static async Task Main(string[] args)
{
using (IDgraphClient client = DgraphDotNet.Clients.NewDgraphClient()) {
client.Connect("127.0.0.1:9080");
await client.AlterSchema(
"Username: string @index(hash) .\n"
+ "Password: password .");
var schemaResult = await client.SchemaQuery();
if (schemaResult.IsFailed)
{
Console.WriteLine($"Something went wrong getting schema.");
return;
}
Console.WriteLine("Queried schema and got :");
foreach (var predicate in schemaResult.Value.Schema)
{
Console.WriteLine(predicate.ToString());
}
while (true)
{
Console.WriteLine("Hi, please enter your new username");
var username = Console.ReadLine();
// use Upsert to test for a node and value, and create if
// not already in the graph as an atomic operation.
var result = await client.Upsert(
"Username",
GraphValue.BuildStringValue(username),
$"{{\"uid\": \"_:myBlank\", \"Username\": \"{username}\"}}",
"myBlank");
if (result.IsFailed)
{
Console.WriteLine("Something went wrong : " + result);
continue;
}
var(node, existed) = result.Value;
if (existed)
{
Console.WriteLine("This user already existed. Try another username.");
continue;
}
Console.WriteLine("Hi, please enter a password for the new user");
var password = Console.ReadLine();
using (var txn = client.NewTransaction()) {
var mutation = txn.NewMutation();
var property = Clients.BuildProperty(node, "Password", GraphValue.BuildPasswordValue(password));
if (property.IsFailed)
{
// ... something went wrong
Console.Write("uhh");
}
else
{
mutation.AddProperty(property.Value);
var err = await mutation.Submit();
if (err.IsFailed)
{
// ... something went wrong
Console.Write(err);
}
}
await txn.Commit();
}
}
}
}