通過引用修改Javascript對象

Question

我正在嘗試爲mongoDB的aggregate框架創建一個複雜的查詢。它需要一個編程添加$and和$or的組件。

這是我對象的當前結構：

const inputObject = { 
    "details.blackBottom": { "in": ["A","B","C","D"] }, 
    "details.blackTop": { "in": ["L","M"] }, 
    "details.redBottom": { "in": ["A","B","C","D"] }, 
    "details.redTop": { "in": ["L","M"] }, 
    "details.greenBottom": { "in": ["A","B","C","D"] }, 
    "details.greenTop": { "in": ["L","M"] } 
} 

然而，對象是有用的，我需要的，以便它使用兩個$or和$and重新制定它。最終的輸出應該是這樣的：

const outputObject = { 
    "$and": [ 
     { 
      "$or" : [ 
       {"details.blackBottom": { "in": ["A","B","C","D"] }}, 
       {"details.redBottom": { "in": ["A","B","C","D"] }}, 
       {"details.greenBottom": { "in": ["A","B","C","D"] }} 
      ] 
     }, 
     { 
      "$or" : [ 
       {"details.blackTop": { "in": ["L","M"] } }, 
       {"details.redTop": { "in": ["L","M"] } }, 
       {"details.greenTop": { "in": ["L","M"] } } 
      ] 
     } 
    ] 
} 

注意，$or組件由Bottom和Top分組。

如何將inputObject變成所需的outputObject？

Answer 1

你可以做，隨着filter和map相結合的方法：

const inputObject = { 
 
    "details.blackBottom": { "in": ["A","B","C","D"] }, 
 
    "details.blackTop": { "in": ["L","M"] }, 
 
    "details.redBottom": { "in": ["A","B","C","D"] }, 
 
    "details.redTop": { "in": ["L","M"] }, 
 
    "details.greenBottom": { "in": ["A","B","C","D"] }, 
 
    "details.greenTop": { "in": ["L","M"] } 
 
} 
 

 
const outputObject = { 
 
    $and: ["Bottom", "Top"].map(side => ({ 
 
     $or: Object.keys(inputObject) 
 
        .filter(key => key.endsWith(side)) 
 
        .map(key => ({ [key]: inputObject[key] })) 
 
    })) 
 
}; 
 

 
console.log(outputObject);

.as-console-wrapper { max-height: 100% !important; top: 0; }