Ruby mysql2 gem, cannot build on Windows 7 - mysql

I come from OSX where Ruby runs super flawlessly 90% of the time. I haven't touched it in awhile though and happen to be working on a Windows 7 machine right now. I'm trying to run a simple Ruby on Rails project but I can't seem to get past any of my database setup.
I want to run on mysql but when I try to install the mysql2 gem (via bundle install or gem install mysql2) I get these errors:
Installing mysql2 (0.2.9) with native
extensions
C:/Ruby192/lib/ruby/site_ruby/1
.9.1/rubygems/installer.rb:533:in
`rescue in block in build_extensions':
ERROR: Failed to build gem native
extension.
(Gem::Installer::ExtensionBuildError)
C:/Ruby192/bin/ruby.exe extconf.rb checking for
rb_thread_blocking_region()... *
extconf.rb failed * Could not create
Makefile due to some reason, probably
lack of necessary libraries and/or
headers. Check the mkmf.log file for
more details. You may need
configuration options.
I'm pretty much a complete newb when it comes to this kind of thing so if anyone has any advice, please help!

To install and compile extensions sometimes you need libraries and headers of the dependencies. In this case, you need MySQL headers and libraries to properly compile.
Assuming you downloaded Ruby from RubyInstaller and also installed the Development Kit and followed it's installation instructions, to successfuly install mysql2 gem I recommend you read this answer in our Troubleshooting page:
Download MySQL Connector/C
Extract into a path without spaces
When installing mysql2 gem, provide the additional options (gem install mysql2 -v 0.2.10 -- --with-mysql-include=... --with-mysql-lib...)
Provide for --with-mysql-include option the path to the include directory of MySQL Connector/C. The same for --with-mysql-lib but this time point to lib directory.
Don't forget to copy libmysql.dll to your Ruby bin directory.
Hope this helps.

The problem with native extensions on Windows is that there are two different compiler infrastructures: one based on MS VC and its Visual Studio and one based on MinGW (Minimalist GCC for Windows).
There are Ruby native extensions that can be compiled with any of them and other, that only support one. And since most of them come from some kind of Unix, chances are that mingw works better that MSVC.
So you may try to install mingw and use it to compile mysql gem - there is a special package called devkit, which contains a minimal necessary mingw installation which you just put inside your ruby installation.
I had a success compiling several native extensions using devkit: eventmachine, linecache, bson-ext to name a few. And within devkit you will feel much more are home :-) (coming from OSX)

If you have the devkit setup correct as #Tomasz mentions, please make sure you check the compatibility of mysql2 gem version with windows, I have experienced in the past for it to cause issues and had to go and install a previous version to get it working. Last I remember v0.2.6 was the version that supported windows.

Related

Having issues attaching ruby to mysql using the mysql2 gem

Rails version 6.0.4.6
Ruby Version 2.7.5p203
mySql version 8
OS Window 10
I am having issues getting the mysql2 gem to work. The latest error I have is not being able to locate "mysql2 x64-mingw32" file. I installed the gem using this command:
gem install mysql2 --platform=ruby -- --with-mysql-dir="C:\Program Files\MySQL\Connector C++ 8.0"
--with_mysql-lib="C:\Program Files\MySQL\Connector C++ 8.0\lib64" --with_mysql_include="C:\Program Files\MySQL\Connector C++ 8.0\include"
It appears to have been installed correctly but still will not work. I have run bundle install. I have also tried deleting the gem.lock file and the running bundle install.
If anyone has had success in getting ruby to work with MySQL on a Windows machine, please let me know how you did it.
After many trails, it appears the Ruby just doesn't play well with Windows OS. While I expect that some do use Ruby on Windows, it appears the support is lacking, and the community is small.
I installed a Linux terminal on my machine and had much better luck.
Just posting to keep other from pulling their hair out.

193: %1 is not a valid Win32 application error with Ruby (1.9.3) on Rails(3.2.3) with MySQL(5.5) on Windows 7

I cannot seem to run a rail application configured to MySQL. When I run the project, I get the following error:
193: %1 is not a valid Win32 application. - C:/Ruby193/lib/ruby/gems/1.9.1/gems/mysql-2.8.1-x86-mingw32/lib/1.9/mysql_api.so
I've noticed others have hit this but I didn't find any solutions that worked for me. Here's what I've tried so far:
Copying libmysql.dll to the ruby bin folder
Tried older version of MySQL (5.0)
Checked the ImagePath for MySQL on regedit
Can anyone provide guidance here? Is this just a lost cause? Does using Linux or other versions of Ruby/Rails/MySQL combo fix this?
Looks that you installed the binary pre-compiled version of MySQL gem, which requires an specific version of MySQL to be installed.
More important, it requires an specific version of libmysql.dll be available in the PATH so the gem can use it.
I would recommend you uninstall the pre-compiled gem and proceed with the manual compilation steps described here:
http://blog.mmediasys.com/2011/07/07/installing-mysql-on-windows-7-x64-and-using-ruby-with-it/
This has been answered before too:
Ruby Gem for mysql 5.5 in windows
Is Datamapper's dm_mysql_adapter gem supported on windows?
Finally installed MySQL for Rails in Windows 64 bit, and now
on windows Mysql native extension prob in ruby on rails gem time
Hope that helps.

