added count for model

examples/Count/app.js

+var Sequelize = require(__dirname + "/../../lib/sequelize/Sequelize").Sequelize,
+    sequelize = new Sequelize("sequelize_test", "root", null, { disableLogging: false })
+
+var Person = sequelize.define('person', { name: Sequelize.STRING })
+
+Sequelize.chainQueries({drop: sequelize}, {sync: sequelize}, function() {
+  var count   = 10,
+      queries = []
+  
+  for(var i = 0; i < count; i++) {
+    var p = new Person({name: 'someone'})
+    queries.push({ save: p })
+  }
+  
+  Sequelize.Helper.log("Begin to save " + count + " items!")
+  Sequelize.chainQueries(queries, function() {
+    Sequelize.Helper.log("Finished!")
+
+    Person.count(function(count) {
+      Sequelize.Helper.log("Counted " + count + " elements!")
+    })
+  })
+})
\ No newline at end of file

lib/sequelize/SequelizeTable.js

@@ -257,6 +257,12 @@ exports.SequelizeTable = function(Sequelize, sequelize, tableName, attributes, o
       }
       }
 
 
       return _table
       return _table
+    },
+    
+    count: function(callback) {
+      sequelize.query(Sequelize.sqlQueryFor("select", {fields: "count(id)", table: table.tableName}), function(result) {
+        callback && callback(result[0]["count(id)"])
+      })
     }
     }
   }
   }
   // don't put this into the hash!
   // don't put this into the hash!