Og's answer to migrations?

Ruby Apps Nitro
1

I was just thinking about this, say you’re building an address book app.
At first you give every address one phone number, but people start
complaining and so you want to add a separate table for phone numbers so
an address can have n phone numbers. Naturally you want to keep your
data. Does Og have any functionality whatsoever to assist here?

If you’re familiar with Og, how would you do this?

(ab)

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2

just write a small script:

for u in User.all
PhoneNumber.create(u.phone, u)
end

then just call alter table drop column to remove the uneeded column.

-g.

3

Wouldn’t the success of this example depend on the “PhoneNumber”
structure’s
relationship with “User”?

Also, I’m a little curious about how (or indeed IF) different instances
of
structures are associated, linked and otherwise understood.

A long time ago, I had a question about how to explicitly open two
distinct
tables of the same class – Migration is a good use case for that. I
didn’t
really get a comfortable answer. In fact having two Og instances of the
same Object type tended (at that tiem) to be problematic.

Eg.
a = PhoneNumber.new( “/usr/pathone” )
b = PhoneNumber.new( “/usr/pathTwo” )

  Aggregated_customers = PhoneNumber.new( "/usr/pathall" )

Is that any easier these day?

:slight_smile: