在Firebase数据库React Native中返回值的子级数

Question

我正在尝试从Firebase数据库中获取数据。但是，每次获取数据时，对于数据库中的子计数次数，我都会得到相同的值。

在这种情况下，我想获取键值并将其推入数组

data.forEach((vals) => {
   keys.push(vals.key)
})

但是在每个索引的键数组中，我获得了子级的整个键值，而不是一个单独的索引中的每个键值，如何解决此问题。

预期输出：

[
"-LHvNl1cADFEwkyzRb7n",
"-LHw6EX2Nf8vGhIUwLr4",
"-LHwnhCA86JX6H3iDtUZ"
]

我现在得到的是：（

[
    "-LHvNl1cADFEwkyzRb7n",
    "-LHw6EX2Nf8vGhIUwLr4",
    "-LHwnhCA86JX6H3iDtUZ"
    ]

[
    "-LHvNl1cADFEwkyzRb7n",
    "-LHw6EX2Nf8vGhIUwLr4",
    "-LHwnhCA86JX6H3iDtUZ"
    ]

[
    "-LHvNl1cADFEwkyzRb7n",
    "-LHw6EX2Nf8vGhIUwLr4",
    "-LHwnhCA86JX6H3iDtUZ"
    ]

[
    "-LHvNl1cADFEwkyzRb7n",
    "-LHw6EX2Nf8vGhIUwLr4",
    "-LHwnhCA86JX6H3iDtUZ"
    ]

[
    "-LHvNl1cADFEwkyzRb7n",
    "-LHw6EX2Nf8vGhIUwLr4",
    "-LHwnhCA86JX6H3iDtUZ"
    ]

[
    "-LHvNl1cADFEwkyzRb7n",
    "-LHw6EX2Nf8vGhIUwLr4",
    "-LHwnhCA86JX6H3iDtUZ"
    ]

JSON数据

"21-jul-2018" {
  "-LHvNl1cADFEwkyzRb7n" : {
    "hotel" : "B2C",
    "items" : {
      "Dosai" : {
        "count" : 2,
        "header" : "Dosai",
        "image" : "https://firebasestorage.googleapis.com/v0/b/annam-6e679.appspot.com/o/Deals%2FDosai?alt=media&token=3d105c54-e2c2-4a78-9de5-792b5c82a170",
        "key" : "B2C",
        "name" : "B2C",
        "offerPrice" : "2.00",
        "price" : "2.38"
      },
      "shawaramas" : {
        "count" : 1,
        "header" : "shawaramas",
        "image" : "https://firebasestorage.googleapis.com/v0/b/annam-6e679.appspot.com/o/Specials%2Fshawaramas?alt=media&token=eb1ec339-9803-4c75-888e-908f9fe1abb6",
        "key" : "B2C",
        "name" : "B2C",
        "price" : "4.48"
      }
    },
    "key" : "-LHvNl1cADFEwkyzRb7n",
    "status" : 0,
    "time" : "11:19:47",
    "user" : "ashwin20@gmail.com"
  },
  "-LHw6EX2Nf8vGhIUwLr4" : {
    "hotel" : "B2C",
    "items" : {
      "Idly" : {
        "count" : 2,
        "header" : "Idly",
        "image" : "https://firebasestorage.googleapis.com/v0/b/annam-6e679.appspot.com/o/Deals%2FIdly?alt=media&token=1022e77d-d114-448b-8f71-c3b67e578ad6",
        "key" : "B2C",
        "name" : "B2C",
        "offerPrice" : "1.36",
        "price" : "2.36"
      },
      "shawaramas" : {
        "count" : 1,
        "header" : "shawaramas",
        "image" : "https://firebasestorage.googleapis.com/v0/b/annam-6e679.appspot.com/o/Specials%2Fshawaramas?alt=media&token=eb1ec339-9803-4c75-888e-908f9fe1abb6",
        "key" : "B2C",
        "name" : "B2C",
        "price" : "4.48"
      }
    },
    "key" : "-LHw6EX2Nf8vGhIUwLr4",
    "status" : 0,
    "time" : "09:12:52",
    "user" : "ashwin20@gmail.com"
  },
  "-LHwnhCA86JX6H3iDtUZ" : {
    "hotel" : "B2C",
    "items" : {
      "shawaramas" : {
        "count" : 1,
        "header" : "shawaramas",
        "image" : "https://firebasestorage.googleapis.com/v0/b/annam-6e679.appspot.com/o/Specials%2Fshawaramas?alt=media&token=eb1ec339-9803-4c75-888e-908f9fe1abb6",
        "key" : "B2C",
        "name" : "B2C",
        "price" : "4.48"
      }
    },
    "key" : "-LHwnhCA86JX6H3iDtUZ",
    "status" : 0,
    "time" : "12:27:08",
    "user" : "ashwin20@gmail.com"
  }
}

我的代码

this.path = firebase.database().ref('orders').child(dateformat(new Date(), 'dd-mmm-yyyy').toLowerCase())
    this.path.on('value', (data) => {
        var list = data.val();
        var items = [];
        for(var key in list) {
            var item = list[key];
            item.key = key;
            items[items.length] = item;
        }
       // var key = Object.keys(data.val());
        items.forEach((data) => {
            keysVal.push(data.key)
        })
        keysVal.forEach((key) => {
            this.newPath = firebase.database().ref('orders').child(dateformat(new Date(), 'dd-mmm-yyyy').toLowerCase()).child(key).child('items')
            this.newPath.on('value', snap => {
                snap.forEach((names) => {
                    vals.push(names.key)
                    this.newPath.child(names.key).on('value', data => {
                        itemsNames.push(data.val())
                     // console.log(data.val())
                    })

                })
            })
        })