WeChat small program to determine whether the collection contains an element-CodePudding

Form to enter a number, to determine whether a number in the cloud database collection?

CodePudding user response:

You can use indexOf

CodePudding user response:

references reply 1/f, cc:

can use indexOf

bb you?? ?

CodePudding user response:

Command. The exists

 
Mand const _=db.com 
Db. Collection (' todos.) where ({
Tags: _ the exists (true) 
}) 
.get ({
Success: the console log, 
Fail: the console. The error 
})

See documentation: https://developers.weixin.qq.com/miniprogram/dev/wxcloud/reference-sdk-api/database/command/Command.exists.html