what's up?
My friend created a rake task to update our data in the database (because we have db changes). Following is the task:
namespace :db do
task :update_database => :environment do
puts "Update do banco"
posts = Post.where("source_id is null").order("id")
done = Array.new
posts.each do |post|
if post.source_id.nil? and !done.include?(post)
posts2 = Post.where("content LIKE ? AND id != ?", post.content, post.id)
done.concat(posts2)
posts2.each do |post2|
post2.source_id = post.id
post2.save
end
end
end
end
end
I already executed this rake task in my localhost, but I deploy my project to heroku and now my project won't open online. I don't remember what's the command to execute rake tasks and I can't find it in no place.
My questions is:
What's the command to execute rake tasks?
What's the command to execute rake tasks on heroku? Just "heroku run "?
Thanks!
heroku run bundle exec rake db:update_database
should do.
bundle exec ensures that the script is run in the context of current bundle.
Related
I want to use Heroku's scheduler to reset my database once every day.
It's recommended to use rake tasks for the scheduler. This is what I've tried:
task :reset_database => :environment do
`heroku pg:reset MY_DB:URL`
`heroku run rake db:migrate db:seed`
# some other ruby commands
end
But how would I do this correctly, because putting the heroku commands within backticks, which with bash normally works, doesn't work here:
No such file or directory - heroku
Try this rake task:
namespace :reset_database do
desc "Destroy all table entries."
task :all => :environment do
ActiveRecord::Base.connection.tables.each do |table|
if table != 'schema_migrations'
table.singularize.camelize.constantize.destroy_all
end
# Use this if you want to use the normal seeds:
# Rails.application.load_seed
# Use this if you want to run another rake task:
Rake::Task["foo:bar"].invoke
end
end
end
I'm trying to user rake and rufus, both of which I am new to. I want to have Rufus call my rake task but I am getting the following error. Don't know how to build task 'inbox:process_inbox'
lib/tasks/inbox_tasks.rb
namespace :inbox do
task :process_inbox do
logger = Logger.new(Rails.root.to_s + "/log/scheduler.log")
logger.info "Rufus Here!"
end
end
rufus_scheduler.rb
require 'rufus-scheduler'
require 'rake'
scheduler = Rufus::Scheduler.new
scheduler.every '10s', :first_at => Time.now + 3 do
Rake::Task["inbox:process_inbox"]
end
As #jmettraux (the creator of rufus-scheduler!) has already answered, the problem is that the rake task is defined in a .rb file instead of .rake file.
Adding some more details to help in the future.
While creating a new rake task, you could get the rails generator to automatically create the file with appropriate structure.
Example: Running
> rails g task inbox process_inbox
create lib/tasks/inbox.rake
will create a file named lib/tasks/inbox.rake with content:
namespace :inbox do
desc "TODO"
task process_inbox: :environment do
end
end
Having a DESC in the task definition is important; that allows for verifying that the rake task is defined and available, by running either rake -T inbox or rake -T | grep inbox
> rake -T inbox
rake inbox:process_inbox # TODO
Could this one help?
How to build task 'db:populate' (renaming inbox_tasks.rb to inbox_tasks.rake)
(did a simple https://www.google.com/?#q=rails+don%27t+know+how+to+build+task ...)
I have a problem when I do:
namespace :xaaron do
task :get_roles do
roles = Xaaron::Role.all
puts roles
end
task :get_role, [:name] do |t, args|
role = Xaaron::Role.find(args[:name].parameterize)
puts role
end
end
The first task will work fine. I can even add binding.pry and run Xaaron::Role and get information about Roles back. But the second task fails with:
NameError: uninitialized constant Xaaron::Role
I run each task in my main app because these tasks are inside an engine, using:
bin/rake xaaron:get_roles` and `bin/rake xaaron:get_role
I can run bin/rails c in the main application that uses the engine and run Xaaron::Role and get information about Roles table.
Why is the second one failing but the first one is not? Is there scoping with arguments?
I'm not sure why either works, but if this is Rails and those are Rails models, your tasks should depend on the environment:
task :get_roles => [ :environment ] do
By depending on the :environment task, it first loads Rails.
Also see: What's the 'environment' task in Rake?.
You can also run a Rake task as
bundle exec rake environment xaaron:get_role
This will load the Rails environment first.
I kept getting uninitialized constant errors for a Rake task, even after depending on :environment and running with bundle exec.
The issue was that I was making a Rake::TestTask and, even though the Rake task had access to all constants, the test files themselves did not have access to constants.
The solution was to add this line to the top of my test file:
require_relative '../config/environment'
This is the Rake task:
require "rake/testtask"
Rake::TestTask.new(:test) do |t|
t.libs << "test"
t.libs << "lib"
t.test_files = FileList["test/**/test_*.rb"]
end
To add, as of Ruby 1.9 and above, you can use this hash syntax:
namespace :xaaron do
desc "Rake task to get roles"
task get_roles: :environment do
roles = Xaaron::Role.all
puts roles
end
#####
end
And then you can run the command below to run the Rake task:
rake xaaron:get_roles
or
bundle exec rake xaaron:get_roles
I have seen the other posts but I am still having trouble. Below is my code. I have several rake tasks where I pass in zero, one or even five arguments. What am I missing?
namespace :my_namespace do
desc 'shows user accounts within the database for the specified customer.'
task :show_user_accounts, [:customer_id] => :environment do |t, args|
cust = Customer.find( args.customer_id.to_i )
cust.users.each do |user|
puts "User Name: #{user.name}\tUser ID: #{user.id}\t"
end
end
end
I am running the task with the following command:
$ rake my_namespace:show_user_accounts customer_id=110
Error:
rake aborted!
Couldn't find Customer with id=0
After much searching around I found that not only did the syntax for a rake task change, but the execution syntax did as well. So, the code of my rake task (above) is correct but my invocation was wrong.
The correct way for running above rake task is:
$ rake my_namespace:show_user_accounts[110]
I found the answer here: http://www.redconfetti.com/2012/01/example-rake-task/
To prepare database for my Ruby on Rails 3 application I need to run the following steps in the Terminal:
rake db:create
rake db:migrate
rake db:seed
Is it possible to do all those steps in one? Maybe it is possible running a 'rake' command that will "fire" another 'rake' command... but how?!
You can define your own rake tasks which call other tasks as prerequisites:
# lib/tasks/my_tasks.rake
namespace :db do
desc "create, migrate and seed"
task :do_all => [:create,:migrate,:seed] do
end
end
Normally the body of the task would contain Ruby code to do something, but in this case we are just invoking the three prerequisite tasks in turn (db:create,db:migrate,db:seed).
The empty do-end blocks are not needed, e.g. (for zetetic's answer)
$ cat lib/tasks/my_tasks.rake
# lib/tasks/my_tasks.rake
namespace :db do
desc "create, migrate and seed"
task :do_all => [:create,:migrate,:seed]
end
rake db:create db:migrate db:seed will do all that.
zeteitic got it right, but in the event you don't want to namespace this task under "db", you'd want something more like this:
desc "Bootstrap database."
task :bootstrap => ["db:create", "db:migrate", "db:seed"] do; end
And on the command line:
rake bootstrap
# => create, migrate and seed db