node.js - MongoDB - Postman 错误 - 数据发送失败

Question

我已经使用 Mean Stack 构建了一个项目。我创建了一个可以插入数据的报表。

当我从表单插入数据时，数据被插入到集合中。

但是当我使用 Postman 插入数据时，数据插入失败。

以下是代码段:

1.前端表单-report.component.html

            <form (ngSubmit)="savereportdata()" novalidate>
            <ba-card>
                <div class="form-group">
                    <label for="middleItemId">Item ID</label>
                    <input type="text" class="form-control" placeholder="Enter Item ID" [(ngModel)]="itemId" name="itemId">
                </div>
                <div class="form-group">
                    <label for="middleItemName">Item Name</label>
                    <input type="text" class="form-control" placeholder="Enter Item Name" [(ngModel)]="itemName" name="itemName">
                </div>

                <div class="form-group">
                    <label for="warrentyUntil">Warrenty Until</label>
                    <input type="date" readonly="" class="form-control">
                </div>

                <div class="form-group">
                    <label for="reportDescription">Description</label>
                    <textarea class="form-control" rows="3" [(ngModel)]="reportDescription" name="reportDescription"></textarea>
                </div>

                <button type="submit" class="btn btn-primary">Submit</button>
            </ba-card>
        </form>

2.report.component.ts

import { NgModule,Component,Pipe,OnInit } from '@angular/core';
import { ReportItemService } from '../../../services/report-item.service'

@Component({
  selector: 'app-report',
  templateUrl: './report.component.html'
})

export class ReportComponent implements OnInit {

  itemId:Number;
  itemName:String;
  reportDescription:String;
  constructor(public reportservice:ReportItemService) {}

  ngOnInit() {}      

  savereportdata() {         
      const reportitem = {
          itemId:this.itemId,
          itemName:this.itemName,
          reportDescription:this.reportDescription
        };    
        this.reportservice.reportitemdata(reportitem).subscribe(res=> {
            console.log(res);
        }); 
    }
}  

3.report-item.service.ts

import { Injectable } from '@angular/core';
import { Http,Headers} from '@angular/http';
import 'rxjs/add/operator/map';


@Injectable()
export class ReportItemService {
    reportitem:any;
    constructor(private http:Http) {}
    reportitemdata(reportitem) {
        let headers=new Headers();
        headers.append('Content-Type','application/json');
        return this.http.post("http://localhost:3000/reportItem",reportitem,{headers:headers}).map(res=>res.json());
    }
} 

4.后端模型-report.js

const mongoose = require('mongoose');
const schema = mongoose.Schema;

const reportSchema = new schema({
    itemId: { type: Number, required: true },
    itemName: { type: String },
    reportDescription: { type: String },
    date: { type: Date }
});

module.exports = mongoose.model("ReportItem", reportSchema);
module.exports.saveReportItem = function(newreport, callback) {
    console.log(newreport);
    newreport.save(callback);
};

5.router-reportItem.js

const express = require('express');
const router = express.Router();
const config = require('../config/database');
const ReportItem = require('../models/request-report/report');
router.post("", function(req, res) {

    const newreport = new ReportItem({
        itemId: req.body.itemId,
        itemName: req.body.itemName,
        reportDescription: req.body.reportDescription,
        date: new Date
    });

    ReportItem.saveReportItem(newreport, function(err, report) {
        if (err) {
            res.json({ state: false, msg: "data not inserted" });
        }
        if (report) {
            res.json({ state: true, msg: "data inserted" });
        }
    });
});

module.exports = router;

从表单插入数据时的结果截图:

Postman报错截图:

几个星期以来，我一直在努力解决这个问题，但没能成功。

提前致谢!

Answer 1

您可以尝试使用 bodyParser js代码中的模块从请求中获取数据。我过去遇到过这方面的问题。