javascript - 返回父级，只有子级匹配嵌套对象

时间：2017-06-15 15:52:29

标签： javascript arrays

这是来自my previous question的后续问题。从我收到的答案中，我能够在一个对象数组中的嵌套对象中进行搜索。

请找到fiddle for example。 

var data = [
{
  'booking_name': 'gtec/1101822/lmikdy/ls-rmea/oss11',
  'asset_count': 2,
  'pdg': 'Invalid',
  'user_area': 'Invalid',
  'deployment_number': 'Invalid',
  'spoc': 'invalid',
  'release': 'Invalid',
  'start_date': '2017-06-12 00:00:00',
  'end_date': '2017-06-16 00:00:00',
  'asset_info': [
    {
      'bams_id': 'BAMS-1001423507',
      'hostname': 'GTVOSS11',
      'status': 10,
      'site_location': 'IEAT01 Tipperary',
      'rack_number': 'VIRTUAL RACK',
      'rack_u_position': 0,
      'manufacturer': 'EMC',
      'model': 'VM',

    },
    {
      'bams_id': 'BAMS-1001368001',
      'hostname': 'None',
      'status': 10,
      'site_location': 'IEAT01 Tipperary',
      'rack_number': 'VIRTUAL RACK',
      'rack_u_position': 0,
      'manufacturer': 'HP',
      'model': 'HP BL460C GEN8',

    }
],
'full_name': 'Invalid (invalid)',
'email_address': 'Invalid'
},
{
  'booking_name': 'gtec/1101822/lmikdy/ls-rmea/oss11',
  'asset_count': 2,
  'pdg': 'Invalid',
  'user_area': 'Invalid',
  'deployment_number': 'Invalid',
  'spoc': 'invalid',
  'release': 'Invalid',
  'start_date': '2017-06-12 00:00:00',
  'end_date': '2017-06-16 00:00:00',
  'asset_info': [
    {
      'bams_id': 'BAMS-1001423507',
      'hostname': 'GTVOSS11',
      'status': 10,
      'site_location': 'IEAT01 Tipperary',
      'rack_number': 'VIRTUAL RACK',
      'rack_u_position': 0,
      'manufacturer': 'EMC',
      'model': 'VM',

    }
],
'full_name': 'Invalid (invalid)',
'email_address': 'Invalid'
}];

这里当我搜索字符串'emc'时，该函数返回两个正确的对象。但'emc'作为'制造商'是在儿童对象中。并且每个子对象都不满足这种条件。我正在寻找的结果，例如'emc'，它应该返回2个父对象。第一个父对象应该只有一个孩子（另一个孩子的'hp'作为制造商）。第二个父对象应该有一个子节点，因为它匹配搜索字符串。

我尝试使用搜索结果创建一个新对象但无法使其正常工作。

如何仅使用满足给定搜索字符串的子项返回父对象？

这是chatlog on my previous question，可以帮助理解问题和要求。

2 个答案:

答案 0 :(得分：1)

您可以使用迭代和递归方法并返回检查结果，并在子项与搜索值匹配时构建新对象和数组。

＆＃13;
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function getValue(item) {
    if (Array.isArray(item)) {
        return item.reduce(iterA, undefined);
    }
    if (item && typeof item === 'object') {
        return iterO(item);
    }
    if (typeof item !== 'object' && item.toString().toLowerCase().indexOf(search) !== -1) {
        return item;
    }
}

function iterO(o) {
    var temp = Object.keys(o).reduce(function (r, k) {
            var value = getValue(o[k]);
            if (value) {
                r = r || {};
                r[k] = value;
            }
            return r;
        }, undefined);

    if (temp) {
        Object.keys(o).forEach(function (k) {
            if (!(k in temp)) {
                temp[k] = o[k];
            }
        });
    }
    return temp;
}

function iterA(r, a) {
    var value = getValue(a);
    if (value) {
        r = r || [];
        r.push(value);
    }
    return r;
}

