無法在輪渡查詢中使用 flutter DateTime

Question

這是查詢

query UpcomingPendingEvents($attendantId: ID, $eventDateTimeGt: DateTime) {
    attendances(attendant_Id: $attendantId, attending: "0",
        event_Datetime_Gt: $eventDateTimeGt, first: 10,) {
        # some fields here
    }
}

我收到錯誤A value of type 'DateTime' can't be assigned to a variable of type 'GDateTimeBuilder?' 當我使用以下查詢時

gqlClient.request(GUpcomingPendingEventsReq(
            (b) => b
            ..vars.attendantId = attendantId
            ..vars.eventDateTimeGt = DateTime.parse('2021-12-15T17:00:00'),
    ));

當我嘗試那樣使用它時。

gqlClient.request(GUpcomingPendingEventsReq(
            (b) => b
            ..vars.attendantId = attendantId
            ..vars.eventDateTimeGt = DateTime.parse('2021-12-15T17:00:00') as GDateTimeBuilder?,
    ));

我收到運行時錯誤type 'DateTime' is not a subtype of type 'GDateTimeBuilder?' in type cast type 'DateTime' is not a subtype of type 'GDateTimeBuilder?' in type cast 。

Answer 1

我認為您需要將其分配給GDateTimeBuilder上的value 。

 ...
 (b) => b
 ..vars.attendantId = attendantId
 ..vars.eventDateTimeGt.value = '2021-12-15T17:00:00' // <-- here
 ...