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0

I'm trying to upsert one document into MongoDb. Pretty straightforward but what do I check (beyond the presence of an exception) to know that it failed?

Code:

public async Task<UpdateResult> UpdateDocument<T>(
 string sConnectionString, 
 string sDatabaseName, 
 string sCollectionName, 
 Expression<Func<T, bool>> filter, 
 UpdateDefinition<T> update,
 bool bUpsert,
 System.Threading.CancellationToken cancellationToken
 )

 ConnectToDb(sConnectionString);

 IMongoDatabase db = _mongoClient.GetDatabase(sDatabaseName);

 IMongoCollection<T> collection = db.GetCollection<T>(sCollectionName);

 return await collection.UpdateOneAsync<T>(filter, update, new UpdateOptions() IsUpsert = bUpsert , cancellationToken);


private void ConnectToDb(
 string sConnectionString
 )

 if(sConnectionString != _sConnectionString)
 
 _mongoClient = null;
 _mongoClient = new MongoClient(sConnectionString);

 _sConnectionString = sConnectionString;
 

And then the code that calls it:

try

 MongoDB.Driver.UpdateResult updateResult = await _db.UpdateDocument<Models.NodeBoardModel>(
 _dbSettings._sURLMongoDbConnectionString,
 _dbSettings._sDatabasename, Constants.NodeBoardCollectionName,
 node => node.Id == boardToServerData._request.Id,
 MongoDB.Driver.Builders<Models.NodeBoardModel>.Update.Set(node => node.RemoteBoard, dbboardmodel),
 true,
 stoppingToken
 );

 bool bAcked = updateResult.IsAcknowledged;
 if(updateResult.

catch(AggregateException aggEx)

 Models.Errors errors = null;

 errors = Helpers.ProcessAggregateException(
 aggEx, 
 Models.eError.UPSERTREMOTEBOARD
 );

 _logger.LogError(errors.GetErrorModel()._sSpecificErrorMessage);

catch(Exception ex)

 Models.Errors errors = null;

 errors = Helpers.ProcessException(
 ex, 
 Models.eError.UPSERTREMOTEBOARD
 );

 _logger.LogError(errors.GetErrorModel()._sSpecificErrorMessage);

It looked very simple (just look for the exception) until I saw UpdateResult. With not much context about what to do with it:

http://api.mongodb.com/csharp/current/html/T_MongoDB_Driver_UpdateResult.htm

So even if I don't get an exception could it still have failed? I'm guessing if IsAcknowledged is false then I have failed. Is there a case where failure could have occured when IsAcknowledged is true?

c# mongodb

share|improve this question

asked Mar 25 at 20:40

Timothy John LairdTimothy John Laird

58122 gold badges77 silver badges1515 bronze badges

• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  The point of UpdateResult is to tell you how many documents matched the expression you have and how many were modified as a result ( yes the same result class applies to multi document updates as well ). These numbers can differ considering that there are various conditions where a specified update may not result in any data actually being changed. Even in the case where nothing is matched this is not an error. An error is when something really bad happened. This might be a "network error", or it might be you tried to do something illegal.
  
  – Neil Lunn
  Mar 26 at 7:47
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  Errors of course are raised exceptions. So really you should always be looking at both. 1. The "update result" in order to see you actual matched and possiblly modified what you expected. 2. The "thrown errors" because that is when something actually was an exception. Not matching a document or modifying nothing is simply not an exception. Nor should it be. Your code is responsible for checking things worked as you expected them to.
  
  – Neil Lunn
  Mar 26 at 7:50
  

  
  
  
  

add a comment | 

0

I'm trying to upsert one document into MongoDb. Pretty straightforward but what do I check (beyond the presence of an exception) to know that it failed?

