I have working fine my installation of Ruby on Rails on my Snow Leopard. I've tried for several days install MySQL with Ruby on Rails, all I've got when I run:
rake db:create
is:
(in /Users/naikon/RoR/test2)
dyld: lazy symbol binding failed: Symbol not found: _mysql_init
Referenced from: /Library/Ruby/Gems/1.8/gems/mysql2-0.2.4/ext/mysql2/mysql2.bundle
Expected in: flat namespace
dyld: Symbol not found: _mysql_init
Referenced from: /Library/Ruby/Gems/1.8/gems/mysql2-0.2.4/ext/mysql2/mysql2.bundle
Expected in: flat namespace
Trace/BPT trap
I've tried with MySQL 32 and 64 bits (and deleting all several times), install mysql gem in all the ways I've found on the internet, including
sudo env ARCHFLAGS="-arch x86_64" gem install mysql -- --with-mysql-config=/usr/local/mysql/bin/mysql_config
I'm lost, frustrated and I really appreciate some help.
Thanks.
Well lets start off with the fact your building the incorrect gem.
From your error report it appears your using Rails 3, and this doesn't use the "mysql" gem at all. It uses the mysql2 gem which offers a number of performance features.
You can read more about the mysql2 gem at http://github.com/brianmario/mysql2
I think you will be fine once you install the correct gem. =)
Related
I am currently trying to install the mysql2 gem, under Ruby 1.8.7 and Mac 10.6.6 and mysql 64 bits, so I can use Rails 3 and mysql together.
When I do the command:
sudo gem install mysql2
I get:
Building native extensions. This could take a while...
Successfully installed mysql2-0.2.6
1 gem installed
Installing ri documentation for mysql2-0.2.6...
Enclosing class/module 'mMysql2' for class Client not known
Enclosing class/module 'mMysql2' for class Result not known
Installing RDoc documentation for mysql2-0.2.6...
Enclosing class/module 'mMysql2' for class Client not known
Enclosing class/module 'mMysql2' for class Result not known
I did a lot of things recommended for this problem here on SO, but nothing seemed to help.
Has anyone got a idea about what to do next?
Edit: When I try do to rake db:migrate, it says: http://pastebin.com/tuPwQmqL. I can't do rails server either.
Edit 2: Managed to do it, thanks!
This is just a warning that the documentation for a module is empty. It shouldn't cause any problems.
If you are able to your commands like "rake db:migrate" etc. Everything is fine :)
Update: http://freddyandersen.wordpress.com/2010/10/03/mysql-5-5-snow-leopard-and-rails/. This link should solve your problem. I faced the same problem on my other mac :)
If you're using Rails 3, you should definitely be using Bundler and not doing sudo gem install anything. Add mysql2 to your Gemfile and just run bundle. That should install without any errors and let you run rake commands.
I've been struggling with this for a few hours. Everything just stopped working and I can't get it to work anymore. I'm a noob at Ruby, Ruby on Rails and the Terminal in general. This is really frustrating me so I just try to describe my problem as detailed as possible hoping someone can give me a solution.
I'm on Mac OS X Snow Leopard. I couldn't get Rails working at all just now: Could not find gem 'rails' headaches
But after some tries of reinstalling it, it suddenly worked again. But now I just can't get MySQL to work, and it sometimes even breaks the Rails installation again.
This is what I do:
sudo gem uninstall rails
sudo gem uninstall mysql
sudo gem uninstall mysql2
After these commands, I check the installed gems with gem list. No MySQL gem is listed anymore, but I can still see rails (2.3.5, 2.2.2, 1.2.6)
. Is this normal? Does this mean I have 3 Rails installations? It doesn't make sense to me. Anyway, then I do this:
sudo gem clean
Which fails completely. I get a bunch of errors like this:
Attempting to uninstall fcgi-0.8.7
Unable to uninstall fcgi-0.8.7:
Gem::InstallError: cannot uninstall, check gem list -d fcgi
It doesn't uninstall anything. At this point, I try to install everything again. I start with:
sudo gem install rails
Which succeeds (I think):
Successfully installed rails-3.0.3
Successfully installed builder-2.1.2
2 gems installed
Installing ri documentation for rails-3.0.3...
