How to call the id of the previous select

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I have two selects, one for division and the other for groups. When the division is selected it has to bring in the second only the groups that are part of that division. In the url variable that picks the json I called python according to my view, but instead of this 4 it has to be id of the one that was selected earlier. At this line:var url = "{% url 'register:all_json' 4 %}" ;

<script>
 $( document ).ready(function() {

        $("select#id_divisao").change(function() {
            if ($(this).val() == '') {
                $("select#id_grupos").html("<option>Selecione uma divisão</option>");
                $("select#id_grupos").attr('disabled', true);
            } else {
              var url = "{% url 'cadastro:all_json' 4 %}" ;
              $.getJSON(url, function(grupos) {

                    var options = '<option value="">Select uma divisão</option>';
                    for (var i = 0; i < grupos.length; i++) {
                        options += '<option value="' + grupos[i].pk + '">' + grupos[i].fields.grupo + '</option>';
                    }

                    $("select#id_grupos").html(options);
                    $("select#iid_grupos option:first").attr('selected', 'selected');
                });
            }
        });
   });
</script>

py views.:

def all_json_grupos(request, idDivisao):
    json_grupos = serializers.serialize("json",  Grupo.objects.filter(divisao_id=idDivisao))
    return HttpResponse(json_grupos)

I go through the url and show me the groups according to the division I put, I just need to make it work in select

javascript python ajax json django
  • 1

    Can take the value of the previous select by its name?

  • I’m picking by the id, because in the group table I have the division id

  • Well, once you get that id, the problem ( I see ) is how to inject it into the Django url.. Here’s an alternative.. var url = "{% url 'urlpattern_name' {id} %}". replace('{id}', seu_id); With this pass your id to string and then to getJSON.. Remember that Django has a class to serialize Jango objects for json.. a Jsonresponse

  • Thanks Marlysson, I was able to solve by adapting the method you sent me, thus: var url = "{% url 'cadastre:all_json' 4 %}". replace(4, $(this). val());

  • Oops, for nothing. I’m just going to put the suggestion as an answer, so other people can build on.

1 answer

2


Well, your problem as discussed in the comments is how to put the value of id that you are already able to capture from html.

For this you can make a "hack" creating a url of Django in simple string in javascript , replace the value you that and then pass to some function of js to make the calls.. Would look like this:

....código anterior

var url = "{% url 'cadastro:all_json' id %}".replace('id', $(this).val())
$.getJSON(url, function(grupos) {
    ....continue seu código
}

....continuação do código

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