检查了AWS文档,但未找到任何有效示例。
这是我的尝试
var params = { TableName: "User", IndexName:"a-b-index", KeyConditionExpression: "Country = :country and #s = :status", FilterExpression: "Id IN (:e)", ExpressionAttributeValues: { ":country ": "USA", ":status": 1, ":e": "1" }, ExpressionAttributeNames: {"#s": "Status"} }; //get users dynamodb.query(params, function (err, data) { if (err) //error else { //success } });
有记录,但它正在获取具有ID的记录,1但我想使用这样的数组
1
var params = { TableName: "User", IndexName:"a-b-index", KeyConditionExpression: "Country = :country and #s = :status", FilterExpression: "Id IN (:e)", ExpressionAttributeValues: { ":country ": "USA", ":status": 1, ":e": ["1","2","3"] }, ExpressionAttributeNames: {"#s": "Status"} }; //get users dynamodb.query(params, function (err, data) { if (err) //error else { //success } });
如何使上面的代码成为work.want以获取记录。语法正确,查询运行没有错误,但我没有记录
请参考这个答案
摘要:-
对于“ IN”子句中的固定数量的值:
var params = { TableName : "Users", FilterExpression : "username IN (:user1, :user2)", ExpressionAttributeValues : { ":user1" : "john", ":user2" : "mike" } };
对于数组中的更多元素并动态形成FilterExpression:-
var titleValues = ["The Big New Movie 2012", "The Big New Movie"]; var titleObject = {}; var index = 0; titleValues.forEach(function(value) { index++; var titleKey = ":titlevalue"+index; titleObject[titleKey.toString()] = value; }); var params = { TableName : "Movies", FilterExpression : "title IN ("+Object.keys(titleObject).toString()+ ")", ExpressionAttributeValues : titleObject };