Forum: Ruby on Rails Error: uninitialized constant MysqlCompat::MysqlRes

0de642a74820349aa5f6162ce9b7d26f?d=identicon&s=25 Martin J. (mja)
on 2009-07-31 21:00
Hi,
I installed the "kwatch-mysql-ruby" gem on my Debian server but when I
try to run the "db:migrate" task I get the following error:

** Invoke db:migrate (first_time)
** Invoke environment (first_time)
** Execute environment
** Execute db:migrate
rake aborted!
uninitialized constant MysqlCompat::MysqlRes
/usr/local/lib/ruby/gems/1.9.1/gems/activesupport-2.3.3/lib/active_support/dependencies.rb:440:in
`rescue in load_missing_constant'
/usr/local/lib/ruby/gems/1.9.1/gems/activesupport-2.3.3/lib/active_support/dependencies.rb:436:in
`load_missing_constant'
/usr/local/lib/ruby/gems/1.9.1/gems/activesupport-2.3.3/lib/active_support/dependencies.rb:80:in
`const_missing_with_dependencies'
/usr/local/lib/ruby/gems/1.9.1/gems/activerecord-2.3.3/lib/active_record/connection_adapters/mysql_adapter.rb:9:in
`define_all_hashes_method!'
/usr/local/lib/ruby/gems/1.9.1/gems/activerecord-2.3.3/lib/active_record/connection_adapters/mysql_adapter.rb:71:in
`mysql_connection'
/usr/local/lib/ruby/gems/1.9.1/gems/activerecord-2.3.3/lib/active_record/connection_adapters/abstract/connection_pool.rb:223:in
`new_connection'
/usr/local/lib/ruby/gems/1.9.1/gems/activerecord-2.3.3/lib/active_record/connection_adapters/abstract/connection_pool.rb:245:in
`checkout_new_connection'
/usr/local/lib/ruby/gems/1.9.1/gems/activerecord-2.3.3/lib/active_record/connection_adapters/abstract/connection_pool.rb:188:in
`block (2 levels) in checkout'
/usr/local/lib/ruby/gems/1.9.1/gems/activerecord-2.3.3/lib/active_record/connection_adapters/abstract/connection_pool.rb:184:in
`loop'
/usr/local/lib/ruby/gems/1.9.1/gems/activerecord-2.3.3/lib/active_record/connection_adapters/abstract/connection_pool.rb:184:in
`block in checkout'
/usr/local/lib/ruby/1.9.1/monitor.rb:190:in `mon_synchronize'
/usr/local/lib/ruby/gems/1.9.1/gems/activerecord-2.3.3/lib/active_record/connection_adapters/abstract/connection_pool.rb:183:in
`checkout'
/usr/local/lib/ruby/gems/1.9.1/gems/activerecord-2.3.3/lib/active_record/connection_adapters/abstract/connection_pool.rb:98:in
`connection'
/usr/local/lib/ruby/gems/1.9.1/gems/activerecord-2.3.3/lib/active_record/connection_adapters/abstract/connection_pool.rb:326:in
`retrieve_connection'
/usr/local/lib/ruby/gems/1.9.1/gems/activerecord-2.3.3/lib/active_record/connection_adapters/abstract/connection_specification.rb:123:in
`retrieve_connection'
/usr/local/lib/ruby/gems/1.9.1/gems/activerecord-2.3.3/lib/active_record/connection_adapters/abstract/connection_specification.rb:115:in
`connection'
/usr/local/lib/ruby/gems/1.9.1/gems/activerecord-2.3.3/lib/active_record/migration.rb:435:in
`initialize'
/usr/local/lib/ruby/gems/1.9.1/gems/activerecord-2.3.3/lib/active_record/migration.rb:400:in
`new'
/usr/local/lib/ruby/gems/1.9.1/gems/activerecord-2.3.3/lib/active_record/migration.rb:400:in
`up'
/usr/local/lib/ruby/gems/1.9.1/gems/activerecord-2.3.3/lib/active_record/migration.rb:383:in
`migrate'
/usr/local/lib/ruby/gems/1.9.1/gems/rails-2.3.3/lib/tasks/databases.rake:116:in
`block (2 levels) in <top (required)>'
/usr/local/lib/ruby/gems/1.9.1/gems/rake-0.8.7/lib/rake.rb:636:in `call'
/usr/local/lib/ruby/gems/1.9.1/gems/rake-0.8.7/lib/rake.rb:636:in `block
in execute'
/usr/local/lib/ruby/gems/1.9.1/gems/rake-0.8.7/lib/rake.rb:631:in `each'
/usr/local/lib/ruby/gems/1.9.1/gems/rake-0.8.7/lib/rake.rb:631:in
`execute'
/usr/local/lib/ruby/gems/1.9.1/gems/rake-0.8.7/lib/rake.rb:597:in `block
in invoke_with_call_chain'
/usr/local/lib/ruby/1.9.1/monitor.rb:190:in `mon_synchronize'
/usr/local/lib/ruby/gems/1.9.1/gems/rake-0.8.7/lib/rake.rb:590:in
`invoke_with_call_chain'
/usr/local/lib/ruby/gems/1.9.1/gems/rake-0.8.7/lib/rake.rb:583:in
`invoke'
/usr/local/lib/ruby/gems/1.9.1/gems/rake-0.8.7/lib/rake.rb:2051:in
`invoke_task'
/usr/local/lib/ruby/gems/1.9.1/gems/rake-0.8.7/lib/rake.rb:2029:in
`block (2 levels) in top_level'
/usr/local/lib/ruby/gems/1.9.1/gems/rake-0.8.7/lib/rake.rb:2029:in
`each'
/usr/local/lib/ruby/gems/1.9.1/gems/rake-0.8.7/lib/rake.rb:2029:in
`block in top_level'
/usr/local/lib/ruby/gems/1.9.1/gems/rake-0.8.7/lib/rake.rb:2068:in
`standard_exception_handling'
/usr/local/lib/ruby/gems/1.9.1/gems/rake-0.8.7/lib/rake.rb:2023:in
`top_level'
/usr/local/lib/ruby/gems/1.9.1/gems/rake-0.8.7/lib/rake.rb:2001:in
`block in run'
/usr/local/lib/ruby/gems/1.9.1/gems/rake-0.8.7/lib/rake.rb:2068:in
`standard_exception_handling'
/usr/local/lib/ruby/gems/1.9.1/gems/rake-0.8.7/lib/rake.rb:1998:in `run'
/usr/local/bin/rake:31:in `<main>'
918721e6f3f3d0b01a82fcf8a935cee8?d=identicon&s=25 fernanda.aispuro (Guest)
on 2009-08-25 00:10
(Received via mailing list)
Hi there,

I just started using aptana and am working on my HelloWorld, but I'm
gettin the same error "uninitialized constant MysqlCompat::MysqlRes".
Did you ever figure out what is it about?

