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Class: ActiveRecord::Migration::CheckPending

Relationships & Source Files
Inherits: Object
Defined in: activerecord/lib/active_record/migration.rb

Overview

This class is used to verify that all migrations have been run before loading a web page if config.active_record.migration_error is set to :page_load.

Class Method Summary

Instance Method Summary

Constructor Details

.new(app, file_watcher: ActiveSupport::FileUpdateChecker) ⇒ CheckPending

[ GitHub ] 

  


# File 'activerecord/lib/active_record/migration.rb', line 649



def initialize(app, file_watcher: ActiveSupport::FileUpdateChecker)
  @app = app
  @needs_check = true
  @mutex = Mutex.new
  @file_watcher = file_watcher
end


  







Instance Method Details



  

    #build_watcher(&block)   (private)
  

  [ GitHub ]


  

  


# File 'activerecord/lib/active_record/migration.rb', line 675



def build_watcher(&block)
  current_environment = ActiveRecord::ConnectionHandling::DEFAULT_ENV.call
  all_configs = ActiveRecord::Base.configurations.configs_for(env_name: current_environment)
  paths = all_configs.flat_map { |config| config.migrations_paths || Migrator.migrations_paths }.uniq
  @file_watcher.new([], paths.index_with(["rb"]), &block)
end


  








  

    #call(env)  
  

  [ GitHub ]


  

  


# File 'activerecord/lib/active_record/migration.rb', line 656



def call(env)
  @mutex.synchronize do
    @watcher ||= build_watcher do
      @needs_check = true
      ActiveRecord::Migration.check_pending_migrations
      @needs_check = false
    end

    if @needs_check
      @watcher.execute
    else
      @watcher.execute_if_updated
    end
  end

  @app.call(env)
end