Changed the interface on AbstractAdapter to require that adapters return the number of affected rows on delete and update operations. Added that Base.update_all and Base.delete_all return an integer of the number of affected rows #341

git-svn-id: http://svn-commit.rubyonrails.org/rails/trunk@228 5ecf4fe2-1ee6-0310-87b1-e25e094e27de

activerecord/CHANGELOG

@@ -1,5 +1,9 @@
 *SVN*
 
+* Added that Base.update_all and Base.delete_all return an integer of the number of affected rows #341
+
+* Changed the interface on AbstractAdapter to require that adapters return the number of affected rows on delete and update operations.
+
 * Added that query benchmarking will only happen if its going to be logged anyway #344
 
 * Added higher_item and lower_item as public methods for acts_as_list #342 [Tobias Luetke]

activerecord/lib/active_record/base.rb

@@ -343,13 +343,13 @@ module ActiveRecord #:nodoc:
         find(id).destroy
       end
 
-      # Updates all records with the SET-part of an SQL update statement in +updates+. A subset of the records can be selected 
-      # by specifying +conditions+. Example:
+      # Updates all records with the SET-part of an SQL update statement in +updates+ and returns an integer with the number of rows updates.
+      # A subset of the records can be selected by specifying +conditions+. Example:
       #   Billing.update_all "category = 'authorized', approved = 1", "author = 'David'"
       def update_all(updates, conditions = nil)
         sql  = "UPDATE #{table_name} SET #{updates} "
         add_conditions!(sql, conditions)
-        connection.update(sql, "#{name} Update")
+        return connection.update(sql, "#{name} Update")
       end
     
       # Destroys the objects for all the records that matches the +condition+ by instantiating each object and calling

activerecord/lib/active_record/connection_adapters/abstract_adapter.rb

@@ -285,10 +285,10 @@ module ActiveRecord
       # Returns the last auto-generated ID from the affected table.
       def insert(sql, name = nil, pk = nil, id_value = nil) end
 
-      # Executes the update statement.
+      # Executes the update statement and returns the number of rows affected.
       def update(sql, name = nil) end
 
-      # Executes the delete statement.
+      # Executes the delete statement and returns the number of rows affected.
       def delete(sql, name = nil) end
 
       def reset_runtime # :nodoc:

activerecord/lib/active_record/connection_adapters/mysql_adapter.rb

@@ -67,8 +67,12 @@ module ActiveRecord
         log(sql, name, @connection) { |connection| connection.query(sql) }
       end
 
-      alias_method :update, :execute
-      alias_method :delete, :execute
+      def update(sql, name = nil)
+        execute(sql, name)
+        @connection.affected_rows
+      end
+
+      alias_method :delete, :update
       
       def begin_db_transaction
         begin

activerecord/lib/active_record/connection_adapters/postgresql_adapter.rb

@@ -64,8 +64,13 @@ module ActiveRecord
         log(sql, name, @connection) { |connection| connection.query(sql) }
       end
 
-      alias_method :update, :execute
-      alias_method :delete, :execute
+      def update(sql, name = nil)
+        result = nil
+        log(sql, name, @connection) { |connection| result = connection.exec(sql) }
+        result.cmdtuples
+      end
+
+      alias_method :delete, :update
 
       def begin_db_transaction()    execute "BEGIN" end
       def commit_db_transaction()   execute "COMMIT" end

activerecord/lib/active_record/connection_adapters/sqlite_adapter.rb

@@ -62,8 +62,16 @@ module ActiveRecord
         end
       end
 
-      alias_method :update, :execute
-      alias_method :delete, :execute
+      def update(sql, name = nil)
+        execute(sql, name)
+        @connection.changes
+      end
+      
+      def delete(sql, name = nil)
+        sql += " WHERE 1=1" unless sql =~ /WHERE/i
+        execute(sql, name)
+        @connection.changes
+      end
 
       def begin_db_transaction()    execute "BEGIN" end
       def commit_db_transaction()   execute "COMMIT" end

activerecord/test/base_test.rb

@@ -260,11 +260,15 @@ class BasicsTest < Test::Unit::TestCase
   end
   
   def test_update_all
-    Topic.update_all "content = 'bulk updated!'"
+    assert_equal 2, Topic.update_all("content = 'bulk updated!'")
     assert_equal "bulk updated!", Topic.find(1).content
     assert_equal "bulk updated!", Topic.find(2).content
   end
-  
+
+  def test_delete_all
+    assert_equal 2, Topic.delete_all
+  end
+
   def test_update_by_condition
     Topic.update_all "content = 'bulk updated!'", "approved = 1"
     assert_equal "Have a nice day", Topic.find(1).content

activerecord/test/fixtures/db_definitions/sqlite.sql

@@ -33,7 +33,7 @@ CREATE TABLE 'topics' (
 CREATE TABLE 'developers' (
   'id' INTEGER PRIMARY KEY NOT NULL,
   'name' TEXT DEFAULT NULL,
-  'salary' INTEGER 70000
+  'salary' INTEGER DEFAULT 70000
 );
 
 CREATE TABLE 'projects' (