ActiveRecord :: StatementInvalid：PG :: UndefinedTable：错误：关系

Question

I'm having some trouble with whenever. I created a rake task which work perfectly when I launch it myself:

namespace :check do
    desc "check all services"
    task :all do
       Rake::Task["fb_ping:check"].invoke
       Rake::Task["lithium_ping:check"].invoke
       Rake::Task["algolia_ping:check"].invoke
     end
end

but when it goes through whenever:

set :output, {:error => "log/cron_error_log.log", :standard => "log/cron_log.log"}
every 2.minutes do
  rake 'check:all'
end

I get the following return in my log:

    rake aborted!
ActiveRecord::StatementInvalid: PG::UndefinedTable: ERROR:  relation "services" does not exist
LINE 1: SELECT "services".* FROM "services"
                                 ^
: SELECT "services".* FROM "services"
/Users/Naekh/.rvm/gems/ruby-2.4.1/gems/activerecord-5.0.6/lib/active_record/connection_adapters/postgresql_adapter.rb:598:in `async_exec'
/Users/Naekh/.rvm/gems/ruby-2.4.1/gems/activerecord-5.0.6/lib/active_record/connection_adapters/postgresql_adapter.rb:598:in `block in exec_no_cache'
/Users/Naekh/.rvm/gems/ruby-2.4.1/gems/activerecord-5.0.6/lib/active_record/connection_adapters/abstract_adapter.rb:590:in `block in log'
/Users/Naekh/.rvm/gems/ruby-2.4.1/gems/activesupport-5.0.6/lib/active_support/notifications/instrumenter.rb:21:in `instrument'
/Users/Naekh/.rvm/gems/ruby-2.4.1/gems/activerecord-5.0.6/lib/active_record/connection_adapters/abstract_adapter.rb:583:in `log'
/Users/Naekh/.rvm/gems/ruby-2.4.1/gems/activerecord-5.0.6/lib/active_record/connection_adapters/postgresql_adapter.rb:598:in `exec_no_cache'
/Users/Naekh/.rvm/gems/ruby-2.4.1/gems/activerecord-5.0.6/lib/active_record/connection_adapters/postgresql_adapter.rb:585:in `execute_and_clear'
/Users/Naekh/.rvm/gems/ruby-2.4.1/gems/activerecord-5.0.6/lib/active_record/connection_adapters/postgresql/database_statements.rb:103:in `exec_query'
/Users/Naekh/.rvm/gems/ruby-2.4.1/gems/activerecord-5.0.6/lib/active_record/connection_adapters/abstract/database_statements.rb:377:in `select_prepared'
/Users/Naekh/.rvm/gems/ruby-2.4.1/gems/activerecord-5.0.6/lib/active_record/connection_adapters/abstract/database_statements.rb:39:in `select_all'
/Users/Naekh/.rvm/gems/ruby-2.4.1/gems/activerecord-5.0.6/lib/active_record/connection_adapters/abstract/query_cache.rb:95:in `select_all'
/Users/Naekh/.rvm/gems/ruby-2.4.1/gems/activerecord-5.0.6/lib/active_record/querying.rb:39:in `find_by_sql'
/Users/Naekh/.rvm/gems/ruby-2.4.1/gems/activerecord-5.0.6/lib/active_record/relation.rb:706:in `exec_queries'
/Users/Naekh/.rvm/gems/ruby-2.4.1/gems/activerecord-5.0.6/lib/active_record/relation.rb:583:in `load'
/Users/Naekh/.rvm/gems/ruby-2.4.1/gems/activerecord-5.0.6/lib/active_record/relation.rb:260:in `records'
/Users/Naekh/.rvm/gems/ruby-2.4.1/gems/activerecord-5.0.6/lib/active_record/relation/delegation.rb:38:in `each'
/Users/Naekh/code/yoando/statuschecker/statuschecker/lib/tasks/fb_ping.rake:5:in `block (2 levels) in <top (required)>'
/Users/Naekh/code/yoando/statuschecker/statuschecker/lib/tasks/rake_them_all.rake:4:in `block (2 levels) in <top (required)>'
/Users/Naekh/.rvm/gems/ruby-2.4.1/gems/rake-12.1.0/exe/rake:27:in `<top (required)>'
/Users/Naekh/.rvm/gems/ruby-2.4.1/bin/ruby_executable_hooks:15:in `eval'
/Users/Naekh/.rvm/gems/ruby-2.4.1/bin/ruby_executable_hooks:15:in `<main>'

I don't get how something that works independently can crash when called by whenever

// Here is my schema:

ActiveRecord::Schema.define(version: 20170922073721) do

  enable_extension "plpgsql"

  create_table "pings", force: :cascade do |t|
    t.boolean  "up"
    t.integer  "service_id"
    t.datetime "created_at", null: false
    t.datetime "updated_at", null: false
    t.index ["service_id"], name: "index_pings_on_service_id", using: :btree
  end

  create_table "services", force: :cascade do |t|
    t.string   "name"
    t.string   "web_api"
    t.string   "json_path"
    t.datetime "created_at", null: false
    t.datetime "updated_at", null: false
  end

  add_foreign_key "pings", "services"
end

here is a ping check (fb_ping.rake), I used the same syntax in my other test. All of them work when I launch it manually :

namespace :fb_ping do
desc "New fb ping"
task check: :environment do

  Service.all.each do | s |
    if s.name == 'Facebook'
      if FacebookStatusService.status === 1
        Ping.create(up: true, service: s)
        puts  'FB service is up'
      else
        Ping.create(up: false, service: s)
        puts  'FB service is down'
      end
    end
  end
end

end

Answer 1

If a :path is not set it will default to the directory in which whenever was executed. :environment_variable will default to 'RAILS_ENV'. :environment will default to 'production'. https://github.com/javan/whenever

To adjust for the environment dynamically, you will need to pass variables on the fly. https://github.com/javan/whenever/wiki/Setting-variables-on-the-fly

As a first test, try to hardcode your current environment, I'm assuming development in the example below:

set :output, {:error => "log/cron_error_log.log", :standard => "log/cron_log.log"}
every 2.minutes do
  rake 'check:all', :environment => 'development'
end