Express.js & mongoose:使用bdhash设置默认值(异步)
Express.js & mongoose:使用bdhash设置默认值(异步)
提问于 2018-10-26 03:38:54
我如何在我的mongoose模式中为一个字段设置默认值(比如bdhash，它是异步的)？现在我只看到了内心的希望。但是为什么呢？看起来我使用async/await的方式是正确的。我也试着在一个钩子('validate')中这样做
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);有可能这样做吗？又是如何做到的？最好的方法:)
回答 1
Stack Overflow用户
发布于 2018-10-26 03:45:48
请参阅http://mongoosejs.com/docs/defaults.html
检查此示例：
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');
});页面原文内容由Stack Overflow提供。腾讯云小微IT领域专用引擎提供翻译支持
原文链接：
https://stackoverflow.com/questions/52996873
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