Rails - Jul 2009 - Associations over 37 different tables with has_one

Hi all,

I have 37 different tables with each having its own sort column (sort
implying that the main data of that table is sorted on that particular
column).  Each of these sort columns is different and unique.

To make things easier for myself I created an inheritance template where
each of the 37 tables inherits from one templated controller and one
templated model.  They all use the same methods.  So all 37
controllers/models are basically empty and the inherited/templated
controller and model contain the objects/methods.

I''m now creating a master table that needs to pull the data from each
of
those 37 tables and the sort columns, perform calculations, and then
save the refined calculations back to itself (the master table).

I''m trying to figure out a proper way to setup the associations.  All
I''m doing is gathering data from those tables to calculate further
values.  My master data table belongs to my team model and the rest of
the data tables belong to my team model.  The current associations are:

class Team < ActiveRecord::Base
  has_many    :master_tables
  has_many    :inheritance_templates
end


class MasterTable < ActiveRecord::Base
  belongs_to  :team
end

class InheritanceTemplate < ActiveRecord::Base
  self.abstract_class = true
  belongs_to  :team
end

class DataOne < InheritanceTemplate
end
class DataTwo < InheritanceTemplate
end
class DataThree < InheritanceTemplate
end

I''m not sure how the association should be setup between the Master
Table model and the Inheritance Template model.  They both belong to
team.

Assume that I want to retrieve the following:

DataOne.colomnonedata
DataTwo.columntwodata
DataThree.columnthreedata

I could do:

@one = DataOne.find(:all)
@two = DataTwo.find(:all)
@three = DataThree.find(:all)

and point to a custom method that searches for the specific column and
only returns results for that column but I figured there might be a
better approach to all of this.

Any help would be appreciative..
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The reason why I''m asking this is I''m thinking that perhaps
there''s "no
association" at all between the master table and the other tables.  The 
reason why I believe this is due to the fact that I''m pulling data from
those tables, changing them, and saving refined data to the master 
table.  Therefore, no columns from the tables I''m gathering data for 
belong to the master table.

However, the master table depends on the data from those tables in order 
to get its own numbers...

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Älphä Blüë wrote:
> Hi all,
> 
> I have 37 different tables with each having its own sort column
[...]
> I''m now creating a master table that needs to pull the data from
each of
> those 37 tables and the sort columns, perform calculations, and then
> save the refined calculations back to itself (the master table).
> 
> I''m trying to figure out a proper way to setup the associations. 
All
> I''m doing is gathering data from those tables to calculate further
> values.  My master data table belongs to my team model and the rest of
> the data tables belong to my team model.
[...]
> I''m not sure how the association should be setup between the
Master
> Table model and the Inheritance Template model.  They both belong to
> team.
It sounds like that''s all you need.  I don''t see why
InheritanceTemplate
would come into the associations

[...]
> Any help would be appreciative..
No, help would be appreciated.  You''d be appreciative of any help. :D
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> No, help would be appreciated.  You''d be appreciative of any help.
:D
LOL - thanks Marnen.  You would not believe how often my fiance corrects 
me on my improper use of words.. :)

I "appreciate" the help mate.

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