Module: DbCharmer::MultiDbMigrations

Defined in:
lib/db_charmer/multi_db_migrations.rb

Constant Summary collapse

@@multi_db_name = 
nil

Instance Method Summary collapse

Instance Method Details

#db_magic(opts = {}) ⇒ Object

Raises:

  • (ArgumentError) 


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# File 'lib/db_charmer/multi_db_migrations.rb', line 21

def db_magic(opts = {})
  raise ArgumentError, "No connection name - no magic!" unless opts[:connection]
  @@multi_db_name = opts[:connection]
  class << self
    alias_method_chain :migrate, :db_wrapper
  end
end

#migrate_with_db_wrapper(direction) ⇒ Object 



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# File 'lib/db_charmer/multi_db_migrations.rb', line 5

def migrate_with_db_wrapper(direction)
  on_db(@@multi_db_name) { migrate_without_db_wrapper(direction) }
end

#on_db(db_name) ⇒ Object 



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# File 'lib/db_charmer/multi_db_migrations.rb', line 9

def on_db(db_name)
  announce "Switching connection to #{db_name}"
  old_proxy = ActiveRecord::Base.db_charmer_connection_proxy
  ActiveRecord::Base.switch_connection_to(db_name, DbCharmer.migration_connections_should_exist?)
  yield
ensure
  announce "Checking all database connections"
  ActiveRecord::Base.verify_active_connections!
  announce "Switching connection back to default"
  ActiveRecord::Base.switch_connection_to(old_proxy)
end