mongoosejs:从不同的模式填充objectId的数组

我没有对此进行测试，但是有解决此问题的可能方法:Outer.findOne({title: 'LOOK AT MY CHILDREN!'}).populate({ path: 'refD', model: 'InnerOne'}).populate({ path: 'refD', model: 'InnerTwo'}).exec(function(err,res){ if(err) console.log(err); console.log(res);});I'm testing out an idea and have made some contrived examples for discussion. I have the following schema's models:var outerSchema = new Schema({ title: String, refD: [{type: Schema.ObjectId, ref: 'InnerOne'}, {type: Schema.ObjectId, ref: 'InnerTwo'}]});var innerOneSchema = new Schema({ title: String});var innerTwoSchema = new Schema({ turtle:String});var Outer = mongoose.model('Outer', outerSchema);var InnerOne = mongoose.model('InnerOne', innerOneSchema);var InnerTwo = mongoose.model('InnerTwo', innerTwoSchema);I have successfully pushed an example of each of these to Mongo. This has resulted in three collections with a refD array that includes the ObjectId's of the innerOne and innerTwo objects, looking good from mongo's point of view:{ "_id" : ObjectId("56625b7c752995f505637864"), "title" : "LOOK AT MY CHILDREN!", "refD" : [ ObjectId("56625b7c752995f505637862"), ObjectId("56625b7c752995f505637863") ], "__v" : 1}However when I use the populate command as so:Outer .findOne({title: 'LOOK AT MY CHILDREN!'}) .populate('refD') .exec(function(err,res){ if(err) console.log(err); console.log(res); });the result is as follows:{ refD: [ { __v: 0, title: 'Im the first type inside!', _id: 56625b7c752995f505637862 } ], __v: 1, title: 'LOOK AT MY CHILDREN!', _id: 56625b7c752995f505637864 }So structurally this is correct however it looks as though the populate function has only populated the first of the two types.Am I pushing the limits of what can be performed or is there a way to handle the population of different objects?I had considered using discriminators to make ALL models children of a single parent class but I would prefer not to, if I do that I may as well use a relational database.------EDIT------At this point it doesn't seem like this is doable without modifying or creating a plug in. For anyone who was thinking the same thing I decided for now I would go back to a more traditional approach, I've created a relatedRecordSchema that stores an Id and a record type and some other useful metadata. This essentially pushes the logic for population up to the app. In my use case this isn't so bad as I don't always want to populate all of the various related records but for the application or user to decide on the fly.This isn't an answer so I will leave the question open hoping someone takes the initiative and builds a plugin ;)CheersB 解决方案 To my knowledge populate works for one Schema. You could try to run the populate two times to the 'refD' by giving different model parameter.More information about populate: Mongoose populateI didn't test this through, but possible way to solve this problem: Outer.findOne({title: 'LOOK AT MY CHILDREN!'}).populate({ path: 'refD', model: 'InnerOne'}).populate({ path: 'refD', model: 'InnerTwo'}).exec(function(err,res){ if(err) console.log(err); console.log(res);}); 这篇关于mongoosejs:从不同的模式填充objectId的数组的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持！