#554 ✓resolved

DM mistakes singular words for plural

Reported by lobo_tuerto | September 7th, 2008 @ 05:36 AM

Same as this: http://wm.lighthouseapp.com/proj...

But fails for the word Address.

Comments and changes to this ticket

  • Greg Campbell

    Greg Campbell September 10th, 2008 @ 07:26 PM

    This appears to be the case for any belongs_to or has_one relationship where the referenced model ends in "s". The bug linked to above was fixed by adding English::Inflect.singular_word "status", "status" to extlib, but I don't think that's scalable to the universe of singular words ending in "s": even user_status, for instance, will continue to fail. I'll dig into the code for a few minutes and attempt to ascertain how difficult this would be to fix.

  • Greg Campbell

    Greg Campbell September 10th, 2008 @ 08:47 PM

    • Tag changed from bug, dm-core, relationships to associations, bug, dm-core, relationships

    After looking at the code, the problem appears to be that the association calls Extlib::Inflection.classify(), which singularizes the name passed in - this causes a problem for any already-singular associations to classes ending in "s". Active Record, in contrast, does the following:

     class_name = name.to_s.camelize
     class_name = class_name.singularize if [ :has_many, :has_and_belongs_to_many ].include?(macro)

    Potential fixes I can think of off the top of my head include:

    • change classify() to take a second optional param (defaulting to false) indicating that the passed-in name is known to be singular already, as in the case of belongs_to and has 1
    • change the associations in question to avoid using classify and do something
    • pluralize the name before passing it in to classify (hack level: elevated)
    • add a bunch of singularization rules to handle these sorts of scenarios, either in English or in Extlib (maybe the universe of singular words ending with "s" is smaller than I expect it to be?)

    I haven't done any real hacking in the DataMapper codebase yet, so I'm not sure which of these is least impactful overall.

  • Greg Campbell

    Greg Campbell September 10th, 2008 @ 08:49 PM

    Apologies for the poor formatting above! Lighthouse really needs a preview button for comments.

  • Dan Kubb (dkubb)

    Dan Kubb (dkubb) January 7th, 2009 @ 04:33 PM

    • State changed from “new” to “accepted”
    • Assigned user changed from “Sam Smoot” to “Dan Kubb (dkubb)”

    I believe this is fixed in dkubb/dm-core. I will check and mark this as resolved if so.

  • Jonathan Stott (namelessjon)

    Jonathan Stott (namelessjon) February 22nd, 2009 @ 08:52 AM

    • Tag changed from associations, bug, dm-core, relationships to associations, bug, dm-core, one_file_test, relationships
    • State changed from “accepted” to “resolved”

    Fixed in 0.10.0 (see attached one file test)

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