使用 gdata-objectivec-client 批量插入电子表格单元格不起作用

Question

我正在尝试使用 GData Objective-C 客户端将一批单元格添加到 Google 电子表格中，如下所述：http://code.google.com/p/gdata-objectivec-client/wiki/GDataObjCIntroduction#Batch_requests。

这是感兴趣的代码：

                      GDataFeedSpreadsheetCell *batchFeed = [GDataFeedSpreadsheetCell spreadsheetCellFeed];
                  NSURL *batchUrl = [[batchFeed batchLink] URL];

                  NSMutableArray *cells = [NSMutableArray array];

                  GDataSpreadsheetCell *cell = [GDataSpreadsheetCell cellWithRow:1 column:1 inputString:@"test" numericValue:nil resultString:nil];

                  GDataEntrySpreadsheetCell *cellEntry = [GDataEntrySpreadsheetCell spreadsheetCellEntryWithCell:cell];
                  [cells addObject:cellEntry];                      
                  [batchFeed setEntries:cells];

                  GDataBatchOperation *op;
                  op = [GDataBatchOperation batchOperationWithType:kGDataBatchOperationInsert];
                  [batchFeed setBatchOperation:op];

                  [service fetchFeedWithBatchFeed:batchFeed forBatchFeedURL:batchUrl completionHandler:nil];

它不起作用。显然， fetchFeedWithBatchFeed 没有引用我的 GDataWorksheetEntry 对象 - 因此它不起作用并不令我感到惊讶。

我遗漏了什么？

提前致谢。

Answer 1

这是最终的答案。

您必须在批量更新之前执行查询以获取要更新的条目。回想起来，这听起来很明显。当然，确实会产生很多嵌套块。

                     NSURL *cellsFeedUrl = [[worksheetEntry cellsLink] URL];

                  GDataQuerySpreadsheet *querySpreadsheet = [GDataQuerySpreadsheet spreadsheetQueryWithFeedURL:cellsFeedUrl];
                  [querySpreadsheet setMinimumRow:1];
                  [querySpreadsheet setMaximumRow:1];
                  [querySpreadsheet setMinimumColumn:1];
                  [querySpreadsheet setMaximumColumn:7];
                  [querySpreadsheet setShouldReturnEmpty:TRUE];

                  [service fetchFeedWithQuery:querySpreadsheet completionHandler:
                   ^(GDataServiceTicket *ticket, GDataFeedBase *feed, NSError *error) {

                       // Update one of these cells as a test.
                       GDataEntrySpreadsheetCell *spreadsheetCellEntry = [[feed entries] lastObject];
                       [[spreadsheetCellEntry cell] setInputString:@"test"];

                       NSArray *updatedEntries = [feed entries];
                       NSString *eTag = feed.ETag;

                       // Get worksheet cells feed
                       [service fetchFeedWithURL:cellsFeedUrl completionHandler:
                        ^(GDataServiceTicket *ticket, GDataFeedBase *feed, NSError *error) {

                            NSURL *batchUrl = [[feed batchLink] URL];
                            GDataFeedSpreadsheetCell *batchFeed = [GDataFeedSpreadsheetCell spreadsheetCellFeed];

                            [batchFeed setEntriesWithEntries:updatedEntries];

                            GDataBatchOperation *op;
                            op = [GDataBatchOperation batchOperationWithType:kGDataBatchOperationUpdate];
                            [batchFeed setBatchOperation:op];
                            [batchFeed setETag:eTag];

                            // Perform batch update
                            [service fetchFeedWithBatchFeed:batchFeed forBatchFeedURL:batchUrl
                                          completionHandler:
                             ^(GDataServiceTicket *ticket, GDataFeedBase *feed, NSError *error) {

                                 // no op

                             }];
                        }];
                   }];

Answer 2

我解决了这个问题并暴露了一个新问题。

首先，解决方案。一旦您有了 GDataWorksheetEntry，此代码将执行批处理操作 - 在本例中为插入：

                      NSURL *cellsFeedUrl = [[worksheetEntry cellsLink] URL];

                  // Get worksheet cells feed
                  [service fetchFeedWithURL:cellsFeedUrl completionHandler:
                   ^(GDataServiceTicket *ticket, GDataFeedBase *feed, NSError *error) {

                       NSURL *batchUrl = [[feed batchLink] URL];
                       GDataFeedSpreadsheetCell *batchFeed = [GDataFeedSpreadsheetCell spreadsheetCellFeed];

                       NSMutableArray *cells = [NSMutableArray array];

                       GDataSpreadsheetCell *cell = [GDataSpreadsheetCell cellWithRow:1 column:1 inputString:@"test" numericValue:nil resultString:nil];

                       GDataEntrySpreadsheetCell *cellEntry = [GDataEntrySpreadsheetCell spreadsheetCellEntryWithCell:cell];

                       static unsigned int staticID = 0;
                       NSString *batchID = [NSString stringWithFormat:@"batchID_%u", ++staticID];
                       [cellEntry setBatchIDWithString:batchID];

                       [cells addObject:cellEntry];                      
                       [batchFeed setEntriesWithEntries:cells];

                       GDataBatchOperation *op;
                       op = [GDataBatchOperation batchOperationWithType:kGDataBatchOperationInsert];
                       [batchFeed setBatchOperation:op];

                       [service fetchFeedWithBatchFeed:batchFeed forBatchFeedURL:batchUrl
                                     completionHandler:
                        ^(GDataServiceTicket *ticket, GDataFeedBase *feed, NSError *error) {

                            NSLog(@"FEED ENTRIES: %@",[feed entries]);
                            NSLog(@"ERROR: %@",error);

                        }];
                   }];

不幸的是，当您访问生成的批处理提要（在日志记录语句中完成）时，您将看到以下内容

FEED ENTRIES: (
"GDataEntrySpreadsheetCell 0x5fcf510: {v:3.0 title:Error content:Insert not supported on batch. id:batchID_2 batchID:batchID_2 batchStatus:501}"

：）

所以现在我需要弄清楚如何解决 Google 缺乏对批量插入支持的问题。

请注意，如果您更改更新操作，您会得到以下结果

FEED ENTRIES: (
"GDataEntrySpreadsheetCell 0xae73880: {v:3.0 title:Error content:Missing entry id id:batchID_2 batchID:batchID_2 batchStatus:400}"

：）

缺少的条目 ID 是因为我创建单元格时没有引用现有单元格 - 因此我将专注于尝试提供该引用并提供批量更新调用，而不是批量插入调用。