Thanks!

On Jul 31, 12:00 pm, "Martin J." <rails-mailing-l...@andreas-s.net>
7ef12e118e5180cb3dabca363631a432?d=identicon&s=25 Caleb Cullen (pandemic)
on 2009-08-27 20:07
Martin J. wrote:
> Hi,
> I installed the "kwatch-mysql-ruby" gem on my Debian server but when I
> try to run the "db:migrate" task I get the following error:
>
> ** Invoke db:migrate (first_time)
> ** Invoke environment (first_time)
> ** Execute environment
> ** Execute db:migrate
> rake aborted!
> uninitialized constant MysqlCompat::MysqlRes

I saw this, having freshly installed Rails 2.3.3, and then being told to
run 'gem install mysql' because the MySQL client is no longer bundled
with Rails, as of 2.2

Okay, I did that.  Then I got the error message you showed in your post
-- about MysqlCompat::MysqlRes not being defined.

Turns out there is no such thing; this error is caused by a malfunction
of the mysql-2.8.1 gem.

If you install the gem by hand, chances are when you run the test you'll
find that the gem's bundle doesn't actually manage to load the
mysqlclient library.  (On my MacOS X 10.5.8 system, it's a .dylib; under
Linux it may be a .so)

The error message I saw during the test phase looked like this:

./mysql.bundle: dlopen(./mysql.bundle, 9): Library not loaded:
/usr/local/mysql/lib/mysql/libmysqlclient.15.dylib (LoadError)
  Referenced from:
/Users/ccullen/Projects/npapp-v2/mysql-ruby-2.8.1/mysql.bundle
  Reason: image not found - ./mysql.bundle
  from test.rb:5

From that message you can see it's looking for the mysqlclient library
in a directory one level too deep, vis-a-vis the location my libraries
occupy:
/usr/local/mysql/lib is right; /usr/local/mysql/lib/mysql is not.

It is however pretty simple to create a 'mysql' symlink inside
/usr/local/mysql/lib and point it at '.', allowing the broken
mysql.bundle to locate its libraries.

This is definitely a hack.  I just wanted to help, since I haven't seen
any answers posted, and certainly nothing to explain why this error is
occurring.

Best of luck!
8ee8797254d515adcf0b4e3aba71ae7f?d=identicon&s=25 Kyle Fox (Guest)
on 2009-08-29 00:56
(Received via mailing list)
To fix this, specify ARCHFLAGS when you install the 'mysql' gem:

sudo env ARCHFLAGS="-arch x86_64" gem install mysql -- --with-mysql-
config=/usr/local/mysql/bin/mysql_config

On Aug 27, 12:07 pm, Caleb Cullen <rails-mailing-l...@andreas-s.net>
9d8098d533e63071f1594407a1df9e73?d=identicon&s=25 Evan Green (lostcoder)
on 2009-09-19 23:15
This didn't seem to fix the error for me.  I still get 'uninitialized
constant MysqlCompat::MysqlRes'


Kyle Fox wrote:
> To fix this, specify ARCHFLAGS when you install the 'mysql' gem:
>
> sudo env ARCHFLAGS="-arch x86_64" gem install mysql -- --with-mysql-
> config=/usr/local/mysql/bin/mysql_config
>
> On Aug 27, 12:07�pm, Caleb Cullen <rails-mailing-l...@andreas-s.net>


cheers,
Ef8ef6c9c8d2c6448d4260e34303a050?d=identicon&s=25 Glenn (Guest)
on 2009-09-29 15:59
(Received via mailing list)
I also built the gem with the archflags, but am still getting this
error.  Did anyone find a different reason that might be causing this?

On Sep 19, 11:15 pm, Evan Green <rails-mailing-l...@andreas-s.net>
9efd9c049d1e0970f95ceca9a2b5d1a6?d=identicon&s=25 Pishty Ags (pishty)
on 2009-09-29 21:42
Evan Green wrote:
> This didn't seem to fix the error for me.  I still get 'uninitialized
> constant MysqlCompat::MysqlRes'
>
>
> Kyle Fox wrote:
>> To fix this, specify ARCHFLAGS when you install the 'mysql' gem:
>>
>> sudo env ARCHFLAGS="-arch x86_64" gem install mysql -- --with-mysql-
>> config=/usr/local/mysql/bin/mysql_config
>>
>> On Aug 27, 12:07�pm, Caleb Cullen <rails-mailing-l...@andreas-s.net>
>
>
> cheers,

on my Centos Machine, i had to install mysql-devel.x86_64 first, then i
ran the command:

env ARCHFLAGS="-arch x86_64" gem install mysql --
--with-mysql-config=/usr/lib64/mysql/mysql_config

which did the trick.

thanks  Kyle
E6672076651167f091edda8e3eb5aaeb?d=identicon&s=25 Jean Bombeur (jeanbombeur)
on 2009-09-30 06:36
Anybody still has the issue?

I have been using jruby for a while but today I was trying to setup
using the last version of ruby 1.9 and rails 2.3.4 and I got hit with
that.

Also running centos and tried the ARCHFLAGS trick with no success.


Pishty Ags wrote:
> Evan Green wrote:
>> This didn't seem to fix the error for me.  I still get 'uninitialized
>> constant MysqlCompat::MysqlRes'
>>
>>
>> Kyle Fox wrote:
>>> To fix this, specify ARCHFLAGS when you install the 'mysql' gem:
>>>
>>> sudo env ARCHFLAGS="-arch x86_64" gem install mysql -- --with-mysql-
>>> config=/usr/local/mysql/bin/mysql_config
>>>
>>> On Aug 27, 12:07�pm, Caleb Cullen <rails-mailing-l...@andreas-s.net>
>>
>>
>> cheers,
>
> on my Centos Machine, i had to install mysql-devel.x86_64 first, then i
> ran the command:
>
> env ARCHFLAGS="-arch x86_64" gem install mysql --
> --with-mysql-config=/usr/lib64/mysql/mysql_config
>
> which did the trick.
>
> thanks  Kyle
E6672076651167f091edda8e3eb5aaeb?d=identicon&s=25 Jean Bombeur (jeanbombeur)
on 2009-09-30 06:46
Actually, doing more research and an strace on the process I found the
problem.