File not found: lib
Then, I update RubyGems:
sudo gem update --system
sudo gem install rubygems-update
sudo update_rubygems
Then it says I have 1.3.7 installed, so it succeeded, I think. So now I proceed with installing MySQL. I already got MySQL 5.5.8 installed on my machine. I did some research about installing MySQL on Snow Leopard, and it seems I have to use this command:
sudo env ARCHFLAGS="-arch x86_64" gem install mysql -- --with-mysql-config=/usr/local/mysql/bin/mysql_config
I get a bunch of errors like this:
No definition for time_set_neg
No definition for time_set_second_part
No definition for time_equal
No definition for error_errno
At this point, I assume I got both Rails and the MySQL gem installed, so I try to start a new project.
rails new user_group -d mysql
It works! Rails is installed correctly. Now, I try generating a model.
cd user_group
rails generate model User
It fails with this error:
Could not find gem 'mysql2 (>= 0, runtime)' in any of the gem sources listed in your Gemfile.
Try running bundle install.
So I try running bundle install. It installs a lot of gems. Then I try to generate my model again. I get this error:
Library/Ruby/Gems/1.8/gems/mysql2-0.2.6/lib/mysql2/mysql2.bundle: dlopen(/Library/Ruby/Gems/1.8/gems/mysql2-0.2.6/lib/mysql2/mysql2.bundle, 9): Library not loaded: libmysqlclient.16.dylib (LoadError)
Referenced from: /Library/Ruby/Gems/1.8/gems/mysql2-0.2.6/lib/mysql2/mysql2.bundle
Reason: image not found - /Library/Ruby/Gems/1.8/gems/mysql2-0.2.6/lib/mysql2/mysql2.bundle
This is as far as I can get. What should I do? And why should this be so hard...
Snow Leopard supplies Ruby 1.8.7. Ruby 1.8.7 doesn't automatically add the require 'rubygems' command to a Ruby script, like 1.9.2 will, so in general you need to add that to your script. That fixes the problems with Ruby not finding the gems called by your code in a lot of cases. Rails is a different animal, but the version with 1.8.7 is well documented so you should have found a fix pretty quickly.
The Ruby supplied by Snow Leopard is really for its own use. Users can piggyback on that, but it's installed by Apple because they have applications that use it. Use locate podcast | grep rb$ to see. Similarly, Perl and Python in Snow Leopard are used to support code Apple has installed so messing with them is not a good idea. Changing the built-in Ruby, Perl or Python usually won't cause the system to explode in flames, but it can cause irritating and unexplained problems farther down the road when system maintenance routines stop working.
By using sudo to remove gems installed by Apple and add new ones, you've left your system Ruby in an unexpected state as far as Apple's apps are concerned. Rather than mess with Apple's Ruby, you should install a separate Ruby for your own use using Fink or MacPorts, or from source code, or by using RVM.
Personally, I use RVM because it creates a ~/.rvm sandbox in your home directory, and makes it easy to manage multiple versions of Ruby and gems. RVM requires you to install the XCode development library, which you can download from http://developer.apple.com/technologies/ after a free registration. XCode is also on your system DVD, but that version is reported to be buggy, so use the downloaded version.
Make sure to add the MySql gem to that projects gemfile with the following code:
gem 'mysql', '2.8.1'
Run a bundle install/update and try it. You told it to use MySQL and the gem might even be installed, but you aren't loading it.
Also, you're failing at a couple of points: notice the
File not found: lib
Then again, I could be completely wrong about this - it's my attempt at providing a clue for your troubleshooting.
I have updated to rails 3 on my Snow leopard. Previously i use sqlite for development.
It's working fine when i rake db:create.
Now I'm trying to install mysql on my mac.
