Module: DataMapper::AutoMigrations

Defined in:
lib/dm-core/auto_migrations.rb

Overview

class AutoMigrator

Instance Method Summary collapse

Instance Method Details

#auto_migrate!(repository_name = self.repository_name) ⇒ Object

Destructively automigrates the data-store to match the model REPEAT: THIS IS DESTRUCTIVE

Parameters:

  • Symbol —

    repository_name the repository to be migrated



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# File 'lib/dm-core/auto_migrations.rb', line 62

def auto_migrate!(repository_name = self.repository_name)
  auto_migrate_down!(repository_name)
  auto_migrate_up!(repository_name)
end

#auto_migrate_down!(repository_name = self.repository_name) ⇒ Object

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future.

Destructively migrates the data-store down, which basically deletes all the models. REPEAT: THIS IS DESTRUCTIVE

Parameters:

  • Symbol —

    repository_name the repository to be migrated



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# File 'lib/dm-core/auto_migrations.rb', line 74

def auto_migrate_down!(repository_name = self.repository_name)
  # repository_name ||= default_repository_name
  if self.superclass != Object
    self.superclass.auto_migrate!(repository_name)
  else
    repository(repository_name) do |r|
      r.adapter.destroy_model_storage(r, self)
    end
  end
end

#auto_migrate_up!(repository_name = self.repository_name) ⇒ Object

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future.

Auto migrates the data-store to match the model

Parameters:

  • Symbol —

    repository_name the repository to be migrated



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# File 'lib/dm-core/auto_migrations.rb', line 90

def auto_migrate_up!(repository_name = self.repository_name)
  if self.superclass != Object
    self.superclass.auto_migrate!(repository_name)
  else
    repository(repository_name) do |r|
      r.adapter.create_model_storage(r, self)
    end
  end
end

#auto_upgrade!(repository_name = self.repository_name) ⇒ Object

Safely migrates the data-store to match the model preserving data already in the data-store

Parameters:

  • Symbol —

    repository_name the repository to be migrated



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# File 'lib/dm-core/auto_migrations.rb', line 105

def auto_upgrade!(repository_name = self.repository_name)
  repository(repository_name) do |r|
    r.adapter.upgrade_model_storage(r, self)
  end
end