nodejs个人博客开发第五步 分配数据

/**
* 首页控制器
*/
var router=express.Router();
/*每页条数*/
var pageSize=5;

router.get('/',function(req,res,next){
  var currentPage=parseInt(req.params.page);
  var cid=0;
  
  var categoryModel=F.model("category");
  var articleModel=F.model("article");
  // 分类数据
  categoryModel.getAllList(function(err,categoryList){
    // 文章条数
    articleModel.getCount(cid,function(err,nums){
      // 文章分页
      articleModel.getArticlePager(cid,currentPage,pageSize,function(err,articleList){
        var nextPage=(currentPage+1)>=Math.ceil(nums[0].num/pageSize) ? Math.ceil(nums[0].num/pageSize) : currentPage+1;
        var prePage=(currentPage-1)<=0 ? 1 : currentPage-1;
        // 归档
        articleModel.getArchives(function(err,allArticleTime){
          var newArticleTime=[];
          for(var i=0;i<allArticleTime.length;i++){
            newArticleTime.push(F.phpDate("y年m月",allArticleTime[i].time));
          }
          /*分配数据*/
          var data={
            categoryList:categoryList,
            articleList:articleList,
            cid:cid,
            nextPage:nextPage==0 ? 1 : nextPage,
            prePage:prePage,
            allArticleTime:newArticleTime,
            currentPage:currentPage
          };
          
          /*渲染模板*/
          res.render("home/index",data);  
        });      
      });
    });

  });
  
  //F.model("category").addCate({"name":"测试"});
  //F.model("category").saveCate({"name":"测试1"},"id=4");
  //F.model("category").delCate("id=4");
  /*渲染模板*/
  //res.render("home/index");
});
module.exports=router;

/**
* 文章模型文件
*/
module.exports={
  /*获取条数*/
  getCount:function(categoryId,callback){
    var condition="";
    if(categoryId!=0){
      condition="where category_id="+categoryId;
    }  
    var sql="select count(*) num from article "+condition;
    db.query(sql,callback);
  },
  /*获取分页数据*/
  getArticlePager:function(categoryId,currentPage,pageSize,callback){
    if(currentPage<=0||!currentPage) currentPage=1;
    var start=(currentPage-1)*pageSize;
    var end=pageSize;
    var condition="";
    if(categoryId!=0){
      condition="where category_id="+categoryId;
    }
    var sql="select * from article "+condition+" order by time desc limit "+start+","+end;
    db.query(sql,callback);
  },
  /*归档*/
  getArchives:function(callback){
    db.query("select time from article order by time desc",callback);
  }
};