下述为Bmob的修改特定数据行的官方文档代码:
const query = Bmob.Query('tableName');
query.get('objectId').then(res => {
console.log(res)
res.set('cover','3333')
res.save()
}).catch(err => {
console.log(err)
})
下述为所写的循环检验是否修改的代码:
const query = Bmob.Query('del');
query.equalTo("nickName", "==", app.globalData.userInfo.nickName),
query.equalTo("type", "==",0);
query.find().then(res => {
//var incomeList=this.data.incomeList;
for (var i = 0; i <res.length; i++){
console.log("遍历",res[i].idnum)
console.log("现删",this.data.delnum)
if(res[i].idnum>this.data.delnum)
{
console.log("do")
query.get(res[i].objectId).then(t => {
t.set('idnum','t.idnum-1')
t.save()
console.log("&&",res[i].idnum)
}).catch(err => {
console.log(err)
})
}
已检查循环和if语句应该都无问题,可能是t.set出了问题,报错信息为:
TypeError: Cannot read property 'idnum' of undefined
数据库内容为:
{createdAt: "2020-08-15 23:52:43", idnum: "9",......}
{........}