Example datastore mark task done

  /// <summary> 
 /// Marks a task entity as done. 
 /// </summary> 
 /// <param name="id">The ID of the task entity as given by Key.</param> 
 /// <returns>true if the task was found.</returns> 
 bool 
  
 MarkDone 
 ( 
 long 
  
 id 
 ) 
 { 
  
 using 
  
 ( 
 var 
  
 transaction 
  
 = 
  
 _db 
 . 
 BeginTransaction 
 ()) 
  
 { 
  
 Entity 
  
 task 
  
 = 
  
 transaction 
 . 
 Lookup 
 ( 
 _keyFactory 
 . 
 CreateKey 
 ( 
 id 
 )); 
  
 if 
  
 ( 
 task 
  
 != 
  
 null 
 ) 
  
 { 
  
 task 
 [ 
 "done" 
 ] 
  
 = 
  
 true 
 ; 
  
 transaction 
 . 
 Update 
 ( 
 task 
 ); 
  
 } 
  
 transaction 
 . 
 Commit 
 (); 
  
 return 
  
 task 
  
 != 
  
 null 
 ; 
  
 } 
 } 
 

  import 
  
 ( 
  
 "context" 
  
 "log" 
  
 "cloud.google.com/go/datastore" 
 ) 
 // MarkDone marks the task done with the given ID. 
 func 
  
 MarkDone 
 ( 
 projectID 
  
 string 
 , 
  
 taskID 
  
 int64 
 ) 
  
 error 
  
 { 
  
 ctx 
  
 := 
  
 context 
 . 
 Background 
 () 
  
 client 
 , 
  
 err 
  
 := 
  
 datastore 
 . 
  NewClient 
 
 ( 
 ctx 
 , 
  
 projectID 
 ) 
  
 if 
  
 err 
  
 != 
  
 nil 
  
 { 
  
 log 
 . 
 Fatalf 
 ( 
 "Could not create datastore client: %v" 
 , 
  
 err 
 ) 
  
 } 
  
 defer 
  
 client 
 . 
 Close 
 () 
  
 // Create a key using the given integer ID. 
  
 key 
  
 := 
  
 datastore 
 . 
  IDKey 
 
 ( 
 "Task" 
 , 
  
 taskID 
 , 
  
 nil 
 ) 
  
 // In a transaction load each task, set done to true and store. 
  
 _ 
 , 
  
 err 
  
 = 
  
 client 
 . 
  RunInTransaction 
 
 ( 
 ctx 
 , 
  
 func 
 ( 
 tx 
  
 * 
 datastore 
 . 
 Transaction 
 ) 
  
 error 
  
 { 
  
 var 
  
 task 
  
 Task 
  
 if 
  
 err 
  
 := 
  
 tx 
 . 
 Get 
 ( 
 key 
 , 
  
& task 
 ); 
  
 err 
  
 != 
  
 nil 
  
 { 
  
 return 
  
 err 
  
 } 
  
 task 
 . 
 Done 
  
 = 
  
 true 
  
 _ 
 , 
  
 err 
  
 := 
  
 tx 
 . 
 Put 
 ( 
 key 
 , 
  
& task 
 ) 
  
 return 
  
 err 
  
 }) 
  
 return 
  
 err 
 } 
 

  /** 
 * Marks a task entity as done. 
 * 
 * @param id The ID of the task entity as given by {@link Key#id()} 
 * @return true if the task was found, false if not 
 * @throws DatastoreException if the transaction fails 
 */ 
 boolean 
  
 markDone 
 ( 
 long 
  
 id 
 ) 
  
 { 
  
 Transaction 
  
 transaction 
  
 = 
  
 datastore 
 . 
 newTransaction 
 (); 
  
 try 
  
 { 
  
 Entity 
  
 task 
  
 = 
  
 transaction 
 . 
 get 
 ( 
 keyFactory 
 . 
 newKey 
 ( 
 id 
 )); 
  
 if 
  
 ( 
 task 
  
 != 
  
 null 
 ) 
  
 { 
  
 transaction 
 . 
 put 
 ( 
 Entity 
 . 
 newBuilder 
 ( 
 task 
 ). 
 set 
 ( 
 "done" 
 , 
  
 true 
 ). 
 build 
 ()); 
  
