注意:所有这些都发生在 DynamoDB 的本地实例上。
这是我在 DynamoDB Shell 中用来创建表的代码:
这是我在 DynamoDB Shell 中用来创建表的代码:
var params = {
TableName: "TABLE-NAME",
KeySchema: [
{ AttributeName: "pid",
KeyType: "HASH"
}
],
AttributeDefinitions: [
{ AttributeName: "pid",
AttributeType: "S"
}
],
ProvisionedThroughput: {
ReadCapacityUnits: 1,
WriteCapacityUnits: 1
}
};
dynamodb.createTable(params, function(err, data) {
if (err)
console.log(JSON.stringify(err, null, 2));
else
console.log(JSON.stringify(data, null, 2));
});
这是在node.js中被调用以向DB添加元素的函数:
function(request, response) {
params = {
TableName: 'TABLE-NAME',
Item: {
pid: 'abc123'
}
};
console.log(params);
dynamodb.putItem(params, function(err, data) {
if (err)
console.log(JSON.stringify(err, null, 2));
else
console.log(JSON.stringify(data, null, 2));
});
}
我得到的输出是:
{ TableName: 'TABLE-NAME',
Item: { pid: 'abc123' } } // THIS IS PARAMS
{
"message": "There were 7 validation errors:\n* InvalidParameterType: Expected params.Item['pid'] to be a structure\n* UnexpectedParameter: Unexpected key '0' found in params.Item['pid']\n* UnexpectedParameter: Unexpected key '1' found in params.Item['pid']\n* UnexpectedParameter: Unexpected key '2' found in params.Item['pid']\n* UnexpectedParameter: Unexpected key '3' found in params.Item['pid']\n* UnexpectedParameter: Unexpected key '4' found in params.Item['pid']\n* UnexpectedParameter: Unexpected key '5' found in params.Item['pid']",
"code": "MultipleValidationErrors",
"errors": [
{
"message": "Expected params.Item['pid'] to be a structure",
"code": "InvalidParameterType",
"time": "2015-11-26T15:51:33.932Z"
},
{
"message": "Unexpected key '0' found in params.Item['pid']",
"code": "UnexpectedParameter",
"time": "2015-11-26T15:51:33.933Z"
},
{
"message": "Unexpected key '1' found in params.Item['pid']",
"code": "UnexpectedParameter",
"time": "2015-11-26T15:51:33.933Z"
},
{
"message": "Unexpected key '2' found in params.Item['pid']",
"code": "UnexpectedParameter",
"time": "2015-11-26T15:51:33.933Z"
},
{
"message": "Unexpected key '3' found in params.Item['pid']",
"code": "UnexpectedParameter",
"time": "2015-11-26T15:51:33.933Z"
},
{
"message": "Unexpected key '4' found in params.Item['pid']",
"code": "UnexpectedParameter",
"time": "2015-11-26T15:51:33.934Z"
},
{
"message": "Unexpected key '5' found in params.Item['pid']",
"code": "UnexpectedParameter",
"time": "2015-11-26T15:51:33.934Z"
}
],
"time": "2015-11-26T15:51:33.944Z"
}
我不明白为什么它会获取键0、1、2、3、4和5,即使在前一行打印时它们并不存在。
另外,如何解决错误“Expected params.Item['pid'] to be a structure”?我已将其声明为字符串并尝试存储一个字符串!
其他注意事项:当我在shell上运行函数时,使用的相同代码正常工作。我还包括了aws-sdk,并按要求进行了配置:
var AWS = require('aws-sdk');
AWS.config.region = 'us-east-1';
AWS.config.endpoint = 'http://localhost:8000/'
var dynamodb = new AWS.DynamoDB();
put
在 http://docs.aws.amazon.com/AWSJavaScriptSDK/latest/AWS/DynamoDB.html 没有文档说明,当我尝试使用时,出现错误:"TypeError: dynamodb.put is not a function"。请帮忙检查一下。 - BlueMonkMN