How to prevent editing of certain field in a model?

[Nick]

I have a model that I want certain admins to only be able to edit a single field on. I came across this PR in Cancancan and it looks promising, but I can't seem to get it to work with Rail Admin: https://github.com/CanCanCommunity/cancancan/pull/474

Things I've tried:

can :manage, MyModel, :myfield, user_id: user.id

can :manage, MyModel, user_id: user.id

cannot :manage, MyModel, :myfield

can :manage, MyModel, user_id: user.id

cannot :update, MyModel, :myfield

And several other combinations. Is it possible to prevent users from editing certain fields? Or is this not implemented for Rails Admin? If I wanted to do this, what is the best approach? I'm pretty new to Rails and Rails Admin so I don't have a great idea of what I'm doing.

Thanks

[Roc Khalil]

I thnk you can do something like this:

```

field :test do

   visible do

      bindings[:view]._current_user.admin?

   end

end

```

[Nick]

Thanks Roc. I came up with a similar solution last night after a little digging and it works:

field :test do

  visible do

    bindings[:controller].current_user.admin?

  end

end