的MongoDB：移動領域的新文件和更新領域和陣列

Collection.find({ $and: [ {title: { $exists: true}}, {reference: { $exists: true }} ]}).pretty()

這給我與結構的一些文件：的MongoDB：移動領域的新文件和更新領域和陣列

{ 
    "_id" : "EJBFtZ7EeGbBPwJaw", 
    "title" : "title", 
    "reference" : "8uujF9pivpGA37oQc", 
    "parent" : "v7DJzq859XX4kvKPi", 
    "ancestors" : [ 
     "v7DJzq859XX4kvKPi" 
    ] 
}

現在我要改變所有文件的方式：

將標題移至新文檔並
將parent id更新爲新文檔
推新標識的祖先（在第一位置！）

結果應該是：

{ 
    "_id" : "gzRn4nDKfeewb8EYE", // new document 
    "title" : "title",    // moved title 
    "parent" : "v7DJzq859XX4kvKPi", 
    "ancestors" : [ 
     "v7DJzq859XX4kvKPi" 
    ] 
}, 
{ 
    "_id" : "EJBFtZ7EeGbBPwJaw", // removed title 
    "reference" : "8uujF9pivpGA37oQc", 
    "parent" : "gzRn4nDKfeewb8EYE", // update parent id to new id 
    "ancestors" : [ 
     "gzRn4nDKfeewb8EYE",  // add new id at first pos 
     "v7DJzq859XX4kvKPi" 
    ] 
}

所以我在想什麼的是類似的東西：

Collection.find({ $and: [ {title: { $exists: true}}, {reference: { $exists: true }} ]}).forEach(function(doc) { 
    // get data from source 
    var id  = doc.id; 
    var title = doc.title; 
    var parent = doc.parent; 

    // insert new document 
    var newId = Collection.insert({ 
     title: title, 
     parent: parent, 
     ancestors: [parent] 
    }); 

    // update source document 
    if (newId) { 
     Collection.update(
      { _id: id }, 
      { 
       $set: { parent: newId }, // update parent id 
       $push: { ancestors: newId } // update ancestors array 
       $unset: { title: '' }  // remove title 
      } 
     );  
    } 

});