Hydration Functions are Too Eager

[axrs]

I've come across a situation with lazy model loading not updating simple hydration functions.

• Define three models (user, permissions, company)
• The company model definition defines a simple hydration for users (in the same company.clj file).
• The user model definition defines a simple hydration fo permissions (in the same user.clj file).

In the main execution path, we can select a single company, then invoke hydrate for users. The users model will be lazily loaded and hydrated. Awesome.

During the loading of users, a new ^:hydration function is loaded for the permissions. Unfortunately, the simple hydration method has already realized the delay; and thus doesn't know of the new permissions hydration function.

The fix I've come across is to put hydrations into a seperate file and ensure it's required by what needs it. This however feels counter intuitive when models can be resolved when required.

Thoughts?

[axrs]

When a model is resolved (in toucan.db/resolve-model-from-symbol), the delays could be converted to an atom and reset! or at least set! back to a delay

[axrs]

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