var data = [{ booking_name: "gtec/1101822/lmikdy/ls-rmea/oss11", asset_count: 2, pdg: "Invalid", user_area: "Invalid", deployment_number: "Invalid", spoc: "invalid", release: "Invalid", start_date: "2017-06-12 00:00:00", end_date: "2017-06-16 00:00:00", asset_info: [{ bams_id: "BAMS-1001423507", hostname: "GTVOSS11", status: 10, site_location: "IEAT01 Tipperary", rack_number: "VIRTUAL RACK", rack_u_position: 0, manufacturer: "EMC", model: "VM" }, { bams_id: "BAMS-1001368001", hostname: "None", status: 10, site_location: "IEAT01 Tipperary", rack_number: "VIRTUAL RACK", rack_u_position: 0, manufacturer: "HP", model: "HP BL460C GEN8" }], full_name: "Invalid (invalid)", email_address: "Invalid" }, { booking_name: "gtec/1101822/lmikdy/ls-rmea/oss11", asset_count: 2, pdg: "Invalid", user_area: "Invalid", deployment_number: "Invalid", spoc: "invalid", release: "Invalid", start_date: "2017-06-12 00:00:00", end_date: "2017-06-16 00:00:00", asset_info: [{ bams_id: "BAMS-1001423507", hostname: "GTVOSS11", status: 10, site_location: "IEAT01 Tipperary", rack_number: "VIRTUAL RACK", rack_u_position: 0, manufacturer: "EMC", model: "VM" }], full_name: "Invalid (invalid)", email_address: "Invalid" }],
    search = 'emc',
    result = data.reduce(iterA, undefined);

console.log(result);
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.as-console-wrapper { max-height: 100% !important; top: 0; }
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答案 1 :(得分：1)

我不确定你的方法有多深，但这应该可以解决问题

当子项具有每行时，它将复制每一行，并仅使用匹配值替换该集

＆＃13;
＆＃13; 
function filterSet(dataSet, matchFn) {
  return dataSet.reduce((current, row) => {
    if (typeof row === 'object') {
      for (let prop in row) {
        if (Array.isArray(row[prop])) {
          var set = filterSet(row[prop], matchFn);
          if (set && set.length > 0) {
            // copy the row, replace the array property with the results
            current.push( Object.assign({}, row,
              { [prop]: set }
            ) );
            // since the full row is now in there
            // no need to check more
            break;
          }
        } else if (matchFn(row[prop])) {
            // copy not ref
            current.push( Object.assign( {}, row ) );
            break;
          }
      }
    }
    return current;
  }, []);
}

var data = [{
    'booking_name': 'gtec/1101822/lmikdy/ls-rmea/oss11',
    'asset_count': 2,
    'pdg': 'Invalid',
    'user_area': 'Invalid',
    'deployment_number': 'Invalid',
    'spoc': 'invalid',
    'release': 'Invalid',
    'start_date': '2017-06-12 00:00:00',
    'end_date': '2017-06-16 00:00:00',
    'asset_info': [{
        'bams_id': 'BAMS-1001423507',
        'hostname': 'GTVOSS11',
        'status': 10,
        'site_location': 'IEAT01 Tipperary',
        'rack_number': 'VIRTUAL RACK',
        'rack_u_position': 0,
        'manufacturer': 'EMC',
        'model': 'VM',

      },
      {
        'bams_id': 'BAMS-1001368001',
        'hostname': 'None',
        'status': 10,
        'site_location': 'IEAT01 Tipperary',
        'rack_number': 'VIRTUAL RACK',
        'rack_u_position': 0,
        'manufacturer': 'HP',
        'model': 'HP BL460C GEN8',

      }
    ],
    'full_name': 'Invalid (invalid)',
    'email_address': 'Invalid'
  },
  {
    'booking_name': 'gtec/1101822/lmikdy/ls-rmea/oss11',
    'asset_count': 2,
    'pdg': 'Invalid',
    'user_area': 'Invalid',
    'deployment_number': 'Invalid',
    'spoc': 'invalid',
    'release': 'Invalid',
    'start_date': '2017-06-12 00:00:00',
    'end_date': '2017-06-16 00:00:00',
    'asset_info': [{
      'bams_id': 'BAMS-1001423507',
      'hostname': 'GTVOSS11',
      'status': 10,
      'site_location': 'IEAT01 Tipperary',
      'rack_number': 'VIRTUAL RACK',
      'rack_u_position': 0,
      'manufacturer': 'EMC',
      'model': 'VM',

    }],
    'full_name': 'Invalid (invalid)',
    'email_address': 'Invalid'
  }
];

console.log(filterSet(data, (i) => {
  return i.toString().toLowerCase().indexOf('emc') >= 0;
}));

console.log(filterSet(data, (i) => {
  return i.toString().toLowerCase().indexOf('invalid') >= 0;
}));
＆＃13;
＆＃13;
＆＃13;

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