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[英]Getting failed to configure cluster endpoints error when using DAX with DynamoDB
[英]My promise is undefined when getting dynamodb info for a key
每當我返回 promise 時,我都會得到 undefined。
async function getTask(){
const userName = 'jared'; //key name
const userTable = 'todoUsers'; //table name
async function getTask(){ //get list of tasks for key
const params = { //params for dynamodb.get
Key:{
"username": userName
},
TableName: userTable,
ConsistentRead: true,
};
return await dynamodb.update(params).promise().then(response => { //returning response
return response;
}, error =>{
console.log('There is an error getting task: ', error);
});
}
您提供的代碼似乎不正確,因為您定義了 getTask() 兩次。 我也不明白你為什么await
然后使用then
。
試試這個,看看返回是否被定義:
public static async getTask() {
const userName = 'jared'; //key name
const userTable = 'todoUsers'; //table name
const params = {
//params for dynamodb.get
Key: {
username: userName
},
TableName: userTable,
ConsistentRead: true
};
return documentClient.update(params).promise();
}
在我用try catch之后它起作用了。
async function getTasks(){
const userName = 'jared';
const userTable = 'todoUsers';
try {
var params = {
KeyConditionExpression: 'username = :user',
ExpressionAttributeValues: {
':user': userName
},
TableName: userTable
};
var result = await dynamodb.query(params).promise()
return JSON.stringify(result.Items);
} catch (error) {
console.error(error);
}
}
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