Transactions in GraphQL

[arijit (Arijit Das)]

@michaelcompton

• There was also a request to run a block of mutations as a single transaction and roll back if any failed here - currently we run each in a transaction
• If we aren’t exposing Dgraph or GraphQL± at all in Slash GraphQL, then you really do need transactions sometimes, so we’d need to expose that through GraphQL.

Updated the post. Case 2 will cover the first case and Case 3 will cover both of them.