Code:

public async Task<UpdateResult> UpdateDocument<T>(
 string sConnectionString, 
 string sDatabaseName, 
 string sCollectionName, 
 Expression<Func<T, bool>> filter, 
 UpdateDefinition<T> update,
 bool bUpsert,
 System.Threading.CancellationToken cancellationToken
 )

 ConnectToDb(sConnectionString);

 IMongoDatabase db = _mongoClient.GetDatabase(sDatabaseName);

 IMongoCollection<T> collection = db.GetCollection<T>(sCollectionName);

 return await collection.UpdateOneAsync<T>(filter, update, new UpdateOptions() IsUpsert = bUpsert , cancellationToken);


private void ConnectToDb(
 string sConnectionString
 )

 if(sConnectionString != _sConnectionString)
 
 _mongoClient = null;
 _mongoClient = new MongoClient(sConnectionString);

 _sConnectionString = sConnectionString;
 

And then the code that calls it:

try

 MongoDB.Driver.UpdateResult updateResult = await _db.UpdateDocument<Models.NodeBoardModel>(
 _dbSettings._sURLMongoDbConnectionString,
 _dbSettings._sDatabasename, Constants.NodeBoardCollectionName,
 node => node.Id == boardToServerData._request.Id,
 MongoDB.Driver.Builders<Models.NodeBoardModel>.Update.Set(node => node.RemoteBoard, dbboardmodel),
 true,
 stoppingToken
 );

 bool bAcked = updateResult.IsAcknowledged;
 if(updateResult.

catch(AggregateException aggEx)

 Models.Errors errors = null;

 errors = Helpers.ProcessAggregateException(
 aggEx, 
 Models.eError.UPSERTREMOTEBOARD
 );

 _logger.LogError(errors.GetErrorModel()._sSpecificErrorMessage);

catch(Exception ex)

 Models.Errors errors = null;

 errors = Helpers.ProcessException(
 ex, 
 Models.eError.UPSERTREMOTEBOARD
 );

 _logger.LogError(errors.GetErrorModel()._sSpecificErrorMessage);

It looked very simple (just look for the exception) until I saw UpdateResult. With not much context about what to do with it:

http://api.mongodb.com/csharp/current/html/T_MongoDB_Driver_UpdateResult.htm

So even if I don't get an exception could it still have failed? I'm guessing if IsAcknowledged is false then I have failed. Is there a case where failure could have occured when IsAcknowledged is true?

c# mongodb

share|improve this question

asked Mar 25 at 20:40

Timothy John LairdTimothy John Laird

58122 gold badges77 silver badges1515 bronze badges

• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  The point of UpdateResult is to tell you how many documents matched the expression you have and how many were modified as a result ( yes the same result class applies to multi document updates as well ). These numbers can differ considering that there are various conditions where a specified update may not result in any data actually being changed. Even in the case where nothing is matched this is not an error. An error is when something really bad happened. This might be a "network error", or it might be you tried to do something illegal.
  
  – Neil Lunn
  Mar 26 at 7:47
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  Errors of course are raised exceptions. So really you should always be looking at both. 1. The "update result" in order to see you actual matched and possiblly modified what you expected. 2. The "thrown errors" because that is when something actually was an exception. Not matching a document or modifying nothing is simply not an exception. Nor should it be. Your code is responsible for checking things worked as you expected them to.
  
  – Neil Lunn
  Mar 26 at 7:50
  

  
  
  
  

add a comment | 

I'm trying to upsert one document into MongoDb. Pretty straightforward but what do I check (beyond the presence of an exception) to know that it failed?

Code:

public async Task<UpdateResult> UpdateDocument<T>(
 string sConnectionString, 
 string sDatabaseName, 
 string sCollectionName, 
 Expression<Func<T, bool>> filter, 
 UpdateDefinition<T> update,
 bool bUpsert,
 System.Threading.CancellationToken cancellationToken
 )

 ConnectToDb(sConnectionString);

 IMongoDatabase db = _mongoClient.GetDatabase(sDatabaseName);

 IMongoCollection<T> collection = db.GetCollection<T>(sCollectionName);

 return await collection.UpdateOneAsync<T>(filter, update, new UpdateOptions() IsUpsert = bUpsert , cancellationToken);


private void ConnectToDb(
 string sConnectionString
 )

 if(sConnectionString != _sConnectionString)
 
 _mongoClient = null;
 _mongoClient = new MongoClient(sConnectionString);

 _sConnectionString = sConnectionString;
 

