[nodejs] nodejs开发个人博客（五）分配数据

使用回掉大坑进行取数据

能看明白的就看，看不明白的手动滑稽

/**
* 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);
    }
};