validation

A Word On Validation

For a while, I have been battling with where validation should occur, and who is responsible for ensuring that the information in a command is good data. For the first layer of data validation, I am...

User Cannot* Create Patron That Fails Validation**

Creating a patron (by which I mean, issuing a command such that some process somewhere will instantiate an actual Patron entity, and perhaps persist it in some useful manor) is all well and good,...