Data validation

Data validation @heapdump In my previous blog post, I talked about command and command handler design patterns. I got several questions about data validation and how to give feedback to users. We are going to talk about several kinds of data validation in this blog post. We will start with domain validation, this validation ensures we can build our domain objects in a good state depending on business rules. Then, we will talk about command validation and how we can use it to give feedback to us...

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