Hi all,
Windows XP Oracle 10g client OCI8 0.1.16 Ruby 1.8.5 Rails 1.1.6
I'm hitting weird behavior with the Oracle adapter and a find_by_sql call on a multi-table join.
The SQL looks like this:
SELECT DISTINCT e1.ip_address, loc.street, loc.city, loc.state FROM schema.net_element ne, schema.equipment e1, schema.equipment e2, schema.building b, schema.cust_loc cl, schema.location loc WHERE e2.equipment_id = e1.equipment_id AND e2.some_column like 'SOME_VAL%' AND e1.equipment_id = ne.net_element_id AND ne.class_name = 'FooBar' AND e1.building_id = b.building_id AND b.main_address = cl.cust_loc_id AND cl.location_id = loc.location_id
So, I setup a class for the 'Location' table like this:
class OracleLocation < ActiveRecord::Base establish_connection( :adapter => "oracle", :database => "our_db", :username => "user", :password => "password" )
set_table_name :location set_primary_key "location_id" end
I can get a record back just fine:
loc = OracleLocation.find_by_sql(sql).first p loc
#<OracleLocation:0x385c610 @attributes={"state"=>"WA", "street"=>"1234 Block St", "city"=>"Smallville", "ip_address"=>"172.1.2.3"}>
However, if I try to refer to an attribute, either directly or via the 'attributes' method, I get an error:
p loc.attributes # Boom!
(eval):3:in `__send__': ORA-04043: object location does not exist (OCIError) from (eval):3:in `describe' from c:/ruby/lib/ruby/gems/1.8/gems/activerecord-1.14.4/lib/active_record/connection_adapters/oracle_adapter.rb: 361:in `columns' from c:/ruby/lib/ruby/gems/1.8/gems/activerecord-1.14.4/lib/active_record/base.rb:696:in `columns' from c:/ruby/lib/ruby/gems/1.8/gems/activerecord-1.14.4/lib/active_record/base.rb:704:in `columns_hash' from c:/ruby/lib/ruby/gems/1.8/gems/activerecord-1.14.4/lib/active_record/base.rb:1562:in `column_for_attribute'
from c:/ruby/lib/ruby/gems/1.8/gems/activerecord-1.14.4/lib/active_record/base.rb:1801:in `read_attribute' from c:/ruby/lib/ruby/gems/1.8/gems/activerecord-1.14.4/lib/active_record/base.rb:2067:in `send' from c:/ruby/lib/ruby/gems/1.8/gems/activerecord-1.14.4/lib/active_record/base.rb:2067:in `clone_attribute_value ' from c:/ruby/lib/ruby/gems/1.8/gems/activerecord-1.14.4/lib/active_record/base.rb:2061:in `clone_attributes' from c:/ruby/lib/ruby/gems/1.8/gems/activesupport-1.3.1/lib/active_support/inflector.rb:161:in `inject' from c:/ruby/lib/ruby/gems/1.8/gems/activerecord-1.14.4/lib/active_record/base.rb:2060:in `each' from c:/ruby/lib/ruby/gems/1.8/gems/activerecord-1.14.4/lib/active_record/base.rb:2060:in `inject' from c:/ruby/lib/ruby/gems/1.8/gems/activerecord-1.14.4/lib/active_record/base.rb:2060:in `clone_attributes' from c:/ruby/lib/ruby/gems/1.8/gems/activerecord-1.14.4/lib/active_record/base.rb:1519:in `attributes' from oracletest2.rb:35:in `send' from oracletest2.rb:35
This error confuses me. There clearly *is* a location table, or the query wouldn't work in the first place. Also, the fact that I'm getting back an ORA-04043 indicates to me that, when I call loc.attributes, it's calling out to the database *again* for some reason. Why?
Is this error caused by the fact that I'm doing a multi-table join here, but haven't actually mapped any of the other tables besides Location? What's going on?
Thanks,
Dan
