Error: uninitialized constant MysqlCompat::MysqlRes

rubyonrails-talk
1

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.

2

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

3

Hi,

I've found the way to install gem with mysql 5.5x on Snow Leopard. Solution is described at:

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