Question

我是Node的新手。我需要制作一个从属下拉菜单，该菜单从同一页面中的另一个下拉菜单中获取选定用户的地址数据。问题是不仅更新了第二个下拉菜单，还更新了孔页面。我认为这是相同的问题就像dynamically dropdown in nodejs mysql一样，但这并没有太大帮助。

<select name="selectUser" id="user" >
  <option disabled selected> Select User..</option>
  <% users.forEach((users) => { %>
    <option value="<%= users.id %>" > <%=users.name %> </option>
  <%  })  %>
</select>
<br>
<label>Address :</label>
<select name="selectAddress" id="address">
  <option disabled selected> Select Address..</option>
  <% address.forEach((address) => { %>
    <option value="<%= address.addressId %>" > <%=address.addressName %> </option>
</select>
  <%  })  %>

我的ajax请求：

 $(document).ready(function(){
  $('#user').change(function(){

   var item =  $('#user').val();
   var add  = $('#address').val();
   $.ajax({
       type:'GET',
       data: {selectedId : item },
       url:'/order/new',
       success: function(result1){
           $('#body').html(result1);

       }
   });
  });
});

order.js

 module.exports = {
      addOrderPage: (req, res) => {
    let query1 = "SELECT * FROM users";
    getConnection().query(query1, (err, result1) => {
            let query2 = "SELECT * FROM address WHERE userId = '" +req.query.selectedId + "'";
            getConnection().query(query2, (err, rows, fields) => {
              if (err) {
                return res.status(500).send(err);
              }
               console,log(rows)
              res.render('newOrder.ejs', {
                  address : rows,
                  users: result1
              });
              });
    });
}
    }

app.js

app.get('/order/new', addOrderPage)

Answer 1

您的成功功能缺少从请求返回的数据更新您的成功功能

       $(document).ready(function(){
       $('#user').change(function(){ 

        var item = $('#user').val();

        $.ajax({
            type:'GET',
            data: { selectedId: item },
            url:'/users/address',
            success: function(data){
                console.log(data);
                 $('#address').empty();
             $('address').append("<option disabled selected> Select Address..</option>");
             $.each(data, function (index, addressObj) {
                    $('#address').append("<option value = '" + addressObj.id + "' > " + addressObj.first_name + ". </option > ");
                });
            }
        });
       });

在您的order.js中，您需要为用户创建一个呼叫，为用户创建一个呼叫地址数据

  module.exports = {
addOrderPage: (req, res) => {
    var selecteduser = req.query.selectedId;
    let query1 = "SELECT * FROM users";
    db.query(query1, (err, result1) => {
            if (err) {
                return res.status(500).send(err);
            }
            res.render('newOrder.ejs', {
                players: result1,
            });
    });
},
getUserAddress: (req, res) => {
    var selecteduser = req.query.selectedId;
    let query1 = "SELECT * FROM address WHERE userId = '" + selectedId + "'";
    db.query(query1, (err, result1) => {
        if (err) {
            return res.status(500).send(err);
        }
        res.send(result1);
    });
}

}

neworder.js

 <select name="selectUser" id="user" >
    <option disabled selected> Select User..</option>
     <% users.forEach((users) => { %>
    <option value="<%= users.id %>" > <%=users.name %> </option>
    <%  })  %>
 </select>
 <br>
 <label>Address :</label>
 <select name="selectAddress" id="address">
  <option disabled selected> Select Address..</option>
 </select>

在您的app.js或index.js中，您需要添加其路由

 app.use("/users/address", order.getUserAddress);

动态下拉菜单节点js

1 个答案: