undefined method `adapter_name' for nil:NilClass

[medvedev84]

I'm trying to use activeuuid with rails 4.0.0. I have created migration according to example, then run it and got a error: "undefined method `adapter_name' for nil:NilClass".

Then I checke stacktrace and found next:
undefined method adapter_name' for nil:NilClass at /activeuuid-0.4.0/lib/activeuuid/patches.rb:11:inblock in uuid'
/activeuuid-0.4.0/lib/activeuuid/patches.rb:10:in each' /activeuuid-0.4.0/lib/activeuuid/patches.rb:10:inuuid'

When I opened patches.rb file I have found next row:
type = @base.adapter_name.downcase == 'postgresql' ? 'uuid' : 'binary(16)'

It seems like @base variable have not been initialized and I have no idea whre it from! Since I'm working with mysql, I just commented this row and inserted new one:
type = 'binary(16)'

But this is just a ugly hack, which should be fixed.

[damncabbage]

So activerecord-4.0.0/lib/active_record/connection_adapters/abstract/schema_definitions.rb defines ActiveRecord::ConnectionAdapters::Table and ...::TableDefinition.

The problem is that Table does have a @base, but TableDefinition doesn't. At the bottom of activeuuid-0.4.0/lib/activeuuid/patches.rb we have:

ActiveRecord::ConnectionAdapters::Table.send :include, Migrations if defined? ActiveRecord::ConnectionAdapters::Table
ActiveRecord::ConnectionAdapters::TableDefinition.send :include, Migrations if defined? ActiveRecord::ConnectionAdapters::TableDefinition

Same method inclusion, different host class with differing interface. Table doesn't have a way to tell what database it's running under, so I'm not sure how to fix it.

The Postgres adapter has native UUID column support; it's perhaps useful to look to that for inspiration as to how to emulate it for the others, instead of monkey-patching Table and TableDefinition directly.

[patchfx]

I managed to overcome this error by changing the line to:

type = ActiveRecord::Base.connection.adapter_name.downcase == 'postgresql' ? 'uuid' : 'binary(16)'