Mongoid查询以获取至少一个嵌入文档与条件匹配的所有父文档

Question

我在mongodb中有这些questions文档，并且可以在其中嵌入多个answers文档。我在rails app中使用mongoid。

{
  "_id" : ObjectId("5642993541021327d3000004"),
  "asked_to" : [ 
      "5642978841021327d3000000", 
      "564297f441021327d3000001"
  ], 
  "text": "What is your hobby?",
  "answers": [
    {
      "_id" : ObjectId("56429baf41021327d3000005"),
      "user_id": "5642978841021327d3000000",
      "type": "text",
      "text": "Playing soccer",
      "status": "active"
    },
    {
      "_id" : ObjectId("46429baf41021327d3000092"),
      "user_id": "564297f441021327d3000001",
      "type": "video",
      "video_url": "http://www.myvideo.com/ewkrjwert7",
      "status": "inactive"
    }
  ]
}


{
  "_id" : ObjectId("7642993541021327d30000022"),
  "asked_to" : [ 
      "9642978841021327d3000027", 
      "564297f441021327d3000001",
      "994297f441021327d3000002"
  ], 
  "text": "What is your name?",
  "answers": [
    {
      "_id" : ObjectId("26429baf41021327d3000004"),
      "user_id": "564297f441021327d3000001",
      "type": "text",
      "text": "John abc",
      "status": "inactive"
    },
    {
      "_id" : ObjectId("86429baf41021327d3000091"),
      "user_id": "9642978841021327d3000027",
      "type": "text",
      "text": "Mary Kay",
      "status": "inactive"
    },
    {
      "_id" : ObjectId("86429baf41021327d3000091"),
      "user_id": "994297f441021327d3000002",
      "type": "video",
      "video_url": "http://www.myvideo.com/khgfdiuweo",
      "status": "active"
    }
  ]
}

{
  "_id" : ObjectId("5642993541021327d3000004"),
  "asked_to" : [ 
      "5642978841021327d3000000", 
      "564297f441021327d3000001"
  ], 
  "text": "Where do you live?",
  "answers": [
    {
      "_id" : ObjectId("56429baf41021327d3000005"),
      "user_id": "5642978841021327d3000000",
      "type": "video",
      "text": "Playing soccer",
      "status": "active"
    },
    {
      "_id" : ObjectId("46429baf41021327d3000092"),
      "user_id": "564297f441021327d3000001",
      "type": "video",
      "video_url": "http://www.myvideo.com/ewkrjwert7",
      "status": "inactive"
    }
  ]
}

我想获取asked_to includes 564297f441021327d3000001所有问题文档，其中任何嵌入式答案文档都符合此条件user_id ==564297f441021327d3000001 type == text || status == active

所以在上面的例子中，使用我的条件，它应该返回我以上三个问题文档，因为每个问题，有一个符合这些条件的嵌入式文档

我尝试在这样的mongoid中编写查询，但当然它不会工作，因为我没有这样的or。：

questions.where(asked_to: '564297f441021327d3000001').and("answer.user_id": "564297f441021327d3000001").and("answer.status": "active" or "answer.type": "text" )

那么我怎样才能实现我的目标呢？