CODEWITHSUNDEEP
entitydomain-driven-designrepository-patternddd-repositories
user4095212
user4095212

Reputation:

DDD: Should Repository validate Entity before persisting it?

Simple question: should Repository validate Entity before persisting it? Validate = check if all values match the rules (like Name is < 50 chars etc).

Upvotes: 3

Views: 1575

Answers (1)

Dennis Traub
Dennis Traub

Reputation: 51634

In DDD every Aggregate should be responsible for its validity. There should never be an object in an invalid state. i.e. every Aggregate should reject any mutation that would lead to an invalid state.

Quoting from a great article on the topic, Validation in a DDD World, by Jim Bogard:

Simply put, if we control the operation side of the equation, why in the world would we allow our entities to get into an invalid state? Life becomes much more complicated if we start having “IsValid” properties on our entities.

Upvotes: 8

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