Looking in the wrong place for the location of the library, I added my
mysql lib directory to ld.so.conf/mysql.conf config file and it fixed
it.


Jean Bombeur wrote:
> Anybody still has the issue?
>
> I have been using jruby for a while but today I was trying to setup
> using the last version of ruby 1.9 and rails 2.3.4 and I got hit with
> that.
>
> Also running centos and tried the ARCHFLAGS trick with no success.
>
>
> Pishty Ags wrote:
>> Evan Green wrote:
>>> This didn't seem to fix the error for me.  I still get 'uninitialized
>>> constant MysqlCompat::MysqlRes'
>>>
>>>
>>> Kyle Fox wrote:
>>>> To fix this, specify ARCHFLAGS when you install the 'mysql' gem:
>>>>
>>>> sudo env ARCHFLAGS="-arch x86_64" gem install mysql -- --with-mysql-
>>>> config=/usr/local/mysql/bin/mysql_config
>>>>
>>>> On Aug 27, 12:07�pm, Caleb Cullen <rails-mailing-l...@andreas-s.net>
>>>
>>>
>>> cheers,
>>
>> on my Centos Machine, i had to install mysql-devel.x86_64 first, then i
>> ran the command:
>>
>> env ARCHFLAGS="-arch x86_64" gem install mysql --
>> --with-mysql-config=/usr/lib64/mysql/mysql_config
>>
>> which did the trick.
>>
>> thanks  Kyle
639723b7d46900d739ca9bf7b2be542d?d=identicon&s=25 Aarthi Ruby (learn_ruby)
on 2009-10-13 02:17
Hi

 ************* URGENT PLEASEEEEEEEEEEEEEEEEEEEEEEEEEE ***********
I still see the problem after following the above steps.
Please please help me.

~Sam.

==============================================================================
ruby script/server
=> Booting Mongrel
=> Rails 2.3.4 application starting on http://0.0.0.0:3000
=> Call with -d to detach
=> Ctrl-C to shutdown server
/!\ FAILSAFE /!\  Mon Oct 12 17:15:15 -0700 2009
  Status: 500 Internal Server Error
  uninitialized constant MysqlCompat::MysqlRes
    /usr/local/lib/ruby/gems/1.8/gems/activesupport-2.3.4/lib/active_support/dep
endencies.rb:440:in `load_missing_constant'
    /usr/local/lib/ruby/gems/1.8/gems/activesupport-2.3.4/lib/active_support/dep
endencies.rb:80:in `const_missing'
    /usr/local/lib/ruby/gems/1.8/gems/activerecord-2.3.4/lib/active_record/conne
ction_adapters/mysql_adapter.rb:9:in `define_all_hashes_method!'
    /usr/local/lib/ruby/gems/1.8/gems/activerecord-2.3.4/lib/active_record/conne
ction_adapters/mysql_adapter.rb:66:in `mysql_connection'
    /usr/local/lib/ruby/gems/1.8/gems/activerecord-2.3.4/lib/active_record/conne
ction_adapters/abstract/connection_pool.rb:223:in `send'
    /usr/local/lib/ruby/gems/1.8/gems/activerecord-2.3.4/lib/active_record/conne
ction_adapters/abstract/connection_pool.rb:223:in `new_connection'
    /usr/local/lib/ruby/gems/1.8/gems/activerecord-2.3.4/lib/active_record/conne
ction_adapters/abstract/connection_pool.rb:245:in
`checkout_new_connection'
    /usr/local/lib/ruby/gems/1.8/gems/activerecord-2.3.4/lib/active_record/conne
ction_adapters/abstract/connection_pool.rb:188:in `checkout'
    /usr/local/lib/ruby/gems/1.8/gems/activerecord-2.3.4/lib/active_record/conne
ction_adapters/abstract/connection_pool.rb:184:in `loop'
    /usr/local/lib/ruby/gems/1.8/gems/activerecord-2.3.4/lib/active_record/conne
ction_adapters/abstract/connection_pool.rb:184:in `checkout'
    /usr/local/lib/ruby/1.8/monitor.rb:242:in `synchronize'
    /usr/local/lib/ruby/gems/1.8/gems/activerecord-2.3.4/lib/active_record/conne
ction_adapters/abstract/connection_pool.rb:183:in `checkout'
    /usr/local/lib/ruby/gems/1.8/gems/activerecord-2.3.4/lib/active_record/conne
ction_adapters/abstract/connection_pool.rb:98:in `connection'
    /usr/local/lib/ruby/gems/1.8/gems/activerecord-2.3.4/lib/active_record/conne
ction_adapters/abstract/connection_pool.rb:326:in `retrieve_connection'
    /usr/local/lib/ruby/gems/1.8/gems/activerecord-2.3.4/lib/active_record/conne
ction_adapters/abstract/connection_specification.rb:123:in
`retrieve_connection'
    /usr/local/lib/ruby/gems/1.8/gems/activerecord-2.3.4/lib/active_record/conne
ction_adapters/abstract/connection_specification.rb:115:in `connection'
    /usr/local/lib/ruby/gems/1.8/gems/activerecord-2.3.4/lib/active_record/query
_cache.rb:9:in `cache'
    /usr/local/lib/ruby/gems/1.8/gems/activerecord-2.3.4/lib/active_record/query
_cache.rb:28:in `call'
    /usr/local/lib/ruby/gems/1.8/gems/activerecord-2.3.4/lib/active_record/conne
ction_adapters/abstract/connection_pool.rb:361:in `call'
    /usr/local/lib/ruby/gems/1.8/gems/actionpack-2.3.4/lib/action_controller/fai
lsafe.rb:26:in `call'
    /usr/local/lib/ruby/gems/1.8/gems/rack-1.0.0/lib/rack/lock.rb:11:in
`call'
    /usr/local/lib/ruby/gems/1.8/gems/rack-1.0.0/lib/rack/lock.rb:11:in
`synchro                     nize'
    /usr/local/lib/ruby/gems/1.8/gems/rack-1.0.0/lib/rack/lock.rb:11:in
`call'
    /usr/local/lib/ruby/gems/1.8/gems/actionpack-2.3.4/lib/action_controller/dis
patcher.rb:114:in `call'
    /usr/local/lib/ruby/gems/1.8/gems/actionpack-2.3.4/lib/action_controller/rel
oader.rb:34:in `run'
    /usr/local/lib/ruby/gems/1.8/gems/actionpack-2.3.4/lib/action_controller/dis
patcher.rb:108:in `call'
    /usr/local/lib/ruby/gems/1.8/gems/rails-2.3.4/lib/rails/rack/static.rb:31:in
`call'
    /usr/local/lib/ruby/gems/1.8/gems/rack-1.0.0/lib/rack/urlmap.rb:46:in
`call'
    /usr/local/lib/ruby/gems/1.8/gems/rack-1.0.0/lib/rack/urlmap.rb:40:in
`each'
    /usr/local/lib/ruby/gems/1.8/gems/rack-1.0.0/lib/rack/urlmap.rb:40:in
`call'
    /usr/local/lib/ruby/gems/1.8/gems/rails-2.3.4/lib/rails/rack/log_tailer.rb:1
7:in `call'
    /usr/local/lib/ruby/gems/1.8/gems/rack-1.0.0/lib/rack/content_length.rb:13:i
n `call'
    /usr/local/lib/ruby/gems/1.8/gems/rack-1.0.0/lib/rack/chunked.rb:15:in
`call                     '
    /usr/local/lib/ruby/gems/1.8/gems/rack-1.0.0/lib/rack/handler/mongrel.rb:61:
in `process'
    /usr/local/lib/ruby/gems/1.8/gems/mongrel-1.1.5/lib/mongrel.rb:159:in
`proce                     ss_client'
    /usr/local/lib/ruby/gems/1.8/gems/mongrel-1.1.5/lib/mongrel.rb:158:in
`each'
    /usr/local/lib/ruby/gems/1.8/gems/mongrel-1.1.5/lib/mongrel.rb:158:in
`proce                     ss_client'
    /usr/local/lib/ruby/gems/1.8/gems/mongrel-1.1.5/lib/mongrel.rb:285:in
`run'
    /usr/local/lib/ruby/gems/1.8/gems/mongrel-1.1.5/lib/mongrel.rb:285
==============================================================================

