Improve handling of LoadErrors with the oracle adapter. Closes #6780 [kubo]

git-svn-id: http://svn-commit.rubyonrails.org/rails/trunk@5956 5ecf4fe2-1ee6-0310-87b1-e25e094e27de

activerecord/lib/active_record/connection_adapters/abstract/schema_statements.rb

@@ -265,7 +265,7 @@ def type_to_sql(type, limit = nil, precision = nil, scale = nil) #:nodoc:
               column_type_sql << "(#{precision})"
             end
           else
-            raise ArgumentError, "Error adding decimal column: precision cannot be empty if scale if specifed" if scale
+            raise ArgumentError, "Error adding decimal column: precision cannot be empty if scale if specified" if scale
           end
           column_type_sql
         else

activerecord/lib/active_record/connection_adapters/oracle_adapter.rb

@@ -676,13 +676,14 @@ def exec(sql, *bindvars, &block)
   # OCI8 driver is unavailable.
   module ActiveRecord # :nodoc:
     class Base
+      @@oracle_error_message = "Oracle/OCI libraries could not be loaded: #{$!.to_s}"
       def self.oracle_connection(config) # :nodoc:
         # Set up a reasonable error message
-        raise LoadError, "Oracle/OCI libraries could not be loaded."
+        raise LoadError, @@oracle_error_message
       end
       def self.oci_connection(config) # :nodoc:
         # Set up a reasonable error message
-        raise LoadError, "Oracle/OCI libraries could not be loaded."
+        raise LoadError, @@oracle_error_message
       end
     end
   end