视图.py
下面我们接收一个 AJAX POST 并根据“VarID”过滤一个对象,并构建一个字典列表,每个字典都包含一个 OptionID、OptionValue 和 OptionLabel 值。最后,您应该在 json 中转换您想要的任何列表或字典或组合。
def currentoptions(request):
if request.is_ajax():
currentOptions = Option.objects.filter(VariableID=int(request.POST['VarID']))
response = []
for i in currentOptions:
vallabel = {}
vallabel['OptionID'] = i.id
vallabel['OptionValue'] = i.Value
vallabel['OptionLabel'] = i.Label
response.append(vallabel)
json = simplejson.dumps(response)
return HttpResponse(json, mimetype="text/json")
else:
pass
出于 CSRF 原因需要 Javascript。
<script type="text/javascript">
jQuery(document).ajaxSend(function(event, xhr, settings) {
function getCookie(name) {
var cookieValue = null;
if (document.cookie && document.cookie != '') {
var cookies = document.cookie.split(';');
for (var i = 0; i < cookies.length; i++) {
var cookie = jQuery.trim(cookies[i]);
// Does this cookie string begin with the name we want?
if (cookie.substring(0, name.length + 1) == (name + '=')) {
cookieValue = decodeURIComponent(cookie.substring(name.length + 1));
break;
}
}
}
return cookieValue;
}
function sameOrigin(url) {
// url could be relative or scheme relative or absolute
var host = document.location.host; // host + port
var protocol = document.location.protocol;
var sr_origin = '//' + host;
var origin = protocol + sr_origin;
// Allow absolute or scheme relative URLs to same origin
return (url == origin || url.slice(0, origin.length + 1) == origin + '/') ||
(url == sr_origin || url.slice(0, sr_origin.length + 1) == sr_origin + '/') ||
// or any other URL that isn't scheme relative or absolute i.e relative.
!(/^(\/\/|http:|https:).*/.test(url));
}
function safeMethod(method) {
return (/^(GET|HEAD|OPTIONS|TRACE)$/.test(method));
}
if (!safeMethod(settings.type) && sameOrigin(settings.url)) {
xhr.setRequestHeader("X-CSRFToken", getCookie('csrftoken'));
}
});
</script>
用于您的特定 AJAX 请求的 Javascript。
为了在列表中显示 dicts 中的值,我们将遍历 AJAX 请求成功返回的数据。JS 函数是用 jQuery 完成的。
function AddOptions(VarID){
$.ajax({
type:"POST",
url:"{% url builder.views.currentoptions %}",
data: {VarID: VarID},
success: function(data){
$('#OptionTable > tbody > tr').remove();
$.each(data, function(index) {
$('#OptionTable > tbody:last').append('<tr id=Option_'+data[index].OptionID+'><td>'+data[index].OptionValue+'</td><td>'+data[index].OptionLabel+'</td><td><a href="#" onClick="deleteOption('+data[index].OptionID+')"><i class="icon icon-remove"></i></a>');
});
}
});
}