And then the code that calls it:

try

 MongoDB.Driver.UpdateResult updateResult = await _db.UpdateDocument<Models.NodeBoardModel>(
 _dbSettings._sURLMongoDbConnectionString,
 _dbSettings._sDatabasename, Constants.NodeBoardCollectionName,
 node => node.Id == boardToServerData._request.Id,
 MongoDB.Driver.Builders<Models.NodeBoardModel>.Update.Set(node => node.RemoteBoard, dbboardmodel),
 true,
 stoppingToken
 );

 bool bAcked = updateResult.IsAcknowledged;
 if(updateResult.

catch(AggregateException aggEx)

 Models.Errors errors = null;

 errors = Helpers.ProcessAggregateException(
 aggEx, 
 Models.eError.UPSERTREMOTEBOARD
 );

 _logger.LogError(errors.GetErrorModel()._sSpecificErrorMessage);

catch(Exception ex)

 Models.Errors errors = null;

 errors = Helpers.ProcessException(
 ex, 
 Models.eError.UPSERTREMOTEBOARD
 );

 _logger.LogError(errors.GetErrorModel()._sSpecificErrorMessage);

It looked very simple (just look for the exception) until I saw UpdateResult. With not much context about what to do with it:

http://api.mongodb.com/csharp/current/html/T_MongoDB_Driver_UpdateResult.htm

So even if I don't get an exception could it still have failed? I'm guessing if IsAcknowledged is false then I have failed. Is there a case where failure could have occured when IsAcknowledged is true?

c# mongodb

share|improve this question

asked Mar 25 at 20:40

Timothy John LairdTimothy John Laird

58122 gold badges77 silver badges1515 bronze badges

public async Task<UpdateResult> UpdateDocument<T>(
 string sConnectionString, 
 string sDatabaseName, 
 string sCollectionName, 
 Expression<Func<T, bool>> filter, 
 UpdateDefinition<T> update,
 bool bUpsert,
 System.Threading.CancellationToken cancellationToken
 )

 ConnectToDb(sConnectionString);

 IMongoDatabase db = _mongoClient.GetDatabase(sDatabaseName);

 IMongoCollection<T> collection = db.GetCollection<T>(sCollectionName);

 return await collection.UpdateOneAsync<T>(filter, update, new UpdateOptions() IsUpsert = bUpsert , cancellationToken);


private void ConnectToDb(
 string sConnectionString
 )

 if(sConnectionString != _sConnectionString)
 
 _mongoClient = null;
 _mongoClient = new MongoClient(sConnectionString);

 _sConnectionString = sConnectionString;
 

try

 MongoDB.Driver.UpdateResult updateResult = await _db.UpdateDocument<Models.NodeBoardModel>(
 _dbSettings._sURLMongoDbConnectionString,
 _dbSettings._sDatabasename, Constants.NodeBoardCollectionName,
 node => node.Id == boardToServerData._request.Id,
 MongoDB.Driver.Builders<Models.NodeBoardModel>.Update.Set(node => node.RemoteBoard, dbboardmodel),
 true,
 stoppingToken
 );

 bool bAcked = updateResult.IsAcknowledged;
 if(updateResult.

catch(AggregateException aggEx)

 Models.Errors errors = null;

 errors = Helpers.ProcessAggregateException(
 aggEx, 
 Models.eError.UPSERTREMOTEBOARD
 );

 _logger.LogError(errors.GetErrorModel()._sSpecificErrorMessage);

catch(Exception ex)

 Models.Errors errors = null;

 errors = Helpers.ProcessException(
 ex, 
 Models.eError.UPSERTREMOTEBOARD
 );

 _logger.LogError(errors.GetErrorModel()._sSpecificErrorMessage);

share|improve this question

asked Mar 25 at 20:40

Timothy John LairdTimothy John Laird

58122 gold badges77 silver badges1515 bronze badges

share|improve this question

asked Mar 25 at 20:40

Timothy John LairdTimothy John Laird

58122 gold badges77 silver badges1515 bronze badges

asked Mar 25 at 20:40

Timothy John LairdTimothy John Laird

58122 gold badges77 silver badges1515 bronze badges

asked Mar 25 at 20:40

Timothy John LairdTimothy John Laird

58122 gold badges77 silver badges1515 bronze badges