I'm running Mac OSX 10.6.4 and setting up rails for the first time. I've been following a bunch of guides to get set up, specifically these two here and here. Also, I know this question has been asked before, but nothing has helped me and my circumstances are a bit different.
First, let me give you my setup.
I've installed Xcode, but I don't want to use the system ruby so, what I did was, I installed RVM and created two gemsets for different ruby versions (1.8.7#rails2.3.8 and 1.9.2#rails3), cause I also want to try rails 3.
I created a global gemset so that I could install passenger and mysql for 1.8.7 and not have to do it for each project. Then set the global gemset by rvm gemset use global
I had already installed MacPorts in a previous step, so what I've done is install mysql using this command sudo port install mysql5 mysql5-server.
Now I run gem install passenger and then passenger-install-apache2-module. This is where I ran into the first issue. Passenger installed fine, but I got "no definition" errors when it tried to install the documentation.
Finally, I want to install the mysql gem so I followed the steps here by adding rvm_archflags="-arch x86_64" to the ~/.rvmc file and then ran export ARCHFLAGS="-arch x86_64" ; gem install mysql -- --with-mysql-config=/opt/local/lib/mysql5/bin/mysql_config Here is where I ran into the issue again. I got a "Successfully installed mysql-2.8.1" message, but all the documentation returned "no definition" errors!
So, why am I getting these errors when installing gems? What can I do to get them installed without errors and ensure future gem installations don't have this problem?
Note: I'm not using sudo because RVM tells you not to.
Here is a link to your problem. They are saying the same thing and the answer is that it's just noise. Obviously something is not right but there is not and should not be a problem. It's most likely that all is fine and documentation was not created, installed, or linked correctly.
http://www.sitepoint.com/forums/showthread.php?t=629077
A -- alone (as written in step 5) usually means to stop reading options. I expect that this is wrong and doesn't belong here or is incomplete (ie, should be --something).
Related
I'm attempting to start learning Ruby on Rails via a YouTube tutorial series(https://www.youtube.com/watch?v=GY7Ps8fqGdc), but seem to be struggling getting everything properly installed and set up to do so. The tutorial requires MySQL with MySQL Workbench and Ruby on Rails. I've gotten several errors in the first few steps and taken some steps to try to resolve them, here's basically where I've gotten.
Installed the most recent version of MySQL and Ruby on Rails. I ran the rails new [name] -d mysql command without issue and it ran to completion. I then navigated to the newly created project folder and ran the bundle install at which point I was given the following error:
Gem::InstallError: nio4r requires Ruby version >= 2.3.
An error occurred while installing nio4r (2.5.2), and Bundler cannot continue.
Make sure that `gem install nio4r -v '2.5.2'` succeeds before bundling.
At this point I installed version 2.6 of Ruby on the machine, which did not seem to yield any improvements. Basically I think I'm overcomplicating all of this and want to know if anyone has an easy solution to install all the tools required for working in Ruby on Rails.
Thanks
First thing first, you're following a 5 yr old tutorial on youtube.
I would advise to always follow the newer ones even though some of the old ones might still work and the reason is simple; recent tutorials will probably work off the bat.
Now, judging by the video you shared, I can see that you should've installed RVM at some point. Official RVM website
In your terminal run ruby -v and check if you're actually using the Ruby version you just downloaded. To change the ruby version while using rvm you should use in your terminal:
$ rvm list
To check on your available ruby versions installed and then
$ rvm use <version>
This will switch your ruby version to the one you want. ( If you already installed it of course. ) and then try bundle install again.
Since you were asking for an easier solution I'd say to try following Rails official getting started guide. This guide installs the minimum amount of gems which will help you avoid all these version issues and even though it uses sqlite instead of mysql, later on you will be able to switch to mysql if you want with a better understanding of it.
I have a problem that seems very related to that in another post, but I don't understand the solution that was arrived at. I am new to Rails, and have put together a Rails 3 app. I am developing in Windows am trying to deploy it to my (shared) Redhat Linux server via git and capistrano, and using Passenger to serve the pages. The deployment process goes fine, but when I try to look at the webpage I get a Passenger error:
!!! Missing the mysql gem. Add it to your Gemfile: gem 'mysql', '2.8.1'.
In fact, I have added the corresponding line to my Gemfile, and doing a 'gem list' on the server shows that it is there.
In this post, the user helpfully noted exactly the same problem and observed that the Gemfile.lock has the gem for Windows, i.e.
mysql (2.8.1-x86-mingw32).
This is exactly the same in my Gemfile.lock, and so I imagine the same issue is happening for me; one can see that this is the gem in vendor/cache and vendor/bundle.
However, I don't understand how the proposed fix from that post is supposed to work. I can edit the mysql line in Gemfile.lock to be mysql (2.8.1), but then I get a different Passenger error that says
Can't find mysql-2.8.1 in any of the sources.
How can I fix this?
In case someone encounters the same problem, here are some things I did that made it work. I don't understand enough of what was going on to know exactly what did the trick.
First, in the Gemfile, I specified that we wanted both ruby and windows versions of the relevant gems.
gem 'sqlite3-ruby', "~> 1.2.5", :platforms => [:mswin, :ruby_18]
gem 'mysql', "2.8.1", :platforms => [:mswin, :ruby_18]
Then on the production server, after using "cap deploy", I removed the gem mysql-2.81-x86-mingw32 from both vendor/bundle and vendor/cache. My production server lets me 'gem install mysql' and 'gem install sqlite3-ruby' but puts it elsewhere in my home directory; I copied these into vendor/bundle and vendor/cache. I edited the Gemfile.lock to change the line 'mysql (2.8.1-x86-mingw32)' to 'mysql (2.8.1)'. 'bundle install' on the production server then seems to install the linux native gems (at least it says 'building native extensions').
After all this, it seems to work.
Run the command bundle install. I'm sure this will fix your issue.
Also, do not edit or move over the Gemfile.lock. Let bundler take care of that.
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've been fighting with a Rails install on my Mac for some time. The error I'm getting (in my development log) says:
Status: 500 Internal Server Error no such file to load -- mysql
Here's some info:
I can successfully rake db:migrate my application.
I've installed the MySQL gem and it appears in the gem list: mysql (2.8.1).
I have Passenger installed.
The error comes from an existing rails app that works on our production server.
Creating a new Rails app, a new MySQL db (using mysqladmin -uroot create sampledb) works fine.
I've googled this and can't find anything specific to this error. There are a few related results where the solutions relate to paths when installing the MySQL gem. For example,
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
Has anyone else experienced this issue or suggest a solution?
Thanks for the response - the good news is, the problem is solved.
The bad news - I'm not entirely sure what fixed it. I can tell you this: it had something to do with the mysql gem install and all the flags pointing to lib, include and config. There are probably a dozen different versions of the same command floating around out there for Mac OS X Leopard.
The odd thing was that ruby appeared to be connected to mysql on some level (it's ability to rake db for example) but broke when actually loading a page.
The gem install string that ended up working was this:
sudo env ARCHFLAGS="-arch i386" gem install mysql -- --with-mysql-config=/usr/local/mysql/bin/mysql_config
I'd love some clarification on the how's & why's of this. This worked for me, but doesn't include pointers to the app directory, the lib directory or the include directory.
Do you have multiple ruby installed? Try invoking this command to find out: whereis ruby
Which ruby version is you passenger using? You can check this from your apache or nginx configuration
Is the ruby version passenger is using the same as ruby you are using from the command line?
Is mysql gem installed on that ruby version?
Double check if the mysql bin path is in your $PATH system environment variable. If you execute
*echo $PATH*
there must be displayed something like
*/usr/local/mysql/bin*
You can also type
mysql and then the tab-key twice.
If if this doesn't bring up a list of mysql commands (like mysqladmin etc.) the mysql bin path is not set ccorrectly. You can set it by adding the correct directory to your bash profile file.
echo 'export PATH=/usr/local/mysql/bin:$PATH' >> ~/.bash_profile
Please verify up front if
*/usr/local/mysql/bin*
really contains the mysql commands on your Mac. Important: close and reopen the terminal window to make changes work.
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.