dkubb changed the topic of #datamapper to: Datamapper v1.2.0 | Mailing List: http://is.gd/aa9D | Logs: http://is.gd/qWAL7V | DataMapper 2 Renamed to ROM, see #rom-rb for development
<rtyler>
I'd rather the relationship property be nil than an exception <_<
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<Rager>
hi - I'm new to rails and want to use datamapper instead of activerecord - am I able to use the codegen tools that activerecord has for making models and such?
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<Eiam>
so no theories about how first_or_create would result in more than one copy?
<Eiam>
I'm see in this pop up in a few places now where first_or_create seems to somehow result in getting more than one instance of an object created in the db
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<namelessjon_>
Eiam: One possible explanation is that it's not called transactionally. Also, is the column you search on actually unique?
<Eiam>
namelessjon_: hmm well its property :id, Serial
<namelessjon_>
And the database is failing to enforce that?
<Eiam>
no, it looks like when I say first_or_create(:attr1=> "blah", :attr2=>"blah2")
<Eiam>
it will create one if one already exists with those same sets of attributes
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<Eiam>
here is what I know
<Eiam>
1) all interactions with model creation via DM use first_or_create
<Eiam>
2) I have a few cases where we have multiple entries with the same creation values that would have been created via first_or_create
<Eiam>
3) I tried to do some races myself (multiple at once from different sessions) and wasn't able to reproduce. I don't understand how these values are getting in, but I understand they shouldn't be there
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<namelessjon_>
Can you make that combination of columns unique on the database level? At least at that point you might get an error to help track things down
<namelessjon_>
I agree this seems like it shouldn't happen, just trying to figure out how to reproduce it. The first step of that seems to be 'find out when it happens'
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