What is the difference between for example using
rails db:migrate
and
bundle exec rake db:migrate
when using the rails framework? It seems to do the same for me...
Two fold. As of rails 5 you can substitute rails and rake for db:migrate. What you are really changing is adding bundle exec which is telling it to execute the rake from the application's bundler instead of your platform bundler.
For instance, you have bundler v15 on your mac, and bundler v12 on the application. bundle exec rake will use bundler v12, but rake will use bundler v15.
rails db:migrate vs bundle exec rake db:migrate
Internally rails is proxying commands to rake.
See this link
Related
When I do rake db:migrate, I get the following error:
rake aborted!
Gem::LoadError: You have already activated rake 10.2.2, but your Gemfile requires rake 10.1.0. Using bundle exec may solve this.
How can solve this?
This error is due to the fact that some applications may specify different versions of gems than the ones you have installed.
Try using bundle exec rake db:migrate.
Using bundle exec guarantees that the program is run with the environment specified in the gemfile.
Perhaps:
bundle exec rake db:migrate
There might be other gems in the Gemfile which are dependent on rake 10.2.2, while you are trying to install rake 10.1.0 via your gemfile or explicitly mentioned it. A look into your Gemfile will help.
In case you have specific environment, you may want to run
bundle exec rake db:migrate
to make sure you are running it appropriately.
As per another answer given on this topic, you can also try deleting the Gemfile.lock file and re-running bundle install to regenerate the Gem dependencies.
After this error in my web page when i have run > rake db:migrate. It shows error such as:
rake aborted!
you have already activated rake 10.1.1 but you gemfile requires rake 10.1.0 using bundle exec may solve this.
when i tried with bundle exec rake db:migrate it works.
And when i tried with the rake db:migrate. i shows error
My question is:
What is the difference between bundle exec rake db:migrate and rake db:migrate.
every time i have to do like this if yes then why?
What is the problem in my project.
Thanks.
bundle exec rake db:migrate will run rake db:migrate with the environment of your Gemfile.
You have an error because your Gemfile requires a version of rake but you have a newer one installed on your system.
By default, rake will run the latest available version, hence the mismatch.
You should always prefix your commands with bundle exec inside a project managed by bundler, I personally alias bx to bundle exec.
You can also use binstubs
Try to run bundle update.
It seems, that your Gemfile.lock is out of sync with your Gemfile.
I recently installed Rails 3.1 and now my old Rails 3.0 app won't rake db:migrate. This is what happens when I try to run bundle exec rake db:migrate. I'm on Ubuntu with no RVM
/usr/local/lib/ruby/gems/1.9.1/gems/bundler-1.0.7/lib/bundler/shared_helpers.rb:142:in `block in cripple_rubygems': can't find executable rake (Gem::Exception)
from /usr/local/lib/ruby/gems/1.9.1/bin/rake:19:in `<main>'
When I run just rake db:migrate, it outputs:
rake aborted!
You have already activated rake 0.9.2.2, but your Gemfile requires rake 0.8.7. Consider using bundle exec.
(See full trace by running task with --trace)
which rake
/usr/local/bin/rake
Put this in your Gemfile:
gem 'rake' , '>= 0.9.2'
and run bundle update
you need to give more details in what environment you're running this:
which OS?
are you using RVM?
is this a brand new RVM setup per chance?
1) Try to run this:
gem list | rake
what output do you get?
2) If you don't see rake in the output, then do this:
gem install rake
and then try rake db:migrate again
3) If you see rake, but it still doesn't work, then do this:
which rake
what output do you get? it should look something like this:
~/.rvm/gems/ruby-1.9.2-p0/bin/rake
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 have Rake version 0.9.1 but I need to use 0.8.7 for a project, and I'm fairly certain I have both version installed but it always uses 0.9.1 by default. Is there a way to specify which version of Rake to use?
I'm trying to run this: rake db:drop db:create db:migrate db:seed
and I get this error:
You have already activated rake 0.9.1, but your Gemfile requires rake 0.8.7. Consider using bundle exec.
gem search (or list) rake, should tell you which versions are installed.
You can invoke rake with a specific version number bracketed with
underscores.
$rake _0.7.3_
This is a standard feature of gem packaged binaries.
You can specify the version of Rake to use, in your Gemfile:
gem 'rake', '0.8.7'
Though the "error" message you are getting says it all... you need to run:
bundle exec rake ...
... in order to use the right rake to run your rake tasks.
More info on bundle exec: http://gembundler.com/man/bundle-exec.1.html
Try executing gem uninstall rake then just pick the version you want to uninstall.
It happens because you are using rake from the system. (latest version by default)
The solution is use follow command:
bundle exec rake db:migrate
Also, you can create alias. Because this command is too big and difficult to write.
echo "alias be='bundle exec'" >> ~/.bash_profile
source ~/.bash_profile
Then you can use follow short command:
be rake db:migrate