I downloaded mysql-5.1.50-osx10.6-x86.dmg
Installed all three file.(mysql-{version}-osx10.5-x86.pkg, MySQL.prefPane, MySQLStartupItem.pkg)
execute this to install gem.
sudo env ARCHFLAGS="-arch i386" gem install mysql -- \
--with-mysql-dir=/usr/local/mysql --with-mysql-lib=/usr/local/mysql/lib \
--with-mysql-include=/usr/local/mysql/include
Everything is good. gem created with no error.
I create new project with rails new p1 -d mysql
Proceed with
rake db:create
it shows
Could not find gem 'mysql2 (>= 0, runtime)' in any of the gem sources.
Try running `bundle install`.
Then I install new gem. sudo gem install mysql2.
same problem. i got
dyld: lazy symbol binding failed: Symbol not found: _mysql_init
Referenced from: /Library/Ruby/Gems/1.8/gems/mysql2-0.2.3/lib/mysql2/mysql2.bundle
Expected in: flat namespace
dyld: Symbol not found: _mysql_init
Referenced from: /Library/Ruby/Gems/1.8/gems/mysql2-0.2.3/lib/mysql2/mysql2.bundle
Expected in: flat namespace
Trace/BPT trap
I deleted the duplicate mysql2.bundle. The result is same. error.
i have read almost all articles on the net. But could solve this problem.
Is it because i installed 32 bit mysql on snow leopard? or my rubygems problem?
Why rails 3 suddenly asking for mysql2 gem since i use '-d mysql'.
Rails 3 + MySql on mac
Thank you. Have a nice day.
Rails switched to mysql2, see wycat's blog.
i did multiple try and error with
mysql-5.1.50-osx10.6-x86
mysql-5.1.50-osx10.6-x86_64
I received mysql.prefpane and dyld: lazy symbol binding failed: Symbol not found: _mysql_init problem.
Then I found a post at http://weblog.rubyonrails.org/.
It says i need to install
mysql-5.1.50-osx10.5-x86_64
works better. solved both problem. but still got errno: 2. Which i can't create database.
Solved errno:2 by REBOOT the system.
Try to install http://rubygems.org/gems/ruby-mysql
We struggled with this for about two hours, reinstalled mysql a couple times, and eventually solved our problem with an "rvm implode" and subsequent reinstall of rvm. This deletes everything under .rvm, so be careful, but if you're using rvm, it's worth a shot.
Trying to start a new Rails 3 beta 4 app with mysql.... Running OS X Snow Leopard. WIth previous versions of Rails I have no problem with MySQL. But now when I start the Rails 3 app I get the following error when I click "About Your Application Environment" on the Rails index.html startup screen:
undefined method `init' for Mysql:Class
Change your Gemfile to use 'mysql2', it's a more modern driver and has nicer features as other people have mentioned.
New Rails applications use the mysql2 gem by default.
I ran into the same issue (RoR 3, OSX 10.6, mysql 2.8.1 gem).
You can use irb to rule out RoR:
irb
require 'rubygems'
require 'mysql'
db = Mysql.connect('hostname', 'username', 'password', 'database')
If the above doesn't work, you may want to try removing the mysql gem and reinstalling it. I came across a post saying bundle install might mess up the install without displaying errors.
sudo gem uninstall mysql
sudo env ARCHFLAGS="-arch x86_64" gem install mysql -- --with-mysql-config=/usr/local/mysql/bin/mysql_config
Verify things work via irb, then start up rails again.
I ended up switching from the mysql gem to the ruby-mysql gem, worked.
For simple usage, which is typical (connecting, querying, iterating over results), I found mysql2 gem which is much faster than mysql or ruby-mysql gems and auto-casts values to proper types. And it installes perfectly on Snow Leopard while I couldn't get mysql gem to work.
More info at http://github.com/brianmario/mysql2
I think I have found the solution for the problem. In my case the problem was that the mysql gem hasn't been properly installed using the bundler . when I did this:
bundle install mysql (noobish mistake)
all gems went to mysql directory, but later on I have checked the docs of the bundler gem
and did this:
bundle install bundler_files ( to know where the gems are in the future)
everything looked almost ok except that when mysql gem was installing i got some errors.
