Rails - Jan 2007 - rake test:x recreates tables in MySQL with server (not database) charset and collation

Any thoughts on how to avoid this problem? Already tried:

1. Setting the charset and collation in migration 001 - no effect:

  def self.up
    db_name = ActiveRecord::Base::connection.current_database()
    execute "ALTER DATABASE #{db_name} CHARACTER SET utf8 COLLATE
utf8_bin"
  end

2. Setting the charset and collation on each table individually - no
effect:
   {:options=>"engine=InnoDB CHARACTER SET utf8 COLLATE utf8_bin"}

Note that development and production environments work fine with
database default, migration 001, or setting per each table. Only the
test db, specifically after a rake test:units run has this problem.

Repro:

1. Create DB (MySQL 5.0.24a)
CREATE DATABASE foobar CHARACTER SET utf8 COLLATE utf8_bin;

2. Run migration (Rails 1.2)

3. Verify database and all tables have charset utf8 and collation of
utf_bin: yes.
select @@character_set_server, etc...
----------------------  ------------------  ------------------------
--------------------
latin1                  latin1_swedish_ci   utf8
utf8_bin

4. Run rake test:units. Tests fail as side-effect of incorrect
collation.

5. Verify database and all tables have charset utf8 and collation of
utf_bin: no - database still has correct settings but each table is now
latin1_swedish_ci.

Ideally I''d like to run the rake test:x''s without touching
schema at
all - unless it''s going to mimic _exactly_ what can happen to
production, i.e. never drop or create the DB and only alter schema
through migration files.

Short of that, any ideas on just getting past this would be great. My
next step will be to create a shell script that just runs every
*_test.rb file. Or maybe revert back to Ant. ;)


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I''ve since realized that the rake test tasks probably use the schema 
dump mechanism - not migrations - to drop and recreate the DB; I''d 
surmise that http://dev.rubyonrails.org/ticket/4751 is at least 
related to this problem with test DB''s.

For the moment, I shoved a hack into mysql_adapter to read and use 
character sets and collations when recreating DB''s. I suspect there 
probably needs to be a better long term solution (or at least a better 
coded and tested one.)

The full diff for the above follows (there''s a couple obvious problems 
with this code and probably many non-obvious ones - don''t use this 
anywhere that counts):

Index: activerecord/lib/active_record/connection_adapters/
mysql_adapter.rb
==================================================================---
activerecord/lib/active_record/connection_adapters/
mysql_adapter.rb	(revision 6045)
+++ activerecord/lib/active_record/connection_adapters/
mysql_adapter.rb	(working copy)
@@ -305,12 +305,14 @@
       end

       def recreate_database(name) #:nodoc:
+        settings = select_one(''SELECT @@character_set_database AS 
charset, @@collation_database AS collation'')
         drop_database(name)
-        create_database(name)
+        create_database(name, settings)
       end

       def create_database(name) #:nodoc:
-        execute "CREATE DATABASE `#{name}`"
+        settings_sql = " CHARACTER SET
#{settings[''charset'']} COLLATE
#{settings[''collation'']}"  if (settings)
+        execute "CREATE DATABASE `#{name}` #{settings_sql}"
       end

       def drop_database(name) #:nodoc:
-- end diff


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