MongoDB的 - 在文檔的列表更新對象

我有文件下面的列表中，List<Project> projectListMongoDB的 - 在文檔的列表更新對象

"projectsList": [ 
    { 
     "projectNumber": 1 
     "projectName": "kjsd", 
     "projectURL": "lkjsand", 
     "projectDate": "Oct 7, 2016 12:00:00 AM", 
     "projectOccupation": "kaijiuhdsa", 
     "projectProposal": "aus asdig agduya" 
    }, 
    { 
     "projectNumber": 2 
     "projectName": "alan walker", 
     "projectURL": "lkjsand", 
     "projectDate": "Oct 7, 2016 12:00:00 AM", 
     "projectOccupation": "kaijiuhdsa", 
     "projectProposal": "aus asdig agduya" 
    }, 
    { 
     "projectNumber": 3 
     "projectName": "", 
     "projectURL": "", 
     "projectOccupation": "", 
     "projectProposal": "" 
    } 

]

我有包含

Project oldProject= new Project("kjsd","lkjsand","Oct 7, 2016 12:00:00 AM","kaijiuhdsa","aus asdig agduya")

我需要更新兩個項目對象

Project newProject= new Project("kjsd","http","Oct 7, 2016 12:00:00 AM","kaijiuhdsa","ocr")

如何使用java驅動在mongoDB中用newProject更新oldProject r？

來源

2016-10-22 salah atwa

您在mongodb中的文檔是'projectList'對象還是'Project'對象？ – hyades

我的文檔項目列表 –

項目中的任何鍵都可以被認爲是唯一鍵嗎？ – hyades

我可以在MongoDB中回答。我想你可以將它轉換成適當的Java方法。

db.col.update(
    {"projectsList.projectNumber": 1}, 
    {$set: { 
     "projectsList.$.projectUrl": "http", 
     "projectsList.$.projectProposal": "ocr" 
    }})

來源

2016-10-22 11:53:26 hyades

MongoDB的 - 在文檔的列表更新對象

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