Cypher Query Issues Neo4j C# Client - neo4jclient

Question

I am getting an error on the following code that says:
Here is the code, I need this method to return the Max Value? is it an IEnumerable or an int?
public IEnumerable<int> GraphGetMaxVersion(IEnumerable<Node<VersionNode>> nodeId)
{
IEnumerable<int> nodes = null;
clientConnection = graphOperations.GraphGetConnection();
var query = clientConnection
.Cypher
.Start(new
{
n = nodeId
})
.Return((maxVersion) => new
{
MaxVersion = Return.As<int>("max.Version")
});
nodes = query.Results;
return nodes;
}
Here is the query I would like to perform:
START n=node(2,3,4)
RETURN max(n.property)

Answer 1

You want this:
public int GraphGetMaxVersion(IEnumerable<NodeReference<VersionNode>> nodes)
{
return graphClient.Cypher
.Start(new { n = nodes })
.Return(() => Return.As<int>("max(n.Version)"))
.Results
.Single();
}
I haven't tested that. I just bashed it out here in the textbox, but it should work.
If you don't need to return a complex type, don't. That is, turn Return(() => new { Foo = All.Count() }) into Return(() => All.Count()).
If you don't need to use an identity in your return lambda, don't pass it in. That is, this argument is pointless: Return((somePointlessIdentityHere) => All.Count())
Use either Neo4jClient 1.0.0.570 or above, or change .Start(new { n = nodes }) to .Start(new { n = nodes.ToArray() }).

Answer 2

You should so the following:
// Return Max follwoer node ID:
public float ReturnMaxFollowerID(IGraphClient Client)
{
return Client.Cypher
.Match("(n:User)")
.Return(() => Return.As<float>("max(n.userID)"))
.Results
.Single();
}

Answer 3

No errors are thrown when I made these changes to the method after reading this post.
public int GraphGetMaxVersion(int nodeId)
{
int nodes = 0;
clientConnection = graphOperations.GraphGetConnection();
var query = clientConnection
.Cypher
.Start(new
{
n = nodeId
})
.Return((maxVersion) => new
{
MaxVersion = Return.As<int>("max(n.Version)")
})
.Results
.Single();
nodes = query.MaxVersion;
return nodes;
}