The problem of the first solution is that "find_in_coverage | find_known_missing" combined that way does not return a scope. It returns two arrays each and applies | operator on the result. See: http://www.ruby-doc.org/core-1.9.3/Array.html#method-i-7C
I've looked arel docs (in fact, I just found poor docs). Can you please point me where in docs is explaining how I can construct such query? Thanks for you attention, Gustavo On Fri, May 18, 2012 at 3:52 PM, azizmb.in <m...@azizmb.in> wrote: > To add to that, if you want to construct complex queries, you should have > a look at arel <https://github.com/rails/arel>. > > > On Sat, May 19, 2012 at 12:17 AM, azizmb.in <m...@azizmb.in> wrote: > >> AFAIK, something like this should work: >> >> def find_visibles >> find_in_coverage | find_known_missing >> end >> >> >> On Fri, May 18, 2012 at 10:53 PM, Gustavo de Sá Carvalho Honorato < >> gustavohonor...@gmail.com> wrote: >> >>> Hi all! >>> >>> I've googled all over and I couldn't find anything about chaining scopes >>> with OR instead of the default AND. >>> >>> I have an Asset model with the following scopes: >>> >>> class Asset < ActiveRecord::Base >>> >>> (...) >>> >>> scope :find_in_coverage, lambda { where('timestamp(assets.found_at) >= >>> ?', Asset.found_at_limit) } >>> scope :find_unknown_in_coverage, where('assets.asset_type_id IS >>> NULL').find_in_coverage >>> scope :find_known_missing, lambda { where('assets.found_at < ? AND >>> assets.asset_type_id IS NOT NULL', Asset.found_at_limit) } >>> >>> end >>> >>> I would like to create another scope ("find_visibles") which is the OR >>> of "find_in_coverage" and "find_known_missing" scopes, like that: >>> >>> scope :find_visibles, find_in_coverage.find_know_missing >>> >>> The problem is that this method chain uses AND to concatenate WHERE >>> clauses. I need this clauses to be concatenated using OR instead. >>> >>> How can I do that? >>> >>> Thanks in advance, >>> Gustavo Honorato >>> >>> -- >>> You received this message because you are subscribed to the Google >>> Groups "Ruby on Rails: Talk" group. >>> To post to this group, send email to rubyonrails-talk@googlegroups.com. >>> To unsubscribe from this group, send email to >>> rubyonrails-talk+unsubscr...@googlegroups.com. >>> For more options, visit this group at >>> http://groups.google.com/group/rubyonrails-talk?hl=en. >>> >> >> >> >> -- >> - Aziz M. Bookwala >> >> Website <http://azizmb.in/> | Twitter <https://twitter.com/azizbookwala> >> | Github <http://github.com/azizmb> >> >> > > > -- > - Aziz M. Bookwala > > Website <http://azizmb.in/> | Twitter <https://twitter.com/azizbookwala> > | Github <http://github.com/azizmb> > > -- > You received this message because you are subscribed to the Google Groups > "Ruby on Rails: Talk" group. > To post to this group, send email to rubyonrails-talk@googlegroups.com. > To unsubscribe from this group, send email to > rubyonrails-talk+unsubscr...@googlegroups.com. > For more options, visit this group at > http://groups.google.com/group/rubyonrails-talk?hl=en. > -- You received this message because you are subscribed to the Google Groups "Ruby on Rails: Talk" group. To post to this group, send email to rubyonrails-talk@googlegroups.com. To unsubscribe from this group, send email to rubyonrails-talk+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/rubyonrails-talk?hl=en.
