这是我的Couch DB文件
{"people": [{"id": 1,"dept_id": 1,"user": "A",},{"id": 2,"dept_id": 1,"user": "B",},{"id": 3,"dept_id": 1,"user: "C",}]}
用户A将他的dept_id更改为小袋DB中的3
{"people": [{"id": 1,"dept_id": 3,"user": "A",},{"id":2 ,"dept_id": 1,"user": "B",},{"id": 3,"dept_id": 1,"user": "C",}]}
用户B将他的dept_id更改为小袋DB中的4
{"people": [{"id": 1,"dept_id": 1,"user": "A"},{"id":2 ,"dept_id": 4,"user": "B"},{"id": 3,"dept_id": 1,"user": "C"}]}
如果A和B将数据复制到Couch DB,则使用
更新Couch文档{" people":[{" id":1," dept_id":1," user":" A"},{" id":2," dept_id":4,"用户":" B"},{& #34; id":3," dept_id":1,"用户":" C"}]}
但我的预期输出
{" people":[{" id":1," dept_id":3," user":" A"},{" id":2," dept_id":4,"用户":" B"},{& #34; id":3," dept_id":1,"用户":" C"}]}
我试过这个来更新小袋Db
var mydb = new PouchDB('localPouchDb',{revs_limit: 1, auto_compaction: true});db.upsert('people ', function myDeltaFunction(doc) { doc.dept_id=4 return doc;}).then(function () { console.log('success')}).catch(function (err) { console.log(err)});
我试过这个用沙袋来复制沙发Db
var remoteDB = new PouchDB('remote address',{revs_limit: 1, auto_compaction: true});db.replicate.to(remoteDB);
我搜索了一些链接,他们说
无法更新单个字段,复制替换 整个文件与囊db
https://www.tutorialspoint.com/couchdb/couchdb_updating_a_document.htm
答案 0 :(得分:1)
您无法做到。因为CouchDb允许将数据另存为JSON记录。因此,最后更新的记录将添加到bedDB中。
如果要针对特定功能执行此操作,请将其作为单独的文档