Question

有几天我试图破解为什么我的代码无法正常工作，而且我尝试的所有内容都没有给我任何结果。继承人：有一个Booking类，其中包含进行预订的userFrom

let query = PFQuery(className: "Booking")
        query.whereKey("offer", equalTo: offer.pfObject!)
        if self.typeOfUser == .COOK { //! If user is a Cook
            query.findObjectsInBackgroundWithBlock({ (objects : [PFObject]?, error : NSError?) -> Void in
                if let error = error {
                    print(error.localizedDescription)
                } else {
                    if let objects = objects {
                        self.bookings = objects
                        self.usersIds = [String]()
                        for object in objects {
                            let userFrom = object.objectForKey("userFrom") as? PFObject
                            let userId = userFrom!.objectId! as String
                            self.usersIds.append(userId)
                        }
                        self.getUserInfoForBooking()

                    } else {
                        print("Something went wrong")
                    }
                }
            })
        }

我从每个用户获得objectId并将其附加到[String]数组。然后我用他们的ID查询用户

    private func getUserInfoForBooking() {
    let userQuery = PFQuery(className: "User")
    userQuery.whereKey("objectId", containedIn: self.usersIds)
    userQuery.findObjectsInBackgroundWithBlock({ (objects : [PFObject]?, error : NSError?) -> Void in
        if let error = error {
            print(error.localizedDescription)
        } else {
            print(objects!)
            if let objects = objects {
                for object in objects {
                    self.users.append(object)
                }
                self.collectionView.reloadData()
            } 
        }
    })
}

在这个查询中，我总是得到一个空数组。无论我做了什么，无论我改变了什么总是[]回应:(

Answer 1

这是查询用户的错误方法

let userQuery = PFQuery(className: "User")

因为类名是私有的。您应该将查询创建为

let userQuery = PFUser.query()

Parse查询containsIn不返回任何值

1 个答案: