Django example of using Ajax for front and back interactions

The function of this article is to display the corresponding contents in the database on the page according to the options in the drop-down list. After selecting the options to exclude, the remaining options are submitted to the database.

In order to facilitate front and background interaction, GET and POST methods of Ajax are used to obtain and submit data respectively.

The code is as follows:

<!-- Populate the form content with the obtained data -->
<script>
$("#soft_id").change(function(){
var softtype=$("#soft_id").find("option:selected").text();
var soft={'type_id':softtype}
$.ajax( {
 type: 'GET',
 url:'/data/soft-filter/{{family}}',
 dataType: 'json',
 data:soft,
 success: function( data_get ){
 build_dropdown( data_get, $( '#min_version' ), ' Please select the lowest version ' );// Fill in the form 
 build_dropdown( data_get, $( '#max_version' ), ' Please select the highest version ' );
 build_div(data_get,$('#soft_affected'));
 }
 }); 
 });
 var build_dropdown = function( data, element, defaultText ){
 element.empty().append( '<option value="">' + defaultText + '</option>' );
 if( data ){
 $.each( data, function( key, value ){
 element.append( '<option value="' + key + '">' + value + '</option>' );
 } );
 }
 }
 var build_div = function( data, element){
 if( data ){
 element.empty();
 $.each( data, function( key, value ){
  element.append(' <li class="clearfix"> <div class="todo-check pull-left"><input name="chk" type="checkbox" value="'+value+'" /></div> <div class="todo-title">'+value+' </div><div class="todo-actions pull-right clearfix"><a href="#" rel="external nofollow" rel="external nofollow" rel="external nofollow" class="todo-complete"><i class="fa fa-check"></i></a><a href="#" rel="external nofollow" rel="external nofollow" rel="external nofollow" class="todo-edit"><i class="fa fa-edit"></i></a><a href="#" rel="external nofollow" rel="external nofollow" rel="external nofollow" class="todo-remove"><i class="fa fa-trash-o"></i></a></div> </li>');
 } );
 }
}
</script>

<!-- Select and submit the data -->
<script>
// Select data 
function postselect (){
  var seleitem=new Array();
 $("input[name='chk']").each(function(i){
 if(!($(this).is( ":checked" )) ){
  seleitem[i]=$(this).val();
  // alert(seleitem[i]); 
}
});
// Submit the excluded data to the background database 
var soft={'type_id':seleitem}
$.ajax( {
 type: 'POST',
 url:'/data/soft-submit',
 dataType: 'json',
 data:soft,
 success: function( data_get ){
 }
 });
}
</script>

Part of the html code is:

 <div style="overflow: hidden;" >
      <ul id='soft_affected' class="todo-list sortable">
      </ul>
 </div>

views. py request and response code for processing:

def soft_submit(request):
 if request.is_ajax():
  id=request.POST.get('type_id')
 return HttpResponse("success")
def soft_filter(request,fami):
 softtype=''
 ajax_release_version=[]
 release_version=[]
 if request.is_ajax():
  softtype=request.GET.get('type_id')
  soft_type=SoftTypeRef.objects.using('vul').filter(description=softtype)
  soft_tp_id=0
  for i in soft_type:
   soft_tp_id= i.soft_type_id
  web_soft=SoftWeb.objects.using('vul').filter(soft_type_id=soft_tp_id)
  for i in web_soft:
   ajax_release_ver=i.release_version
   ajax_release_version.append(ajax_release_ver)
  return HttpResponse(json.dumps(ajax_release_version), content_type='application/json')