Question

我正在尝试更新列表项（类型是“超链接”或“图片”）上的值。当执行GET请求时，数据返回正常，但是当我尝试创建一个项目或使用该值对它进行udpate时，结果如下：

{
    "error": {
        "code": "-1, Microsoft.SharePoint.Client.InvalidClientQueryException",
        "message": "A value without a type name was found and no expected type is available. When the model is specified, each value in the payload must have a type which can be either specified in the payload, explicitly by the caller or implicitly inferred from the parent value.",
        "innerError": {
            "request-id": "d12dfb12-a068-4621-9f27-d284e4635060",
            "date": "2019-05-28T08:52:51"
        }
    }
}

POST / PATCH请求转到：

https://graph.microsoft.com/v1.0/sites/<siteid>/lists/<listid>/items/

并包含一个简单的JSON（对于PATCH）：

{
  "WebPage":
  {
    "Description": "Microsoft Graph",
    "Url": "http://graph.microsoft.com"
  }
}

知道我在做什么错吗？我尝试使用.NET SDK和Graph Explorer，但以相同的错误结束...

Answer 1

要更新列表中的项目，您需要提供ID作为URI的一部分，它应如下所示：

 func setUpFetchedResultsViewController() {
           let fetchRequest: NSFetchRequest<FlickrImage> = FlickrImage.fetchRequest()
           let sortDescriptor = NSSortDescriptor(key: "photo", ascending: true)
        let predicate = NSPredicate(format: "locations == %@", location)
        fetchRequest.predicate = predicate
           fetchRequest.sortDescriptors = [sortDescriptor]
        fetchResultController = NSFetchedResultsController(fetchRequest: fetchRequest, managedObjectContext: dataController.viewContext, sectionNameKeyPath: nil, cacheName: nil)
        
           fetchResultController.delegate = self
           do {
               try fetchResultController.performFetch()
           } catch {
               print(error.localizedDescription)
           }
        checkForImages()
    }


@objc func fetchNewItems() {
        let imagesInFlickr = fetchResultController.fetchedObjects!
        let indexPath = IndexPath(row: 0, section: 0)
           for image in imagesInFlickr {
            dataController.viewContext.delete(image)
            photoCollection.deleteItems(at: [indexPath])
            try? dataController.viewContext.save()
           }
           //The function below downloads new images and saves into core data.
           downloadImageDetailsFromFlickr() 
           self.photoCollection.reloadData()
    }

func checkForImages() {
     if fetchResultController.fetchedObjects!.count == 0 {
        downloadImageDetailsFromFlickr()
        try? fetchResultController.performFetch()
        photoCollection.reloadData()
     } else {
        try? fetchResultController.performFetch()
        photoCollection.reloadData()
        }
    }

func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell {
           let cell = collectionView.dequeueReusableCell(withReuseIdentifier: "collectionCell", for: indexPath) as! collectionCell
            let image = fetchResultController.object(at: indexPath)
                if let cellImage = image.photo {
                      DispatchQueue.main.async {
                           cell.imageView.image = UIImage(data: cellImage)
                      }
        }
        return cell
    }

 func collectionView(_ collectionView: UICollectionView, didSelectItemAt indexPath: IndexPath) {
            let cell = collectionView.dequeueReusableCell(withReuseIdentifier: "collectionCell", for: indexPath) as! collectionCell
           
           if cell.isSelected {
               let alertVC = UIAlertController(title: .none, message: .none, preferredStyle: .actionSheet)
               alertVC.addAction(UIAlertAction(title: "Cancel", style: .cancel, handler: nil))
               alertVC.addAction(UIAlertAction(title: "Delete", style: .destructive, handler: { (_) in
                   let image = self.fetchResultController.object(at: indexPath)
                   self.dataController.viewContext.delete(image)
                do {
                   try self.dataController.viewContext.save()
                    try self.fetchResultController.performFetch()
                } catch {
                    print(error.localizedDescription)
                }
                DispatchQueue.main.async {
                    self.photoCollection.deleteItems(at: [indexPath])
                    self.photoCollection.reloadData()
                }
               }))
               present(alertVC, animated: true, completion: nil)
           }
       }

您遇到的错误是尝试使用Graph无法与该集合协调的对象更新集合时返回的错误。

无法通过Microsoft Graph更新SharePoint中的超链接或图片

1 个答案: