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I'm having an issue with the Where clause not pulling out the values and putting them as parameters.

return 
   startingNode
   .StartCypher("startNode")
   .Match(matchQuery)
   .Where<TSourceNode>(otherStartNodes => otherStartNodes.Id != startingNode.Data.Id)                
   .Return<TSourceNode>("otherStartNodes").Results;

The Query string comes out looking like "WHERE (Id <> Id)". I can fix the problem easily by not using lambdas and just using the code below but I'm interested to see why it didn't work

.Where("startNode.Id <> otherStartNodes.Id")

I've also tried the below line but that didn't work either.

.Where<TSourceNode, TSourceNode>((otherStartNodes, startNode) => otherStartNodes.Id != startNode.Id)

Edit Tatham - I've created an issue in Bitbucket for this.

You are correct the right way for the Where clause should be.

.Where<TSourceNode, TSourceNode>((otherStartNodes, startNode) => otherStartNodes.Id != startNode.Id))
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1 回答 1

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Update: This is issue 73, fixed in 1.0.0.525 and above.

From what I understand of your rather dynamic query, the third option you mentioned (.Where<TSourceNode, TSourceNode>((otherStartNodes, startNode) => otherStartNodes.Id != startNode.Id)) is the correct one.

This should work. I even added more unit tests in Neo4jClient to assert that it does: https://bitbucket.org/Readify/neo4jclient/commits/cc73ce253ddce89e69785caa68f5e4660a622b96

Can you explain why you think it didn't work? What was the resulting query text?

The value you're getting for .Where<TSourceNode>(otherStartNodes => otherStartNodes.Id != startingNode.Data.Id) is wrong. It should evaluate startingNode.Data.Id once in .NET, then send something like WHERE otherStartNodes.Id <> {p1} over the wire. I'll test this separately.

于 2013-04-02T04:23:06.083 回答