ajax - JQuery concatenate values as they are selected from a dropdown list -

the idea user selects users dropdown list send them email. when new user selected, email address of user needs concatenated others using format: 'user1@mail.com','user2@mail.com','user3@mail.com' format needed because use django , format recipient list.

right can bring email address of user selected using ajax can´t concatenate in way need, have:

forms.py  class myform(forms.form):     userslist = forms.modelchoicefield(queryset = user.objects.filter(here goes condition show users), empty_label='list of users', label='users', required=false)     emailaddress = forms.charfield(max_length=1000, label='send to:', required=false)     comment = forms.charfield(widget=ckeditoruploadingwidget(), label="comment:") 

now ajax view

views.py  class mails(templateview):     def get(self, request, *args, **kwargs):         id_user = request.get['id']         = user.objects.filter(id = id_user)         data = serializers.serialize('json', us, fields=('email'))         return httpresponse(data, content_type='application/json') 

and jquery:

<script>     $('#id_userlist').on('change', concatenate);     function concatenate() {         var id = $(this).val();         $.ajax({             data: { 'id': id },             url: '/the_url_to_get_data/',             type: 'get',             success: function (data) {                 var mail = ""                 (var = 0; < data.length; i++) {                     mail += data[i].fields.email                     $('#id_emailaddress').val(mail)                 }             }         })     } </script> 

how can concatenate values in nedded format?

if need more info please let me know.

use .join concatenate array elements separator. , use .map extract email each element of data.

success: function(data) {     var mail = data.map(function(el) {         return el.fields.email;     }).join(',');     $("#id_emailaddress").val(email); }