add top with sort condition

api.md

@@ -175,6 +175,21 @@ way 2: 4 params
         done();
       });
       
+根据查询条件获取指定前xx条数,支持排序
+
+      // sort by "field" ascending and "test" descending
+      var query = {};
+      var sort = {field: 'asc', test: -1 }；
+      Top.top(30, query, sort , function(err, tops){
+        if(err){
+          console.dir(err);
+        }
+
+        // console.dir(tops.length);
+        assert.equal(tops.length == 30, true);
+        done();
+      });
+
 更改pagesize
 
       Top.pagesize = 25;

lib/dao.js

@@ -113,6 +113,7 @@ MongooseDao.prototype.latest = MongooseDao.prototype.top = MongooseDao.prototype
   var n;
   var cb;
   var q = {};
+  var sort = {};
 
   // (num, cb)
   if (arguments.length == 2) {
@@ -123,13 +124,19 @@ MongooseDao.prototype.latest = MongooseDao.prototype.top = MongooseDao.prototype
     n   = arguments[0];
     q   = arguments[1];
     cb  = arguments[2];
+  }else  if (arguments.length == 4) {
+    // (num, {},cb)
+    n   = arguments[0];
+    q   = arguments[1];
+    sort  = arguments[2];
+    cb  = arguments[3];
   }else{
     // (cb)
     n   = this.pagesize;
     cb  = arguments[0];
   }
 
-  this.model.find(q).limit(n).exec(cb);
+  this.model.find(q).sort(sort).limit(n).exec(cb);
 };
 
 // TODO: impl page by lastId

package.json

@@ -1,6 +1,6 @@
 {
   "name": "mongoosedao",
-  "version": "1.0.12",
+  "version": "1.0.13",
   "description": "mongoose dao",
   "main": "index.js",
   "scripts": {