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[英]TypeError: undefined is not a function in node.js / express.js
[英]SQL Server on Azure connected to REST API Express.js/Node.js [TypeError: req.sql is not a function]
嗨,我在使用 express4-tedious 連接到 Azure SQL Server 時遇到問題。 我正在嘗試使用 Node/Express 服務器(REST API)制作本機反應的應用程序,但在 express4-tedios 設置后出現此錯誤:req.sql 不是函數
類型錯誤:req.sql 不是函數
這是我在服務器文件夾上的 app.js
var createError = require('http-errors');
var express = require('express');
var path = require('path');
var cookieParser = require('cookie-parser');
var logger = require('morgan');
var cors = require("cors");
var tediousExpress = require('express4-tedious');
var indexRouter = require('./routes/index');
var usersRouter = require('./routes/users');
var testAPIRouter = require("./routes/testAPI");
var app = express();
app.set('views', path.join(__dirname, 'views'));
app.set('view engine', 'jade');
app.use(cors());
app.use(logger('dev'));
app.use(express.json());
app.use(express.urlencoded({ extended: false }));
app.use(cookieParser());
app.use(express.static(path.join(__dirname, 'public')));
app.use('/', indexRouter);
app.use('/users', usersRouter);
app.use("/testAPI", testAPIRouter);
app.use(function (req, res, next) {
req.sql = tediousExpress(req,
{
"server" : "something.database.windows.net",
"userName": "something",
"password": "something",
"options": { "encrypt": true, "database": "something" }
}
);
next();
});
// catch 404 and forward to error handler
app.use(function(req, res, next) {
next(createError(404));
});
// 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;
這是我的 testAPI.js,我在其中運行 req.sql() 函數
var express = require("express");
var router = express.Router();
router.get('/', function (req, res) {
req.sql("select * from Persons for json path")
.into(res);
});
module.exports = router;
我真的很感謝任何人的幫助。 :)
那是因為您在路由之后定義了中間件。 您必須首先定義這個中間件。 並且,調用要定義的路由。
例如:
app.use(function (req, res, next) {
req.sql = tediousExpress(req,
{
"server" : "something.database.windows.net",
"userName": "something",
"password": "something",
"options": { "encrypt": true, "database": "something" }
}
);
next();
});
app.use('/', indexRouter);
app.use('/users', usersRouter);
app.use("/testAPI", testAPIRouter);
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