Django-发出Ajax请求

Question

Im having a hard time figuring out how to integrate this ajax request into my view. I'm still learning how to integrate django with ajax requests.

My first question would be: Does the ajax request need to have its own dedicated URL?

In my case I am trying to call it on a button to preform a filter(Preforms a query dependent on what is selected in the template). I have implemented this using just django but it needs to make new request everytime the user preforms a filter which I know is not efficient.

I wrote the most basic function using JQuery to make sure the communication is there. Whenever the user changed the option in the select box it would print the value to the console. As you will see below in the view, I would to call the ajax request inside this view function, if this is possible or the correct way of doing it.

JQuery - Updated

$("#temp").change( function(event) {
    var filtered = $(this).val();
    console.log($(this).val());
    $.ajax({
        url : "http://127.0.0.1:8000/req/ajax/", 
        type : "GET", 
        data : { 
            'filtered': filtered
        }, 
        dataType: 'json',

        success: function(data){
            console.log(data)
        },
        error: function(xhr, errmsg, err){
            console.log("error")
            console.log(error_data)
        }
    });

Views.py

def pending_action(request):
    requisition_status = ['All', 'Created', 'For Assistance', 'Assistance Complete', 'Assistance Rejected']
    FA_status = RequisitionStatus.objects.get(status='For Assistance')

    current_status = 'All'
    status_list = []

    all_status = RequisitionStatus.objects.all()
    status_list = [status.status for status in all_status]

    # This is where I am handling the filtering currently
    if request.GET.get('Filter') in status_list: 
        user_req_lines_incomplete = RequisitionLine.objects.filter(Q(parent_req__username=request.user) & Q(status__status=request.GET.get('Filter')))
        current_status = request.GET.get('Filter')
    else:
        user_req_lines_incomplete = RequisitionLine.objects.filter(parent_req__username=request.user).exclude(status__status='Completed')

    user_reqs = Requisition.objects.filter(par_req_line__in=user_req_lines_incomplete).annotate(aggregated_price=Sum('par_req_line__total_price'),
                                                                                                header_status=Max('par_req_line__status__rating'))
    return render(request, 'req/pending_action.html', { 'user_reqs':user_reqs, 
                                                        'user_req_lines_incomplete':user_req_lines_incomplete, 
                                                        'requisition_status':requisition_status, 
                                                        'current_status':current_status,
                                                        'FA_status':FA_status}) 

def filter_status(request):
    status = request.GET.get('Filter')
    data = {
        'filtered': RequisitionLine.objects.filter(Q(parent_req__username=request.user) & Q(status__status=status)),
        'current_status': status
    }
    return JsonResponse(data)

Urls.py

path('pending/', views.pending_action, name='pending_action')

Answer 1

First: you have to divide your template to unchangeable part and the part that you want to modify with your filter.

Second: for your goal you can use render_to_string. See the followning link https://docs.djangoproject.com/en/2.1/topics/templates/#usage

code example (views.py):

cont = {
    'request': request, #important key-value
    'your_models_instances': your_models_instances
}
html = render_to_string('your_filter_template.html', cont)
return_dict = {'html': html}
return JsonResponse(return_dict)

In your js file you need to determine relative url "{% url 'name in yours url file'%}" And in success you need to add next line:

success: function(data){
  $(".filter-block").html(data.html);
}

i hope it will help you! Good luck!