最初，該專案設定了 promise 支持，所有查詢都使用 promise，如 method.then().catch() 后來一些被轉換為 try-catch with async await。一切正常，直到幾周前突然有些方法停止作業，我嘗試將這些方法轉換為許多不同的變體，從 promise 到 callback 和 try-catch。await new Model(object).save() 不保存記錄。我正在使用 mongoose.createConnection 因為我需要連接到兩個資料庫。
這是我如何初始化我的資料庫
const mongoose = require("mongoose");
mongoose.Promise = require('bluebird');
function makeNewConnection(uri, id) {
const db = mongoose.createConnection(uri);
db.on("error", function(error) {
console.log(
`MongoDB :: connection ${this.name} :: ${id} ${JSON.stringify(error)}`
);
db.close().catch(() =>
console.log(`MongoDB :: failed to close connection ${this.name}`)
);
});
db.on("connected", async function() {
mongoose.set("debug", function(col, method, query, doc) {
console.log(
`MongoDB :: ${
this.conn.name
} :: ${id} ${col}.${method}(${JSON.stringify(query)},${JSON.stringify(
doc
)})`
);
});
console.log(`MongoDB :: connected ${this.name} :: ${id}`);
require("../models/notification.model");
if (process.env.DATABASE_ENV === "local" && id === "cloud") {
require("../helpers/data.sync.helper");
}
});
db.on("disconnected", function() {
console.log(`MongoDB :: disconnected ${this.name} :: ${id}`);
});
return db;
}
// Use
let local, cloud;
if (process.env?.DATABASE_ENV === "local") {
// Connect to local database
local = makeNewConnection(
`mongodb://${process.env.DATABASE_USER}:${process.env.DATABASE_PASS}@127.0.0.1:27017/Eyemasters?retryWrites=true&authSource=admin&useNewUrlParser=true&useUnifiedTopology=true&w=majority`,
"local"
);
// Connect to cloud database
cloud = makeNewConnection(
`mongodb://${process.env.DATABASE_USER}:${process.env.DATABASE_PASS}@64.227.44.132:27017/Eyemasters?retryWrites=true&w=majority`,
"cloud"
);
// Start Database sync helper
} else {
// Connect to cloud local database
local = makeNewConnection(
`mongodb://${process.env.DATABASE_USER}:${process.env.DATABASE_PASS}@localhost:27017/Eyemasters?retryWrites=true&w=majority`,
"local"
);
}
module.exports = {
local,
cloud
};
這是我的一個模型有問題。
const mongoose = require("mongoose");
mongoose.Promise = require('bluebird');
const { local, cloud } = require("../config/database.config");
const { genId } = require("../helpers/doc.id.generator");
const validator = require("validator");
const UserSchema = mongoose.Schema(
{
_id: mongoose.Schema.Types.ObjectId,
email: {
type: String,
required: true,
unique: true,
validate: {
validator: validator.isEmail,
message: "{VALUE} is not a valid email",
isAsync: false
}
},
hash: { type: String, bcrypt: true, rounds: 10 },
firstname: { type: String, required: true },
lastname: { type: String, required: true },
phone: { type: String },
dateOfBirth: { type: Date },
designation: { type: String },
role: { type: mongoose.Schema.Types.ObjectId, ref: "Role" },
passport: { type: String },
accountDetails: {
name: String,
number: Number,
bank: String
},
defaultBranch: {
type: mongoose.Schema.Types.ObjectId,
ref: "Branch"
},
branches: [{ type: mongoose.Schema.Types.ObjectId, ref: "Branch" }],
createdBy: {
type: mongoose.Schema.Types.ObjectId,
ref: "User"
},
lastModifiedBy: {
type: mongoose.Schema.Types.ObjectId,
ref: "User"
},
webpush: { type: Object },
inactive: { type: Boolean, default: true },
approved: { type: Boolean, default: false },
activationCode: { type: String, unique: true },
activationExpiresIn: { type: Date }
},
{ toJSON: { virtuals: true }, timestamps: true }
);
UserSchema.plugin(require("mongoose-bcrypt"));
genId(UserSchema);
UserSchema.pre("save", function(next) {
if (!this.createdBy) this.createdBy = this._id;
if (!this.lastModifiedBy) this.lastModifiedBy = this._id;
});
exports.User = exports.User || local.model("User", UserSchema);
exports.OnlineUser = exports.OnlineUser || cloud.model("User", UserSchema);
最后我的控制器設定；
exports.create = async (req, res) => {
// Validating entered data
if (
!req.body.firstname ||
!req.body.lastname ||
req.body.firstname.length < 3 ||
req.body.lastname.length < 3 ||
!req.body.email ||
!req.body.role ||
req.body.email.length < 3
) {
return res.status(400).send({
message: "Please fill in all required fields"
});
}
try {
const user = await User.findOne({
email: req.body.email.toLowerCase()
});
if (user) {
throw new Error("User with email " req.body.email " already exist");
}
console.log("Before create");
let newUser = new User({
...req.body,
activationCode: randtoken.uid(16),
activationExpiresIn: moment.utc().add(30, "minutes"),
email: req.body.email.toLowerCase()
});
console.log(newUser.save);
const userData = await newUser.save();
console.log("Saved");
let transaction = new DbTransaction({
transactionType: "insert",
modelName: "User",
data: userData,
clients: [process.env.DATABASE_CLIENT_ID],
isProcessed: false
});
await transaction
.save()
.then(d => console.log("Transaction updated successfully"))
await User.populate(userData, populateQuery, (err, data) => {
if (err) throw new Error(err);
return res
.status(201)
.send({ message: "User created successfully", user: data });
});
} catch (err) {
console.log(err);
console.log(err.kind);
return res.status(500).send({
message: err.message
});
}
};
我已經嘗試了基于 javascript promise 的作業流程的不同變體。像 Model.method().then().catch()，async try-await Model.method()-catch 和最后的回呼 Model.method((err, data)=>{ //do something })。
以上組合均無效。我的觀察是，mongoose 只是將“完成”記錄到此方法的控制臺中，但從未真正執行任何操作。
非常感謝您的幫助，我完全不知道為什么這不起作用。
謝謝你。
uj5u.com熱心網友回復：
對于所有努力提供幫助的人，感謝您的幫助。
我不知道為什么我在這里發帖后會看到這個問題。
問題出在模型設定中的中間件中沒有呼叫 next；
UserSchema.pre("save", function(next) {
if (!this.createdBy) this.createdBy = this._id;
if (!this.lastModifiedBy) this.lastModifiedBy = this._id;
});
用。。。來代替;
UserSchema.pre("save", function(next) {
if (!this.createdBy) this.createdBy = this._id;
if (!this.lastModifiedBy) this.lastModifiedBy = this._id;
next();
});
再次感謝大家的支持。
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