Jean Bombeur wrote:
> Actually, doing more research and an strace on the process I found the
> problem.
>
> Looking in the wrong place for the location of the library, I added my
> mysql lib directory to ld.so.conf/mysql.conf config file and it fixed
> it.
>
>
> Jean Bombeur wrote:
>> Anybody still has the issue?
>>
>> I have been using jruby for a while but today I was trying to setup
>> using the last version of ruby 1.9 and rails 2.3.4 and I got hit with
>> that.
>>
>> Also running centos and tried the ARCHFLAGS trick with no success.
>>
>>
>> Pishty Ags wrote:
>>> Evan Green wrote:
>>>> This didn't seem to fix the error for me.  I still get 'uninitialized
>>>> constant MysqlCompat::MysqlRes'
>>>>
>>>>
>>>> Kyle Fox wrote:
>>>>> To fix this, specify ARCHFLAGS when you install the 'mysql' gem:
>>>>>
>>>>> sudo env ARCHFLAGS="-arch x86_64" gem install mysql -- --with-mysql-
>>>>> config=/usr/local/mysql/bin/mysql_config
>>>>>
>>>>> On Aug 27, 12:07�pm, Caleb Cullen <rails-mailing-l...@andreas-s.net>
>>>>
>>>>
>>>> cheers,
>>>
>>> on my Centos Machine, i had to install mysql-devel.x86_64 first, then i
>>> ran the command:
>>>
>>> env ARCHFLAGS="-arch x86_64" gem install mysql --
>>> --with-mysql-config=/usr/lib64/mysql/mysql_config
>>>
>>> which did the trick.
>>>
>>> thanks  Kyle
B2d4edc0b08f9fbba094ab7e4e744168?d=identicon&s=25 Raphael Petegrosso (Guest)
on 2009-10-16 01:54
(Received via mailing list)
I was having the same problem on Snow Leopard and, after some time I
did the following:

Removed all mysql gems I had:

gem uninstall mysql

In my case I had to specify both mysql-dir and mysql-config (and -arch
x86_64 to 64 bits)

export ARCHFLAGS="-arch i386 -arch x86_64" ; gem install --no-rdoc --
no-ri mysql -- --with-mysql-dir=/usr/local --with-mysql-config=/usr/
local/mysql/bin/mysql_config

Hope it works
639723b7d46900d739ca9bf7b2be542d?d=identicon&s=25 Aarthi Ruby (learn_ruby)
on 2009-10-16 08:43
Raphael Petegrosso wrote:
> I was having the same problem on Snow Leopard and, after some time I
> did the following:
>
> Removed all mysql gems I had:
>
> gem uninstall mysql
>
> In my case I had to specify both mysql-dir and mysql-config (and -arch
> x86_64 to 64 bits)
>
> export ARCHFLAGS="-arch i386 -arch x86_64" ; gem install --no-rdoc --
> no-ri mysql -- --with-mysql-dir=/usr/local --with-mysql-config=/usr/
> local/mysql/bin/mysql_config
>
> Hope it works

I was able to resolve this issue. Thanks for your valuable suggestions.
Along with the above steps, I had to configure the LD_LIBRARY_PATH.
E1dcd5805b03dc5fa14ad5a5da928718?d=identicon&s=25 Andrew McDonough (andrewmcdonough)
on 2009-10-22 16:26
These instructions also worked for me after upgrading to Snow Leopard.
In my case mysql was in /opt/local/lib/mysql5, so the following fixed it
for me:

sudo gem uninstall mysql

export ARCHFLAGS="-arch i386 -arch x86_64" ; gem install --no-rdoc
--no-ri mysql -- --with-mysql-dir=/opt/local/lib/mysql5
--with-mysql-config=/opt/local/lib/mysql5/bin/mysql_config


> I was having the same problem on Snow Leopard and, after some time I
> did the following:
>
> Removed all mysql gems I had:
>
> gem uninstall mysql
>
> In my case I had to specify both mysql-dir and mysql-config (and -arch
> x86_64 to 64 bits)
>
> export ARCHFLAGS="-arch i386 -arch x86_64" ; gem install --no-rdoc --
> no-ri mysql -- --with-mysql-dir=/usr/local --with-mysql-config=/usr/
> local/mysql/bin/mysql_config
>
> Hope it works
7ef12e118e5180cb3dabca363631a432?d=identicon&s=25 Caleb Cullen (pandemic)
on 2009-10-22 17:33
Andrew McDonough wrote:
> These instructions also worked for me after upgrading to Snow Leopard.
> In my case mysql was in /opt/local/lib/mysql5, so the following fixed it
> for me:
>
> sudo gem uninstall mysql
>
> export ARCHFLAGS="-arch i386 -arch x86_64" ; gem install --no-rdoc
> --no-ri mysql -- --with-mysql-dir=/opt/local/lib/mysql5
> --with-mysql-config=/opt/local/lib/mysql5/bin/mysql_config

I was able to get the mysql gem to compile by doing something like that;
but then I found that, for whatever reason, /tmp/mysql.sock did not
exist (and so my rake tasks failed, etc).  I followed instructions on
the Rails blog to install MySQL from a DMG, and then /tmp/mysql.sock
existed as expected.

