Changes sql SELECT to support special objects in condition values (fixes

 #19)

Example:

```js
Person.find({ age: orm.between(20, 30) }, cb);
```

Other special objects:

- orm.eq(val): equal to val
- orm.ne(val): not equal to val
- orm.gt(val): greater than val
- orm.gte(val): greater or equal to val
- orm.lt(val): lesser than val
- orm.lte(val): lesser or equal to val

lib/sql/Select.js

@@ -30,10 +30,11 @@ Builder.prototype.table = function (table) {
 };
 
 Builder.prototype.where = function (field, value, comparison) {
-  if (!Array.isArray(value) && typeof(value) === 'object') {
-    comparison = value.op || value.operator || value.comp || value.comparison;
-    value = value.value;
-  }
+	// stand by for now..
+	// if (!Array.isArray(value) && typeof(value) === 'object') {
+	// 	comparison = value.op || value.operator || value.comp || value.comparison;
+	// 	value = value.value;
+	// }
 	this.opts.where.push({
 		field : field,
 		value : value,
@@ -118,6 +119,41 @@ Builder.prototype.build = function () {
 	// where
 	lst = [];
 	for (i = 0; i < this.opts.where.length; i++) {
+		if (typeof this.opts.where[i].value.orm_special_object == "function") {
+			var op = this.opts.where[i].value.orm_special_object();
+			switch (op) {
+				case "between":
+					lst.push([
+						this.escapeId(this.opts.where[i].field),
+						"BETWEEN",
+						this.escape(this.opts.where[i].value.from),
+						"AND",
+						this.escape(this.opts.where[i].value.to)
+					].join(" "));
+					break;
+				case "eq":
+				case "ne":
+				case "gt":
+				case "gte":
+				case "lt":
+				case "lte":
+					switch (op) {
+						case "eq"  : op = "=";  break;
+						case "ne"  : op = "<>";  break;
+						case "gt"  : op = ">";  break;
+						case "gte" : op = ">="; break;
+						case "lt"  : op = "<";  break;
+						case "lte" : op = "<="; break;
+					}
+					lst.push([
+						this.escapeId(this.opts.where[i].field),
+						op,
+						this.escape(this.opts.where[i].value.val)
+					].join(" "));
+					break;
+			}
+			continue;
+		}
 		lst.push([
 			this.escapeId(this.opts.where[i].field),
 			this.opts.where[i].comp,

test/integration/test-find-where.js

@@ -12,7 +12,7 @@ common.createConnection(function (err, db) {
 
 			var TestModel = db.define(tableName, common.getModelProperties());
 
-			TestModel.find({ id: { value: 1, comparison: '<>' }}, function (err, Instances) {
+			TestModel.find({ id: common.ORM.ne(1) }, function (err, Instances) {
 				assert.equal(err, null);
 				assert.equal(Array.isArray(Instances), true);
 				assert.equal(Instances[0].id, 2);