Foreign key name in DataMapper associations?

And not for the first time, I have found the answer to my own question thanks to Jan De Poorter's very helpful blog entry It is necessary to adjust the conventions when dealing with field names so that it simply uses the name of the symbol rather than using it's built-in smarts regarding underscores repository(:default).adapter. Field_naming_convention = lambda { |value| value.name. To_s } The foreign key name can then be specified as follows: class Invoice # bla bla... has n, :items, :child_key => :invoiceId end class Item # bla bla... belongs_to :invoice, :child_key => :invoiceId end It is worth noting (as shown above) that the key name needs to be specified on both sides of the relationship (which I find a little bit strange, but hey).

Hopefully this will help anyone else who finds themselves asking the same question. Thanks to Jan De Poorter for the answer.

And not for the first time, I have found the answer to my own question thanks to Jan De Poorter's very helpful blog entry. It is necessary to adjust the conventions when dealing with field names so that it simply uses the name of the symbol rather than using it's built-in smarts regarding underscores. Repository(:default).adapter.

Field_naming_convention = lambda { |value| value.name. To_s } The foreign key name can then be specified as follows: class Invoice # bla bla... has n, :items, :child_key => :invoiceId end class Item # bla bla... belongs_to :invoice, :child_key => :invoiceId end It is worth noting (as shown above) that the key name needs to be specified on both sides of the relationship (which I find a little bit strange, but hey). Hopefully this will help anyone else who finds themselves asking the same question.

Thanks to Jan De Poorter for the answer.

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