HTH.
Ea7a786fc3bfe7a77e6fe9130ad59ba5?d=identicon&s=25 grosser.michael (Guest)
on 2009-10-24 15:03
(Received via mailing list)
had the same, switching to 2.7 helps
sudo gem install mysql -v 2.7

On 22 Okt., 17:33, Caleb Cullen <rails-mailing-l...@andreas-s.net>
70da155119b89a4fe0161d1c276dc4a4?d=identicon&s=25 Guglielmo Celata (guglielmo)
on 2009-11-11 20:12
grosser.michael wrote:
> had the same, switching to 2.7 helps
> sudo gem install mysql -v 2.7
>
> On 22 Okt., 17:33, Caleb Cullen <rails-mailing-l...@andreas-s.net>
I was able to install the mysql v. 2.7 gem on a macport mysql version
with:

sudo gem install -v 2.7 --no-rdoc --no-ri mysql --
--with-mysql-dir=/opt/local/lib/mysql5
--with-mysql-config=/opt/local/lib/mysql5/bin/mysql_config;
Fba3c228ec2fbff05546efc94ca8131a?d=identicon&s=25 Steven Hampton (wolfravenous)
on 2009-12-16 19:49
If you are still getting this issue, I have posted an EXPLANATION as
well as how to derive the correct solution for your system here
http://techliberty.blogspot.com/ the EXPLANATION was to long for a forum
post :)
639723b7d46900d739ca9bf7b2be542d?d=identicon&s=25 Aarthi Ruby (learn_ruby)
on 2009-12-16 23:26
Steven Hampton wrote:
> If you are still getting this issue, I have posted an EXPLANATION as
> well as how to derive the correct solution for your system here
> http://techliberty.blogspot.com/ the EXPLANATION was to long for a forum
> post :)

Thanks a lot Steven. I am not seeing this issue now, but will definitely
go through your explanation..!!!
941ebeadf2b6d6a2fbc485b5a46b9228?d=identicon&s=25 Roger Collins (rogercollins)
on 2009-12-26 16:11
F00907dc1fbdba7102c541aab48648c2?d=identicon&s=25 Rick Casey (rixter)
on 2010-01-22 06:35
Caleb

Could I ask what test you were running during the "test phase" you
mention below?

I'm really stumped by my problems with this bug, and am trying to
determine if my error has the same cause.

thanks,
Rick

Caleb Cullen wrote:
> Martin J. wrote:
>> Hi,
>> I installed the "kwatch-mysql-ruby" gem on my Debian server but when I
>> try to run the "db:migrate" task I get the following error:
>>
>> ** Invoke db:migrate (first_time)
>> ** Invoke environment (first_time)
>> ** Execute environment
>> ** Execute db:migrate
>> rake aborted!
>> uninitialized constant MysqlCompat::MysqlRes
>
> I saw this, having freshly installed Rails 2.3.3, and then being told to
> run 'gem install mysql' because the MySQL client is no longer bundled
> with Rails, as of 2.2
>
> Okay, I did that.  Then I got the error message you showed in your post
> -- about MysqlCompat::MysqlRes not being defined.
>
> Turns out there is no such thing; this error is caused by a malfunction
> of the mysql-2.8.1 gem.
>
> If you install the gem by hand, chances are when you run the test you'll
> find that the gem's bundle doesn't actually manage to load the
> mysqlclient library.  (On my MacOS X 10.5.8 system, it's a .dylib; under
> Linux it may be a .so)
>
> The error message I saw during the test phase looked like this:
>
> ./mysql.bundle: dlopen(./mysql.bundle, 9): Library not loaded:
> /usr/local/mysql/lib/mysql/libmysqlclient.15.dylib (LoadError)
>   Referenced from:
> /Users/ccullen/Projects/npapp-v2/mysql-ruby-2.8.1/mysql.bundle
>   Reason: image not found - ./mysql.bundle
>   from test.rb:5
>
> From that message you can see it's looking for the mysqlclient library
> in a directory one level too deep, vis-a-vis the location my libraries
> occupy:
> /usr/local/mysql/lib is right; /usr/local/mysql/lib/mysql is not.
>
> It is however pretty simple to create a 'mysql' symlink inside
> /usr/local/mysql/lib and point it at '.', allowing the broken
> mysql.bundle to locate its libraries.
>
> This is definitely a hack.  I just wanted to help, since I haven't seen
> any answers posted, and certainly nothing to explain why this error is
> occurring.
>
> Best of luck!
D42a6517c5e7c7b1055b9cb20b67cb31?d=identicon&s=25 Wang Timor (timor)
on 2010-01-27 04:07
>> Pishty Ags wrote:
>>> Evan Green wrote:
>>>> This didn't seem to fix the error for me.  I still get 'uninitialized
>>>> constant MysqlCompat::MysqlRes'
>>>>
>>>>
>>>> Kyle Fox wrote:
>>>>> To fix this, specify ARCHFLAGS when you install the 'mysql' gem:
>>>>>
>>>>> sudo env ARCHFLAGS="-arch x86_64" gem install mysql -- --with-mysql-
>>>>> config=/usr/local/mysql/bin/mysql_config
>>>>>
>>>>> On Aug 27, 12:07�pm, Caleb Cullen <rails-mailing-l...@andreas-s.net>
>>>>
>>>>
>>>> cheers,
>>>
>>> on my Centos Machine, i had to install mysql-devel.x86_64 first, then i
>>> ran the command:
>>>
>>> env ARCHFLAGS="-arch x86_64" gem install mysql --
>>> --with-mysql-config=/usr/lib64/mysql/mysql_config
>>>
>>> which did the trick.
>>>
>>> thanks  Kyle

I use Centos , but it's i386 . So I installd mysql-devel,and use the
command:
env ARCHFLAGS="-arch i386" gem install mysql --
--with-mysql-config=/usr/lib/msyql/mysql_config",
and it did the work , Aha!
B914f81b692257d5246f687aff3f8840?d=identicon&s=25 Nikhil Gupte (nikhilgupte)
on 2010-01-28 17:15
For all you folks who couldn't get this to work on Snow Leopard inspite
of trying the ridiculously simple solution(s) mentioned above,

Try this:
Re compile ruby. Then do

sudo env ARCHFLAGS="-arch x86_64" gem install mysql --
--with-mysql-config=/usr/local/mysql/bin/mysql_config

This will ensure that the *right* arch of ruby is used to compile the
native extensions.
9f4e11fd04ca1e5a56d00ff3531104ed?d=identicon&s=25 Jean Nibee (jeannibee)
on 2010-02-25 04:07
Nikhil Gupte wrote:
> For all you folks who couldn't get this to work on Snow Leopard inspite
> of trying the ridiculously simple solution(s) mentioned above,
>
> Try this:
> Re compile ruby. Then do
>
> sudo env ARCHFLAGS="-arch x86_64" gem install mysql --
> --with-mysql-config=/usr/local/mysql/bin/mysql_config
>
> This will ensure that the *right* arch of ruby is used to compile the
> native extensions.

and how do you recompile Ruby...

