 'managers':managers, 'projects':projects, 'initial_manager':initial_manager})

I have added this to see the values of the variables:

{{ manager }} || {{ initial_manager }}

and I see for example " 102 || 102 ", which means that they are equal but the if part doesn't run, it always goes to the else part. It doesn't matter what I've tried, I have tried passing initial_manager as a string, comparing manager to " 102 " or to "102" or 102, but nothing works.
Can someone help me?

CodePudding user response：

if both are the same value but it's returning false when using if then try modify the code to make them both float using floatformat for your case

 {% if manager|floatformat:"0" == initial_manager|floatformat:"0" %}
      <option value="{{ manager.user.id }}" selected>{{ manager.user.first_name }}</option>
 {% else %}
      <option value="{{ manager.user.id }}">{{ manager.user.first_name }}</option>
 {% endif %}

this will make them both float with 0 decimal so it's like converting them into an integer. see this also

CodePudding user response：

Thanks for the help. I've used stringformat instead of floatformat.

<select id="id_manager" name="manager">
   {% for manager in managers %}
   {{ manager }} || {{ initial_manager }}
   {% if manager|stringformat:'s' == initial_manager|stringformat:'s' %}
        <option value="{{ manager.user.id }}" selected>{{ manager.user.first_name }}</option>
   {% else %}
        <option value="{{ manager.user.id }}">{{ manager.user.first_name }}</option>
   {% endif %}
 {% endfor %}
</select>

Now it works. I appreciate your help