nodejs个人博客开发第四步数据模型

 /*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;