如何从firebase数据库中读取子部分-Howtoreadasubsectionfromafirebasedatabase

I am using this code to access a Firebase Database, but I am cannot figure out how to read the sub array of strings. (the JSON structure is below)). The code I have returns the top level items, but not the list of strings. Would someone be able to assist with this issue?

我使用此代码访问一个Firebase数据库，但我不知道如何读取字符串的子数组。(JSON结构如下)。我的代码返回的是顶级项，而不是字符串列表。有人能帮助解决这个问题吗?

Here is my function to read from the DB:

下面是我从DB中读取的函数:

func sizes(userId: String = Auth.auth().currentUser!.uid, success: @escaping ([Sizes]) -> ()) {
        let ref = Router.sizes.reference()
        let query = ref.queryOrdered(byChild: "name")   //userId)
        query.observe(.value, with: { snapshot in
            var array = [Sizes]()
            for child in snapshot.children {
                if let size = Mapper().map(JSON: (child as! DataSnapshot).value as! [String : AnyObject]) {
                    array.append(size)
                }
            }
            success(array)
        })
    }

My Firebase JSON is as follows:

我的Firebase JSON如下:

{
  "-SzCat_001": {
   "name": "Womans",
    "sizeCategories": {
      "name": "Pants",
      "sizeDescriptor": [
        "00",
        "0",
        "2",
        "4",
        "6",
        "8",
        "10",
        "12",
        "XL"
      ]
    }
  }
}

And this is what I get returned?

这就是我得到的回报?

[0] = { name = "Womans" sizeCategories = 0 values {} }

[0] = {name = "Womans" sizecateg= 0 values {}

I am trying to figure out how to read the sizeCategories list of strings as a subarray of sizes.

我想弄明白如何将字符串的sizecateg卤素列表作为大小的子数组来读取。

Here is my definition of sizes and sizeCategories:

以下是我对尺寸和尺寸的定义:

struct Sizes: Mappable {

    var name: String = ""
    var sizeCategories = [SizeCategories]()

    init() {
    }

    init?(map: Map) {
    }

    mutating func mapping(map: Map) {
        name <- map["name"]
        sizeCategories <- map["sizeCategories"]
    }
}

struct SizeCategories: Mappable {

    var name: String = ""
    var sizeDescriptor = [String]()

    init() {
    }

    init?(map: Map) {
    }

    mutating func mapping(map: Map) {
        name <- map["name"]
        sizeDescriptor <- map["sizeDescriptor"]
    }
}

Thanks for any help!!!

感谢任何帮助! ! !

1 个解决方案

var sizeCategories = [SizeCategories]()

"sizeCategories": {
  "name": "Pants",
  "sizeDescriptor": [
    "00",
    "0",
    "2",
    "4",
    "6",
    "8",
    "10",
    "12",
    "XL"
  ]
}