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{% load i18n %}</td></tr>
<tr>
<td>{% trans "State" context "Region" %}</td>
<td>
<select id='current-state'>
<option value=''>--------</option>{% for state in states %}
<option value='{{state.number}}'{% if state.number == selected_state %}selected='selected'{% endif %}>{{state}}</option>
{% endfor %}</select>
</td>
</tr>
<tr>
<td>{% trans "Department" %}</td>
<td>
<select id='current-department'>
</select>
</td>
</tr>
<tr class='required'>
<th><label>{% trans "Town" %}</label></th>
<td><input{{attrs_select}}/>
<input type="hidden"{{attrs_hidden}}/>
<script type="text/javascript"><!--//
selected_department = "{{selected_department}}";
var empty_select = "<option value=''>--------</option>";
function update_department_field(){
var selected_state = $("#current-state").val();
if (!selected_state){
$("#current-department").html("<option value=''>"+"{% trans 'Choose a state first' %}"+"</option>");
$("#current-department").prop('disabled', true);
$('#id_select_{{field_id}}').prop('disabled', true);
return;
}
$.ajax({
url: "{% url 'department-by-state' %}" + selected_state,
type: 'get',
dataType: 'json',
success: function(data) {
var html = "";
for (idx in data){
dpt = data[idx];
html += "<option value='" + dpt.number + "'";
if (String(dpt.number) == String(selected_department)){
html += " selected='selected'";
}
html += ">" + dpt.value + "</option>";
}
$("#current-department").html(html);
$("#current-department").prop('disabled', false);
update_search_town();
}
});
}
function update_search_town(){
selected_department = $("#current-department").val();
if (selected_department){
$("#id_select_{{field_id}}").autocomplete( "option", "source", {{source}}+selected_department);
$('#id_select_{{field_id}}').prop('disabled', false);
} else {
$('#id_select_{{field_id}}').prop('disabled', true);
}
}
function empty_town(){
$('#id_{{field_id}}').val(null);
$('#id_select_{{field_id}}').val(null);
}
$(function() {
update_department_field();
$("#current-state").change(function(){
empty_town();
update_department_field();
});
$("#current-department").change(function(){
empty_town();
update_search_town();
});
$("#id_select_{{field_id}}").autocomplete({
source: {{source}},
select: function( event, ui ) {
if(ui.item){
$('#id_{{field_id}}').val(ui.item.id);
} else {
$('#id_{{field_id}}').val(null);
}
},
minLength: 2{% if options %},
{{options}}
{% endif %}
});
$(document).on("click", '#id_select_{{field_id}}', empty_town);
});//--></script>
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