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问题:
Is there a way to declare attr_accessible for multiple roles without a ton of duplication?
If I have several user roles, and each role is allowed to edit a different subset of attributes, here's what my attr_accessible declaration looks like:
attr_accessible :first_name, :last_name, :active, :as => :admin attr_accessible :first_name, :last_name, :as => :manager attr_accessible :first_name, :last_name, :as => :guest
I'd like to either
- A) define an array of accessible attributes that can be shared among different roles or
- B) define an array of roles than can access the same attributes
Is this possible?
回答1:
All ruby code is still just ruby code... and is thus infinitely hackable. eg
ROLES = [:admin, :manager, :support, :user, :guest] ACTIVE_ROLES = [:admin, :support] ROLES.each do |role| fields = [:first_name, :last_name] fields += [:active] if ACTIVE_ROLES.include?(role) attr_accessible *fields, :as => role end
回答2:
I just spent a long time trying to figure out the best way to do this. It seemed strange that the rails folk would expect you to duplicate a whole bunch of code!
After some digging around in the rails source, it turns out you can simply pass an array to assign attributes to multiple roles at once (:default being the default Active Record role)
attr_accessible :name, :email, :as => [ :default, :admin ] attr_accessible :featured, :as => :admin
No messy ruby arrays in your model!
回答3:
Did you try something like:
COMMON_FIELDS = [:first_name, :last_name] attr_accessible COMMON_FIELDS | [:active, :as => :admin] attr_accessible COMMON_FIELDS | [:as => :manager] attr_accessible COMMON_FIELDS | [:as => :guest]
Another possible way (untested):
attr_accessible :first_name, :last_name ADMIN_ACCESSIBLE = [:active] MANAGER_ACCESSIBLE = [] GUEST_ACCESSIBLE = [] protected def mass_assignment_authorizer if role == :all self.class.protected_attributes else super + (eval("#{role}_accessible".upcase) || []) end end
