CanCan Ability: can read Class if he can read at leas one Object of class

Question

In cancan to be Able to :read all User for exemple we need

can :read,User

to be able to see a specific instance of the user we need

can :read, User do |user|
    user == something (condition satisfied ==> ability satisfied)
end

Now my question is : is it possible to check if the user can read at least one instance?? i have a menu where i have to show "users" in the menu if he can at least read one instance of a user otherwise not showing anything

I guess nobody's answering because the answer depends on the exact condition you're using. If accessibility can be expressed as a scope, it's dead-simple. — D-side, Oct 15 '15 at 09:02

score 0 · Accepted Answer · edited Oct 16 '15 at 03:24

0

This worked for me:

if User.accessible_by(current_ability,:read) > 0

edited Oct 16 '15 at 03:24

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answered Oct 15 '15 at 08:57

Ayoub

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CanCan Ability: can read Class if he can read at leas one Object of class

1 Answers1