我很难找到一种好的方法来实现在前端和express后端使用Pug(jade)的向上投票/向下投票功能。我当前的设置如下所示。我循环遍历mongo db中的项目以显示评级项目。
each val in post['listitem']
div.listitem
.rating_button
.buttons
button(class='up' aria-pressed="false") Upvote
p#vote 0 //currently 0 later data from db
button(class='down' ariapressed="false")Downvote
然后,我有一个客户端ajax调用到我的api
$(document).ready(function(){
$(document).on('click', '.up', function(){
var up = $.post("/api/:id/upvote", {changeBy: 1}, function(dataBack){
$("#vote").text(dataBack);
});
});
$(document).on('click', '.down', function(){
var down = $.post("/api/:id/downvote", {changeBy: 1},
function(dataBack){
$("#vote").text(dataBack);
});
});
});
Api看起来是这样的--首先是siteController
exports.upvote = async (req, res) => {
res.setHeader("Content-Type", "application/json");
vote += parseFloat(req.body.changeBy);
res.write(JSON.stringify(vote));
res.end();
console.log(vote);}
exports.downvote = async (req, res) => {
res.setHeader("Content-Type", "application/json");
vote -= parseFloat(req.body.changeBy);
res.write(JSON.stringify(vote));
res.end();
console.log(vote);}
Second my index.js
router.post('/api/:id/upvote', siteController.upvote);
router.post('/api/:id/downvote', siteController.downvote);
一切都按预期运行,但使用此设置时,我循环中的按钮不能正常工作。只有第一个按钮将数字加/减1。
如何使用循环中的按钮解决问题?有什么灵感/想法来改进当前的设置吗?
发布于 2018-12-06 10:10:04
您需要以某种方式将id传递给onclick函数。一种方法是设置单击元素的id,如下所示:
each val in post['listitem']
div.listitem
.rating_button
.buttons
button(id= val.id class='up' aria-pressed="false") Upvote
p#vote 0 //currently 0 later data from db
button(id= val.id class='down' ariapressed="false")Downvote
然后,您可以通过在click函数中添加对元素的引用来捕获它:
$(document).on('click', '.up', function(element){
var id = element.target.id;
var up = $.post("/api/" + id + "/upvote", {changeBy: 1}, function(dataBack){
$("#vote").text(dataBack);
});
});
https://stackoverflow.com/questions/53640353
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