I use DataMapper (1) as part of a couple of Rack apps and generally find it works beautifully.
For development, I use Rack::Reloader, so that I can just change a source file and not have to bother restarting the Rack app. However, this has a habit of throwing an exception related to DM's associations. Typically I'll get something like this: ArgumentError: +options[:field]+ entry :site_id does not map to a property in Marker /usr/local/Cellar/ruby/2.0.0-p0/lib/ruby/gems/2.0.0/gems/dm-core-1.2.0/lib/dm-core/query.rb:805:in `block in assert_valid_fields' /usr/local/Cellar/ruby/2.0.0-p0/lib/ruby/gems/2.0.0/gems/dm-core-1.2.0/lib/dm-core/query.rb:796:in `each' /usr/local/Cellar/ruby/2.0.0-p0/lib/ruby/gems/2.0.0/gems/dm-core-1.2.0/lib/dm-core/query.rb:796:in `assert_valid_fields' /usr/local/Cellar/ruby/2.0.0-p0/lib/ruby/gems/2.0.0/gems/dm-aggregates-1.2.0/lib/dm-aggregates/query.rb:23:in `assert_valid_fields_with_operator' /usr/local/Cellar/ruby/2.0.0-p0/lib/ruby/gems/2.0.0/gems/dm-core-1.2.0/lib/dm-core/query.rb:768:in `block in assert_valid_options' /usr/local/Cellar/ruby/2.0.0-p0/lib/ruby/gems/2.0.0/gems/dm-core-1.2.0/lib/dm-core/query.rb:766:in `each' /usr/local/Cellar/ruby/2.0.0-p0/lib/ruby/gems/2.0.0/gems/dm-core-1.2.0/lib/dm-core/query.rb:766:in `assert_valid_options' /usr/local/Cellar/ruby/2.0.0-p0/lib/ruby/gems/2.0.0/gems/dm-core-1.2.0/lib/dm-core/query.rb:363:in `update' /usr/local/Cellar/ruby/2.0.0-p0/lib/ruby/gems/2.0.0/gems/dm-core-1.2.0/lib/dm-core/associations/relationship.rb:158:in `block in query_for' /usr/local/Cellar/ruby/2.0.0-p0/lib/ruby/gems/2.0.0/gems/dm-core-1.2.0/lib/dm-core/repository.rb:114:in `scope' /usr/local/Cellar/ruby/2.0.0-p0/lib/ruby/gems/2.0.0/gems/dm-core-1.2.0/lib/dm-core/associations/relationship.rb:153:in `query_for' /usr/local/Cellar/ruby/2.0.0-p0/lib/ruby/gems/2.0.0/gems/dm-core-1.2.0/lib/dm-core/associations/relationship.rb:308:in `eager_load' /usr/local/Cellar/ruby/2.0.0-p0/lib/ruby/gems/2.0.0/gems/dm-core-1.2.0/lib/dm-core/collection.rb:1477:in `delegate_to_relationship' /usr/local/Cellar/ruby/2.0.0-p0/lib/ruby/gems/2.0.0/gems/dm-core-1.2.0/lib/dm-core/collection.rb:1446:in `method_missing' /Users/richard/Code/avanti_kite/model/marker.rb:154:in `bbox_search' The association is this: belongs_to :site, :required => false and it's being called like this in marker.rb/154: user.organisation.sites.markers(filter) but this isn't a one-off - it happens in my other apps too. It always happens on the first refresh after Rack has reloaded the app. It's not fatal - I can always manually restart the app - but it's a PITA. Any thoughts? Richard -- You received this message because you are subscribed to the Google Groups "DataMapper" group. To unsubscribe from this group and stop receiving emails from it, send an email to datamapper+unsubscr...@googlegroups.com. To post to this group, send email to datamapper@googlegroups.com. Visit this group at http://groups.google.com/group/datamapper. For more options, visit https://groups.google.com/d/optout.
