Slave Connections

[MrParano1d]

Will you gonna implement slave connections in the near future?

I always recieve a

 MongoDart Error: No master connection 
#0      _ConnectionManager.masterConnectionVerified (package:mongo_dart/src/network/connection_manager.dart:18:7)
#1      Db._masterConnectionVerified (package:mongo_dart/src/database/db.dart:126:26)

even with this DbCommand

return new DbCommand(
        db,
        DbCommand.SYSTEM_COMMAND_COLLECTION,
        MongoQueryMessage.OPTS_NO_CURSOR_TIMEOUT | MongoQueryMessage.OPTS_SLAVE,
        0,
        -1,
        {
          'aggregate': collection.collectionName,
          'pipeline': pipeline,
          'cursor': cursorOptions,
          'allowDiskUse': this.allowDiskUse
        },
        null);
  }

Without this feature we have to stop our dart experiment. :(
Am I missing something?
Why do you force a master connection?

[thosakwe]

What kind of functionality are you expecting? I'm wondering what an implementation might look like.

[MrParano1d]

I'm trying to connect to a mongodb that is secondary and not primary. But this library always depends on a master(primary) connection.

I removed this if: https://github.com/mongo-dart/mongo_dart/blob/master/lib/src/network/connection_manager.dart#L29
locally and then I could connect to our secondary mongodb server.

I would like to have some sort of read preferences (https://docs.mongodb.com/manual/core/read-preference/) or slaveOk (https://docs.mongodb.com/manual/reference/method/rs.slaveOk/).

I hope you know what I mean.

[sstinger]

I noticed the same problem and also commented out the lines.
Now I can handel the Unhandled exception "Not primary while writing" in my code.
I have to handle the exception anyway.

I think the only way would be to set a bool allowSecondaryRead on db open and if true to disallow all write function and throw an no primary exeption or something else.

[metatecnologia-mpro]

I'm also having the same problem, has anyone been able to solve it?