Just started ROR Lynda Tutorial, Error while trying to execute rails server

Just started ROR Lynda Tutorial, Error while trying to execute the rails server in terminal.
New to ROR. Followed tutorial closely and installed all necessary gems and files. Creating a simple CMS. However I'm stuck with the following error.
$ rails server
NOTE: Gem.source_index is deprecated, use Specification. It will be removed on or after 2011-11-01.
Gem.source_index called from /Library/Ruby/Gems/1.8/gems/bundler-1.0.10/lib/bundler/shared_helpers.rb:3.
NOTE: Gem.source_index is deprecated, use Specification. It will be removed on or after 2011-11-01.
Gem.source_index called from /Library/Ruby/Gems/1.8/gems/bundler-1.0.10/lib/bundler/source.rb:162.
NOTE: Gem::SourceIndex#each is deprecated with no replacement. It will be removed on or after 2011-11-01.
Gem::SourceIndex#each called from /Library/Ruby/Gems/1.8/gems/bundler-1.0.10/lib/bundler/source.rb:162.
Could not find gem 'mysql2 (~> 0.2.6)' in any of the gem sources listed in your Gemfile.
I have installed MySQL server version 5.5.13. I have Rails version 3. I have the MySQL(0.3.2) gem file installed. Any help would be appreciated. Thanks
The best way to fix this is to run
gem pristine --all
This rebuilds the Gems and should get rid of the error for you.
From the error I see that most likely your setup is not right. You should do a 'bundle check' to see if all dependencies have been met, I am quite sure they haven't. If you haven't yet done a 'bundle install' you need to do so, if you've done that already, then the problem is that bundler wasn't able to install mysql2 gem version 0.2.6 (it must be mentioned somewhere either in you Gemfile or somehow in the Gemfile.lock in case you've got that from somewhere else). So you would then either bundle install will fix it, or if not, then you should probably do a 'bundle update mysql2'

Installing Rails, MySQL, etc. everything goes wrong

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.

ruby on rails + xampp + mysql (windows 7)

I am trying to use the mysql package included in xampp with ruby on rails on windows 7, but cannot seem to get them to work together.
I have rails 3.0.0 and xampp 1.7.3
rails works with sqlite within xampp just fine, but when attempting to use mysql via "rails new project -d mysql; cd project; bundle install"
I get the following:
Installing mysql2 (0.2.4) with native extensions C:/xampp/Ruby192/lib/ruby/1.9.1
/rubygems/installer.rb:483:in `rescue in block in build_extensions': ERROR: Fail
ed to build gem native extension. (Gem::Installer::ExtensionBuildError)
C:/xampp/Ruby192/bin/ruby.exe extconf.rb
checking for rb_thread_blocking_region()... *** extconf.rb failed ***
Could not create Makefile due to some reason, probably lack of
necessary libraries and/or headers. Check the mkmf.log file for more
details. You may need configuration options.
Am I missing anything? All the posts about this issue tell me to use gem install mysql -- --with-mysql-config=PATH, but this does not seem to work with Windows, as I get the same error regardless.
And if it's just not possible, are there any drawbacks to using sqlite now, then trying to migrate the databse over to mysql (or another more robust database) later?
Did you install the mysql gem?
gem install mysql
After this you need to go to the mysql\bin directory in your XAMPP folder and copy the
libmysql.dll
into your ruby\bin folder.
Give it a try and let me know if it works. Also if your MySql version is 5.1 you may need to download a 5.0 version of the same dll.
gem install mysql --no-rdoc --no-ri -- '--with-mysql-lib="D:\xampp\mysql\lib" --with-mysql-include="D:\xampp\mysql\include"'
I used this code for my solution of mysql this is the right way you can USE mysql for xampp.
I once had a similar issue. The important things i noted was that i already have mysql installed for usage via xampp. Firstly, you should make sure that the mysql installation is accessible from cmd by typing
mysql --version
If it gives you a reply of our installation then you're good to go to the next step else copy the mysql bin directory and save it in your user environment variable called PATH. This should allow you to run the cmd code above fruitfully.
Next Step: run (on cmd)
gem install mysql2 --no-rdoc --no-ri
This worked for me.