将字典传递给视图，具有多个键：值对

Question

def status_(request,id):
    
    stages=['Vendor Quotation','Estimate Generation','Purchase Requsition','Purchase Order','Provision To Invoice','Reimbursement Invoice','Request Receipt#(PTI+RI+PO)','Receipt# Received(Updated PTI)','Request Sales Tax Invoice','Uploaded to Jazz Portal']    
    ctx={'invoice':Invoices.objects.get(pk=id),'stages':stages}
    return render(request,"Invoices/status.html",ctx)

Hi I am trying to pass multiple objects of data for displaying to the template for displaying, I am creating a ctx dictionary with multiple 2 key value pairs,second Key-value pair is array,when i access this array in by using

{% for idx in range(0,len(ctx.get("stages")) %}

I get following parsing error

**Could not parse the remainder: '(0,len(ctx.get("stages"))' from 'range(0,len(ctx.get("stages"))'**

Answer 1

You can not make function calls in Django templates with parameters, hence the above wiull not work, but likely you do not need this anyway, you can simply enumerate with:

{% for  %}
    {{ stage }}
{% endfor %}

If you really need to enumerate, then you can pass a range object through the context, but then probably a next problem pops up: you can not subscript with a variable either. It will require using a lot of extra template filters, making it very complicated. Templates are normally not used to implement business logic , therefore Django has a template engine that does not support complicated function calls, etc. to give the developer an incentive to move the business logic to the view.