node.js dynamodb 节点 aws-sdk 简单的 getItem() 调用
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dynamodb node aws-sdk simple getItem() call
提问by Cmag
Folks, New to Javascript... trying to do simple dynamo queries from node:
伙计们，Javascript 新手……尝试从节点执行简单的发电机查询：
var AWS = require('aws-sdk');
AWS.config.update({region: 'us-east-1'});
var db = new AWS.DynamoDB();
var params = {
"TableName" : 'admins',
"Key" : [
{ "username" : { "S" : "foo" } },
],
}
db.getItem(params, function(err, data) {
console.log('error: '+ err);
console.log(data);
return next();
res.send(data);
});
}
Output:
输出：
error: UnexpectedParameter: Unexpected key 'username' found in params.Key['0']
Thanks! Any help would be greatly appreciated!
谢谢！任何帮助将不胜感激！
采纳答案by Diana
I was trying to do it as it was suggested in the documentation, but also got errors.
我试图按照文档中的建议去做，但也出现了错误。
At the end the following worked:
最后，以下工作：
var aws = require('aws-sdk');
var db = new aws.DynamoDB({
region: 'eu-central-1',
maxRetries: 1
});
exports.handler = event => {
return queryMyThings();
}
const queryMyThings = async (event) => {
var params = {
Key: {
"ColumnByWhichYouSearch": {
S: "ValueThatYouAreQueriing"
}
},
TableName: "YourTableName"
};
return await db.getItem(params).promise();
}
回答by Cmag
Must follow the SDK and Docs, its simple: http://docs.aws.amazon.com/amazondynamodb/latest/APIReference/API_GetItem.html
必须遵循 SDK 和 Docs，它很简单：http: //docs.aws.amazon.com/amazondynamodb/latest/APIReference/API_GetItem.html
var params = {
AttributesToGet: [
"password"
],
TableName : 'foo',
Key : {
"username" : {
"S" : "bar"
}
}
}
db.getItem(params, function(err, data) {
if (err) {
console.log(err); // an error occurred
}
else {
console.log(data); // successful response
res.send(data);
}
return next();
});
回答by Hanny
Here are great resources for DynamoDB using NodeJS:
以下是使用 NodeJS 的 DynamoDB 的重要资源：
