Question

我将以下集合附加到aldeed：simple schema

public List<int[][]> AllSharesForFiles (int n , int k,List<File> file) {

    sharesHolder = new LinkedList<int[][]>();
    try{    

        for(int i=0;i<file.size();i++) {

            byte[]secret = f.readingTheFile(file.get(i));  // We call the method which read the file

            //method which evaluate the shares of each byte of the file   
            shar1= s.calculateThresholdScheme(secret, n,k,new    RndGeneratorAllAlgorithm(new RandomGeneratorSHA1()),two);

            sharesHolder.add(shar1);
        }

    } catch (IOException e) {

        e.printStackTrace();

    }   

    return sharesHolder;
}

/*Look for the possibilities to return a 2D array instead of one dimensional array
 * 
 */
public List<int[][]> AllSharesForEachFile (int n , int k,List<int [] []> f) {

    sharesHolder1 = new LinkedList<int[][]>();
    int s=f.size();
    int l=f.get(1)[0].length;     

    for (int i = 0; i < n; i++) {

        someValue=new int[s][l];

        for(int j=0;j<f.size(); j++){

            someValue[j]=f.get(j)[i];

        }
        sharesHolder1.add(someValue);
    }



    return sharesHolder1;
}

实际文件如下所示：

Posts = new Mongo.Collection("posts");

Posts.attachSchema(new SimpleSchema({
    samplePost:{
        type:String,
        max:500
    },
    createdAt:{
        type: Date,
        autoValue: function(){
            return new Date()
        }
    },
    "comments.$.reply":{
        type:String
    },
    "comments.$.commentId":{
        type: String,
        autoValue: function(){
            var tempCommentId = new Meteor.Colletion.ObjectID();
            return tempCommentId.str;
        }
    },
    "comments.$.commentCreatedAt": {
        type: Date,
        optional: true,
        autoValue: function(){
            return new Date()
        }
    },
});

现在我试图用带有$ pull的文档中的commentId：“ccc”删除第二条评论

{
    "_id": "aaa",
    "samplePost": "Hello world!",
    "comments": [
        {
            "reply": "Goodbye",
            "commentId": "bbb", 
            "createdAt": "2016-06-19T19:06:17.931Z"
        },
        {
            "reply": "Good morning",
            "commentId": "ccc"
            "createdAt": "2016-06-19T19:05:17.931Z"
        },
    ]
}

这不起作用。我把问题缩小到了

"click #delete-comment": function(event, template){
    var tempCommentId = $(event.target).parent().find('#commentIdPass').text();     //commentId is collected from HTML view
    Posts.update(
        {_id: template.data._id},   //_id is collected from the url param
        {$pull:{
            comments: {
                commentId: tempCommentId
            }}
        });
},

架构。如果我删除此架构，我可以删除评论。那么，为什么这会导致从数组中拉出整个注释项的问题。有任何想法吗？任何解决方法？

Answer 1

尝试此查询：

。

db.getCollection（ 'MYTEST'）更新（{ “_编码”： “AAA”}，{ “$拉”：{ “评论”：{ “commentId”： “CCC”}}}）;

Answer 2

发现问题。因为我怀疑附加架构是罪魁祸首。我需要为使用autovalue方法插入和更新模式设置条件。架构应如下所示：

"comments.$.commentCreatedAt": {
    type: Date,
    autoValue: function () {
        if (this.isInsert) {
            return new Date;
        }
    }
},

Mongodb从附加到简单模式的数组中拉出来

2 个答案: