Why are ActiveRecord scopes not merged ?

May 26th, 2008

Does anyone know why ActiveRecord does not merge joins when using scopes ?

Scopes are wonderful, thanks for has_finder and named scopes, but joins aren’t supported. This code:

raises an ActiveRecord::StatementInvalid complaining that a specified column could not be found. The column can’t be found because the join was dropped on the floor, instead of being merged.

The change me and Marc-André are proposing to make is this:

This is based on Rails 2.0.2, but Rails Edge has the same problem. So, any ideas ?

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I am François Beausoleil, a Ruby on Rails coder. During the day, I work on XLsuite. At night, I am interested many things. Read my biography

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