[英]Express.js & mongoose: set default value with bdhash (async)
How can I set default value (like bdhash
which is async) to one field in my mongoose schema? 如何在猫鼬模式中为一个字段设置默认值(例如bdhash
是异步的)? Now I see only promise inside. 现在我只看到内心的希望。 But why? 但为什么? Seems that I'm using async/await in a right way. 似乎我正在以正确的方式使用异步/等待 。 Also I tried to do this in a hook (' validate
') 我也试图在一个钩子中做到这一点(“ validate
”)
const mongoose = require('mongoose');
mongoose.Promise = global.Promise;
bcrypt = require('bcrypt');
hashIt = async () => {
let pwd = new Date();
pwd = pwd.toUTCString() + Math.random();
return await bcrypt.hash(pwd, Number(process.env.SALT_WORK_FACTOR));
};
const businessSchema = new mongoose.Schema(
{
name: {
type: String,
trim: true,
unique: 'Please enter a unique business name',
required: 'Please enter a business name'
},
salt: {
type: String,
trim: true,
default: () => {
return hashIt();
},
required: 'Please enter a business salt'
},
created: {
type: Date,
default: Date.now
}
},
{
toJSON: { virtuals: true },
toObject: { virtuals: true }
}
);
/* Also tried this way
businessSchema.pre('validate', next => {
if (this.salt) {
return next();
}
this.salt = hashIt();
next();
}); */
module.exports = mongoose.model('Business', businessSchema);
Is it possible to do? 有可能吗? And how? 如何? The best way :) 最好的方法 :)
see http://mongoosejs.com/docs/defaults.html 参见http://mongoosejs.com/docs/defaults.html
Check this example : 检查这个例子:
var schema = new Schema({
title: String,
genre: {type: String, default: 'Action'}
});
var Movie = db.model('Movie', schema);
var query = {};
var update = {title: 'The Terminator'};
var options = {
// Create a document if one isn't found. Required
// for `setDefaultsOnInsert`
upsert: true,
setDefaultsOnInsert: true
};
Movie.
findOneAndUpdate(query, update, options, function (error, doc) {
assert.ifError(error);
assert.equal(doc.title, 'The Terminator');
assert.equal(doc.genre, 'Action');
});
声明:本站的技术帖子网页,遵循CC BY-SA 4.0协议,如果您需要转载,请注明本站网址或者原文地址。任何问题请咨询:yoyou2525@163.com.