ruby-oci8: ORA-12514: TNS:listener does not currently know of service requested in connect descriptor - ruby

Question

I tried to connect to Oracle DB with the latest oracle_enhanced, ruby-oci8 gems on a Windows 7 x64 PC and it failed as follows:
$ ruby oracle_db_connection.rb
oci8.c:654:in oci8lib_230.so: ORA-12514: TNS:listener does not currently know of service requested in connect descriptor (OCIError)
from C:/Ruby23-x64/lib/ruby/gems/2.3.0/gems/ruby-oci8-2.2.2-x64-mingw32/lib/oci8/oci8.rb:142:in `initialize'
from C:/Ruby23-x64/lib/ruby/gems/2.3.0/gems/activerecord-oracle_enhanced-adapter-1.6.7/lib/active_record/connection_adapters/oracle_enhanced/oci_connection.rb:333:in `new'
from C:/Ruby23-x64/lib/ruby/gems/2.3.0/gems/activerecord-oracle_enhanced-adapter-1.6.7/lib/active_record/connection_adapters/oracle_enhanced/oci_connection.rb:333:in `new_connection'
from C:/Ruby23-x64/lib/ruby/gems/2.3.0/gems/activerecord-oracle_enhanced-adapter-1.6.7/lib/active_record/connection_adapters/oracle_enhanced/oci_connection.rb:393:in `initialize'
from C:/Ruby23-x64/lib/ruby/gems/2.3.0/gems/activerecord-oracle_enhanced-adapter-1.6.7/lib/active_record/connection_adapters/oracle_enhanced/oci_connection.rb:26:in `new'
from C:/Ruby23-x64/lib/ruby/gems/2.3.0/gems/activerecord-oracle_enhanced-adapter-1.6.7/lib/active_record/connection_adapters/oracle_enhanced/oci_connection.rb:26:in `initialize'
from C:/Ruby23-x64/lib/ruby/gems/2.3.0/gems/activerecord-oracle_enhanced-adapter-1.6.7/lib/active_record/connection_adapters/oracle_enhanced/connection.rb:9:in `new'
from C:/Ruby23-x64/lib/ruby/gems/2.3.0/gems/activerecord-oracle_enhanced-adapter-1.6.7/lib/active_record/connection_adapters/oracle_enhanced/connection.rb:9:in `create'
from C:/Ruby23-x64/lib/ruby/gems/2.3.0/gems/activerecord-oracle_enhanced-adapter-1.6.7/lib/active_record/connection_adapters/oracle_enhanced_adapter.rb:156:in `oracle_enhanced_connection'
from C:/Ruby23-x64/lib/ruby/gems/2.3.0/gems/activerecord-4.2.6/lib/active_record/connection_adapters/abstract/connection_pool.rb:438:in `new_connection'
from C:/Ruby23-x64/lib/ruby/gems/2.3.0/gems/activerecord-4.2.6/lib/active_record/connection_adapters/abstract/connection_pool.rb:448:in `checkout_new_connection'
from C:/Ruby23-x64/lib/ruby/gems/2.3.0/gems/activerecord-4.2.6/lib/active_record/connection_adapters/abstract/connection_pool.rb:422:in `acquire_connection'
from C:/Ruby23-x64/lib/ruby/gems/2.3.0/gems/activerecord-4.2.6/lib/active_record/connection_adapters/abstract/connection_pool.rb:349:in `block in checkout'
from C:/Ruby23-x64/lib/ruby/2.3.0/monitor.rb:214:in `mon_synchronize'
from C:/Ruby23-x64/lib/ruby/gems/2.3.0/gems/activerecord-4.2.6/lib/active_record/connection_adapters/abstract/connection_pool.rb:348:in `checkout'
from C:/Ruby23-x64/lib/ruby/gems/2.3.0/gems/activerecord-4.2.6/lib/active_record/connection_adapters/abstract/connection_pool.rb:263:in `block in connection'
from C:/Ruby23-x64/lib/ruby/2.3.0/monitor.rb:214:in `mon_synchronize'
from C:/Ruby23-x64/lib/ruby/gems/2.3.0/gems/activerecord-4.2.6/lib/active_record/connection_adapters/abstract/connection_pool.rb:262:in `connection'
from C:/Ruby23-x64/lib/ruby/gems/2.3.0/gems/activerecord-4.2.6/lib/active_record/connection_adapters/abstract/connection_pool.rb:571:in `retrieve_connection'
from C:/Ruby23-x64/lib/ruby/gems/2.3.0/gems/activerecord-4.2.6/lib/active_record/connection_handling.rb:113:in `retrieve_connection'
from C:/Ruby23-x64/lib/ruby/gems/2.3.0/gems/activerecord-4.2.6/lib/active_record/connection_handling.rb:87:in `connection'
from C:/Ruby23-x64/lib/ruby/gems/2.3.0/gems/activerecord-4.2.6/lib/active_record/model_schema.rb:230:in `table_exists?'
from C:/Ruby23-x64/lib/ruby/gems/2.3.0/gems/activerecord-4.2.6/lib/active_record/attribute_methods/primary_key.rb:97:in `get_primary_key'
from C:/Ruby23-x64/lib/ruby/gems/2.3.0/gems/activerecord-4.2.6/lib/active_record/attribute_methods/primary_key.rb:85:in `reset_primary_key'
from C:/Ruby23-x64/lib/ruby/gems/2.3.0/gems/activerecord-4.2.6/lib/active_record/attribute_methods/primary_key.rb:73:in `primary_key'
from C:in `primary_key'
from C:/Ruby23-x64/lib/ruby/gems/2.3.0/gems/activerecord-4.2.6/lib/active_record/relation/finder_methods.rb:493:in `find_nth_with_limit'
from C:/Ruby23-x64/lib/ruby/gems/2.3.0/gems/activerecord-4.2.6/lib/active_record/relation/finder_methods.rb:484:in `find_nth'
from C:/Ruby23-x64/lib/ruby/gems/2.3.0/gems/activerecord-4.2.6/lib/active_record/relation/finder_methods.rb:127:in `first'
from C:in `first'
from oracle_db_connection.rb:30:in `<main>'
I installed Oracle instant client by downloading and unzipped it to
**C:\Program Files\Oracle\instantclient_12_1**
I added the environment variable TNS_ADMIN pointing to C:\Program Files\Oracle\instantclient_12_1.
I added TNS_ADMIN to the Path.
When running the simple ruby script:
require 'active_record'
ActiveRecord::Base.establish_connection(
adapter: 'oracle_enhanced',
database: 'my_db_sid',
host: 'my_db_host',
port: 1531,
username: 'username',
password: 'password'
)
class Customer < ActiveRecord::Base
self.table_name = 'CUSTOMER'
end
puts "First: #{Customer.first}"
If I remove the call to the Customer table, I can inspect connection object:
connection = ActiveRecord::Base.establish_connection(
adapter: 'oracle_enhanced',
database: 'my_db_sid',
host: 'my_db_host',
port: 1531,
username: 'username',
password: 'password'
)
puts connection.inspect
#class Customer < ActiveRecord::Base
# self.table_name = 'CUSTOMER'
#end
#
#puts "First: #{Customer.first}"
Any idea on what is wrong here ? The script worked previousely fine on other PCs but with other DBs and environement. So the used settings should be fine.
Thank you.
Environment:
Windows 7 x 64 bits Ruby 2.3
activerecord-oracle_enhanced-adapter (1.6.7)
ruby-oci8 (2.2.2 x64-mingw32)

