Rails 租户模式切换与后台作业不工作答案

【问题标题】：Rails Tenant schema switching with background jobs not workingRails 租户模式切换与后台作业不工作
【发布时间】：2017-12-13 13:57:35
【问题描述】：

使用 Each gem 设置计划的 rake 任务。需要切换到特定架构（在我的项目中使用 Apartment gem）

config/schedule.rb 中的代码

env :PATH, ENV['PATH']
env :GEM_PATH, ENV['GEM_PATH']
set :output, "#{Whenever.path}/log/scheduler.log"
every 1.minute do
  rake "db:my_task"
end

lib/tasks/my_task.rake 中的代码

namespace :db do
  task :my_task => :environment do
    Apartment::Tenant.switch("subdomain") do
       #My Code here
    end
  end
end

在日志 log/scheduler.logs 中产生以下错误

  rake aborted!
  Apartment::TenantNotFound: One of the following schema(s) is invalid: "subdomain" "public"
/var/lib/gems/2.3.0/gems/apartment-1.2.0/lib/apartment/adapters/postgresql_adapter.rb:72:in `rescue in connect_to_new'
/var/lib/gems/2.3.0/gems/apartment-1.2.0/lib/apartment/adapters/postgresql_adapter.rb:65:in `connect_to_new'
/var/lib/gems/2.3.0/gems/apartment-1.2.0/lib/apartment/adapters/abstract_adapter.rb:91:in `block in switch!'
/var/lib/gems/2.3.0/gems/activesupport-5.1.3/lib/active_support/callbacks.rb:97:in `run_callbacks'
/var/lib/gems/2.3.0/gems/apartment-1.2.0/lib/apartment/adapters/abstract_adapter.rb:88:in `switch!'
/var/lib/gems/2.3.0/gems/apartment-1.2.0/lib/apartment/adapters/abstract_adapter.rb:105:in `switch'
/home/user1/Desktop/SPERICORN/kidversity/lib/tasks/dynamic_age_setter.rake:4:in `block (2 levels) in <top (required)>'
/var/lib/gems/2.3.0/gems/rake-12.0.0/exe/rake:27:in `<top (required)>'
ActiveRecord::StatementInvalid: Could not find schema kochi
/var/lib/gems/2.3.0/gems/apartment-1.2.0/lib/apartment/adapters/postgresql_adapter.rb:66:in `connect_to_new'
/var/lib/gems/2.3.0/gems/apartment-1.2.0/lib/apartment/adapters/abstract_adapter.rb:91:in `block in switch!'
/var/lib/gems/2.3.0/gems/activesupport-5.1.3/lib/active_support/callbacks.rb:97:in `run_callbacks'
/var/lib/gems/2.3.0/gems/apartment-1.2.0/lib/apartment/adapters/abstract_adapter.rb:88:in `switch!'
/var/lib/gems/2.3.0/gems/apartment-1.2.0/lib/apartment/adapters/abstract_adapter.rb:105:in `switch'
/home/user1/Desktop/SPERICORN/kidversity/lib/tasks/dynamic_age_setter.rake:4:in `block (2 levels) in <top (required)>'
/var/lib/gems/2.3.0/gems/rake-12.0.0/exe/rake:27:in `<top (required)>'
Tasks: TOP => db:dynamic_age_setter
(See full trace by running task with --trace)

【问题讨论】：

标签： ruby-on-rails ruby rails-postgresql

【解决方案1】：

你缺少 ActiveRecord::Base.establish_connection.connection 试试这个下面的示例代码：

namespace :debtor_email_data_fix do

desc '更新数据'

任务 email_normalize_to_downcase: :environment do create_connection_with_db Apartment::Tenant.switch!('app')

Email.find_each do |t|
  t.update(address: t.address.downcase)
end

结束

任务全部：[:email_normalize_to_downcase] 做结束

私人

def create_connection_with_db ActiveRecord::Base.establish_connection.connection 结尾结束

【讨论】：