syntax error for null column.type_cast_code

[damianham]

In activerecord/lib/active_record/attribute_methods/read.rb define_read_method() if column.type_cast_code('v') returns nil then you get a syntax error when the code is evaluated because the resulting access_code ends with "&& ;"

[tenderlove]

type_case_code should never return nil. Are you using mysql2 with edge rails by chance?

[damianham]

yes I am

[tenderlove]

If you're working against edge rails, please use edge mysql2. We've moved the database adapter from mysql2 in to rails master. That should fix this problem! :-)

[damianham]

well I hate to be a pedant but this wasn't helpful. I am not a rails core committer - just a rails user that hit a problem that others will hit and tried to be helpful with a 1 line fix. Going by this quote from the Rails 3 release notes at http://guides.rubyonrails.org/3_0_release_notes.html

"On top of all that, we’ve tried our best to deprecate the old APIs with nice warnings. That means that you can move your existing application to Rails 3 without immediately rewriting all your old code to the latest best practices."

I don't think it unreasonable to expect to be able to use the mysql2 gem with my rails 3 application. I found zero info when searching for various combinations of "use edge mysql2". So how do I how "use edge mysql2" with edge rails ? and wouldn't it be better to include this simple 1 line fix that tests for this case rather than just blow up if things aren't the exact way you want them ?

[tenderlove]

The Rails Gemfile in master clearly works against the unreleased version of the mysql2 gem. If you are going to work against edge rails, you need to work against the dependencies listed in our Gemfile.