added min and max functions to the model

lib/sequelize/model-definition.js

@@ -107,6 +107,26 @@ ModelDefinition.prototype.count = function(options) {
   return emitter.run()
   return emitter.run()
 }
 }
 
 
+ModelDefinition.prototype.max = function(field, options) {
+  var self = this
+  
+  var emitter = new Utils.CustomEventEmitter(function() {
+    self.query(QueryGenerator.maxQuery(self.tableName, field,options), self, {plain: true}).on('success', function(obj) {
+      emitter.emit('success', obj['max'])
+    })
+  })
+  return emitter.run()
+}
+ModelDefinition.prototype.min = function(field, options) {
+  var self = this
+  
+  var emitter = new Utils.CustomEventEmitter(function() {
+    self.query(QueryGenerator.minQuery(self.tableName, field,options), self, {plain: true}).on('success', function(obj) {
+      emitter.emit('success', obj['min'])
+    })
+  })
+  return emitter.run()
+}
 ModelDefinition.prototype.findAll = function(options) {
 ModelDefinition.prototype.findAll = function(options) {
   return this.query(QueryGenerator.selectQuery(this.tableName, options))
   return this.query(QueryGenerator.selectQuery(this.tableName, options))
 }
 }

lib/sequelize/query-generator.js

@@ -78,7 +78,12 @@ var QueryGenerator = module.exports = {
   countQuery: function(tableName, options) {
   countQuery: function(tableName, options) {
     return QueryGenerator.selectQuery(tableName, options).replace("*", "count(*)")
     return QueryGenerator.selectQuery(tableName, options).replace("*", "count(*)")
   },
   },
-  
+  maxQuery: function(tableName, field,options) {
+    return QueryGenerator.selectQuery(tableName ,options).replace("*", "max("+field+") as max")
+  },
+  minQuery: function(tableName, field,options) {
+    return QueryGenerator.selectQuery(tableName ,options).replace("*", "min("+field+") as min")
+  },
   /*
   /*
     Returns an insert into command. Parameters: table name + hash of attribute-value-pairs.
     Returns an insert into command. Parameters: table name + hash of attribute-value-pairs.
   */
   */