I noticed that it was because of my folder path "/home/pawel/Aptana Studio Workspace/myrails_app"
If you have spaces in your folder path this gem wont install properly and later on when you modify the path to one without spaces and try to install the mysql gem IT WONT DISPLAY ANY ERRORS, but the installation will be corrupted, because you will have some extra folders there with some files etc. so
DELETE THE GEM FOLDER CREATED BY BUNDLER AND REINSTALL GEMS WITH THIS COMMAND:
bundle install
That solved the problem.
you can try switching to the mysql2 gem which should resolve all that issues for you. see: https://github.com/brianmario/mysql2/
I think what happens is that the mysql gem isn't able to load the mysql dynamic library (supposed to be supplied by the native MySQL installation). To test whether this is happening, do this
$ irb
1.9.2p320 :001 > require 'mysql_api'
=> true
1.9.2p320 :002 >
If it isn't able to load this low level mysql_api, (which actually supplies the functionality to the mysql gem), it will give you some potentially useful errors. Usually it is not able to find the dynamic library. To remedy this, I found a couple of solutions:
From http://wonko.com/post/how-to-install-the-mysqlruby-gem-on-mac-os-x-leopard, do this
For system-wide install
sudo env ARCHFLAGS="-arch i386" gem install mysql -- \
--with-mysql-dir=/usr/local/mysql --with-mysql-lib=/usr/local/mysql/lib \
--with-mysql-include=/usr/local/mysql/include
or local install
env ARCHFLAGS="-arch i386" gem install mysql -- \
--with-mysql-dir=/usr/local/mysql --with-mysql-lib=/usr/local/mysql/lib \
--with-mysql-include=/usr/local/mysql/include
and then from http://alexbraunstein.com/2011/08/12/library-loaded-libmysqlclient-18-dylib/ put in .bash_profile:
export DYLD_LIBRARY_PATH=/usr/local/mysql/lib:$DYLD_LIBRARY_PATH
I has the same issue after upgrading to Snow Leopard. On installing the MySQL gem, I got a bunch of errors about the documentation, then, on running the server:
undefined method `init' for Mysql:Class
I was also having some similar, but unrelated issues with other gems, particularly those that had C components that needed compiling such as RedCloth and hpricot:
Unable to compile native extensions
These errors were to do with native extensions in base 64 architecture. The solution was threefold:
I reinstalled XCode 4. The upgrade to Snow Leopard had broken my C compiler, so some gems were failing to compile. This took me a step closer, but didn't fix the issue.
I blew away and reinstalled RVM. It appeared to be installing gems in one directory, and finding them in another. This fixed every native architecture base64 error, but the MySQL gem was still failing.
I removed and downgraded MySQL to version 5.1. This fixed the MySQL gem issue.
All is now well again.
I just upgraded to Mac OSX Snow Leopard, and recompiled mysql (5.1.39) with the Snow Leopard XCode. I also reinstalled the latest mysql gem.
Now, when running
rake db:migrate
in a rails app, I get
dyld: NSLinkModule() error
dyld: Library not loaded: /usr/local/mysql/lib/libmysqlclient.15.dylib
Referenced from: /usr/local/lib/ruby/gems/1.8/gems/mysql-2.7/lib/mysql.bundle
Reason: image not found
Trace/BPT trap
I have /usr/local/mysql/lib/libmysqlclient.16.dylib, but not ...15.dylib.
Do I need to use an earlier version of mysql?
No it almost looks like you need to remove the mysql gem and then re-install it using
gem install mysql -- --with-mysql-dir=/path/to/mysql_dir (sometimes /usr/local/mysql)
Try hammering in which version of mysql for the gem to use:
gem install mysql -- --with-mysql-config=/path/to/mysql_config
Thanks for the help!
I ended up removing mysql completely:
http://akrabat.com/2008/09/11/uninstalling-mysql-on-mac-os-x-leopard/
Then compiling and installing the following to /usr/local:
readline 6.0
ruby 1.8.7
rubygems
With help from
http://hivelogic.com/articles/compiling-ruby-rubygems-and-rails-on-snow-leopard