Rxswift self problem

rechargeBtn.rx.tap.flatMapLatest({ [weak self] _ in
//            switch (self!.payTableDataSrouce[self!.seletedIndex].payMethod) {
//            case .wx:
//                print("wx")
//            case .ali:
//
//            }
            return AliPayApi.provider.requestAPI(.getRechargeFeeOrder(amount: Float(self!.moneyInput.text!)!, employeeId: "09")).mapMoyeResponseString()
        })
        
        self

report an error. What"s the problem?

Objective-c ios swift

Oct.20,2021

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MySQL Query : SELECT * FROM `codeshelper`.`v9_news` WHERE status=99 AND catid='6' ORDER BY rand() LIMIT 5
MySQL Error : Disk full (/tmp/#sql-temptable-64f5-1e3ca16-446c7.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
MySQL Errno : 1021
Message : Disk full (/tmp/#sql-temptable-64f5-1e3ca16-446c7.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
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