[英]Mongoose: TypeError: 'mongooseSchemahere' is not a function
我在models / user.js中有以下貓鼬模式設置:
const mongoose = require('mongoose');
const userSchema = mongoose.Schema({
loginId: String,
firstname: String,
lastname: String,
eMail: String,
password: String,
active: Boolean
});
module.exports = userSchema;
在我的主要app.js中,我有以下代碼:
const mongoose = require('mongoose');
var MongoClient = require('mongodb').MongoClient;
var url = "mongodb://localhost:27017/";
MongoClient.connect(url, {
useUnifiedTopology: true,
useNewUrlParser: true,
},function(err, db) {
if (err) throw err;
var dbo = db.db("db");
dbo.collection("db").find({}).toArray(function(err, result) {
if (err) throw err;
console.log(result);
db.close();
});
});
let userSchema = require('./models/user.js');
// Get single user
app.get('/user/:id', function (req, res) {
userSchema.findById(req.params.id, (error, data) => {
if (error) {
return next(error)
} else {
res.json(data)
}
})
})
我得到標題中的錯誤(只需將mongooseSchemahere替換為userSchema)。 我做錯什么了? 我嘗試將userSchema聲明放在不同的位置,但沒有幫助。
您需要導出模型而不是模式。
const mongoose = require('mongoose');
const userSchema = mongoose.Schema({
loginId: String,
firstname: String,
lastname: String,
eMail: String,
password: String,
active: Boolean
});
module.exports = mongoose.model('user', userSchema);
現在您可以執行以下操作:
let User = require('./models/user.js');
// Get single user
app.get('/user/:id', function (req, res) {
User.findById(req.params.id, (error, data) => {
if (error) {
return next(error)
} else {
res.json(data)
}
})
})
您需要使用mongoose.connect來使用mongoose模型。
進行以下更改:
1-)像這樣創建用戶模型並導出:
const mongoose = require("mongoose");
const userSchema = new mongoose.Schema({
loginId: String,
firstname: String,
lastname: String,
eMail: String,
password: String,
active: Boolean
});
module.exports = mongoose.model("User", userSchema);
2-)更改App.js以將數據庫與mongoose.connect連接:
const express = require("express");
const app = express();
const mongoose = require("mongoose");
const User = require("./models/user");
const url = "mongodb://localhost:27017/mydb";
const port = process.env.PORT || 3000;
app.use(express.json());
mongoose
.connect(url, {
useNewUrlParser: true,
useUnifiedTopology: true
})
.then(() => {
app.listen(port, () => {
console.log(`App running on port ${port}...`);
});
})
.catch(error => console.log(error));
現在您可以創建一個這樣的用戶:
app.post("/user", function(req, res, next) {
console.log("Req body:", req.body);
User.create(req.body)
.then(result => {
console.log({ result });
res.send(result);
})
.catch(err => {
console.log(err);
res.status(500).send("something went wrong");
});
});
要通過_id檢索用戶,請執行以下操作:
app.get("/user/:id", function(req, res, next) {
User.findById(req.params.id, (error, data) => {
if (error) {
return next(error);
} else {
res.json(data);
}
});
});
要按名字檢索用戶:(如果要按名字查找所有用戶,請更改findOne來查找。):
app.get("/user/firstname/:firstname", function(req, res, next) {
console.log(req.params.firstname);
User.findOne({ firstname: req.params.firstname }, (error, data) => {
if (error) {
return next(error);
} else {
res.json(data);
}
});
});
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