在 Node/Angular 應用程序中創建新的 MSSQL 記錄的問題

Question

我正在嘗試通過我的節點/角度應用程序在現有的 Azure MSSQL 數據庫中創建一個新行。 GET 請求正確觸發，我用來生成數據的表單根據我的判斷正確生成了 JSON，但是當 POST 函數觸發時，我收到以下錯誤：

Trace: { RequestError: JSON text is not properly formatted. Unexpected character 'o' is found at position 1.
    at RequestError (C:\Users\jlea\Desktop\Code\tnplan-boot\node_modules\tedious\lib\errors.js:34:12)
    at Parser.<anonymous> (C:\Users\jlea\Desktop\Code\tnplan-boot\node_modules\tedious\lib\connection.js:614:36)
    at Parser.emit (events.js:182:13)
    at Parser.<anonymous> (C:\Users\jlea\Desktop\Code\tnplan-boot\node_modules\tedious\lib\token\token-stream-parser.js:54:15)
    at Parser.emit (events.js:182:13)
    at addChunk (C:\Users\jlea\Desktop\Code\tnplan-boot\node_modules\readable-stream\lib\_stream_readable.js:291:12)
    at readableAddChunk (C:\Users\jlea\Desktop\Code\tnplan-boot\node_modules\readable-stream\lib\_stream_readable.js:278:11)
    at Parser.Readable.push (C:\Users\jlea\Desktop\Code\tnplan-boot\node_modules\readable-stream\lib\_stream_readable.js:245:10)
    at Parser.Transform.push (C:\Users\jlea\Desktop\Code\tnplan-boot\node_modules\readable-stream\lib\_stream_transform.js:148:32)
    at doneParsing (C:\Users\jlea\Desktop\Code\tnplan-boot\node_modules\tedious\lib\token\stream-parser.js:110:18)
  message:
   'JSON text is not properly formatted. Unexpected character \'o\' is found at position 1.',
  code: 'EREQUEST',
  number: 13609,
  state: 4,
  class: 16,
  serverName: 'xxxxxxx',
  procName: 'createReport',
  lineNumber: 5 }
    at Object.fnOnError (C:\Users\jlea\Desktop\Code\tnplan-boot\node_modules\express4-tedious\index.js:104:25)
    at Request.userCallback (C:\Users\jlea\Desktop\Code\tnplan-boot\node_modules\express4-tedious\index.js:59:64)
    at Request._this.callback (C:\Users\jlea\Desktop\Code\tnplan-boot\node_modules\tedious\lib\request.js:60:27)
    at Connection.endOfMessageMarkerReceived (C:\Users\jlea\Desktop\Code\tnplan-boot\node_modules\tedious\lib\connection.js:1922:20)
    at Connection.dispatchEvent (C:\Users\jlea\Desktop\Code\tnplan-boot\node_modules\tedious\lib\connection.js:1004:38)
    at Parser.<anonymous> (C:\Users\jlea\Desktop\Code\tnplan-boot\node_modules\tedious\lib\connection.js:805:18)
    at Parser.emit (events.js:182:13)
    at Parser.<anonymous> (C:\Users\jlea\Desktop\Code\tnplan-boot\node_modules\tedious\lib\token\token-stream-parser.js:54:15)
    at Parser.emit (events.js:182:13)
    at addChunk (C:\Users\jlea\Desktop\Code\tnplan-boot\node_modules\readable-stream\lib\_stream_readable.js:291:12)
events.js:167
      throw er; // Unhandled 'error' event
      ^

這是我的 app.js 代碼：

const express = require('express');
const config = require('config');
const bodyParser = require('body-parser');
const tediousExpress = require('express4-tedious');
const cors = require('cors');
const path = require('path');

const app = express();
app.use(function (req, res, next) {
  req.sql = tediousExpress(config.get('connection'));
  next();
});

const corsOptions = {
  origin: '*',
  optionsSuccessStatus: 200
};

app.use(express.static(__dirname + '/dist/tnplan-boot'));
app.use(bodyParser.json());
app.options('*', cors(corsOptions));
app.use('/monthlyReport', require('./routes/monthlyReport'));


// "index" route, which serves the Angular app
app.get('/', function (req, res) {
  res.sendFile(path.join(__dirname, '/dist/tnplan-boot/index.html'));
});

