[英]AWS DynamoDB Transactions with JavaScript: One or more parameter values were invalid
[英]Invalid params in DynamoDB database query - Javascript - AWS
我正在使用AWS通过Cognito用户/ IAM角色和策略对dynamoDB进行数据库查询。
听起来我查询DynamoDB的参数无效。
我的错误:dynamodb.html:150 ValidationException:一个或多个参数值无效:条件参数类型与架构类型不匹配
我尝试添加: ProjectionExpression: "name"
因为它是我的属性之一,但是name
显然是保留字,因此我不能使用它。 我也尝试了age
因为它是我拥有的另一个属性,但是我得到了与上述相同的初始错误。 所以我已经删除了ProjectionExpression:
:。 这是我现在需要的参数:
var params = {
ExpressionAttributeValues: {
":v1": {
N: 123456788
}
},
KeyConditionExpression: "userId = :v1",
TableName: "user"
};
我不太确定该如何构架。 请让我知道我缺少什么或者是否有任何好的文档,因为我是AWS的新手。 先感谢您!
编辑:
主键是userId
,表user
的其余属性是: age
, bio
, email
, name
依次。
登录并以IAM角色查询
var data2 = {
UserPoolId: 'xxxxxxxx',
ClientId: 'xxxxxxxx',
};
var userPool = new AmazonCognitoIdentity.CognitoUserPool(data2);
var cognitoUser = userPool.getCurrentUser();
var userData = {
Username : 'xxxxxxxx',
Pool : userPool
};
var authenticationData = {
Username : 'xxxxxxxx',
Password : 'xxxxxxxx',
};
var authenticationDetails = new AmazonCognitoIdentity.AuthenticationDetails(authenticationData);
var cognitoUser2 = new AmazonCognitoIdentity.CognitoUser(userData);
cognitoUser2.authenticateUser(authenticationDetails, {
onSuccess: function (result) {
var accessToken = result.getAccessToken().getJwtToken(); //user sign-in success and you can get accessToken and IdToken
//POTENTIAL: Region needs to be set if not already set previously elsewhere.
AWS.config.region = 'xxxxxxxx';
AWS.config.credentials = new AWS.CognitoIdentityCredentials({
IdentityPoolId : 'xxxxxxxx', // your identity pool id here
Logins : {
// Change the key below according to the specific region your user pool is in.
// Here you need to map your idToken with your user pool domain for Cognito Identity Pool to generate a Identity with credential.
'cognito-idp.xxxxxxxx.amazonaws.com/xxxxxxxx' : result.getIdToken().getJwtToken()
}
});
//refreshes credentials using AWS.CognitoIdentity.getCredentialsForIdentity()
AWS.config.credentials.refresh((error) => {
if (error) {
console.error(error);
} else {
console.log('Successfully logged!');
// Instantiate aws sdk service objects now that the credentials have been updated. So put your DynamoDB client here
var docClient = new AWS.DynamoDB.DocumentClient({ region: AWS.config.region });
var params = {
ExpressionAttributeValues: {
":v1": {
N: 123456788
}
},
KeyConditionExpression: "userId = :v1",
TableName: "user"
};
docClient.query(params, function(err, data2) {
if (err) {
console.error(err);
}else{
console.log(data2);
}
});
}
});
},
onFailure: function(err) {
alert(err.message || JSON.stringify(err));
},
});
尝试在ExpressionAttributeValues
使用不带N
,并使用"
作为用户ID值。
var params = {
ExpressionAttributeValues: {
":v1": "123456788"
},
KeyConditionExpression: "userId = :v1",
TableName: "user"
};
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