populate a select box from a another select box and using database connection

Question

I have two select boxes: one is country and the other one is cities. When the user selects a country, the appropriate cities for that country should be populated in the "cities" from the database.

I am new to jquery and javascript and i am not sure how to implement this. It will be appreciated if someone gives me a sample code for performing this functionality. I have no idea and i am pretty much stuck as i am new to the scripting languages.

I am using this in one of my forms in django framework which is implemented in python.

Thank you in advance

<!DOCTYPE html>
<html>
<head>
  <style>
  div { color:red; }
  </style>
  <script src="http://code.jquery.com/jquery-latest.js"></script>
</head>
<body>
  <select name="country" id="country">
    <option value = "india">india</option>
    <option value = "USA">USA</option>
    <option value = "UK">UK</option>
    <option value = "China">China</option>
    <option value = "Sweden">Sweden</option>
    <option value = "Germany">Germany</option>
  </select>

  <select name="cities" id="cities">
  <option value = ""></option>
  </select>  
  <div></div>  

</body>
</html>

Answer 1

Try this:

In your template

 $('#country').change(function() { 
    var value = $(this).attr('value'); 
    var request = $.ajax({
        url: "/getcities/",
        type: "GET",
        data: {country : value},
        dataType: "json",

        success: function(data) {
         //Popluate combo here by unpacking the json
        }
    });


});

In your view:

def getcities(request)
    if request.method == "GET":
        country = request.GET["country"]
        cities = Cities.objects.filter(country=country)
        results = [{'city': str(city.name), 'id':city.id} for city in cities]
        json = simplejson.dumps(results)
        return HttpResponse(json, mimetype='application/json')

You will have to map the url /getcities/ to your view in urls.py.

populate a select box from a another select box and using database connection

Question

1 answers

solution1
0 ACCPTED 2012-08-07 09:15:11

populate a select box from a another select box and using database connection

Question

1 answers

solution1 0 ACCPTED 2012-08-07 09:15:11

solution1
0 ACCPTED 2012-08-07 09:15:11