New to the OSX platform...

Thanks.
373cedf8b07bbc701ba5f5f8fcae6dfa?d=identicon&s=25 Andrew C. (Guest)
on 2010-02-25 07:27
(Received via mailing list)
http://hivelogic.com/articles/compiling-ruby-rubyg...

I went through this within the last two days.  Might be useful to see
my write up here, too:

http://groups.google.com/group/rubyonrails-talk/br...
B914f81b692257d5246f687aff3f8840?d=identicon&s=25 Nikhil Gupte (nikhilgupte)
on 2010-02-25 07:36
Jean,

Best is to install macports, if you aren't already using it.

To re-compile ruby, run:

sudo port install ruby
75abdd91b53785b66bed9f48f305dced?d=identicon&s=25 Mike Montagne (mikemontagne)
on 2010-03-22 01:45
Nikhil Gupte wrote:
> Jean,
>
> Best is to install macports, if you aren't already using it.
>
> To re-compile ruby, run:
>
> sudo port install ruby

I was able to get mysql gem to install on OSX Leopard without warnings
with the --no-rdoc and --no-ri switches; archflags likewise eliminated
the uninitialized constant error:

sudo gem install mysql --no-rdoc --no-ri --
--with-mysql-config=/usr/local/mysql/bin/mysql_config

That hasn't made my installation functional however. I just rebuilt my
entire project with rails myApp -d mysql; I then scaffolded 5 sets of
tables (i.e. script/generate scaffold tablename c_code:string
c_name:string tran_id:integer priority:integer); I next drag the project
directory onto XCode Organizer; create the start server script
(script/server); and start the gem server in terminal: gem server.

Fine and dandy so far (seemingly). Then I run rake db:migrate to
engender the following error:

iMacMike:pfmpe mikemontagne$ rake db:migrate --trace
(in /Users/mikemontagne/rproj/pfmpe)
** Invoke db:migrate (first_time)
** Invoke environment (first_time)
** Execute environment
** Execute db:migrate
rake aborted!
Unknown database 'pfmpe_development'

----------

database.yml indicates that this is supposed to be the development
database. But no such file exists in my project directory.

Is this a MySQL server configuration issue? Does anybody understand why
this table is not being created?
Bee69cfed999cd13e3bff73d472a39ee?d=identicon&s=25 Hassan Schroeder (Guest)
on 2010-03-22 02:14
(Received via mailing list)
On Sun, Mar 21, 2010 at 5:45 PM, Mike Montagne <lists@ruby-forum.com>
wrote:

> iMacMike:pfmpe mikemontagne$ rake db:migrate --trace

> Unknown database 'pfmpe_development'

> database.yml indicates that this is supposed to be the development
> database. But no such file exists in my project directory.

What file would you expect? This refers to a database, physical
location dependent on your MySQL configuration.

> Is this a MySQL server configuration issue? Does anybody understand why
> this table is not being created?

Perhaps you left out the step where you create it? At least I didn't see
it in your post. You can create databases manually through the MySQL
CLI console or a number of other tools, or you can run the appropriate
rake task. `rake -T` will give you a list of the available tasks.

But you *do* have to create it before running your migrations :-)

HTH,
--
Hassan Schroeder ------------------------ hassan.schroeder@gmail.com
twitter: @hassan
Ea28a1533185f15e9364a8db6f9c0bae?d=identicon&s=25 Oren Golan (oreng)
on 2010-07-06 20:52
I had this issue after upgrading from ubuntu 9.10 (karmic) to 10.4
(lucid).
the solution was to libmysqlclient16-dev:

sudo aptitude install libmysqlclient16-dev
334ce47b13120799a35dd17914426323?d=identicon&s=25 Jatin kumar (Guest)
on 2010-07-06 21:16
(Received via mailing list)
I am not sure of why this error is coming, but just for a moment, try
rake
db:create before doing rake db:migrate.
It might solve your problem.
8f36c6e200e2c62dd039515bd2b1b047?d=identicon&s=25 Sandip Jassar (sandipjassar)
on 2010-07-10 22:54
Jatin kumar wrote:
> I am not sure of why this error is coming, but just for a moment, try
> rake
> db:create before doing rake db:migrate.
> It might solve your problem.

The Mysql::Result constant is defined in the mysql_api gem (.so shared
object) - this is located in
gems/1.9.1/gems/mysql-2.8.1/ext/mysql_api/mysql_api.so

To fix the error the cleanest way I could think of - I created a
symbolic link to this object in /usr/lib/ruby/1.9.1/ - which is in
Ruby's $LOAD_PATH variable - which you can see your own version via :
irb; puts "#{$LOAD_PATH}";

- None of the solutions people had posted on the web helped me - the
main ones I kept seeing were - reinstall the mysql gem with ARCH_FLAGS
set differently - and make a symbolic link mysql -> '.' because Ruby was
looking one directory too deep

I'm using Ubuntu Karamic Koala, Ruby 1.9.1, mysql-2.8.1, rails-2.3.5
Dc6569e85c0c721d5fe40a3feb00087b?d=identicon&s=25 Na Na (apolloe)
on 2010-07-17 08:26
Using Mac OS X 10.6.4, the solutions above didn't work for me.  I
removed the gem, then tried:
gem install ruby-mysql

instead of the various attempts to get "gem install mysql" to work.

At a glance, this appears to have worked, and my ruby on rails is able
to access database.
9fee948f931bfe7a0f91c11f15c9a0a8?d=identicon&s=25 Derek Lei (dlei)
on 2010-07-22 12:21
Thanks Na Na, I was able to fix the issue by uninstalling the mysql gem
and then installing ruby-mysql gem.

