When I try to run "rails server" on a new project it returns
Could not find gem 'mysql2 (>= 0) X86-mingw32' in any of the gem sources listed in your Gemfile.
Run 'bundle install' to install missing gems.
I ran 'bundle install' but I'm getting the same error.
I already had mysql installed from the xampp package, but my friend helped me install rails so I'm not sure how he configured it. I use Windows Vista.
Try gem install mysql2. It should then work.
I ran into this issue a while back setting up a RoR dev environment on a windows machine. Had to copy the dll to the ruby/bin folder. See the thread from ruby-forum...
http://www.ruby-forum.com/topic/150580
I had a similar issue. For me, I needed to remove the old Gemfile.lock and allow it be re-generated by running bundle update after I added the same version of mysql to the Gemfile that I had installed via "gem install mysql".
This may or may not be the issue you were running in to, but it appears this error message -> "Could not find gem 'mysql'" can be caused for this reason as well.
I had a similar issue, but when trying to gem install mysql2, it would give me a can't find header files for ruby at ... error message.
Running this fixed the issue for me: sudo apt-get install ruby-dev
Related
I'm trying to connect my app to localhost:3000 to try and run ruby on rails but when I put localhost:3000 into browser it downloads a file. So when I kept looking for something to resolve this problem it kept saying to go and do a bundle install and then after it's done it then says error and says try and install 'gem install mysql2 -v 0.3.14 before bundling. So i do that and go and bundle install again and it gives me the same error
the problem seems like bundler cannot install mysql2 gem, thats why bundler says to install it explicitly .
try run gem install mysql2 and see what are the errors you are getting. I'm not sure about windows but in linux the common problem is lack of header files.
and this SO question might also give you some hint..
recently i made web application and want to atatch my database with it ..though i followed steps of doing it but still i am getting error ..i dont know where's problem i did in steps .. please let me know where i am wrong
please help me where i am wrong or what i skipped ..
thankyou..
I had problems install caldecott , i got the
ERROR: Error installing caldecott:
ERROR: Failed to build gem native extension.
"C:/Program Files/ruby-1.9.2/bin/ruby.exe" extconf.rb
*** extconf.rb failed ***
error :
i found this resource : http://www.clausconrad.com/blog/installing-caldecott-on-windows
which was helpfull but my problem was i had multiple ruby installations on my system !
so make sure you are using the right ruby installation and delete the others if needed :
i had :
C:/Program Files/ruby-1.9.2/bin/ruby.exe
and
C:\Ruby193\bin\ruby.exe
i deleted the first one and everything went fine , be sure to install the devkit like the link says , and everything should be allright.
There's an issue installing eventmachine on Windows. Try this instead:
gem install eventmachine --pre
gem install caldecott
To install Caldecott requires Ruby 1.9.2.
Check version by
ruby -v
if not 1.9
update the version and re try to install
first make sure that you installed C compiler in your local computer...
if you are using Linux you can run the following command:
sudo apt-get install g++
if you are in windows you will have find a C compiler from the net.
After installing this C compiler, you can now run
sudo gem install caldecott
If this is not working, try
ruby -v
to see if the version is 1.9.3 or above....
then repeat
hope that helps
I have been trying to configure rails in windows. Ruby has got successfully installed but when i tried to give gem update --system command in my cmd prompt the following happens. MySQL is already installed in my system and is working fine.
C:\Ruby187\bin>gem update --system
Updating RubyGems
Updating rubygems-update
Successfully installed rubygems-update-1.8.11
Updating RubyGems to 1.8.11
Installing RubyGems 1.8.11
RubyGems 1.8.11 installed
== 1.8.11 / 2011-10-03
* Bug fix:
* Deprecate was moved to Gem::Deprecate to stop polluting the top-level
namespace.
------------------------------------------------------------------------------
RubyGems installed the following executables:
C:/Ruby187/bin/gem
C:\Ruby187\bin>
please help me in this solving this issue. Thanks in advance.
I doesn't see any errors?
Type
gem -v
and you see your current gem version
In our team we used to get this problem everytime we svn up. We have configured bundle in our application. Here we have a list of gems in a file called GemFile. So every time we svn up our code we need to ./bundle install to have all our required gems for this application. This solved our problem.
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.
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.