javascript - 将对象数组分组并添加到复杂对象: Javascript

Question

我有一个复杂的对象，其中需要添加一些对象数组(基于字段分组并添加)

两者的格式如下所示

//This is the source object where I need to add the below "arr" based on grouping

let filterObj = {
      "feature": "test",
      "filter": {
                 "and": [
                          { "field": "field1","value": "1"}
                        ]
                }
};

//This array needs to be added to above object by grouping based on field
let obj = [
           {"field": "field1","value": "2"},
           {"field": "fiedl2","value": "3"},
           {"field" : "field2","value": "4"},
           {"field" : "field3","value" : "5"}
          ]

我希望输出采用以下格式:

var result = {
              "feature": "test",
              "filter": {
                 "and": [
                          {
                           "or" : [
                                    {"field": "field1","value": "1"},
                                    {"field": "field1", "value": "2"}
                                  ]                      
                          },
                          {
                            "or" : [
                                     {"field": "field2","value": "3"},
                                     { "field": "field2","value": "4"},
                                   ]                      
                          },
                          {  "field": "field3", "value": "5"}
                  ]
              } 
}

// The method that I have tried

filterObj.filter.and.or(...obj) ;// Does not work 

我需要根据字段值对它们进行分组，然后将它们添加到对象的“或”数组中(如果字段值相同)。如果没有直接将其添加到“and”对象数组中。

如果有帮助，我们将不胜感激。

Answer 1

• concat filter.and 和 obj 数组在一起。
• 减少结果数组。
• 使用每个字段作为键创建一个累加器。
• 如果该键已存在并且具有 or 属性，则将当前对象添加到 or 数组中。
• 如果键存在但没有 or 属性，则使用累加器中的现有对象和正在迭代的当前对象创建一个数组。
• 如果该键不存在，则添加该键并将其设置为当前对象。
• 然后使用 Object.values()在结果对象上获取 and 数组。

let filterObj={feature:"test",filter:{and:[{field:"field1",value:"1"}]}},
    obj=[{field:"field1",value:"2"},{field:"field2",value:"3"},{field:"field2",value:"4"},{field:"field3",value:"5"}];

const merged = obj.concat(filterObj.filter.and || []).reduce((r, o) => {
  if(r[o.field] && r[o.field].or) 
    r[o.field].or.push(o);
  else if(r[o.field])
    r[o.field] = { or: [r[o.field], o] }
  else
    r[o.field] = o;
 return r;
}, {})

const filter = { and: Object.values(merged) },
      { feature } = filterObj;

console.log({ feature, filter })

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