internal async Task <FluentResults.Result <IDictionary <string, string> > > Mutate(Api.Mutation mutation)
{
AssertNotDisposed();
if (TransactionState != TransactionState.OK)
{
return(Results.Fail <IDictionary <string, string> >(new TransactionFinished(TransactionState.ToString())));
}
if (mutation.Del.Count == 0 &&
mutation.DeleteJson.Length == 0 &&
mutation.Set.Count == 0 &&
mutation.SetJson.Length == 0)
{
return(Results.Ok <IDictionary <string, string> >(new Dictionary <string, string>()));
}
HasMutated = true;
try {
Api.Request req = new Api.Request();
req.Mutations.Add(mutation);
req.StartTs = Context.StartTs;
var response = await Client.Mutate(req);
if (mutation.CommitNow)
{
TransactionState = TransactionState.Committed;
}
var err = MergeContext(response.Txn);
if (err.IsFailed)
{
return(err.ToResult <IDictionary <string, string> >());
}
return(Results.Ok <IDictionary <string, string> >(response.Uids));
} catch (RpcException rpcEx) {
// From Dgraph code txn.go
//
// Since a mutation error occurred, the txn should no longer be used
// (some mutations could have applied but not others, but we don't know
// which ones). Discarding the transaction enforces that the user
// cannot use the txn further.
await Discard(); // Ignore error - user should see the original error.
TransactionState = TransactionState.Error; // overwrite the aborted value
return(Results.Fail <IDictionary <string, string> >(new FluentResults.ExceptionalError(rpcEx)));
}
}
