Andy Tolle wrote in post #991031:
> For example:
> Currently I have:
> functions < functions_competencies < competencies
> exams < exam_competencies < competencies
>
> I'd like to dry up "functions_competencies" and "exam_competencies" by
> using a polymorphic association, by let's say 'attached_competencies':
>
> functions < attached_competencies < competencies
> exams < attached_competencies < competencies
> evaluations < attached_competencies < competencies
> ...
>
> Note that these are join tables.
>
> Is this possible?
IIRC, this is based on the has_many_polymorphs plugin
class appl
has_many :appllinks
has_many :projects,
:through => :appllinks,
:source => :project,
:conditions =>? "appllinks.appllinkable_type = 'Project'"
has_many :scenarios,
:through => :appllinks,
:source => :scenario,
:conditions =>? "appllinks.appllinkable_type = 'Scenario'"
has_many :unittests,
:through => :appllinks,
:source => :unittest,
:conditions =>? "appllinks.appllinkable_type = 'Unittest'"
class appllink
belongs_to :appl
belongs_to :appllinkable, :polymorphic => true
belongs_to :project,
:class_name => 'Project',
:foreign_key => 'appllinkable_id'
belongs_to :scenario,
:class_name => 'Scenario',
:foreign_key => 'appllinkable_id'
belongs_to :unittest,
:class_name => 'Unittest',
:foreign_key => 'appllinkable_id'
class project
has_many :appllinks, :as => :applinkable, :dependent => :destroy
has_many :appls, :through => :appllinks
classes scenario and unittest are just like project
YMMV
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