Subject: RE: Help!: Can’t save value on QuerySave event by LS
You can’t do a front-end save inside the querysave because it leads to infinite regress. The attempt to save will cause another call to querysave before you finished the first one.
AppendItemValue is not a good method to call in Querysave code. Please read the documentation. The new item you just created this way is not accessible because there’s already another item called member_list.
You didn’t say what you were trying to do, so I can’t tell you how to do it right. But if this is all the code you have, it’s almost certainly going to be easier to use a formula. E.g. you might just need to make the Allow_reader field computed with the following formula: @trim(member_list : “[Super_User]”).