info@faircopy.com
2006-May-23 21:53 UTC
[Rails] does has_many: add a has_<associated_class>? method
Hi, I have a Country class which has_many: regions. At the same time, the corresponding countries table has a boolean column named has_regions. It happens that when I try to access that attribute using country_instance.has_regions? , I can see in the logs that Rails is querying the database with a SELECT that''s counting the regions in that country. Obviously, that''s not what I want, as I already have the required info in the has_regions column, so there''s no need to make a database query. Is this "synthetic" method documented in the Rails docs? I can''t find it in the has_many documentation... http://api.rubyonrails.org/classes/ActiveRecord/Associations/ ClassMethods.html#M000530 How can I avoid that query? Is there any way apart from changing the name of the has_regions column? Thanks in advance, xavi
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