More incremental work on active schema for MySQL

git-svn-id: http://svn-commit.rubyonrails.org/rails/trunk@884 5ecf4fe2-1ee6-0310-87b1-e25e094e27de

activerecord/lib/active_record/connection_adapters/abstract_adapter.rb

@@ -377,8 +377,9 @@ module ActiveRecord
       end
 
       def add_column(table_name, column_name, type, options = {})
-        add_column_sql = "ALTER TABLE #{table_name} ADD #{column_name} #{native_database_types[type]}"
-        add_column_sql << "(#{limit})" if options[:limit]
+        native_type = native_database_types[type]
+        add_column_sql = "ALTER TABLE #{table_name} ADD #{column_name} #{native_type[:name]}"
+        add_column_sql << "(#{options[:limit] || native_type[:limit]})" if options[:limit] || native_type[:limit]
         add_column_sql << " DEFAULT '#{options[:default]}'" if options[:default]
         execute(add_column_sql)
       end

activerecord/lib/active_record/connection_adapters/mysql_adapter.rb

@@ -66,17 +66,17 @@ module ActiveRecord
 
       def native_database_types
         {
-          :primary_key => "int(11) DEFAULT NULL auto_increment PRIMARY KEY",
-          :string      => "varchar(255)",
-          :text        => "text",
-          :integer     => "int(11)",
-          :float       => "float",
-          :datetime    => "datetime",
-          :timestamp   => "datetime",
-          :time        => "datetime",
-          :date        => "date",
-          :binary      => "blob",
-          :boolean     => "tinyint(1)"
+          :primary_key => { :name => "int(11) DEFAULT NULL auto_increment PRIMARY KEY" },
+          :string      => { :name => "varchar", :limit => 255 },
+          :text        => { :name => "text" },
+          :integer     => { :name => "int", :limit => 11 },
+          :float       => { :name => "float" },
+          :datetime    => { :name => "datetime" },
+          :timestamp   => { :name => "datetime" },
+          :time        => { :name => "datetime" },
+          :date        => { :name => "date" },
+          :binary      => { :name => "blob" },
+          :boolean     => { :name => "tinyint", :limit => 1 }
         }
       end
 

activerecord/test/active_schema_mysql.rb

@@ -0,0 +1,31 @@
+require 'abstract_unit'
+
+class ActiveSchemaTest < Test::Unit::TestCase
+  def setup
+    ActiveRecord::ConnectionAdapters::MysqlAdapter.class_eval do
+      alias_method :real_execute, :execute
+      def execute(sql, name = nil) return sql end
+    end    
+  end
+  
+  def teardown
+    ActiveRecord::ConnectionAdapters::MysqlAdapter.send(:alias_method, :execute, :real_execute)
+  end
+
+  def test_drop_table
+    assert_equal "DROP TABLE people", drop_table(:people)
+  end
+  
+  def test_add_column
+    assert_equal "ALTER TABLE people ADD last_name varchar(255)", add_column(:people, :last_name, :string)
+  end
+  
+  def test_add_column_with_limit
+    assert_equal "ALTER TABLE people ADD key varchar(32)", add_column(:people, :key, :string, :limit => 32)
+  end
+  
+  private
+    def method_missing(method_symbol, *arguments)
+      ActiveRecord::Base.connection.send(method_symbol, *arguments)
+    end
+end