Answer 1

You need to use some different format of database section. Here's my config:
adapter: "oracle_enhanced"
username: "db_user"
database: "//my.host/my.sid"
password: "passw0rd"

Answer 2

I figured out how to connect to one of 2 databases. They have different settings, at least in Sqldeveloper v 4.1.3.20.
Here are the settings that worked for me (please note, it is out of Rails context, just a ruby file):
require 'active_record'
ActiveRecord::Base.establish_connection(
adapter: 'oracle_enhanced',
host: 'as specified in the field Host name of SQL developer',
port: 'as specified in the field Port of SQL developer',
database: 'as specified in the fiels Service name of SQL developer',
username: 'username',
password: 'userpassword'
)
class Department < ActiveRecord::Base
self.table_name = 'DEPARTMENTS'
end
puts "First found department: #{Department.first.inspect}"
The second database has different settings in SQL developer:
- host: some_host_url
- port: some port number
- SID: some SID value
The last soltion was to add the following settings:
HOST = "your host"
PORT = XXXX #your port number
SID = 'your SID'
ActiveRecord::Base.establish_connection(
adapter: 'oracle_enhanced',
database: "(DESCRIPTION=
(ADDRESS_LIST=(ADDRESS=(PROTOCOL=tcp)(HOST=#{HOST})(PORT=#{PORT})))
(CONNECT_DATA=(SID=#{SID}))
)",
username: 'user',
password: 'secret'
)
Hope this helps.