[英]Passing parameters to routes in node.js
I am very new to Web Development. 我是Web开发的新手。 I used to do desktop development using WPF and C#.
我曾经使用WPF和C#进行桌面开发。 Now I am learning Node.js
现在我正在学习Node.js
I have a model called Party.js in which I define two exports as follows: 我有一个名为Party.js的模型,其中定义了两个导出,如下所示:
module.exports.getAllParties = function(callback){
Party.find().lean().exec(function(err, parties){
if (err) return callback(err, null);
callback(null, parties);
});
};
module.exports.getPartyByPartyCode = function(partyCode, callback){
Party.find({partyCode: partyCode}).exec(function(err, party){
if(err) return callback(err, null);
callback(null, party);
});
};
Now, I also have a route called Party.js in which I have two get methods as follows: 现在,我还有一条名为Party.js的路由,其中有两个get方法,如下所示:
router.get('/', function(req, res, next){
//retrieve all parties from Party model
Party.getAllParties(function(err, parties) {
if (err) {
return console.error(err);
} else {
//respond to both HTML and JSON. JSON responses require 'Accept: application/json;' in the Request Header
res.format({
//response in dust or jade files
html: function(){
res.render('Party', {
title: 'Party',
"parties" : parties
});
},
//JSON response will show all parties in JSON format
json: function(){
res.json(parties);
}
});
}
});
});
router.get('/:partyCode', function(req, res, next){
Party.getPartyByPartyCode(function(err, party) {
if (err) {
return console.error(err);
} else {
//respond to both HTML and JSON. JSON responses require 'Accept: application/json;' in the Request Header
res.format({
//response in dust or jade files
html: function(){
res.render('Party', {
title: 'Party',
"party" : party
});
},
//JSON response will show all parties in JSON format
json: function(){
res.json(party);
}
});
}
});
});
Now, when I use ajax: 现在,当我使用ajax时:
var inputElem = $('#partyForm :input[name="partyCode"]'),
inputVal = inputElem.val(),
data = { partyCode : inputVal },
eReport = ''; //error report
$.ajax(
{
type: "GET",
url: "/Party",
dataType: "json",
data: data,
beforeSend: function(jqXHR, settings)
{
console.log(settings.url);
},
success: function(party)
{
if (party)
{
console.log(party);
return 'Party ' + party.partyName + ' has already taken party code: ' + party.partyCode + '. Please choose a different PartyCode.';
}
else
{
console.log("party does not exist.");
return true;
}
},
error: function(xhr, textStatus, errorThrown)
{
alert('ajax loading error... ... '+url + query);
return false;
}
});
My question is: Why the above ajax call returns me all the parties? 我的问题是:为什么上面的ajax调用会返回所有各方? I just want to get a party whose patyCode is passed in to the ajax call's data....
我只想参加一个将其patyCode传递给ajax调用数据的聚会。
There are some errors in both your router response code and ajax function: 路由器响应代码和ajax函数都存在一些错误:
First correct your router code: 首先更正您的路由器代码:
You were not using the provided party code in your model. 您没有在模型中使用提供的参与方代码。
router.get('/:partyCode', function (req, res, next) {
var partyCode = req.param('partyCode');
Party.getPartyByPartyCode(partyCode, function (err, party) {
if (err) {
return console.error(err);
} else {
//respond to both HTML and JSON. JSON responses require 'Accept: application/json;' in the Request Header
res.format({
//response in dust or jade files
html: function () {
res.render('Party', {
title: 'Party',
"party": party
});
},
//JSON response will show all parties in JSON format
json: function () {
res.json(party);
}
});
}
});
}); });
Correct Ajax function calling 正确的Ajax函数调用
You must provide the party code as a URL parameter as your router indicates like that /:partyCode
. 您必须提供
/:partyCode
代码作为URL参数,如路由器所指示的/:partyCode
。 Try the following: 请尝试以下操作:
var inputElem = $('#partyForm :input[name="partyCode"]'),
inputVal = inputElem.val(),
eReport = ''; //error report
$.ajax({
type: "GET",
url: "/"+inputVal,
dataType: "json",
data: data,
beforeSend: function (jqXHR, settings) {
console.log(settings.url);
},
success: function (party) {
if (party)
{
console.log(party);
return 'Party ' + party.partyName + ' has already taken party code: ' + party.partyCode + '. Please choose a different PartyCode.';
}
else
{
console.log("party does not exist.");
return true;
}
},
error: function (xhr, textStatus, errorThrown) {
alert('ajax loading error... ... ' + url + query);
return false;
}
});
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