Created
May 17, 2011 18:33
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| class ScheduleGroup < ActiveRecord::Base | |
| include AbstractGroup | |
| has_and_belongs_to_many :schedules | |
| end | |
| class Schedule < ActiveRecord::Base | |
| has_and_belongs_to_many :schedule_groups | |
| end | |
| module AbstractGroup | |
| before_destroy :removable? | |
| def removable? | |
| self.schedules.empty? # self.collection.empty? | |
| end | |
| end |
Author
nurey
commented
May 17, 2011
via email
g = ScheduleGroup.new(:name=>'test')
TypeError: can't convert Symbol into Array
from /Volumes/Devel/manager/app/models/abstract_group.rb:11:in `concat'
from /Volumes/Devel/manager/app/models/abstract_group.rb:11:in`grouping'
from /Volumes/Devel/manager/app/models/schedule_group.rb:3:in `<class:ScheduleGroup>'
from /Volumes/Devel/manager/app/models/schedule_group.rb:1:in`<top (required)>'
…On 2011-05-17, at 3:00 PM, samuelkadolph wrote:
``` ruby
module AbstractGroup
extend ActiveSupport::Concern
included do
class_inheritable_accessor :groupings
self.groupings = []
before_destroy :removable?
end
module ClassMethods
def grouping(*attributes)
groupings.concat(*attributes)
end
end
def removable?
self.class.groupings.all? { |grouping| send(grouping).empty? }
end
end
```
##
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Sorry, make that groupings.concat(associations).
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