Access Sql Server through Ruby Active Record JDBC - sql-server

Question

I've been attempting to connect to a remote JDBC/SqlServer database using Active Record in Ruby (specifically JRuby). Here is my code:
require 'activerecord'
require 'activerecord-jdbc-adapter'
ActiveRecord::Base.establish_connection(
:adapter => 'sqlserver',
:username => '<username>',
:password => '<password>',
:database => '<database_name>',
:url => '<database_url>',
)
#connection = ActiveRecord::Base.connection
puts #connection
I've also put 'jdbc' as the adapter, and that also did not work.
And here is an abbreviated version of the error I am getting:
NameError: cannot load Java class com.microsoft.sqlserver.jdbc.SQLServerDriver
for_name at org/jruby/javasupport/JavaClass.java:286
get_proxy_class at org/jruby/javasupport/JavaUtilities.java:34
block in java_import at uri:classloader:/jruby/java/core_ext/object.rb:49
map at org/jruby/RubyArray.java:2486
java_import at uri:classloader:/jruby/java/core_ext/object.rb:36
block in driver_class at C:/jruby-9.1.12.0/lib/ruby/gems/shared/gems/activerecord-jdbc-adapter-1.3.23/lib/arjdbc/jdbc/driver.rb:24
module_eval at org/jruby/RubyModule.java:2833
block in driver_class at C:/jruby-9.1.12.0/lib/ruby/gems/shared/gems/activerecord-jdbc-adapter-1.3.23/lib/arjdbc/jdbc/driver.rb:23
synchronized at org/jruby/javasupport/JavaObject.java:257
It's not so much a specific problem but more that I'm just unsure where to go from here. Using the 'activerecord-sqlserver-adapter' in pure Ruby doesn't work because of the JDBC on the server. (I might be misusing the terms here, I'm rather unfamiliar with how databases work.)
However, the jdbc/sqlserver gems seem to be not well-supported or out of date. There's probably no silver bullet for this, but any kind of direction would be of enormous help.

Answer 1

You still need to require 'active_record', no?
And I am not sure you need the require 'arel'. That is the low level sql builder/formatter implemented by active_record.
require 'active_record'
require 'activerecord-jdbc-adapter'
ActiveRecord::Base.pluralize_table_names = false
ActiveRecord::Base.establish_connection(
:adapter => "sqlserver",
:host => "SqlServerHostName",
:database => "HostDbName"
)