I have defined a rake task as follows in a file called file_locker_task.rake
namespace :myspace do
task :process => :environment do
FileLocker.lock_files
end
end
How do I execute this rake task from the command line?
I tried:
rake myspace:process and rake process but both are throwing an error like this:
rake aborted!
Don't know how to build task 'process'
Run rake -T -A from your Rails home directory to see all the tasks that rake knows about. Yours must be in that list for rake to run it.
By default, in a Rails app, rake looks in the lib/tasks directory and its subdirectories for your .rake files. Check that. (I suspect this is the problem.)
According to docs
Any ruby file (including other rakefiles) can be included with a standard Ruby require command.
-
Additional rake files (with the file extension “.rake”) may be placed in rakelib directory located at the top level of a project (i.e. the same directory that contains the main Rakefile). Also, rails projects may include additional rake files in the lib/tasks directory.
Related
I am trying to run a ruby file that updates the database using the rake task . But overtime I run the code, I get an error saying :
rake aborted!
cannot load such file -- app/services/insert_data
The ruby file 'insert_data' is located under the app directory in a folder named 'services'
Here is the rake task I created to run it:
require 'app/services/insert_data'
namespace :record_generate do
task :test do
ruby "app/services/insert_data"
end
end
Please help in removing this error.
To be able to use Rails environment within a rake task you need to declare that:
namespace :record_generate do
task :test => :environment do |_, args|
ruby "app/services/insert_data"
end
end
I think you should try placing your app/services/insert_data inside the script directory. I'm assuming that your ruby file is not a rails model with logic. I would try this.
Get your file and place it in the /script/ directory.
Place these line of code at the top of your file
#! /usr/bin/env ruby
require_relative "../config/environment"
Now on your command line you can do execute this:
rails runner name_of_your_file
That is one way of doing it. If you specifically need to use a rake task I can try posting an answer for that too.
Inside your task :test block try -
Rake.application.rake_require "#{Rails.root}/app/services/insert_data"
While running a rake task in rails 3.1.12 and ruby 1.9.3 ie
rake output:generate_files["abc"] --trace>>test1.txt
rake task is working fine , but the test1.txt is being appended when this rake task is executed again.
So I would like to know whether there is a method so that each time this rake task is executed it overwrites my test1.txt so that i need not clear this file again and again while running the rake task
Just delete the file if present before doing any write in the rake task:
require 'FileUtils'
FileUtils.rm(path_to_txt_file)
# do your job
rake --tasks takes about 18s to run. This is just the time it takes to load all the tasks, as a result any task I define will take at least this amount of time to run :
$time rake --tasks
rake db:clean # Cleaning up database
rake passenger:restart # Restart Application
rake spec # Run specs
real 0m18.816s
user 0m7.306s
sys 0m5.665s
My Rakefile :
$: << "."
require "rubygems"
require "rspec/core/rake_task"
desc "Run those specs"
task :spec do
RSpec::Core::RakeTask.new(:spec) do |t|
t.rspec_opts = %w{--colour --format progress}
t.pattern = 'spec/*_spec.rb'
end
end
task :default => :spec
Any idea why rake takes to much times ?
Thanks
Try spring
Command line will look like:
spring rake -T
It will take more time running the first time, but subsequent runs will be very fast.
This solution worked for me: Faster rake tasks in Rails.
I had to do a little variation where I created a lib/tasks/no_rails directory and put all the Rake files which do not need Rails in there and loaded only those using the above method.
I like the solution Pratik mentions for the general case of loading rails for tasks that need it and not for those that don't, for any rake task without having to remember beforehand.
A less-invasive method to run a rake task that doesn't need rails is to use the -f rake option to tell rake to use a particular Rakefile. This way, rake won't go looking for rake tasks in all of rails.
For example, assuming your task above is in a file called Rakefile at the top level of your project and your Rakefile doesn't do anything that loads Rails like require File.expand_path('../config/application', __FILE__), you can do:
$ rake -f Rakefile spec
and it should run your spec task much faster. Try $ time rake -f Rakefile -T; I did this with a rails-independent Rakefile of mine and got:
real 0m1.543s
user 0m1.308s
sys 0m0.201s
The downside is you have to remember to specify this option every time, and not to specify it if you want to run a rake task from rails like rake db:migrate.
The entire rails environment has to be loaded, therefore even simple rake tasks such as rake --tasks take a while. Opening a console with rails console or script/console takes a similar time. You may try to hack Ruby or Rails to speed up rake, but too much optimization can be bad if you want to switch to a newer version later. Since the rails environment must be loaded, cleaning up routes may also help.
Eventually I would like to get to setting it up as a Rake task and do a cron job, but for right now...all I want to do is take my ruby script that used to work as a standalone script and have it work within my Rails app.
I renamed the file to be .rake instead of .rb and tried doing rake my_script at the command-line, but that gave me this error message:
rake aborted!
Don't know how to build task 'my_script'
(See full trace by running task with --trace)
How do I run this script within my Rails environment?
This is the first time I am doing something like this, so any assistance would be greatly appreciated.
Thanks.
I think what you're looking for is rails runner. I know in Rails 2.3.x you'd do
ruby script/runner <your file>
In Rails 3 it might be slightly different.
http://guides.rubyonrails.org/command_line.html#rails-runner
The primary difference between a runner and a rake task is : runner would boot rails while rake task doesn't (you can tell it to do so).
Since rake can do both (boot/no boot), there's no concept of runner in rails-3 anymore.
So, create a rake task: whatever_name.rake
Example:
desc "This task does awesome stuff"
task :do_awesome_stuff do
awesome_method
end
def awesome_method
#put your ruby code here
end
Now from your command prompt, type rake do_awesome_stuff to execute this rake task.
To make it boot Rails, change task definition to this:
task :do_awesome_stuff => :environment do
I created a new engine in Rails 3.1.3 and apparently there's that rake task that copies over all migrations. I tried following rake abc:install:migrations which threw:
rake aborted!
Don't know how to build task 'abc:install:migrations'
(See full trace by running task with --trace)
I also tried rake abc_engine:install:migrations with the same result.
Then I read bundle exec rake railties:install:migrations or bundle exec rake railties:install:migrations FROM=abc_engine should do the trick too but no success. Nothing was copied even though no error was thrown.
My migrations are located in db/migrate/ within the engine folder and I ran all commands above from spec/dummy/
Does anyone know how to use this new rake task in order to copy migrations from the engine?
I ran this instead:
rake railties:install:migrations
And my migrations were copied from the engine.
Hope this helps.
I finally got found/got lucky with my (similar) issue. For the first error, it just disappeared, not sure why. Then I figured out that I didn't created the migrations using the usual file name format, so the ActiveRecord::Migrator.migrations method was ignoring them.
If the app you're mounting the engine to doesn't already have ActiveRecord (i.e. you're introducing ActiveRecord to your host app for the first time by mounting the engine), you can get this error as well. Specifically, you'll get this error if you don't have require "active_record/railtie" in your application.rb, or if it's commented out. That line is what enables the rake railties:install:migrations task, which is defined here. rake railties:install:migrations is, in turn, called by the rake abc_engine:install:migrations task here.
Tl;dr: try adding require "active_record/railtie" to your application.rb if it's not already there.