Mongoose 预保存未使用鉴别器运行

Question

我正在尝试在猫鼬中保存所有者之前调用预保存钩子。不调用预保存挂钩。有什么办法吗？

const baseOptions = {
    discriminatorKey: '__type',
    collection: 'users'
}
const Base = mongoose.model('Base', new mongoose.Schema({}, baseOptions));

const Owner = Base.discriminator('Owner', new mongoose.Schema({
    firstName: String,
    email: String,
    password: String,

}));

const Staff = Base.discriminator('Staff', new mongoose.Schema({
    firstName: String,     
}));

这不叫

 Owner.schema.pre('save', function (next) {
    if (!!this.password) {
        // ecryption of password
    } else {
        next();
    }
})

Answer 1

AFAIK 挂钩需要在编译您的模型之前添加到您的架构中，因此这不起作用。

但是，您可以先为鉴别器创建架构，然后定义挂钩，最后从基本模型和架构创建鉴别器模型。 请注意，对于鉴别器钩子，也会调用基本模式钩子。

更多细节在猫鼬文档的这个部分：

MongooseJS Discriminators Copy Hooks

对于您的情况，我相信这会起作用：

const baseOptions = {
    discriminatorKey: '__type',
    collection: 'users'
}
const Base = mongoose.model('Base', new mongoose.Schema({}, baseOptions));

// [added] create schema for the discriminator first
const OwnerSchema = new mongoose.Schema({
    firstName: String,
    email: String,
    password: String,
});

// [moved here] define the pre save hook for the discriminator schema
OwnerSchema.pre('save', function (next) {
    if (!!this.password) {
        // ecryption of password
    } else {
        next();
    }
})

// [modified] pass the discriminator schema created previously to create the discriminator "Model"
const Owner = Base.discriminator('Owner', OwnerSchema);

const Staff = Base.discriminator('Staff', new mongoose.Schema({
    firstName: String,     
}));