Na Na wrote:
> Using Mac OS X 10.6.4, the solutions above didn't work for me.  I
> removed the gem, then tried:
> gem install ruby-mysql
>
> instead of the various attempts to get "gem install mysql" to work.
>
> At a glance, this appears to have worked, and my ruby on rails is able
> to access database.
561a3a55352fe6a5343e541a6894b541?d=identicon&s=25 aa bb (bbnnt)
on 2010-08-20 11:38
Leopard 10.6.4.
Solved on my side by reinstalling mysql, using the 64bits version
instead of the mistakenly installed 32bits.  Obvious ?
153573b9010e611f9ef7561cad74febc?d=identicon&s=25 Ben Chatelain (phatblat)
on 2010-09-05 22:25
Kyle Fox wrote:
> To fix this, specify ARCHFLAGS when you install the 'mysql' gem:
>
> sudo env ARCHFLAGS="-arch x86_64" gem install mysql -- --with-mysql-
> config=/usr/local/mysql/bin/mysql_config
>
> On Aug 27, 12:07�pm, Caleb Cullen <rails-mailing-l...@andreas-s.net>

Exactly the answer I needed. Thanks!
19fe735490c8f7e08d5c2de7dc25c826?d=identicon&s=25 Jason Fr (jfrankov)
on 2010-10-07 21:04
Kyle Fox wrote:
> To fix this, specify ARCHFLAGS when you install the 'mysql' gem:
>
> sudo env ARCHFLAGS="-arch x86_64" gem install mysql -- --with-mysql-
> config=/usr/local/mysql/bin/mysql_config
>
> On Aug 27, 12:07�pm, Caleb Cullen <rails-mailing-l...@andreas-s.net>

This fixed the problem for me. thanks!

-Jason
7235e16595dfbee13825b4452ba1c03e?d=identicon&s=25 John H. (john_h)
on 2010-12-08 15:57
Thanks Kyle, worked awesomely on my macosx machine.

Kyle Fox wrote in post #846791:
> To fix this, specify ARCHFLAGS when you install the 'mysql' gem:
>
> sudo env ARCHFLAGS="-arch x86_64" gem install mysql -- --with-mysql-
> config=/usr/local/mysql/bin/mysql_config
>
> On Aug 27, 12:07 pm, Caleb Cullen <rails-mailing-l...@andreas-s.net>
Abb357cf69e4b0d1b8a9b1e2555c7ed2?d=identicon&s=25 Sebastian Bring (seabass)
on 2010-12-30 23:37
Oren Golan wrote in post #923611:
> I had this issue after upgrading from ubuntu 9.10 (karmic) to 10.4
> (lucid).
> the solution was to libmysqlclient16-dev:
>
> sudo aptitude install libmysqlclient16-dev

As a Ubuntu user that did the trick for me.
Thanks a lot, Oren! Your decision to post this probably saved hours of
work for me.
F5c7bc3748ec84018b16cfdc67ab1496?d=identicon&s=25 Michael S. (michael_s57)
on 2011-02-10 22:01
Raphael Petegrosso wrote in post #859937:
> I was having the same problem on Snow Leopard and, after some time I
> did the following:
>
> Removed all mysql gems I had:
>
> gem uninstall mysql
>
> In my case I had to specify both mysql-dir and mysql-config (and -arch
> x86_64 to 64 bits)
>
> export ARCHFLAGS="-arch i386 -arch x86_64" ; gem install --no-rdoc --
> no-ri mysql -- --with-mysql-dir=/usr/local --with-mysql-config=/usr/
> local/mysql/bin/mysql_config
>
> Hope it works

I tried this and got the following message (also using Snow Leopard)

ERROR:  While executing gem ... (Gem::CommandLineError)
    Please specify at least one gem name (e.g. gem build GEMNAME)
8058f89a04bbc5ca23580ddf6518e153?d=identicon&s=25 Stealth35 Stealth35 (stealth35)
on 2011-02-13 15:45
Michael S. wrote in post #980959:
> Raphael Petegrosso wrote in post #859937:
>
> I tried this and got the following message (also using Snow Leopard)
>
> ERROR:  While executing gem ... (Gem::CommandLineError)
>     Please specify at least one gem name (e.g. gem build GEMNAME)


do :

sudo install_name_tool -change libmysqlclient.16.dylib
/usr/local/mysql/lib/libmysqlclient.16.dylib
/Library/Ruby/Gems/1.8/gems/mysql-2.8.1/lib/mysql_api.bundle
Baf4184ea594b57be1e57a0b7a679c05?d=identicon&s=25 Matthew Werner (mttwrnr)
on 2011-02-17 01:00
Hi All,

This has been the most thorough discussion of the topic I've found. I've
spent far too much time trying to get this stupid gem to work. I'm going
to post the information i've got and I'm praying someone out there will
be able to help me.

> ruby -v
ruby 1.8.7 (2009-06-12 patchlevel 174) [universal-darwin10.0]
> mysql --version
mysql  Ver 14.14 Distrib 5.5.9, for osx10.6 (i386) using readline 5.1
> rails -v
Rails 2.3.5
> sudo gem uninstall mysql
Successfully uninstalled mysql-2.8.1

Here is where I've seen so so (SO) many different recommendations on
what to do. I've tried damn near everything, both sudo and not,
specifying my arch flags and not. I'll just go with the most thorough:

> export ARCHFLAGS="-arch i386" ; sudo gem install --no-rdoc --no-ri mysql --
--with-mysql-dir=/usr/local
--with-mysql-config=/usr/local/mysql/bin/mysql_config
Building native extensions.  This could take a while...
Successfully installed mysql-2.8.1
1 gem installed

> rake db:migrate --trace
** Invoke db:migrate (first_time)
** Invoke environment (first_time)
** Execute environment
=> Environment: Development
** Execute db:migrate
rake aborted!
uninitialized constant MysqlCompat::MysqlRes
/Library/Ruby/Gems/1.8/gems/activesupport-2.3.4/lib/active_support/dependencies.rb:440:in
`load_missing_constant'
/Library/Ruby/Gems/1.8/gems/activesupport-2.3.4/lib/active_support/dependencies.rb:80:in
`const_missing'
/Library/Ruby/Gems/1.8/gems/activerecord-2.3.4/lib/active_record/connection_adapters/mysql_adapter.rb:9:in
`define_all_hashes_method!'

I'm lost on what else it could be. I feel like I've tried every
combination. I've tried reinstalling ruby, 64bit of mysql, please help.
I'm out of ideas.
888bbcd521c15d51455907c000ff9bce?d=identicon&s=25 guilherme p. (guilherme_p)
on 2011-03-04 16:36
Hi,

After all attempts. I simply uninstall mysql 5.5.9 (64 bits) and all
mysql gems.

