Added better exception error when unknown column types are used with migrations #1814 [fbeausoleil@ftml.net]

git-svn-id: http://svn-commit.rubyonrails.org/rails/trunk@2201 5ecf4fe2-1ee6-0310-87b1-e25e094e27de

activerecord/CHANGELOG

@@ -1,5 +1,7 @@
 *SVN*
 
+* Added better exception error when unknown column types are used with migrations #1814 [fbeausoleil@ftml.net]
+
 * Fixed "connection lost" issue with the bundled Ruby/MySQL driver (would kill the app after 8 hours of inactivity) #2163, #428 [kajism@yahoo.com]
 
 * Fixed comparison of Active Record objects so two new objects are not equal #2099 [deberg]

activerecord/lib/active_record/base.rb

@@ -28,7 +28,9 @@ module ActiveRecord #:nodoc:
   end
   class ConfigurationError < StandardError #:nodoc:
   end
-
+  class UnknownTypeError < ActiveRecordError #:nodoc:
+  end
+  
   class AttributeAssignmentError < ActiveRecordError #:nodoc:
     attr_reader :exception, :attribute
     def initialize(message, exception, attribute)
@@ -222,6 +224,8 @@ module ActiveRecord #:nodoc:
   #   objects that should be inspected to determine which attributes triggered the errors.
   # * +AttributeAssignmentError+ -- an error occurred while doing a mass assignment through the +attributes=+ method.
   #   You can inspect the +attribute+ property of the exception object to determine which attribute triggered the error.
+  # * +UnknownTypeError+ -- Raised when AbstractAdapter#type_to_sql cannot map the type given to a native type.
+  #
   # *Note*: The attributes listed are class-level attributes (accessible from both the class and instance level).
   # So it's possible to assign a logger to the class through Base.logger= which will then be used by all
   # instances in the current object space.

activerecord/lib/active_record/connection_adapters/abstract_adapter.rb

@@ -431,7 +431,14 @@ module ActiveRecord
       end       
 
       def type_to_sql(type, limit = nil)
-        native = native_database_types[type]
+        unless native = native_database_types[type]
+          raise(
+            ActiveRecord::UnknownTypeError, 
+            "Unable to convert type '#{type}' to a native type. " +
+            "Valid options: #{native_database_types.keys.to_sentence}"
+          )
+        end
+
         limit ||= native[:limit]
         column_type_sql = native[:name]
         column_type_sql << "(#{limit})" if limit

activerecord/test/active_schema_test.rb

@@ -0,0 +1,14 @@
+require 'abstract_unit'
+
+class ActiveSchemaTest < Test::Unit::TestCase
+  def test_add_column_with_native_type_rejected
+    assert_raises ActiveRecord::UnknownTypeError do
+      add_column(:people, :varchar, :limit => 15)
+    end
+  end
+
+  private
+    def method_missing(method_symbol, *arguments)
+      ActiveRecord::Base.connection.send(method_symbol, *arguments)
+    end
+end