 } 
  
 transaction 
 . 
 commit 
 (); 
  
 return 
  
 task 
  
 != 
  
 null 
 ; 
  
 } 
  
 finally 
  
 { 
  
 if 
  
 ( 
 transaction 
 . 
 isActive 
 ()) 
  
 { 
  
 transaction 
 . 
 rollback 
 (); 
  
 } 
  
 } 
 } 
 

  async 
  
 function 
  
 markDone 
 ( 
 taskId 
 ) 
  
 { 
  
 const 
  
 transaction 
  
 = 
  
 datastore 
 . 
 transaction 
 (); 
  
 const 
  
 taskKey 
  
 = 
  
 datastore 
 . 
 key 
 ([ 
 'Task' 
 , 
  
 datastore 
 . 
 int 
 ( 
 taskId 
 )]); 
  
 try 
  
 { 
  
 await 
  
 transaction 
 . 
 run 
 (); 
  
 const 
  
 [ 
 task 
 ] 
  
 = 
  
 await 
  
 transaction 
 . 
 get 
 ( 
 taskKey 
 ); 
  
 task 
 . 
 done 
  
 = 
  
 true 
 ; 
  
 transaction 
 . 
 save 
 ({ 
  
 key 
 : 
  
 taskKey 
 , 
  
 data 
 : 
  
 task 
 , 
  
 }); 
  
 await 
  
 transaction 
 . 
 commit 
 (); 
  
 console 
 . 
 log 
 ( 
 `Task 
 ${ 
 taskId 
 } 
 updated successfully.` 
 ); 
  
 } 
  
 catch 
  
 ( 
 err 
 ) 
  
 { 
  
 await 
  
 transaction 
 . 
 rollback 
 (); 
  
 } 
 } 
 

  use Google\Cloud\Datastore\DatastoreClient; 
 /** 
 * Mark a task with a given id as done. 
 * 
 * @param string $projectId The Google Cloud project ID. 
 * @param string $taskId 
 */ 
 function mark_done(string $projectId, string $taskId) 
 { 
 $datastore = new DatastoreClient(['projectId' => $projectId]); 
 $taskKey = $datastore->key('Task', $taskId); 
 $transaction = $datastore->transaction(); 
 $task = $transaction->lookup($taskKey); 
 $task['done'] = true; 
 $transaction->upsert($task); 
 $transaction->commit(); 
 printf('Task %d updated successfully.' . PHP_EOL, $taskId); 
 } 
 

  from 
  
 google.cloud 
  
 import 
  datastore 
 
 def 
  
 mark_done 
 ( 
 client 
 : 
  datastore 
 
 . 
  Client 
 
 , 
 task_id 
 : 
 str 
 | 
 int 
 ): 
 with 
 client 
 . 
  transaction 
 
 (): 
 # Create a key for an entity of kind "Task", and with the supplied 
 # `task_id` as its Id 
 key 
 = 
 client 
 . 
  key 
 
 ( 
 "Task" 
 , 
 task_id 
 ) 
 # Use that key to load the entity 
 task 
 = 
 client 
 . 
  get 
 
 ( 
 key 
 ) 
 if 
 not 
 task 
 : 
 raise 
 ValueError 
 ( 
 f 
 "Task 
 { 
 task_id 
 } 
 does not exist." 
 ) 
 # Update a field indicating that the associated 
 # work has been completed 
 task 
 [ 
 "done" 
 ] 
 = 
 True 
 # Persist the change back to Datastore 
 client 
 . 
  put 
 
 ( 
 task 
 ) 
 

  def 
  
 mark_done 
  
 task_id 
  
 require 
  
 "google/cloud/datastore" 
  
 datastore 
  
 = 
  
 Google 
 :: 
 Cloud 
 :: 
  Datastore 
 
 . 
  new 
 
  
 task 
  
 = 
  
 datastore 
 . 
 find 
  
 "Task" 
 , 
  
 task_id 
  
 task 
 [ 
 "done" 
 ] 
  
 = 
  
 true 
  
 datastore 
 . 
 save 
  
 task 
 end