有没有办法指示模型总是填充某个字段?
类似于在任何查找查询中填充“字段”:
{field: Schema.ObjectId, ref: 'Ref', populate: true}
?
最佳答案
在 Mongoose 4.0 中,您可以使用查询 Hook 来自动填充您想要的任何内容。
以下示例来自 introduction document瓦莱里·卡尔波夫(Valeri Karpov)。
模式定义:
var personSchema = new mongoose.Schema({
name: String
});
var bandSchema = new mongoose.Schema({
name: String,
lead: { type: mongoose.Schema.Types.ObjectId, ref: 'person' }
});
var Person = mongoose.model('person', personSchema, 'people');
var Band = mongoose.model('band', bandSchema, 'bands');
var axl = new Person({ name: 'Axl Rose' });
var gnr = new Band({ name: "Guns N' Roses", lead: axl._id });
查询 Hook 以自动填充:
var autoPopulateLead = function(next) {
this.populate('lead');
next();
};
bandSchema.
pre('findOne', autoPopulateLead).
pre('find', autoPopulateLead);
var Band = mongoose.model('band', bandSchema, 'bands');
关于javascript - Mongoose .js : force always populate,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/21592351/