ActiveRecord exists? won't work with keyless tables
Reported by flip | July 13th, 2008 @ 11:46 PM | in 2.x
exists? needs a primary key to work. So it won't work with tables without a primary key.
- File activerecord/lib/active_record/base.rb, line 601
601: def exists?(id_or_conditions)
602: connection.select_all(
603: construct_finder_sql(
604: :select => "#{quoted_table_name}.#{primary_key}",
605: :conditions => expand_id_conditions(id_or_conditions),
606: :limit => 1
607: ),
608: "#{name} Exists"
609: ).size > 0
610: end
Comments and changes to this ticket
-
Tom Ward July 26th, 2008 @ 10:55 AM
Can you provide a failing test case? The solution is pretty simple (select 1 rather than select primary_key), but in what circumstance would you actually have an ActiveRecord class without a primary key?
-
Pratik July 26th, 2008 @ 03:06 PM
- → State changed from “new” to “wontfix”
I wonder what actually works when you don't have a PK. In any case, you should just write a plugin overriding exists?
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