Class: OnlineMigrations::BackgroundSchemaMigrations::MigrationRunner

Inherits:
Object
  • Object
show all
Defined in:
lib/online_migrations/background_schema_migrations/migration_runner.rb

Overview

Runs single background schema migration.

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(migration) ⇒ MigrationRunner

Returns a new instance of MigrationRunner.



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# File 'lib/online_migrations/background_schema_migrations/migration_runner.rb', line 9

def initialize(migration)
  @migration = migration
end

Instance Attribute Details

#migration ⇒ Object (readonly)

Returns the value of attribute migration.



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# File 'lib/online_migrations/background_schema_migrations/migration_runner.rb', line 7

def migration
  @migration
end

Instance Method Details

#run ⇒ Object 



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# File 'lib/online_migrations/background_schema_migrations/migration_runner.rb', line 13

def run
  return if migration.cancelled? || migration.succeeded?

  mark_as_running if migration.enqueued? || migration.failed?

  if migration.composite?
    migration.children.each do |child_migration|
      runner = self.class.new(child_migration)
      runner.run
    end
  else
    do_run
  end
end