在CouchDB中鏈接文檔

Question

我在我的couch-db中有兩種類型的文檔（都在同一個數據庫中），現在我創建了一個視圖，它可以通過「_id」鏈接兩個文檔並使用沙發返回數據-db視圖URL。現在我想從map函數中獲取兩種類型的數據。文檔和代碼的類型如下所示。

文獻

department { 
       "_id": "1", 
       "department": "Computers", 
       "type": "Department", 
       "room_no": "102", 
       "HOD": "Mr. G Rahul", 
       "floor": "1st Floor" 
      } 

student { 
      "_id": "fdf370e2f43d4af1b505b8913502a5e4", 
      "_rev": "1-16df9a4cd45ca69009ab6c9767425a8e", 
      "student Name": "H Ravi", 
      "date_of_birth": "March 1, 1993", 
      "roll_no": "55", 
      "inter_marks": "820", 
      "secondary_marks": "420" 
      "department_id": "1", 
      "type": "student" 
     } 

function(doc) { 
      var id,department,student,hod,dob; 
      if(doc.type == 'student') { 
        id = doc.department_id; 
        dob = new Date(doc.date_of_birth) 
       student = doc;  
     } 
     if(doc.type == 'department') { 
      if(doc._id == 'id') { 
      hod = doc.HOD; 
       department = doc; 
     } 
     } 
    emit([dob,hod], {'_id': id,"student_doc": student,"depart_doc":department}); 
} 

第二如果條件沒有在上述功能執行地圖用功能。以上代碼僅爲地圖功能。

Answer 1

裹一個if語句中的兩個測試：

function(doc) { 
    var id,department,student,hod,dob; 
    if(doc.type) { 
     if(doc.type === 'student') { ... } 
     if(doc.type === 'department') { ... } 
    } 
    emit([dob,hod], {'_id': id,"student_doc": student,"depart_doc":department}); 
}