Question

我正在查询firebase实时数据库，将每个结果存储在一个数组中，然后返回此数组。虽然数据是正确的，但我没有按照我希望它的类型返回它。

此功能的代码是

exports.getprojects = functions.https.onRequest((req, res) => {
  const uid = req.body.uid;
  var projectref = fref.child('projects');
  var projarr = [];

  // Make the promise object for query
  const projpromise = projectref.orderByChild('key').equalTo(uid).once('value');
  // Another Promise for pushing to array
  const pushpromise = projpromise.then(snap => {
    var proj_item = snap.val();

    // push to array
    projarr.push(proj_item);
    return proj_item;
  }).catch(reason => {
    console.log(reason)
    return res.json(400);
  })

  // Respond with array
  return pushpromise.then((proj_item) => {
    return res.json(200, projarr);
  }).catch(reason => {
    console.log(reason)
    return res.json(400);
  })
});

此函数查询所有正确的数据，但返回的格式如下：

[
   {
    "project_id": {
        "project_title": "Test Project1",
        "project_type": "Long Term"
    },

    ... 
]

我需要的是这个函数以下面的格式返回：

{
   {
    "project_id": {
        "project_title": "Test Project1",
        "project_type": "Long Term"
   },

    ...
}

我怎样才能做到这一点？任何帮助表示赞赏。谢谢！

Answer 1

要将数组转换为仅包含键值对的JSON对象，请执行以下操作：

var array = [
    {"project_id": {
        "project_title": "Test Project1",
        "project_type": "Long Term"
    }},
    {"project_id2": {
        "project_title": "Test Project2",
        "project_type": "Medium Term"
    }},
    {"project_id3": {
        "project_title": "Test Project3",
        "project_type": "Short Term"
    }}
];

var result = {};

array.forEach(function(object) { 
  var key = Object.keys(object)[0];
  result[key] = object[key];
})

console.log(result);

返回firebase数组返回元组而不是数组

1 个答案: