When I try doing rake db:migrate I get this error
rake aborted! uninitialized constant Rake::DSL
/home/laptop/RubymineProjects/website2/Rakefile:10
What do I have to do to fix this? I tried with multiple different rake versions. I'm running Rails 3.0.9, Ruby 1.8.7 and Ubuntu 11.04.
Include this in your Rakefile
require 'rake/dsl_definition'
Then bundle install and you're (hopefully) good to go :)
If this didn't work, try the following:
You're probably using Rake 0.87 so gem install rake -v=0.9.2 is something you should do.
Then remove old rake with gem uninstall rake -v=0.9.1
Then bundle update
And if you still have any problem then...
Add the following to your Rake file
module ::YourApplicationName
class Application
include Rake::DSL
end
end
Comment below if you are having any problem after all this little hacks...
on Debian Squeeze this is what I do to fix that:
Configure squeeze-backports and upgrade rubygems
apt-get install -t squeeze-backports rubygems
remove rake and it's executable
gem uninstall rake
rm /usr/bin/rake
install rake again, now the executable file will be /usr/local/bin/rake and error is gone
gem install rake
Related
I've been running a Rails 3.2 with Ruby 1.9.3 for a while now. Recently I added Rails 5.1 and Ruby 2.4.
I used rvm to install Ruby2.4.
Today I had occasion to cd into one of my old projects and run rake db:migrate, and I got the following message:
Gem::LoadError: You have already activated rake 12.0.0, but your Gemfile requires rake 0.9.2.2. Prepending `bundle exec` to your command may solve this.
Prepending 'bundle exec' did solve the problem but for my knowledge I would like to understand what happened. I thought the whole point of a Gem file within the project was to lock in the required gems.
So somewhere on my machine clearly there is still rake 0.9.2.2 but why did my command 'rake db:migrate' not use that automatically?
Reason: Some of the gem might have locked rake gem to that version.You are getting this as version of rake inside gemlock file is different than the one you have already installed.
Solution1:
bundle update
Solution2:
edit the gemlock file. open Gemfile.lock and change
rake (0.9.2.2) to rake (12.0.0)
Solution3:
remove Gemfile.lock and run bundle install once again.This will create
Gemfile.lock once again.
I am using 'rake 0.8.7' in my Rails project and yet when I still try either rake routes or bundle exec rake routes I still get
rake aborted!
uninitialized constant Rake::DSL
If I try putting the recommended require 'rake/dsl_definition' in my Rakefile it gives me
rake aborted!
no such file to load -- rake/dsl_definition
So, I'm stuck at how to fix this. I can't run any rake commands...
That error sounds like you are using something in your app that requires a more recent version of rake than 0.8.7. Believe Rake::DSL only showed up in rake 0.9.0.
The most recent version of Rails advertises itself as working with rake as old as 0.8.7. Perhaps it's wrong. More likely you're using some other gem in your project which requires a more recent rake.
Why and how are you using rake 0.8.7 in your project instead of a more recent one? Unless you've locked to rake 0.8.7 in your gemfile (or are using some other gem that insists on 0.8.7), you should be able to run bundle update rake to upgrade to the most recent version of rake.
If you have multiple versions of rake installed, you may have to run bundle exec rake ..., as you noted. But in your project, bundle exec rake still gets you 0.8.7, because for whatever reason that's the version of rake your Gemfile.lock is currently set to -- but your project is using something that wants a more recent version.
When trying to rake db:migrate on Heroku. I'm getting the following error.
rake aborted!
uninitialized constant Rake::DSL
From what I've gathered this seems to be a bug with Rake 0.9.2. If I do "gem list" locally only Rake (0.8.7) appears to be installed.
I've tried adding "gem 'rake', '0.8.7'" to my gem file and running bundle install but then I get the following error.
You have requested:
rake = 0.8.7
The bundle currently has rake locked at 0.9.2.
Try running `bundle update rake`
If I do run bundle update rake, it reverts back to 0.9.2, and I'm back where I started.
Am I missing something obvious here?
You should run commands with bundle exec to ensure your getting the proper dependencies. So run:
bundle exec rake db:migrate
For a more detailed post see Yehuda Katz blog post http://yehudakatz.com/2011/05/30/gem-versioning-and-bundler-doing-it-right/
If you still continue to have problems there appears to be several other people with the same issue How to fix the uninitialized constant Rake::DSL problem on Heroku? which they resolved by adding the following to their Rakefile:
require 'rake/dsl_definition'
require 'rake'
I got this error when doing "heroku rake db:migrate".
In /app:
rake aborted!
uninitialized constant Rake::DSL
/usr/ruby1.9.2/lib/ruby/1.9.1/rake.rb:2482:in `const_missing'
....
...
....
..
etc...
I fixed it by adding
require 'rake/dsl_definition'
in RakeFile and then typed in
bundle update rake
git add .
git commit -m "Change RakeFile"
git push heroku
heroku rake db:migrate
This one solved my problem. I didn't add gem 'rake', '0.8.7' in my gem file
and my gem list shows rake (0.9.2, 0.8.7).
I have a blog post about this, You have already activated Rake 0.9.2. There are two ways to do this:
Only use the older version of Rake:
Check out your current Rake versions with $ gem list. See which versions of Rake you have and remove them all except for0.8.7. You can remove the gems with gem uninstall rake -v=0.9.1 or whatever version you need to remove.
Or just add a one liner to your Rake file:
Unless you have to use the older version of Rake it is easier to add this linerequire 'rake/dsl_definition' to your Rails's app Rakefile.
require File.expand_path('../config/application', __FILE__)
require 'rake/dsl_definition'
require 'rake'
I used this to solve this very problem earlier without deleting any gems. This method will force your app to use Rake 0.8.7 which is more stable than 0.9+. You must run bundle update rake command after specifying the version of Rake to use so your gemfile.lock file is in sync with your gem file (if you skip this step Heroku will not let you push your code!)
In your gem file specify the version of Rake to use:
"rake", "0.8.7"
Then do:
bundle update rake
If this still isn't working for you, then do:
sudo gem uninstall rake
As with rich's answer (solving this problem without deleting any gems), but with a correction to your step 1., and a few additional steps:
In the gem file specify:
gem 'rake', '0.8.7'
bundle install (Bundler documentation say to always 'bundle install' after changing your gem file)
git commit -am "Fixed heroku rake problem by specifying rake 0.8.7 in Gemfile"
git push heroku
heroku rake db:migrate
I got the same error without steps 3 and 4.
I have been trying to run rake but it seems that ever since I updated ruby gems rake is failing.
This morning I ran:
gem update --system
And ever since, rake has been failing with the following error:
$ rake db:migrate
rake aborted!
undefined method `specifications' for "/usr/lib/ruby/gems/1.9.1":String
/home/cknadler/projects/ecommerce/Rakefile:7:in `<top (required)>'
(See full trace by running task with --trace)
I have been reading about this problem and it seems that there is a problem with rake 0.9.x that breaks rails but when I check my rake version, I am running 0.8.7:
$ rake --version
rake, version 0.8.7
I have tried uninstalling rake and reinstalling it, using bundler, etc and at this point I am pretty stuck. Thanks in advance.
Edit:
My Rakefile (located in my app root directory)
# Add your own tasks in files placed in lib/tasks ending in .rake,
# for example lib/tasks/capistrano.rake, and they will automatically be available to Rake.
require File.expand_path('../config/application', __FILE__)
require 'rake'
Ecommerce::Application.load_tasks
I would suggest using the bundled binary version of rake to avoid this issue.
bundle exec rake db:migrate
If you installed your bundle using binstubs (bundle install --binstubs) then you can also use the bin version of rake which is equivalent to the bundle exec rake command:
bin/rake db:migrate
P.S: I would also recommend using RVM instead of installing Ruby using sudo for all users. This allows you to keep more modular ruby and gem installation.
You should remove rake 0.9.x (you may have 0.9.2 installed) by doing
gem uninstall rake -v=0.9.2
And then run bundle update
bundle update
Hope that helps.
I just cloned a github repo on a fresh Ubuntu machine, running sqlite3 for all environments. rake db:create says development.sqlite3 already exists. rake db:migrate says I'm missing a bunch of required gems and should run rake gems:install. rake gems:install, of course, says it Could not find table 'studies', which sounds to me like something rake db:migrate should fix.
I looked around the net and while lots of people have gotten 'could not find table' errors, they all got them from rake db:migrate, not rake gems:install. I'm suspecting it's an application-specific error, but still, any ideas would be appreciated.
PS: Ruby 1.8.7, Rails 2.3.8.
You can always install separate gems with gem install -r <gem name> or gem install -v=<gem version> -r <gem name> command, not using rake.
Is this a Rails 3 app? If so, you should run:
bundle install
Rails 3 uses Bundler instead of the rake tasks to manage gems. http://gembundler.com/
Did you try running with the trace option? Might help pin down the failing gem:
rake -t gems:install