[英]Mongoose populating array of subdocuments
Apologies if this has already been asked, my searches did not turn up the same situation. 抱歉,如果已经提出这个问题,我的搜索没有出现同样的情况。 I have two schemas something like the below: 我有两个类似下面的模式:
var experimentSchema = new mongoose.Schema({
name : 'string'
elements : [{
type : mongoose.Schema.ObjectId,
ref: 'Element'
}],
resources : [{
type : mongoose.Schema.ObjectId,
ref : 'Resource'
}],
})
var elementSchema = new mongoose.Schema({
name : 'string',
component : {
type : mongoose.Schema.ObjectId,
ref : 'Component'
}
})
I want to perform a deep population so that when I request an experiment I get an object with an array of elements
and resources
and for each of the elements the field component
has also been populated. 我想要执行一个深度填充,以便当我请求实验时,我得到一个具有elements
和resources
数组的对象,并且对于每个元素,还填充了字段component
。
I have tried a few things along the lines of: 我尝试过以下几点:
Experiment.findOne(query).populate(['resources','elements','elements.component']).exec(...)
without success. 没有成功。 Can anyone provide the correct syntax for this type of operation? 任何人都可以为这种类型的操作提供正确的语法吗?
Thanks in advance! 提前致谢!
hope this helps. 希望这可以帮助。
models.User.findOne(query)
.populate([{
path: 'elements',
populate: {
path: 'components',
model: 'Component'
}
},{
path:'resources'
}])
.exec(...)
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