Guard against empty view definitions when sb_helptext fails silently. Fixes #337.

Author: metaskills

CHANGELOG.md

@@ -1,4 +1,11 @@
 
+## v4.2.1
+
+#### Fixed
+
+* Guard against empty view definitions when `sb_helptext` fails silently. Fixes #337.
+
+
 ## v4.2.0
 
 #### Added

lib/active_record/connection_adapters/sqlserver/schema_statements.rb

@@ -415,6 +415,7 @@ def table_name_or_views_table_name(table_name)
 
         def views_real_column_name(table_name, column_name)
           view_definition = schema_cache.view_information(table_name)[:VIEW_DEFINITION]
+          return column_name unless view_definition
           match_data = view_definition.match(/([\w-]*)\s+as\s+#{column_name}/im)
           match_data ? match_data[1] : column_name
         end