dbclient | 데이터배이스 관리 / 자동 메일링 / Admin 자동화 | Object-Relational Mapping library

you need to capitalise the first character of values inside struct field.

For Example:

If you want to map Java classes to DynamoDB tables (which is a useful feature), consider moving away from the old V1 API (com.amazonaws.services.dynamodbv2 is V1). V2 packages are software.amazon.awssdk.services.dynamodb.*.

Replace this old API with the DynamoDB V2 Enhanced Client. You can learn about this here:

Map items in DynamoDB tables

You can find code examples for using the Enhanced Client here.

Here is a Java V2 code example that shows you how to use the Enhanced Client to put data into a Customer table. As you see, you can map a Java Class to columns in a DynamoDB table and then create a Customer object when adding data to the table.

It doesn't conform because you declared another Error type inside the class, so everywhere where you use Error in the required methods, it uses DBClientMock.Error instead of the protocol-required Swift.Error.

Either rename DBClientMock.Error to something else, or change the Error in methods to Swift.Error, like below:

If you have configured the endpoint information in the configuration file, you do not need to use the hosting program to configure the endpoint information. Moreover, if the project created using the WCF service application template does not require a program to host it, it can be directly deployed to IIS.

This project can be deployed directly to IIS or run directly in VS.

Secondly, I suggest you use Add Service Reference to generate the client:

Finally, you can directly call the service through the automatically generated proxy class.

Found a solution that was acceptable for us

Call for the initialization

Looks like you're not setting _dbClient properly. You should call the db method on the client object with the database name as the argument.

FutureBuilder is an asynchronous request. Always check that snapshot has data before building your list. do:

From my understanding, it seems like dbHelper is null.

Are you initializing dbHelper anywhere because you haven't provided the code where you do so.

So, to put it simply, you need to put the code below somewhere in your app.

Couple of corrections:

• when passing values we need to pass the object with type. so, instead of user.userid.S pass entire user.userid. Since its not able to determine the type, it is assuming as an array and trying to get the first element of the array and resulting in that error.
• Numeric values, should simply be passed as String value of type 'N',like secondsLeft: { N: "49985" }

Here is the updated code.