Merge pull request #6 from danielb2/master

Adds rudimentary count

README.md

@@ -48,6 +48,7 @@ Basic support of MySQL commands
  * LIMIT and OFFSET
  * ORDER BY
  * GROUP BY
+ * COUNT
 
 Methods
 =======
@@ -204,6 +205,12 @@ Produces and executes a SELECT query.
 	db.get('people', function(err, rows, fields) { ... });
 	// This would produce: SELECT … FROM people …
 
+## .count(tableName, responseCallback)
+Produces and executes a SELECT query with count.
+
+	db.get('people', function(err, rows, fields) { ... });
+	// This would produce: SELECT count(*) FROM people …
+
 ## .query(sqlQueryString, responseCallback)
 Produces and executes a raw query. Note that while no set query conditions will be used in this query, they will all be reset nevertheless with the execution.
 
@@ -289,6 +296,18 @@ SELECT query with custom fields, WHERE, JOIN and LIMIT
 			console.log(results);
 		});
 
+Basic counting
+------------------------------------------------------
+
+	db
+		.where({
+			'people.name': 'Martin',
+			'songs.title': 'Yesterday'
+		})
+		.count('people', function(err, results, fields) {
+			console.log(results);
+		});
+
 SELECT query with custom fields and GROUP BY
 --------------------------------------------
 

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",