我一直有一个问题,我如何才能得到我的选择选项的值,我一直在使用javascript设置选择选项的值,下面是我的代码,这是返回省值的数字,而不是文本。问题是如何将数字转换为文本,是否有专家分享解决方案
views.py
def sample_data(request):
if request.method=='POST':
province = request.POST['list1']
print(province) #return ex. 2 depend on select value
return render (request,'sample.html')
Select option - my reference link
<select id="list1" name ="list1" onchange="updateList('list2', this);"></select>
<select id="list2" name ="list2" onchange="updateList('list3', this);"></select>>
<select id="list3" name ="list3"></select>
javascript
let data = [{"id":1,"name":"USA","parentid":0},
{"id":2,"name":"Japan","parentid":0},
{"id":3,"name":"Europe","parentid":0},
{"id":4,"name":"California","parentid":1},
{"id":5,"name":"Oklahoma","parentid":1},
{"id":6,"name":"Arizona","parentid":1},
{"id":7,"name":"Kantô","parentid":2},
{"id":8,"name":"Kansai","parentid":2},
{"id":9,"name":"Chügoku","parentid":2},
{"id":10,"name":"France","parentid":3},
{"id":11,"name":"Deutschland","parentid":3},
{"id":12,"name":"Espana","parentid":3},
{"id":13,"name":"Sacramento","parentid":4},
{"id":14,"name":"Los Angeles","parentid":4},
{"id":15,"name":"San Diego","parentid":4},
{"id":16,"name":"Tulsa","parentid":5},
{"id":17,"name":"Oklahoma City","parentid":5},
{"id":18,"name":"Lawton","parentid":5},
{"id":19,"name":"Phoenix","parentid":6},
{"id":20,"name":"Flagstaff","parentid":6},
{"id":21,"name":"Tucson","parentid":6},
{"id":21,"name":"Tokyo","parentid":7},
{"id":22,"name":"Chiba","parentid":7},
{"id":23,"name":"Tochigi","parentid":7},
{"id":24,"name":"Kyoto","parentid":8},
{"id":25,"name":"Osaka","parentid":8},
{"id":26,"name":"Nara","parentid":8},
{"id":27,"name":"Tottori","parentid":9},
{"id":28,"name":"Hirochima","parentid":9},
{"id":29,"name":"Okayama","parentid":9},
{"id":30,"name":"Quimper","parentid":10},
{"id":31,"name":"Toulouse","parentid":10},
{"id":32,"name":"Nancy","parentid":10},
{"id":33,"name":"Dusseldorf","parentid":11},
{"id":34,"name":"Leipzig","parentid":11},
{"id":35,"name":"Munchen","parentid":11},
{"id":36,"name":"Barcelona","parentid":12},
{"id":37,"name":"Sevilla","parentid":12},
{"id":38,"name":"Guernica","parentid":12}]
function populateList(list, pid) {
let l = document.getElementById(list);
l.innerHTML = "";
let topItem = document.createElement("option");
topItem.value = 0;
topItem.text = "--Select--";
l.appendChild(topItem);
let items = data.filter(item => item.parentid == pid);
items.forEach(function(item){
let newItem = document.createElement("option");
newItem.value = item.id;
newItem.text = item.name;
l.appendChild(newItem);
})
}
function updateList(selList, thisList) {
if (thisList.value != 0) {
populateList(selList, Number(thisList.value));
} else {
let s = document.getElementById(selList);
s.value = 0;
triggerEvent(s, "onchange");
let sCopy = s.cloneNode(false);
let p = s.parentNode;
p.replaceChild(sCopy, s);
}
}
function triggerEvent(e, trigger)
{
if ((e[trigger] || false) && typeof e[trigger] == 'function')
{
e[trigger](e);
}
}
function loadList1() {
populateList("list1", 0);
}
window.onload = loadList1;
您需要在此处传递
name
值newItem.value
,因为在提交选项时value
属性被传递到后端。更改后,仍然需要id
填充下一个选择框,以便可以创建值为id
的自定义属性,然后将其传递给函数演示代码