[英]Passing parameters to routes in node.js
我是Web開發的新手。 我曾經使用WPF和C#進行桌面開發。 現在我正在學習Node.js
我有一個名為Party.js的模型,其中定義了兩個導出,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);
});
};
現在,我還有一條名為Party.js的路由,其中有兩個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);
}
});
}
});
});
現在,當我使用ajax時:
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;
}
});
我的問題是:為什么上面的ajax調用會返回所有各方? 我只想參加一個將其patyCode傳遞給ajax調用數據的聚會。
路由器響應代碼和ajax函數都存在一些錯誤:
首先更正您的路由器代碼:
您沒有在模型中使用提供的參與方代碼。
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);
}
});
}
});
});
正確的Ajax函數調用
您必須提供/:partyCode
代碼作為URL參數,如路由器所指示的/:partyCode
。 請嘗試以下操作:
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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