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To see all available qualifiers, see our documentation.
As of CanCan 1.6, when you have MetaWhere installed, it is possible to use those queries in abilities.
can :read, Project, :priority.lt => 3 can :update, Article, :published_at.not_eq => nil
The & and | joining are not supported yet but hopefully will be soon. If you are interested in helping add this please see the issue tracker.
&
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