Hellos
Working on a project I came across the scenario that certain attributes
should only be accessible if the model instance is in a certain state.
Here's a completely fake example:
class Car < ActiveRecord::Base
attr_accessible :name, :color
private
def mass_assignment_authorizer(role)
accessible = super
accessible += [:location] if state == :parked
accessible += [:driver, :passengers] if state == :driving
accessible
end
end
Similar to the "if" option of "validates", a nicer way to do something like
this would be:
class Car < ActiveRecord::Base
attr_accessible :name, :color
attr_accessible :driver, :passenger, if: -> {|car| car.state == :driving }
end
Or:
class Car < ActiveRecord::Base
attr_accessible :name, :color
attr_accessible :driver, :passenger, if: 'driving?'
def driving?
state == :driving
end
end
Would such a feature make sense - or is there maybe an existing mechanism
to achieve this without abusing "mass_assignment_authorizer"?
Cheers!
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