我正在通过教程学习Node.js来构建一个简单的API。 我有自己的postgres数据库,我试图检索一个表,而不是在教程中使用示例db / dummy数据库。我正在关注教程中的所有内容,唯一的事情是我使用自己的数据库并且找不到404错误。
我的Index.js
var express = require('express');
var router = express.Router();
var db = require('../queries');
router.get('/api/preference', function(req,res){ res.send('hi'); })
module.exports = router;
Queries.js
var promise = require('bluebird');
var options ={
//Initialization options
promiseLib : promise
};
var pgp = require('pg-promise')(options);
var db = pgp({
host: 'localhost',
port: 5432,
database: 'pmc',
user: 'tarun',
password: 'pes'
});
var connectionstring = 'postgres://tarun:pes@localhost:5432/pmc';
var db = pgp(connectionstring);
//add query funtions
module.exports = {
getAllPreference : getAllPreference
};
function getAllPreference(req,res,next){
db.any('select * from core.preferences')
.then(function(data){
res.status(200)
.json({
status : 'success',
data : data,
message: 'Retrieved ALL preferences'
});
})
.catch(function (err) {
return next(err);
});
}
app.js
var express = require('express');
var path = require('path');
var favicon = require('serve-favicon');
var logger = require('morgan');
var cookieParser = require('cookie-parser');
var bodyParser = require('body-parser');
var index = require('./routes/index');
var users = require('./routes/users');
var app = express();
// view engine setup
app.set('views', path.join(__dirname, 'views'));
app.set('view engine', 'jade');
// uncomment after placing your favicon in /public
//app.use(favicon(path.join(__dirname, 'public', 'favicon.ico')));
app.use(logger('dev'));
app.use(bodyParser.json());
app.use(bodyParser.urlencoded({ extended: false }));
app.use(cookieParser());
app.use(express.static(path.join(__dirname, 'public')));
app.use('/', index);
app.use('/users', users);
// catch 404 and forward to error handler
app.use(function(req, res, next) {
var err = new Error('Not Found');
err.status = 404;
next(err);
});
// error handler
app.use(function(err, req, res, next) {
// set locals, only providing error in development
res.locals.message = err.message;
res.locals.error = req.app.get('env') === 'development' ? err : {};
// render the error page
res.status(err.status || 500);
res.render('error');
});
module.exports = app;
错误
错误:未找到 在D:\ node-postgress-promises \ app.js:32:13 在Layer.handle [as handle_request](D:\ node-postgress-promises \ node_modules \ express \ lib \ router \ layer.js:95:5) 在trim_prefix(D:\ node-postgress-promises \ node_modules \ express \ lib \ router \ index.js:317:13) 在D:\ node-postgress-promises \ node_modules \ express \ lib \ router \ index.js:284:7 在Function.process_params(D:\ node-postgress-promises \ node_modules \ express \ lib \ router \ index.js:335:12) 在下一个(D:\ node-postgress-promises \ node_modules \ express \ lib \ router \ index.js:275:10) 在D:\ node-postgress-promises \ node_modules \ express \ lib \ router \ index.js:635:15 在下一个(D:\ node-postgress-promises \ node_modules \ express \ lib \ router \ index.js:260:14) 在Function.handle(D:\ node-postgress-promises \ node_modules \ express \ lib \ router \ index.js:174:3) 在路由器(D:\ node-postgress-promises \ node_modules \ express \ lib \ router \ index.js:47:12)
块引用
答案 0 :(得分:0)
更改此部分代码,如下所示
exports.getAllPreference = function(req,res,next){
console.log('h');
db.any('select * from core.preferences')
.then(function(data){
res.status(200)
.json({
status : 'success',
data : data,
message: 'Retrieved ALL preferences'
});
})
.catch(function (err) {
next(err);
});
}
删除此文件中的以下代码
module.exports = {
getAllPreference= getAllPreference
}
更改index.js文件删除以下行
module.exports = {
getAllPreference: getAllPreference
};
function getAllPreference(req, res, next) {};
取消注释
module.exports = router;
添加以下代码以进行测试。在index.js文件中
router.get('/api/preference', function(req,res){
res.send('hi');
};