[nodejs] nodejs开发个人博客（四）数据模型

    /*查询*/ 
    select:function(tableName,callback,where,field){
        field=field ? field : ‘*‘;
        var sql="select "+field+" from "+this.C.DB_PRE+tableName;
        if(where){
            sql+=" where "+where;
        }
        this.db.query(sql,callback);
    }

    /*添加*/
    add:function(tableName,tableData,callback){
         var sql="insert into "+this.C.DB_PRE+tableName;
         var clumn=‘‘;
         var value=‘‘;
         for(var key in tableData){
               clumn+=","+key;
               value+=",‘"+tableData[key]+"‘";
          }
         clumns="("+clumn.substr(1)+")";
        values="("+value.substr(1)+")";
        sql=sql+clumns+"values"+values;
        console.log(sql);
        this.db.query(sql,callback);        
    }

    /*修改*/
    update:function(tableName,tableData,where,callback){
         var sql="update "+this.C.DB_PRE+tableName+" set ";
         var clumns="";
         for(var key in tableData){
               clumns+=","+key+"=‘"+tableData[key]+"‘";
          }
        clumns=clumns.substr(1);

        sql+=clumns+" where "+where;
        console.log(sql);
        this.db.query(sql,callback);        
    }

    /*删除*/
    delete:function(tableName,where,callback){
         var sql="delete from "+this.C.DB_PRE+tableName+" where "+where;
        console.log(sql);
        this.db.query(sql,callback);        
    }

/**
*分类模型
*
*/
module.exports={
    getAllList:function(){
        db.select("category",function(err,list){
            console.log(list);
        });
    },
    /*添加*/
    addCate:function(data){
        db.add("category",data,function(err,list){
            console.log(err);
        });
    },
    /*修改*/
    saveCate:function(data,where){
        db.update("category",data,where,function(err,list){
            console.log(err);
        });
    },
    /*删除*/
    delCate:function(where){
        db.delete("category",where,function(err,list){
            //console.log(err);
        });
    }
};

    /*实例化模型*/
    model:function(name){
        return require("../model/"+name);
    }

/**
* 首页控制器
*/
var router=express.Router();
router.get(‘/‘,function(req,res,next){
    F.model("category").getAllList();
    //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;