Question

我正在使用express和mongodb在服务器上创建应用程序。我以前在开发此应用程序方面做得很好，直到做了一个小的更改，我的所有查询都无法在mongodb上工作。我对连接字符串进行了三重检查，邮递员的输出已到达该函数，但从未触发mongodb查询回调。

这是我的server.js

require("dotenv").config();
const express = require("express");
const bodyParser = require("body-parser");
const cors = require("cors");
const authenticationController = require("./controllers/authenticationController");
const mainActionsController = require("./controllers/mainActionsController");

const app = express();
app.use(bodyParser.urlencoded({ extended: false }));
app.use(bodyParser.json());
app.use(cors());

// all user actions
app.use("/auth", authenticationController);

app.use("/memoryleak", mainActionsController);

// Fail safe. Here's our classic 404 error :P
app.all("*", (req, res) => {
  res
    .status(404)
    .send(
      "Sorry, the content you were looking for was not found. The classic 404 "
    );
});

const port = process.env.PORT || 3001;
app.listen(port, function() {
  console.log("Express server listening on port " + port);
});

module.exports = { app };

这是我的mainActionsController的一个片段，该片段在上方触发并使用了路由器...

const router = express.Router();
const mongoose = require("mongoose");
const { Questions, Replies, Users } = require("../dbschema");
const repliesController = require("./repliesController");
const questionController = require("./questionController");
const notificationController = require("./notificationsController");

router.get("/getQuestionById/:id", (req, res) => {
  questionController.getQuestionById(req, res, Questions, mongoose);
});
router.get("/questions", (req, res) => {
  questionController.getAllQuestions(req, res, Questions);
});

module.exports = router;

这是我的getAllQuestions函数：

const getAllQuestions = (req, res, Questions) => {
  console.log("got to the correct function");
  Questions.find({}, (err, docs) => {
    console.log("hello? CAN YOU HEAR ME");
    console.log(err, docs);
    if (err) {
      console.log(err);
      return res.status(400).send(err);
    }
    console.log(docs);
    return res.status(200).send(docs);
  });
};

当邮递员打到路由时，将到达所有这些控制台日志，但是回调函数内部没有任何记录，并且连接只是挂起。

最后，这是我的数据库架构

const mongoose = require("mongoose");
const UserSchema = new mongoose.Schema({
  userName: { type: String, unique: true, required: true },
  passWord: { type: String, required: true },
  questionsAsked: { type: Array, required: true },
  repliesGiven: { type: Array, required: true },
  itemsLiked: { type: Array, required: true },
  notifications: { type: Array, required: true }
});
const QuestionSchema = new mongoose.Schema({
  title: { type: String, required: true },
  questionBody: { type: String, required: true },
  numReplies: { type: Number, required: true },
  numLikes: { type: Number, required: true },
  numVotes: { type: Number, required: true },
  tags: { type: Array, required: true },
  contributor: { type: String, required: true }
});
const ObjectId = mongoose.Schema.Types.ObjectId;
const ReplySchema = new mongoose.Schema({
  questionID: ObjectId,
  title: String,
  questionBody: String,
  numLikes: Number,
  numVotes: Number,
  contributor: String
});

mongoose.model("Reply", ReplySchema);
mongoose.model("Question", QuestionSchema);
mongoose.model("User", UserSchema);

module.exports = {
  Questions: mongoose.model("Question"),
  Replies: mongoose.model("Reply"),
  Users: mongoose.model("User")
};[1]

任何反馈将不胜感激。

为什么MongoDB简单读取查询不起作用？

0 个答案: