On 28 August 2010 17:01, dev2 <[email protected]> wrote:
> When I automigrate these models I don't get the results I expect.
> After migrating the person table now has included the fields from the
> doctor table which seems incorrect to me as most of the entries in the
> person table won't have 'doctor' properties. My purpose of using STI
> is to make it easier to create/update a doctor person. The way I do
> it now I save the person data and if that succeeds then I create an
> entry in the doctor table with the corresponding person_id. Any
> help?
STI is Single Table Inheritance. Note the single in the name :)
For the data layout you want, you could have the Doctor model belong_to
:person. (which actually, looking at it, you have the property there
already). For saving models, if you wrap in a transaction, that should solve
potential for inconsistency issues.
require 'dm-transactions'
Person.transaction do
if @person.save
@doctor = Doctor.new
@doctor.person = @person
unless @doctor.save
raise "Transaction failed" # rollback transaction
end
else
raise "Transaction failed" # rollback transaction
end
end
Regards
Jon
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