我想使用mongoose虚拟填充来获取数据但是对于嵌套数组但是没有按预期工作 -

以下是我的架构 -

// schema for organisation structure
var OrganisationStructureSchema = new mongoose.Schema({
    _id: { type: Schema.ObjectId },
    Description: { type: String }        
});

// First nested array schema
var EmploymentRoleSchema = new mongoose.Schema({
        _id: {type: mongoose.Schema.ObjectId,
        LocationId: { type: Schema.ObjectId }            
});

// Create the virtual to populate
EmploymentRoleSchema.virtual('Location', {
  ref: 'OrganisationStructure',
  localField: 'LocationId',
  foreignField: '_id'
});

// Parent object schema
var PersonSchema = new mongoose.Schema({
   _id: mongoose.Schema.ObjectId,
   EmploymentRoles = [EmploymentRoleSchema]
});

If I get person object like this it does not populate the virtual location property

PersonelModel.findOne({_id: 1}).populate({path:    'EmploymentRoles.Location'}).exec();

But if change nested schema from array to object as follows it works

// Updated parent object schema change from array to object
var PersonSchema = new mongoose.Schema({
   _id: mongoose.Schema.ObjectId,
   EmploymentRoles = {EmploymentRoleSchema}
});

Now on running following code populate the location virtual property

PersonelModel.findOne（{_ id：1}） . populate（{path：'EmploymentRoles.Location'}） . exec（）;

填充虚拟不适用于数组属性吗？

以下文章似乎表明它应该工作 -

http://thecodebarbarian.com/mongoose-virtual-populate.html

http://mongoosejs.com/docs/populate.html（填充虚拟部分）

谢谢，

mongoose