#datamapper on 2013-07-17 — irc logs at freenode.irclog.whitequark.org

2013-06-06 16:15 dkubb changed the topic of #datamapper to: Datamapper v1.2.0 | Mailing List: http://is.gd/aa9D | Logs: http://is.gd/qWAL7V | DataMapper 2 Renamed to ROM, see #rom-rb for development

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18:34 <onewheelskyward> In datamapper 1.2, what's a good way determine the finder elements programmatically? For instance, I have an array of arrays ['fieldname', 'eq', 'matchthis'] and I'd like to pass them to all().

18:46 <dkubb> onewheelskyward: I don't know if there's anything built into DM for this. you probably want to validate all the field names match the properties in the model

18:47 <dkubb> onewheelskyward: you could also construct the raw Query object if you wanted

18:47 <onewheelskyward> Will definitely validate the properties

18:47 <onewheelskyward> I just found :conditions.

18:48 <dkubb> onewheelskyward: see https://github.com/datamapper/dm-core/blob/master/lib/dm-core/query/conditions/comparison.rb#L34

18:49 <dkubb> so I would translate the fieldname in the property object, and then construct a comparison object for each

18:49 <onewheelskyward> Oh that's interesting

18:49 <onewheelskyward> Thanks!

18:49 <dkubb> you can then create an AndOperation with them: https://github.com/datamapper/dm-core/blob/master/lib/dm-core/query/conditions/operation.rb#L441

18:50 <dkubb> this might give you a clue how they are used: https://github.com/datamapper/dm-core/blob/master/lib/dm-core/query.rb#L78-L86

18:51 <dkubb> you should be able to pass in the resulting AndOperation object to :conditions, eg: User.all(conditions: and_operation)

18:52 <dkubb> you can construct arbitrarily deep and/or combinations

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18:55 <onewheelskyward> Fantastic!

18:55 <onewheelskyward> Thanks again.

18:55 <dkubb> np

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22:19 <lnormous> If I want to repeat some property definitions in more than one module, is there a good way to do that

22:19 <lnormous> I tried subclassing, and tried doing a require 'some_defs', but neither worked

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22:42 <lnormous> Something like this: http://stackoverflow.com/questions/1829161/ruby-datamapper-table-inheritance-with-associations

22:42 <Cinchy> [URL] Ruby Datamapper table inheritance with associations - Stack Overflow

22:42 <lnormous> except that doesn't seem to work

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