The migration state is stored in a table called migration_info, which only has one column, containing the name of all migrations that have run (the number is only used to order to the ones that haven't been run).
I've only ever used the rake task from dm-rails to run the migrations, so maybe look at what that does. https://github.com/datamapper/dm-rails/blob/master/lib/dm-rails/railties/database.rake#L66-69 What adapter are you using? dm-migrations only supports SQLite, Postgres and MySQL, from memory. That said, I don't see where you actually set up datamapper in your example here. Perhaps that is what you're missing? On 04/01/2012, at 7:44 PM, Tom wrote: > Hi All, > > I am having trouble understanding how migrate_up! works, and I suspect > I'm missing something very simple. I have what may be the simplest > migration file... I cut it down to the point where all it does is log: > > -------------------------------------------------------------------- > require 'dm-migrations/migration_runner' > > DataMapper::Logger.new(STDOUT, :debug) > DataMapper.logger.debug( "Starting Migration" ) > > migration 1, :allow_multiple_tabs do > up do > DataMapper.logger.debug( "Migration 1 UP" ) > end > > down do > DataMapper.logger.debug( "Migration 1 DOWN" ) > end > end > > migrate_up! > DataMapper.logger.debug( "Finished Migration" ) > -------------------------------------------------------------------- > > In irb I run this: > require 'rubygems' > require 'data_mapper' > require 'lib/migrations' (the file above) > > And, all I get is this - no sign that it tried to bring up the > migration: > > ~ Starting Migration > ~ Finished Migration > => true > > This is where I'd assume that, like activerecord, the migration > framework has some belief that the migration already ran and is > skipping it, but dm-migrations don't seem to store state anywhere I > can find (or have found documented). > > Any ideas? > > Thanks, > Tom > > -- > You received this message because you are subscribed to the Google Groups > "DataMapper" group. > To post to this group, send email to [email protected]. > To unsubscribe from this group, send email to > [email protected]. > For more options, visit this group at > http://groups.google.com/group/datamapper?hl=en. > -- You received this message because you are subscribed to the Google Groups "DataMapper" group. To post to this group, send email to [email protected]. To unsubscribe from this group, send email to [email protected]. For more options, visit this group at http://groups.google.com/group/datamapper?hl=en.
