A .Net API for the Neo4j HTTP Transactional Endpoint. (v2.0.0)
Exposes strongly typed Graph Query API based on the Neo4j Cypher Query Language.
- Usage
var nodes = cypherEndpoint .BeginQuery(p => new {person = p.Node, rel = p.Rel, role = p.Node}) // Define query variables .Start(ctx => ctx.StartAtAny(ctx.Vars.person)) // Cypher START clause .Match(ctx => ctx.Node(ctx.Vars.person).Outgoing(ctx.Vars.rel).To(ctx.Vars.role)) // Cypher MATCH clause .Where(ctx => ctx.Prop(ctx.Vars.person, "name!") == "mark" && ctx.Prop(ctx.Vars.role, "title!") == "developer") // Cypher WHERE predicate .Return(ctx => new { Person = ctx.Vars.person, Rel = ctx.Vars.rel, Role = ctx.Vars.role }) // Cypher RETURN clause .Fetch(); // GO!
/* Executes Cypher:
- START person:node(*)
- MATCH (person)-[rel]->(role)
- WHERE person.name! = 'mark' AND role.title! = 'developer'
- RETURN person as Person, rel as Rel, role as ROle */
Assert.IsTrue(nodes.Any());
foreach (var node in nodes) { dynamic start = node.Person; // Nodes & Relationships are dynamic types dynamic end = node.Role; Assert.AreEqual("mark", start.name); Assert.AreEqual("developer", end.title); Console.WriteLine(String.Format("{0} {1} {2}", start.name, node.Rel.Type, end.title)); // Prints "mark IS_A developer" }
<dl>
<dt>Transactional</dt>
<dd></dd>
</dl>
```C#
var clientFactory = Fluently.Configure("http://localhost:7474/db/data/").CreateSessionFactory();
var cypherEndpoint = clientFactory.Create();
Node node1, node2;
using (var trans1 = new TransactionScope(TransactionScopeOption.RequiresNew, TimeSpan.FromDays(1)))
{
node1 = cypherEndpoint.CreateNode(new {name = "test node1"});
using (var trans2 = new TransactionScope(TransactionScopeOption.RequiresNew))
{
node2 = cypherEndpoint.CreateNode(new {name = "test node2"});
trans2.Complete();
}
}
var node1Query = cypherEndpoint.BeginQuery(s => new {node1 = s.Node})
.Start(ctx => ctx.StartAtId(ctx.Vars.node1, node1.Id))
.Return(ctx => new {ctx.Vars.node1})
.Fetch()
.FirstOrDefault();
var node2Query = cypherEndpoint.BeginQuery(s => new {node2 = s.Node})
.Start(ctx => ctx.StartAtId(ctx.Vars.node2, node2.Id))
.Return(ctx => new { ctx.Vars.node2 })
.Fetch()
.FirstOrDefault();
Assert.IsNull(node1Query);
Assert.IsNotNull(node2Query);
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