[英]NodeJS Express Mongoose return empty []
我试图制作一个 MEAN 堆栈应用程序,但我的 API 无法提供我请求的数据。
服务器.js 文件:
const express = require("express");
const bodyparser = require("body-parser");
const mongoose = require('mongoose');
const dotenv = require('dotenv');
dotenv.config();
const port = process.env.PORT;
const dburi = process.env.DB_URI;
//Routes
const volcanoesRoute = require('./api/routes/volcano.routes');
mongoose.Promise = global.Promise;
mongoose.connect(
dburi,
{
useNewUrlParser: true,
useUnifiedTopology: true,
useFindAndModify: false,
useCreateIndex: true,
},
).then(
() => {
console.log('Connected to mongoDB');
},
(err) => console.log('Error connecting to mongoDB', err),
{ useNewUrlParser: true }
);
//Express app
const app = express();
app.use(bodyparser.json());
app.use(bodyparser.urlencoded({ extended: false }));
app.use('/api/vulcanoes', volcanoesRoute);
app.listen(port, () => {
console.log(`running at port ${port}`);
});
路线文件:
const express = require('express');
const volcanoController = require('../controllers/volcanoController');
const router = express.Router();
router.get('/getallvulcanoes', volcanoController.getAllVolcanoes);
module.exports = router;
Controller 档案:
const VolcanoSchema = require('../models/volcano.models');
const getAllVulcanoes = (req, res) => {
VolcanoSchema.find((err, results) => {
if (err) {
console.log(err);
res.status(500).json({message: err});
} else {
res.status(200).json(results);
}
});
};
module.exports = {getAllVolcanoes};
Model 文件
const mongoose = require('mongoose');
const VolcanoSchema = new mongoose.Schema({
Volcano_name:{
type: String,
},
Country:{
type: String,
},
Type:{
type: String,
},
Latitude:{
type: Number,
},
Longtitude:{
type: Number,
},
Elevation:{
type: Number,
},
});
module.exports = mongoose.model('Volcano', VolcanoSchema);
问题是我有一个工作示例,但大部分代码都已损坏......但它的响应总是给我这个
如果有人指出我做错了什么,那就太好了
编辑:我为我的数据库切换到 postgresql 希望这会起作用
您应该修复 Controller( VulcanoSchema.find
需要一个空的 object 作为参数):
Controller 档案:
const VulcanoSchema = require('../models/vulcano.models');
const getAllVulcanoes = (req, res) => {
VulcanoSchema.find({}, (err, results) => {
if (err) {
console.log(err);
res.status(500).json({message: err});
} else {
res.status(200).json(results);
}
});
};
module.exports = {getAllVulcanoes};
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