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如何使用javascript執行一個查詢和條件的多個更新?Rethinkdb通過一個查詢和條件進行多個更新
例如,我的文檔:
[
{
"Author": "Auto",
"Number": 5,
"RandomText": "dddbd",
"Tag": "Srebro",
"id": "10fbd309-5a7a-4cd4-ac68-c71d7a336498"
},
{
"Author": "Auto",
"Number": 8,
"RandomText": "cccac",
"Tag": "Srebro",
"id": "37f9694d-cde8-46bd-8581-e85515f8262f"
},
{
"Author": "Auto",
"Number": 6,
"RandomText": "fffaf",
"Tag": "Srebro",
"id": "b7559a48-a01a-4f26-89cf-35373bdbb411"
}
]
這是我的查詢:
UpdateIndex()
{
this.r.table(this.params.table).update((row) => {
let result;
console.log(this.r.expr([row]));
this.r.branch(
this.r.row(this.Index2).lt(10),
result = "Lucky",
result = "Good"
);
/*
if(this.r.row("Number").lt(3)) result = "Bad";
else if (this.r.row("Number").lt(5)) result = "Poor";
else if (this.r.row("Number").lt(10)) result = "Lucky";
else if (this.r.row("Number").lt(20)) result = "Good";
else if (this.r.row("Number").lt(50)) result = "Great";
else result = "Mystic";
*/
console.log(result);
return this.r.object(this.Index2, result);
}).run(this.conn, this.CheckResult.bind(this));
}
我爲什麼要這麼做?我創建了第二個索引(this.Index2 ='Opinion'),現在我想用我的條件描述的值來填充這個索引。 但每個文檔都是相同的值(例如:壞)。我如何更新文檔,但爲每個文檔和一個查詢運行條件?
謝謝你,現在的工作。我將閱讀關於lamda功能的這篇博客。 – InnerWorld