Fixed handling of binary content in blobs and similar fields for Ruby/MySQL and SQLite #409 [xal]

git-svn-id: http://svn-commit.rubyonrails.org/rails/trunk@309 5ecf4fe2-1ee6-0310-87b1-e25e094e27de

activerecord/CHANGELOG

@@ -1,5 +1,7 @@
 *SVN*
 
+* Fixed handling of binary content in blobs and similar fields for Ruby/MySQL and SQLite #409 [xal]
+
 * Added dynamic attribute-based finders as a cleaner way of getting objects by simple queries without turning to SQL. 
   They work by appending the name of an attribute to <tt>find_by_</tt>, so you get finders like <tt>Person.find_by_user_name,
   Payment.find_by_transaction_id</tt>. So instead of writing <tt>Person.find_first(["user_name = ?", user_name])</tt>, you just do

activerecord/lib/active_record/connection_adapters/abstract_adapter.rb

@@ -184,6 +184,7 @@ module ActiveRecord
           when :timestamp     then Time
           when :time          then Time
           when :text, :string then String
+          when :binary        then String
           when :boolean       then Object
         end
       end
@@ -199,6 +200,7 @@ module ActiveRecord
           when :timestamp then string_to_time(value)
           when :time      then string_to_dummy_time(value)
           when :date      then string_to_date(value)
+          when :binary    then binary_to_string(value)
           when :boolean   then (value == "t" or value == true ? true : false)
           else value
         end
@@ -207,6 +209,14 @@ module ActiveRecord
       def human_name
         Base.human_attribute_name(@name)
       end
+      
+      def string_to_binary(value)
+        value
+      end     
+
+      def binary_to_string(value)
+        value
+      end     
 
       private
         def string_to_date(string)
@@ -229,7 +239,7 @@ module ActiveRecord
           # pad the resulting array with dummy date information
           time_array[0] = 2000; time_array[1] = 1; time_array[2] = 1;
           Time.send(Base.default_timezone, *time_array) rescue nil
-        end
+        end 
         
         def extract_limit(sql_type)
           $1.to_i if sql_type =~ /\((.*)\)/
@@ -249,8 +259,10 @@ module ActiveRecord
               :time
             when /date/i
               :date
-            when /(c|b)lob/i, /text/i
+            when /clob/i, /text/i
               :text
+            when /blob/i, /binary/i
+              :binary
             when /char/i, /string/i
               :string
             when /boolean/i
@@ -323,7 +335,12 @@ module ActiveRecord
 
       def quote(value, column = nil)
         case value
-          when String                then "'#{quote_string(value)}'" # ' (for ruby-mode)
+          when String                
+            if column && column.type == :binary
+              "'#{quote_string(column.string_to_binary(value))}'" # ' (for ruby-mode)
+            else
+              "'#{quote_string(value)}'" # ' (for ruby-mode)
+            end
           when NilClass              then "NULL"
           when TrueClass             then (column && column.type == :boolean ? "'t'" : "1")
           when FalseClass            then (column && column.type == :boolean ? "'f'" : "0")

activerecord/lib/active_record/connection_adapters/sqlite_adapter.rb

@@ -25,6 +25,28 @@ module ActiveRecord
   end
 
   module ConnectionAdapters
+    
+    class SQLiteColumn < Column
+      
+      def string_to_binary(value)
+        value.gsub(/(\0|\%)/) do
+          case $1
+            when "\0" then "%00"
+            when "%" then "%25"
+          end
+        end                
+      end
+      
+      def binary_to_string(value)
+        value.gsub(/(%00|%25)/) do
+          case $1
+            when "%00" then "\0"
+            when "%25" then "%"
+          end
+        end                
+      end
+      
+    end
     class SQLiteAdapter < AbstractAdapter # :nodoc:
       def select_all(sql, name = nil)
         select(sql, name)
@@ -37,7 +59,7 @@ module ActiveRecord
 
       def columns(table_name, name = nil)
         table_structure(table_name).inject([]) do |columns, field| 
-          columns << Column.new(field['name'], field['dflt_value'], field['type'])
+          columns << SQLiteColumn.new(field['name'], field['dflt_value'], field['type'])
           columns
         end
       end