Don't append limit to primary key column definition. Freeze some cons…

…tants.

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

@@ -254,7 +254,7 @@ def dump_schema_information #:nodoc:
 
       def type_to_sql(type, limit = nil, precision = nil, scale = nil) #:nodoc:
         if native = native_database_types[type]
-          column_type_sql = native.is_a?(Hash) ? native[:name] : native
+          column_type_sql = (native.is_a?(Hash) ? native[:name] : native).dup
 
           if type == :decimal # ignore limit, use precision and scale
             scale ||= native[:scale]
@@ -269,7 +269,7 @@ def type_to_sql(type, limit = nil, precision = nil, scale = nil) #:nodoc:
               raise ArgumentError, "Error adding decimal column: precision cannot be empty if scale if specified"
             end
 
-          elsif limit ||= native.is_a?(Hash) && native[:limit]
+          elsif (type != :primary_key) && (limit ||= native.is_a?(Hash) && native[:limit])
             column_type_sql << "(#{limit})"
           end
 

activerecord/lib/active_record/connection_adapters/mysql_adapter.rb

@@ -151,13 +151,30 @@ class MysqlAdapter < AbstractAdapter
       @@emulate_booleans = true
       cattr_accessor :emulate_booleans
 
+      ADAPTER_NAME = 'MySQL'.freeze
+
       LOST_CONNECTION_ERROR_MESSAGES = [
         "Server shutdown in progress",
         "Broken pipe",
         "Lost connection to MySQL server during query",
         "MySQL server has gone away"
       ]
 
+      NATIVE_DATABASE_TYPES = {
+        :primary_key => "int(11) DEFAULT NULL auto_increment PRIMARY KEY".freeze,
+        :string      => { :name => "varchar", :limit => 255 },
+        :text        => { :name => "text" },
+        :integer     => { :name => "int"},
+        :float       => { :name => "float" },
+        :decimal     => { :name => "decimal" },
+        :datetime    => { :name => "datetime" },
+        :timestamp   => { :name => "datetime" },
+        :time        => { :name => "time" },
+        :date        => { :name => "date" },
+        :binary      => { :name => "blob" },
+        :boolean     => { :name => "tinyint", :limit => 1 }
+      }
+
       def initialize(connection, logger, connection_options, config)
         super(connection, logger)
         @connection_options, @config = connection_options, config
@@ -166,28 +183,15 @@ def initialize(connection, logger, connection_options, config)
       end
 
       def adapter_name #:nodoc:
-        'MySQL'
+        ADAPTER_NAME
       end
 
       def supports_migrations? #:nodoc:
         true
       end
 
       def native_database_types #:nodoc:
-        {
-          :primary_key => "int(11) DEFAULT NULL auto_increment PRIMARY KEY",
-          :string      => { :name => "varchar", :limit => 255 },
-          :text        => { :name => "text" },
-          :integer     => { :name => "int", :limit => 11 },
-          :float       => { :name => "float" },
-          :decimal     => { :name => "decimal" },
-          :datetime    => { :name => "datetime" },
-          :timestamp   => { :name => "datetime" },
-          :time        => { :name => "time" },
-          :date        => { :name => "date" },
-          :binary      => { :name => "blob" },
-          :boolean     => { :name => "tinyint", :limit => 1 }
-        }
+        NATIVE_DATABASE_TYPES
       end
 
 

activerecord/lib/active_record/connection_adapters/postgresql_adapter.rb

@@ -224,9 +224,26 @@ module ConnectionAdapters
     # * <tt>:min_messages</tt> -- An optional client min messages that is used in a SET client_min_messages TO <min_messages> call on the connection.
     # * <tt>:allow_concurrency</tt> -- If true, use async query methods so Ruby threads don't deadlock; otherwise, use blocking query methods.
     class PostgreSQLAdapter < AbstractAdapter
+      ADAPTER_NAME = 'PostgreSQL'.freeze
+
+      NATIVE_DATABASE_TYPES = {
+        :primary_key => "serial primary key".freeze,
+        :string      => { :name => "character varying", :limit => 255 },
+        :text        => { :name => "text" },
+        :integer     => { :name => "integer" },
+        :float       => { :name => "float" },
+        :decimal     => { :name => "decimal" },
+        :datetime    => { :name => "timestamp" },
+        :timestamp   => { :name => "timestamp" },
+        :time        => { :name => "time" },
+        :date        => { :name => "date" },
+        :binary      => { :name => "bytea" },
+        :boolean     => { :name => "boolean" }
+      }
+
       # Returns 'PostgreSQL' as adapter name for identification purposes.
       def adapter_name
-        'PostgreSQL'
+        ADAPTER_NAME
       end
 
       # Initializes and connects a PostgreSQL adapter.
@@ -268,20 +285,7 @@ def disconnect!
       end
 
       def native_database_types #:nodoc:
-        {
-          :primary_key => "serial primary key",
-          :string      => { :name => "character varying", :limit => 255 },
-          :text        => { :name => "text" },
-          :integer     => { :name => "integer" },
-          :float       => { :name => "float" },
-          :decimal     => { :name => "decimal" },
-          :datetime    => { :name => "timestamp" },
-          :timestamp   => { :name => "timestamp" },
-          :time        => { :name => "time" },
-          :date        => { :name => "date" },
-          :binary      => { :name => "bytea" },
-          :boolean     => { :name => "boolean" }
-        }
+        NATIVE_DATABASE_TYPES
       end
 
       # Does PostgreSQL support migrations?

activerecord/lib/active_record/fixtures.rb

@@ -543,7 +543,7 @@ def initialize(connection, table_name, class_name, fixture_path, file_filter = D
     @connection, @table_name, @fixture_path, @file_filter = connection, table_name, fixture_path, file_filter
     @class_name = class_name ||
                   (ActiveRecord::Base.pluralize_table_names ? @table_name.singularize.camelize : @table_name.camelize)
-    @table_name = ActiveRecord::Base.table_name_prefix + @table_name + ActiveRecord::Base.table_name_suffix
+    @table_name = "#{ActiveRecord::Base.table_name_prefix}#{@table_name}#{ActiveRecord::Base.table_name_suffix}"
     @table_name = class_name.table_name if class_name.respond_to?(:table_name)
     @connection = class_name.connection if class_name.respond_to?(:connection)
     read_fixture_files