Rake task performs ActiveRecord model operations. I added ActiveRecord::Base in the rake task and that works locally, but not on Heroku resulting in this error:
uninitialized constant BookingObserver
on the line with ActiveRecord::Base. If I do not include that line then I cannot use the model at all (resulting in similar error just for the model not the observer).
Your rake task will need to load the Rails environment before executing ActiveRecord code.
# lib/tasks/my_tasks.rake
task :my_task => :environment do
# Your task here
# it has access to the Rails environment now
end
Also see this similar issue and the Railscast on custom rake tasks.
I was using config.threadsafe! which disables dependency loading (thus not loading the observer, just the model). The solution was to add config.dependency_loading = true if $rails_rake_task to the environment.
I was able to fix this issue by commenting out config.threadsafe! in production.rb.
I added this code in the application.rb
config.autoload_paths += Dir[ Rails.root.join('app', 'models', '**/') ]
just before calling:
config.active_record.observers = [:user_observer]
i think because my application, it doesnt automatically discovers the directory of my observers which is under models/observers/
Related
I got a rake task which invokes other rake tasks, so my development data can be easily reset.
the first rake task (lib/tasks/populate.rake)
# Rake task to populate development database with test data
# Run it with "rake db:populate"
namespace :db do
desc 'Erase and fill database'
task populate: :environment do
...
Rake::Task['test_data:create_company_plans'].invoke
Rake::Task['test_data:create_companies'].invoke
Rake::Task['test_data:create_users'].invoke
...
end
end
the second rake task (lib/tasks/populate_sub_scripts/create_company_plans.rake)
namespace :test_data do
desc 'Create Company Plans'
task create_company_plans: :environment do
Company::ProfilePlan.create!(name: 'Basic', trial_period_days: 30, price_monthly_cents: 4000)
Company::ProfilePlan.create!(name: 'Professional', trial_period_days: 30, price_monthly_cents: 27_500)
Company::ProfilePlan.create!(name: 'Enterprise', trial_period_days: 30, price_monthly_cents: 78_500)
end
end
when I run bin/rake db:populate then i get this error
rake aborted! LoadError: Unable to autoload constant
Company::ProfilePlan, expected
/home/.../app/models/company/profile_plan.rb to define it
but when I run the second rake task independently it works well.
The model (path: /home/.../app/models/company/profile_plan.rb)
class Company::ProfilePlan < ActiveRecord::Base
# == Constants ============================================================
# == Attributes ===========================================================
# == Extensions ===========================================================
monetize :price_monthly_cents
# == Relationships ========================================================
has_many :profile_subscriptions
# == Validations ==========================================================
# == Scopes ===============================================================
# == Callbacks ============================================================
# == Class Methods ========================================================
# == Instance Methods =====================================================
end
Rails 5.0.1
Ruby 2.4.0
The App was just upgraded from 4.2 to 5
It works when I require the whole path:
require "#{Rails.root}/app/models/company/profile_plan.rb"
But this seems strange to me, because in the error message rails has the correct path to the Model. Does someone know why I have to require the file when invoked from another rake task?
Thank you very much
Well, it seems that rake doesn't eager load, so when you call the create_company_plans.rake alone it loads the referred objects, however when you invoke it from another rake, it doesn't know you will need them and so they are not loaded.
You can take a look at this other QA which was similar to yours.
I think maybe you don't need to require the whole path, just:
require 'models/company/profile_plan'
From what I understand, you can probably overcome the problem by reenable ing and then revoke ing the task as given below. Pardon me if this doesn't work.
['test_data:create_company_plans', 'test_data:create_companies'].each do |task|
Rake::Task[task].reenable
Rake::Task[task].invoke
end
There is more info on this stackoverflow question how-to-run-rake-tasks-from-within-rake-tasks .
In Rails 3.2.16 execution of this rake task breaks with uninitialized constant error, complaining that the Model class MyModel is not known.
desc "some rake task"
task :do_it => :environment do
# do something depending on a model:
MyModel.each do |m|
# do something with model
end
# ...
end
Looks like the root-cause of this is that I had config.threadsafe! enabled in the config files.
