add count functionality

index.js

@@ -198,6 +198,19 @@ exports.Adapter = function(settings) {
 		return that;
 	};
 
+	this.count = function(tableName, responseCallback) {
+		if (typeof tableName === 'string') {
+			var combinedQueryString = 'SELECT COUNT(*) as count FROM ' + escapeFieldName(tableName)
+			+ buildJoinString()
+			+ buildDataString(whereClause, ' AND ', 'WHERE');
+
+			connection.query(combinedQueryString, function(err, res) { responseCallback(null, res[0]['count'])});
+			resetQuery(combinedQueryString);
+		}
+
+		return that;
+	}
+
 	this.join = function(tableName, relation, direction) {
 		joinClause.push({
 			table: tableName,

package.json

@@ -1,6 +1,6 @@
 {
 	"name" : "mysql-activerecord",
-	"version": "0.7.2",
+	"version": "0.7.3",
 	"author": "Martin Tajur <martin@tajur.ee>",
 	"description": "MySQL ActiveRecord pattern implementation on top of the mysql module.",
 	"homepage": "https://github.com/martintajur/node-mysql-activerecord",