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In the previous article, I described one approach to validation in DDD. Specifically, I showed how it applies the Result pattern in factory methods of Value Objects to be able to reuse the same guarding checks maintaining their invariants. A drawback...
If you have completed domain mode, your application is almost ready. You can start solving problems that your modeled domain was designed for right after. Just put a thin layer of logic in an application service API reading user input and communicati...
After completing the code for all Value Objects held by a customer, we can revisit the DDD-friendly model of the Customer Entity itself, which will impose one more invariant addition to all the invariants Value Objects are encapsulating. The domain e...
In the previous article, I introduced the concept of Value Objects as handy wrappers around primitive C# types. These objects ensure that they represent a valid value and enforce Customer invariants, which are the explicit and implicit rules that are...
Let me illustrate ideas laid out in previous articles with examples and show the actual code following all the promoted principles. You will see how easy it is to build complex systems by adhering to simple rules. Let’s pick up a domain. I chose spec...
I will keep talking about the core domain where all the rules are strictly enforced and any violation results in an exception. The core domain can be seen as an electric toy car without a cover and all the shields protecting it from the external worl...
We all write code to solve people’s problems, but we rarely think that every line or character of code adds to another class of problems that originate in our software. Before you know it, your solution to the original problem eventually becomes anot...
Achieving Clarity in the Chaos of Code