To fix this, do this:
# only enable threadsafe! mode if we are not running rake tasks
config.threadsafe! unless File.split($0).last == 'rake' # unless it's a rake task
I wanted to preload the configuration (from ".yml" files). In one of my initializer files (config/initializers/facebook.rb) I have following line of code:
FACEBOOK_CONFIG = YAML.load_file("#{Rails.root}/config/facebook.yml")[Rails.env]
So, it works like a charm in the "DEVELOPMENT" mode. Once I switch to the production mode, it keeps telling me, that FACEBOOK_CONFIG is an uninitialized constant for my "facebook.js.coffee.erb" file, located in assets/javascript (If it matters), if I want to o "rake assets:precompile". I've tried doing random stuff, like: RAILS_ENV=production bundle exec rake assets:precompile or
rake assets:precompile:all
, but no luck
I have tried assigning "initialize_on_precompile = true" variable for my production environment (although, it should be true by default), just in case.
Why it doesn't work in production mode (But, I want to emphasise, that it does work(!) in the development environment).
Can someone help with that one ?
I encountered exactly the same problem. This is because your javascript(coffescript) file makes reference to a constant that is defined in an initializer. Because it is precompiled before the initializer the app throws an error.
This is the simple solution I found. You place this code at the bottom of your application.rb file in config:
module AssetsInitializers
class Railtie < Rails::Railtie
initializer "assets_initializers.initialize_rails",
:group => :assets do |app|
require "#{Rails.root}/config/initializers/facebook.rb"
end
end
end
It manually loads up certain files from the initializer folder. It solved my problem.
Hopefully this was the issue for you as well.
module Rails
class << self
def facebook_config
##facebook_config ||= nil
end
def facebook_config=(facebook_config)
##facebook_config = facebook_config
end
end
end
Rails.facebook_config = YAML.load_file("#{Rails.root}/config/facebook.yml")[Rails.env]
# And you can use it like this in anywhere:
puts Rails.facebook_config
I am using resque in my application for delayed jobs, where i cant send emails & sms to bulk number of users asynchronously. And the data is stored in mongodb, mongoid is the ODM connects rails & mongo.
My mongoid model looks like this
class Item
include Mongoid::Document
include Geo::LocationHelper
field :name, :type => String
field :desc, :type => String
#resque queue name
#queue = :item_notification
#resque perform method
def self.perform(item_id)
#item = Item.find(item_id)
end
end
I can able to add jobs to resque, i have verified using resque-web. Whenever i start an resque-worker
QUEUE=item_notification rake resque:work
i got the uninitialized constant Item , since i am using resque as rails gem and starting rake in rails root, i believe my mongoid models should be loaded.
After digging lot, i found that we can explicitly ask rake to load the environment by
QUEUE=item_notification rake environment resque:work
but now also i got the same error uninitialized constant Item
can someone help me out?
and my
Actually, its a problem in dev environment. after adding this line to into resque.rake task file
# load the Rails app all the time
namespace :resque do
puts "Loading Rails environment for Resque"
task :setup => :environment
ActiveRecord::Base.send(:descendants).each { |klass| klass.columns }
end
it works fine
The code taken from GitHub-Resque-Wiki
During some recent refactoring we changed how our user avatars are stored not realizing that once deployed it would affect all the existing users. So now I'm trying to write a rake task to fix this by doing something like this.
namespace :fix do
desc "Create associated ImageAttachment using data in the Users photo fields"
task :user_avatars => :environment do
class User
# Paperclip
has_attached_file :photo ... <paperclip stuff, styles etc>
end
User.all.each do |user|
i = ImageAttachment.new
i.photo_url = user.photo.url
user.image_attachments << i
end
end
end
When I try running that though I'm getting undefined method `has_attached_file' for User:Class
I'm able to do this in script/console but it seems like it can't find the paperclip plugin's methods from a rake task.
the rake task is probably not be loading the full Rails environment. You can force it to do so by doing something like this:
require File.expand_path(File.dirname(__FILE__) + "/../config/environment")
where the path leads to your environment.rb file. If this were to fix the issue, you should include it inside this task specifically, because you probably do not want all your rake tasks to include the environment by default. In fact, a rake task may not even be the best place to do what you're trying to do. You could try creating a script in the script directory as well.