CODEWITHSUNDEEP
c#neo4jneo4jclient
Baub
Baub

Reputation: 751

Syntax error passing query through neo4jclient

I have some code that I got from cypher examples which I modified to try and make it simpler to make it work. The other reason I want to modify it is because I am trying to capture some sort of result to ensure the operation succeeded or failed, or ???. So far I haven't been able to figure that out, so that is one question. The other question is with the code below, I realize it's ugly but it's not working yet and I'll clean it when it's working.

var newUser = new {Id = model.Password.ToString(), Name = model.UserName.ToString() };

var mee = client.Cypher
                        .Create("(user:Name {newUser})")
                        .WithParam("newUser", newUser);

                    mee.ToString();

This failed to insert a record but didn't cause an exception in the try catch it is in. The mee variable has the query, which I can see why it failed but can't figure out how to fix it.

mee = CREATE (user:Name { Id = 'aaaaaa', Name = 'ab' })

For the query, the equal (=) sign needs to be a colon (:). With that, the query should work. Second question, any way to achieve that?

Upvotes: 0

Views: 120

Answers (1)

Tatham Oddie
Tatham Oddie

Reputation: 4290

It looks like you aren't calling .ExecuteWithoutResults() or .Results, so nothing will ever actually go to Neo4j.

Look at the full example that you linked to:

var newUser = new User { Id = 456, Name = "Jim" };
graphClient.Cypher
    .Create("(user:User {newUser})")
    .WithParam("newUser", newUser)
    .ExecuteWithoutResults();

If you want to return something, then you need to include that in your Cypher call with a RETURN clause, and then look at the Results property:

var newUser = new User { Id = 456, Name = "Jim" };
var createdUser = graphClient.Cypher
    .Create("(user:User {newUser})")
    .WithParam("newUser", newUser)
    .Return(user => user.As<User>)
    .Results
    .SingleOrDefault();

In this specific example though, that is totally pointless because you will always just return the same node you created.

As for the = vs :, that's just a difference of QueryText vs. DebugQueryText. Look at QueryText, because that's the one that actually goes over the wire in the end.

Upvotes: 2

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