mongodb - 如何在mongodb中找到字符串和字符串数组

Question

我是 MongoDB 的初学者。

我想通过以下方式在 MongoDB 中查找文档favorite.foods.

这里是文件

{
  "_id":1,
  "favorite": {
    "color":"red",
    "foods":{
      "fruits":"banana",
      "fastfood":["burger", "sandwich"]
    }
  }
},
{
  "_id":2,
  "favorite": {
    "color":"green",
    "foods":{
      "noodles":"ramen",
      "fastfood":["fries", "burger", "corn dog"]
    }
  }
},
{
  "_id":3,
  "favorite": {
    "color":"red",
    "foods":{
      "soup":"cream soup"
    }
  }
}

我尝试过了

db.collectionName.find({"favorite.foods":{"fruits":"banana","fastfood":{"$all":["burger", "sandwich"]}}})

但找不到 id 1...

请帮我。

Answer 1

用点表示法。

db.collection.find({
  "favorite.foods.fruits": "banana",
  "favorite.foods.fastfood": {
    "$all": [
      "burger",
      "sandwich"
    ]
  }
})

示例 Mongo Playground