Rails 5 ActionController::Parameters no longer inherits from Hash

[scarhand]

In Rails 5 ActionController::Parameters no longer inherits from Hash.

Therefor something like MyInteraction.run(params) will fail with the ArgumentError "inputs must be a hash".

[tfausak]

This is pretty similar to #379. There are a few workarounds in there. The easiest fix is to use params.to_unsafe_h. But perhaps we need a better story for this. What do you think, @AaronLasseigne?

[scarhand]

@tfausak yeah, that's the fix I'm using right now. Even if you decide not to fix this, it would be nice if the documentation would make notice of the workaround.

[AaronLasseigne]

This might be a big enough problem to warrant a fix. If not then we definitely should do as @scarhand suggests and update the docs.

We could check for this one specific class name and convert it rather than implementing a generic to_h (which I agree is not good).