Hi! What is the best way to develop? Deploy dynamo...
# helpm
MAURICIO VALDIVIA MONZON
02/15/2021, 2:45 PMHi! What is the best way to develop? Deploy dynamodb or use dynmodb-local (https://www.npmjs.com/package/serverless-dynamodb-local) and why?
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Ross Coundon
02/15/2021, 4:12 PMWe find dynamodb-local very useful for development and local integration testing
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Seth Geoghegan
02/15/2021, 4:50 PMi'm in the process of building unit tests around my methods that talk to DDB. I'm hoping to mock out interactions with DDB entirely, so I don't need to rely on a functioning DDB interface.
Seth Geoghegan
02/15/2021, 4:51 PMHowever, I suspect i'll eventually need to use something like dynamodb-local for integration testing, since I have business logic built into my DynamoDB queries.
Seth Geoghegan
02/15/2021, 4:52 PMFor example, I have transactions that conditionally PUT an item to DDB while updating a count attribute on another item. I can't imagine how to test that logic by mocking out DDB entirely
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Ross Coundon
02/15/2021, 4:58 PMYeah, that’s exactly how we use it and mock out calls for unit tests
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MAURICIO VALDIVIA MONZON
02/15/2021, 5:07 PMNice! I'm having 2 problems with dynamo local. First the CI is "difficult", second if I use cognito with dynamo is difficult to develop because is not a cognito offline plugin.
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Ross Coundon
02/15/2021, 5:11 PMyeah, auth we’ve had to just test within AWS, not ideal, agreed.
What is it you’re finding difficult on the CI side? Spinning up the docker container?
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MAURICIO VALDIVIA MONZON
02/15/2021, 5:16 PM2 questions:
• Best way to manage the env
• We should test in a real dynamo or try in local dynamo in the ci
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Ross Coundon
02/15/2021, 5:18 PMWhich env are you referring to?
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MAURICIO VALDIVIA MONZON
02/15/2021, 5:20 PMFor example the table name. We use somehing like this notes-${stage}
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Ross Coundon
02/15/2021, 5:27 PMYou can do it using serverless-dotenv-plugin to set things like tableName. You could also use the built in .env support in serverless.
We use a TypeScript serverless configuration rather than yaml. That gives us tonnes of flexibility to add logic into how the serverless config is created
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MAURICIO VALDIVIA MONZON
02/15/2021, 5:32 PMTypeScript serverless configurationr
Ross Coundon
02/15/2021, 5:32 PMNo, serverless.ts
Ross Coundon
02/15/2021, 5:40 PMDocs are a bit sparse but there’s some info here:
https://www.serverless.com/framework/docs/providers/aws/guide/intro/#services
Ross Coundon
02/15/2021, 5:40 PMI find it makes setting up the definition much simpler as the IDE can guide you
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MAURICIO VALDIVIA MONZON
02/15/2021, 6:01 PMNice! Thank you!