Module: Authorization::AuthorizationHelper

Defined in:
lib/declarative_authorization/helper.rb

Instance Method Summary collapse

Instance Method Details

#has_role?(*roles, &block) ⇒ Boolean

While permitted_to? is used for authorization in views, in some cases content should only be shown to some users without being concerned with authorization. E.g. to only show the most relevant menu options to a certain group of users. That is what has_role? should be used for.

Examples:

<% has_role?(:sales) do %>
<%= link_to 'All contacts', contacts_path %>
<% end %>
...
<% if has_role?(:sales) %>
<%= link_to 'Customer contacts', contacts_path %>
<% else %>
...
<% end %>

Returns:

  • (Boolean) 


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# File 'lib/declarative_authorization/helper.rb', line 51

def has_role? (*roles, &block)
  controller.has_role?(*roles, &block)
end

#has_role_with_hierarchy?(*roles, &block) ⇒ Boolean

As has_role? except checks all roles included in the role hierarchy

Returns:

  • (Boolean) 


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# File 'lib/declarative_authorization/helper.rb', line 56

def has_role_with_hierarchy?(*roles, &block)
  controller.has_role_with_hierarchy?(*roles, &block)
end

#permitted_to?(privilege, object_or_sym = nil, options = {}, &block) ⇒ Boolean

If the current user meets the given privilege, permitted_to? returns true and yields to the optional block. The attribute checks that are defined in the authorization rules are only evaluated if an object is given for context.

Examples:

<% permitted_to? :create, :users do %>
<%= link_to 'New', new_user_path %>
<% end %>
...
<% if permitted_to? :create, :users %>
<%= link_to 'New', new_user_path %>
<% else %>
You are not allowed to create new users!
<% end %>
...
<% for user in @users %>
<%= link_to 'Edit', edit_user_path(user) if permitted_to? :update, user %>
<% end %>

To pass in an object and override the context, you can use the optional options:

permitted_to? :update, user, :context => :account

Returns:

  • (Boolean) 


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# File 'lib/declarative_authorization/helper.rb', line 31

def permitted_to? (privilege, object_or_sym = nil, options = {}, &block)
  controller.permitted_to?(privilege, object_or_sym, options, &block)
end