/// <summary>
/// MATCH(a),(b)
/// WHERE ID(a) = $fromNodeId AND ID(b) = $toNodeId
/// CREATE (a)-[r: $relType $variables ]->(b)
/// </summary>
/// <param name="fromNodeId"></param>
/// <param name="toNodeId"></param>
/// <param name="relType"></param>
/// <param name="variables"></param>
public void Relate(PendingNode fromNodeId, PendingNode toNodeId, Model.MEPEdgeTypes relType, Dictionary <string, object> variables)
{
var qlSafeVariables = new Dictionary <string, object>();
if (variables != null)
{
foreach (var kvp in variables)
{
var qlSafeName = Utils.GetGraphQLCompatibleFieldName(kvp.Key);
if (!qlSafeVariables.ContainsKey(qlSafeName))
{
qlSafeVariables.Add(qlSafeName, kvp.Value);
}
}
}
Dictionary <string, object> props = new Dictionary <string, object>();
props.Add("frid", fromNodeId.TempId);
props.Add("toid", toNodeId.TempId);
string query = string.Empty;
if (qlSafeVariables != null && qlSafeVariables.Count > 0)
{
props.Add("cvar", qlSafeVariables);
query =
string.Format("MATCH(a: {0} {{TempId: $frid}}),(b:{1} {{TempId: $toid}})", fromNodeId.NodeName, toNodeId.NodeName) +
string.Format("CREATE (a)-[r:{0} $cvar]->(b) ", relType);
}
else
{
query =
string.Format("MATCH(a: {0} {{TempId: $frid}}),(b:{1} {{TempId: $toid}})", fromNodeId.NodeName, toNodeId.NodeName) +
string.Format("CREATE (a)-[r:{0}]->(b) ", relType);
}
var pec = new PendingCypher();
pec.Query = query;
pec.Props = props;
pec.Committed = (IStatementResult result) =>
{
var rs = result;
};
pec.FromNode = fromNodeId;
pec.ToNode = toNodeId;
pec.RelType = relType;
relateStack.Enqueue(pec);
}
public PendingNode Push(Model.Node node, Dictionary <string, object> variables)
{
var qlSafeVariables = new Dictionary <string, object>();
if (variables != null)
{
foreach (var kvp in variables)
{
var qlSafeName = Utils.GetGraphQLCompatibleFieldName(kvp.Key);
if (!qlSafeVariables.ContainsKey(qlSafeName))
{
qlSafeVariables.Add(qlSafeName, kvp.Value);
}
}
}
Dictionary <string, object> props = new Dictionary <string, object>();
props.Add("props", qlSafeVariables);
var pendingNode = new PendingNode(node);
if (qlSafeVariables.ContainsKey(pendingNode.TempId))
{
qlSafeVariables.Add("TempId", pendingNode.TempId);
}
else
{
qlSafeVariables["TempId"] = pendingNode.TempId;
}
var nodeLabel = node.Label;
var query = string.Format("CREATE (nn:{0} $props)", nodeLabel);
if (!constrained.Contains(nodeLabel))
{
var pecCs = new PendingCypher();
pecCs.Query = string.Format("CREATE CONSTRAINT ON(nc:{0}) ASSERT nc.TempId IS UNIQUE", nodeLabel);
pushStack.Enqueue(pecCs);
constrained.Add(nodeLabel);
}
var pec = new PendingCypher();
pec.Query = query;
pec.Props = props;
pec.Node = node;
pec.FromNode = pendingNode;
pushStack.Enqueue(pec);
pec.Committed = (IStatementResult result) =>
{
var rs = result;
if (pec.FromNode != null)
{
pec.FromNode.SetCommited(pec.FromNode.TempId);
}
};
return(pendingNode);
}