// catch 404 and forward to error handler
app.use(function (req, res, next) {
  const err = new Error('Not Found: ' + req.method + ":" + req.originalUrl);
  err.status = 404;
  next(err);
});

app.set('port', process.env.PORT || 8080);

const server = app.listen(app.get('port'), function () {
  console.log('Express server listening on port ' + server.address().port);
});

module.exports = app;

和我的 sql 路由代碼：

const router = require('express').Router();
const TYPES = require('tedious').TYPES;

/* GET reports. */
router.get('/', function (req, res) {

  req.sql("select * from jacksonwaste for json path")
    .into(res, '[]');

});

/* GET single report. */
router.get('/:id', function (req, res) {

  req.sql("select * from jacksonwaste where id = @id for json path, without_array_wrapper")
    .param('id', req.params.id, TYPES.Int)
    .into(res, '{}');

});

/* POST create report. */
router.post('/', function (req, res) {

  req.sql("exec createReport @report")
    .param('report', req.body, TYPES.NvarChar)
    .exec(res)
    console.log(req.body);
});

/* PUT update report. */
router.put('/:id', function (req, res) {

  req.sql("exec updateReport @id, @report")
    .param('id', req.params.id, TYPES.Int)
    .param('report', req.body, TYPES.NvarChar)
    .exec(res);

});

/* DELETE single report. */
router.delete('/:id', function (req, res) {

  req.sql("delete from jacksonwaste where id = @id")
    .param('id', req.params.id, TYPES.Int)
    .exec(res);

});

module.exports = router;

最后，我的 mssql 存儲過程代碼：

/****** Object:  StoredProcedure [dbo].[createReport]    Script Date: 8/15/2018 9:13:31 AM ******/
SET ANSI_NULLS ON
GO
SET QUOTED_IDENTIFIER ON
GO

ALTER procedure [dbo].[createReport](@report nvarchar(max))
as begin
SET NOCOUNT ON
    insert into jacksonwaste (reportuser, reportdate, percentcomp, err, errdate, acquisition, acqdate, pns, pnsdate, bidtabs, bidtabsdate, constructionstart, constartdate, constructionend, conenddate, monitored, monitorready,
    contractoractivity, lastcafsubmission, mostrecentinvoice, phases, phaseupdate, hasoccured, willoccur, issues, tnecdhelp)
    select *
    from OPENJSON(@report) 
            WITH (  
            reportuser nvarchar(128), 
            reportdate date,
            percentcomp int,
            err bit,
            errdate date,
            acquisition bit,
            acqdate date,
            pns bit,
            pnsdate date,
            bidtabs bit,
            bidtabsdate date,
            constructionstart bit,
            constartdate date,
            constructionend bit,
            conenddate date,
            monitored bit,
            monitorready bit,
            contractoractivity bit,
            lastcafsubmission date,
            mostrecentinvoice date,
            phases bit,
            phaseupdate nvarchar(1000),
            hasoccured nvarchar(1000),
            willoccur nvarchar(1000),
            issues nvarchar(1000),
            tnecdhelp nvarchar(1000)
            )
end

編輯：添加了傳遞給 sql 請求的 JSON 對象，以表明沒有我可以看到的意外字符：

{ reportuser: 'john',
  reportdate: '2018-08-11',
  percentcomp: '4',
  err: true,
  pns: true,
  pnsdate: '2018-08-04',
  errdate: '2018-08-16',
  constructionstart: true,
  constartdate: '2018-08-29',
  lastcafsubmission: '2018-08-23',
  mostrecentinvoice: '2018-08-24',
  phaseupdate: 'test',
  hasoccured: 'test',
  willoccur: 'test',
  issues: 'test',
  tnecdhelp: 'test' }

我哪里錯了？

Answer 1

為了記錄，希望這有助於將來的某人：

我最近遇到了一個非常相似的問題（完全相同的RequestError ）並發現我將 JSON 作為對象傳遞，而 express4-tedious 期待一個字符串。 JSON.stringify(req.body)做到了。

換句話說，改變你的等價物

req.sql("exec updateReport @id, @report")
       .param('id', req.params.id, TYPES.Int)
       .param('report', req.body, TYPES.NvarChar)
       .exec(res);

到

req.sql("exec updateReport @id, @report")
       .param('id', req.params.id, TYPES.Int)
       .param('report', JSON.stringify(req.body), TYPES.NvarChar)
       .exec(res);

解決了我的問題。