Then install Mysql 5.1.55 (64 bits) and

"sudo env ARCHFLAGS="-arch x86_64" gem install mysql -- --with-mysql-
config=/usr/local/mysql/bin/mysql_config"

and it works on MAC...

Hope it helps.


Matthew Werner wrote in post #982105:
> Hi All,
>
> This has been the most thorough discussion of the topic I've found. I've
> spent far too much time trying to get this stupid gem to work. I'm going
> to post the information i've got and I'm praying someone out there will
> be able to help me.
>
>> ruby -v
> ruby 1.8.7 (2009-06-12 patchlevel 174) [universal-darwin10.0]
>> mysql --version
> mysql  Ver 14.14 Distrib 5.5.9, for osx10.6 (i386) using readline 5.1
>> rails -v
> Rails 2.3.5
>> sudo gem uninstall mysql
> Successfully uninstalled mysql-2.8.1
>
> Here is where I've seen so so (SO) many different recommendations on
> what to do. I've tried damn near everything, both sudo and not,
> specifying my arch flags and not. I'll just go with the most thorough:
>
>> export ARCHFLAGS="-arch i386" ; sudo gem install --no-rdoc --no-ri mysql --
> --with-mysql-dir=/usr/local
> --with-mysql-config=/usr/local/mysql/bin/mysql_config
> Building native extensions.  This could take a while...
> Successfully installed mysql-2.8.1
> 1 gem installed
>
>> rake db:migrate --trace
> ** Invoke db:migrate (first_time)
> ** Invoke environment (first_time)
> ** Execute environment
> => Environment: Development
> ** Execute db:migrate
> rake aborted!
> uninitialized constant MysqlCompat::MysqlRes
>
/Library/Ruby/Gems/1.8/gems/activesupport-2.3.4/lib/active_support/dependencies.rb:440:in
> `load_missing_constant'
>
/Library/Ruby/Gems/1.8/gems/activesupport-2.3.4/lib/active_support/dependencies.rb:80:in
> `const_missing'
>
/Library/Ruby/Gems/1.8/gems/activerecord-2.3.4/lib/active_record/connection_adapters/mysql_adapter.rb:9:in
> `define_all_hashes_method!'
>
> I'm lost on what else it could be. I feel like I've tried every
> combination. I've tried reinstalling ruby, 64bit of mysql, please help.
> I'm out of ideas.
3f741ef95971a3b52aa0be69a793923e?d=identicon&s=25 Mariusz Nowak (medikoo)
on 2011-03-08 13:51
Hi,

I've found the way to install gem with mysql 5.5x on Snow Leopard.
Solution is described at:
http://lightyearsoftware.com/2011/02/mysql-5-5-on-mac-os-x/

So just modify DYLD_LIBRARY_PATH and it will work - at least it fixed
issue on my side

Hope that helps.

Mariusz Nowak

guilherme p. wrote in post #985453:
> Hi,
>
> After all attempts. I simply uninstall mysql 5.5.9 (64 bits) and all
> mysql gems.
>
> Then install Mysql 5.1.55 (64 bits) and
>
> "sudo env ARCHFLAGS="-arch x86_64" gem install mysql -- --with-mysql-
> config=/usr/local/mysql/bin/mysql_config"
>
> and it works on MAC...
>
> Hope it helps.
>
>
> Matthew Werner wrote in post #982105:
>> Hi All,
>>
>> This has been the most thorough discussion of the topic I've found. I've
>> spent far too much time trying to get this stupid gem to work. I'm going
>> to post the information i've got and I'm praying someone out there will
>> be able to help me.
>>
>>> ruby -v
>> ruby 1.8.7 (2009-06-12 patchlevel 174) [universal-darwin10.0]
>>> mysql --version
>> mysql  Ver 14.14 Distrib 5.5.9, for osx10.6 (i386) using readline 5.1
>>> rails -v
>> Rails 2.3.5
>>> sudo gem uninstall mysql
>> Successfully uninstalled mysql-2.8.1
>>
>> Here is where I've seen so so (SO) many different recommendations on
>> what to do. I've tried damn near everything, both sudo and not,
>> specifying my arch flags and not. I'll just go with the most thorough:
>>
>>> export ARCHFLAGS="-arch i386" ; sudo gem install --no-rdoc --no-ri mysql --
>> --with-mysql-dir=/usr/local
>> --with-mysql-config=/usr/local/mysql/bin/mysql_config
>> Building native extensions.  This could take a while...
>> Successfully installed mysql-2.8.1
>> 1 gem installed
>>
>>> rake db:migrate --trace
>> ** Invoke db:migrate (first_time)
>> ** Invoke environment (first_time)
>> ** Execute environment
>> => Environment: Development
>> ** Execute db:migrate
>> rake aborted!
>> uninitialized constant MysqlCompat::MysqlRes
>>
>
/Library/Ruby/Gems/1.8/gems/activesupport-2.3.4/lib/active_support/dependencies.rb:440:in
>> `load_missing_constant'
>>
>
/Library/Ruby/Gems/1.8/gems/activesupport-2.3.4/lib/active_support/dependencies.rb:80:in
>> `const_missing'
>>
>
/Library/Ruby/Gems/1.8/gems/activerecord-2.3.4/lib/active_record/connection_adapters/mysql_adapter.rb:9:in
>> `define_all_hashes_method!'
>>
>> I'm lost on what else it could be. I feel like I've tried every
>> combination. I've tried reinstalling ruby, 64bit of mysql, please help.
>> I'm out of ideas.
789c837d51bcaac2cd6dfda2e195f0b2?d=identicon&s=25 Tianchen J. (tianchen_j)
on 2011-04-17 16:54
After wrestling with this problem for several days I finally got it
nailed. 2 things that I have done that made it work:

   1. sudo env ARCHFLAGS="-arch x86_64" gem install --no-rdoc --no-ri
mysql -- --with-mysql-config=/usr/local/mysql/bin/mysql_config
   2. export DYLD_LIBRARY_PATH="/usr/local/mysql/lib:$DYLD_LIBRARY_PATH"


I'm on Snow Leopard, and have only 1 MySQL (x86_64) 5.5, and 1 ruby
(prepackaged with Snow Leopard) installed.
0271360793bb0af2b85b248d06ab0edf?d=identicon&s=25 Lonny E. (lonny_e)
on 2011-08-06 23:06
If you have tried all the above and it still didn't work, try the
instructions on THIS page:

http://lightyearsoftware.com/2011/02/mysql-5-5-on-...

It worked for me! (Don't forget to use the "source" command or restart
your terminal session after modifying your bash profile.)
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