Javascript 为什么orm函数的返回对象限制为100?
在Node.js项目中,我使用它与Oracle数据库进行通信 在某个时刻,我调用函数Javascript 为什么orm函数的返回对象限制为100?,javascript,node.js,oracle,orm,Javascript,Node.js,Oracle,Orm,在Node.js项目中,我使用它与Oracle数据库进行通信 在某个时刻,我调用函数findAllandCount(),以获取表中的所有记录: ... tipm.findAllandCount(params).then(function (r) { if (r.all > 0) { locals.data.righe = r.rows; console.log("+allRows:", r.all); console.log("+N
findAllandCount()
,以获取表中的所有记录:
...
tipm.findAllandCount(params).then(function (r) {
if (r.all > 0) {
locals.data.righe = r.rows;
console.log("+allRows:", r.all);
console.log("+NumRows:", r.rows.length);
}
...
其中params
是对象:
// var params = { attributes: viewOrder, order: sortOrder, limit: 9999 };
var params = { attributes: viewOrder, order: sortOrder};
如无限制(或限制=9999)中所示,我应该获得表中的所有记录!
相反,我只得到100条记录,正如我从console.log(“+NumRows:”,r.rows.length)
语句中看到的那样
语句console.log(“+allRows:”,r.all)
提供了正确的记录数
我认为问题出在模块的findAllandCount()
函数中,即:
Model.prototype.findAllandCount = function(options){
var pro = Q.defer(), self = this;
var sql_count = 'select count(*) as count from ' + self.table_name;
var sql = 'select * from (select rownum rownum_,t.* from ', start = 0, end = 100;
if(!options){
sql += self.table_name+ ' where rownum <= ' + end ;
}else{
sql += '(';
var _col = '', _tab = '', _where = '';
var makeCTW = function(opt, par_tn){
if(!opt.model ) { pro.reject(ecode.lack_para());return pro.promise;}
var sub_tn = opt.model.table_name;
//make column sql (has ',' last)
if(opt.attributes && opt.attributes.length){
for(var i=0;i<opt.attributes.length;i++){
_col += par_tn? sub_tn+'.'+opt.attributes[i]+' as '+sub_tn+'#'+opt.attributes[i]+',' : sub_tn+'.'+opt.attributes[i]+',';
}
}else{
if(par_tn){
for(var colkey in opt.model.col_def){
_col += sub_tn+'.'+colkey+' as '+sub_tn+'#'+colkey+',';
}
}else
_col += sub_tn+'.*,';
}
//make table sql (has ',' front)
if(opt.notRequired && par_tn){
if(!opt.use||!opt.on){ pro.reject(ecode.lack_para());return pro.promise;}
_tab += ' left join '+sub_tn+' on '+par_tn+'.'+opt.use+'='+sub_tn+'.'+opt.on;
}else{
_tab += ','+sub_tn;
}
//make where sql (has ' and ' last)
if(opt.where){
_where += lib.whereObjToSqlStr(opt.where,opt.model.col_def,sub_tn)+' and ';
}
if(!opt.notRequired && par_tn){
if(!opt.use||!opt.on){
pro.reject(ecode.lack_para());return pro.promise;
}
_where += par_tn+'.'+opt.use+'='+sub_tn+'.'+opt.on+' and ';
}
if(opt.include && opt.include.length){
for(var j= 0; j<opt.include.length; j++) makeCTW(opt.include[j],sub_tn);
}
};
options.model = self;
makeCTW(options);
sql += 'select '+_col.substring(0,_col.length-1)+' from '+_tab.substring(1,_tab.length)+
(_where==''?'':(' where '+_where.substring(0,_where.length-4)))+
') t where rownum<='+end+' ) where rownum_>='+start;
if(options.order){
if(typeof(options.order) == 'string') sql += ' order by '+options.order;
else if(options.order.length){
sql += ' order by ';
for(var i= 0,l= options.order.length;i<l;i++) sql += options.order[i]+',';
sql = sql.substring(0,sql.length-1);
}
}
}
self.orm.getCon().then(function(con){
var _pro = Q.defer();
con.execute(sql_count,{},self.orm.opt,function(e,r){
if(e) _pro.reject({c:con,e:'FindAllandCount count error: '+ e.message});
else _pro.resolve({c:con,r: r.rows[0].COUNT});
});
return _pro.promise;
}).then(function(res){
var con = res.c, count = res.r;
var _pro = Q.defer();
con.execute(sql,{},self.orm.opt,function(e,r){
if(e) _pro.reject({c:con,e:'FindAllandCount select error: '+ e.message});
else _pro.resolve({c:con,r: r.rows.length? r.rows: null, count: count});
});
return _pro.promise;
}).then(function(res){
res.c.release();
if(res.r && res.r.length){
for(var i= 0,l=res.r.length;i<l;i++){
delete res.r[i].ROWNUM_;
for(var k in res.r[i]){
var ks = k.split('#');
if(ks.length ==2 && ks[0] && ks[1]){
if(!res.r[i][ks[0]]) res.r[i][ks[0]] = {};
res.r[i][ks[0]][ks[1]] = res.r[i][k];
delete res.r[i][k];
}
}
}
}
pro.resolve({
all: res.count,
rows: res.r
});
}).catch(function(e){
e.c.release();
pro.reject(ecode.sql_execute(e.e));
});
return pro.promise;
};
Model.prototype.findAllandCount=函数(选项){
var pro=Q.defer(),self=this;
var sql_count='从'+self.table_name'中选择count(*)作为计数;
var sql='select*from(select rownum rownum,t.*from',start=0,end=100;
如果(!选项){
sql+=self.table_name+'其中rownum我认为,这是某种缺陷,因为在函数的代码中没有检查选项“limit”,它们在构建sql请求时使用变量“start”和“end”,并且这些变量没有动态更改,您可以对此进行测试,只需设置“limit”由于一些随机数我检查过,而且库没有更新很多年。它们使用节点OraceBD1.1.1(当前版本为4.0.1)。考虑删除ORM并使用最新版本的驱动程序。请参阅本系列以帮助进行: