WCTExpr每次二元操作之后都会自动加个括号，怎么搞？

[CodeSlaveZhang]

The language of WCDB

Objective-C

The version of WCDB

v1.0.5

The platform of WCDB

iOS, macOS

The installation of WCDB

Git clone

What's the issue?

WCTExpr每次二元操作之后都会自动加个括号，怎么搞？

` WCTCondition condition = KIMMessageDBObj.msg_client_id.isNotNull();

if (option.fromMessage) {

    condition = condition && KIMMessageDBObj.convo_seq_id<option.fromMessage.seqInSession;

}

if (option.toMessage) {

    condition = condition && KIMMessageDBObj.convo_seq_id>option.toMessage.seqInSession;

}

if (option.atType!=KIMMessageAtTypeUnknown) {

    condition = condition && KIMMessageDBObj.at_type==option.atType;

}

if (option.messageTypes.count) {

    condition = condition &&KIMMessageDBObj.msg_type.in(option.messageTypes);

}

`

这样每次二元操作都会自动带个括号