java neo4j密码查询匹配节点

我很确定我应该看到我自己做的错误。我也很确定，我应该知道如何在java中构建一个体面的密码查询，但我根本无法。现在已经很晚了，自从过去4个小时以来，我一直对此感到震惊。所以，我放弃了。java neo4j密码查询匹配节点

我有一个相对简单的暗号询问我要执行对打开的事务端点

http://localhost:7474/db/data/transaction/[# number]

所以我想，我这样做只是创造一个节点，当我做到这一点，而只是匹配，而不是创建：

{"statements": [ {"statement": "MATCH (p:POST {properties}) RETURN p", "parameters": {"properties":{"sn_id": "TW", "id": "536627264453353472"}} } ] }

但是服务器告诉我，我不能在比赛中喜欢使用的参数图：

TRACE Neo4JPersistence - sending cypher {"statements": [ {"statement": "MATCH (p:POST {properties}) RETURN p", "parameters": {"properties":{"sn_id": "TW", "id": "536627264453353472"}} } ] } to endpoint http://localhost:7474/db/data/transaction/75 
    TRACE Neo4JPersistence - GET to http://localhost:7474/db/data/transaction/75 returned status code 200, returned data: {"commit":"http://localhost:7474/db/data/transaction/75/commit","results":[],"transaction":{"expires":"Sun, 23 Nov 2014 21:09:05 +0000"},"errors":[{"code":"Neo.ClientError.Statement.InvalidSyntax","message":"Parameter maps cannot be used in MATCH patterns (use a literal map instead, eg. \"{id: {param}.id}\") (line 1, column 15)\n\"MATCH (p:POST {properties}) RETURN p\"\n    ^"}]} 
    ERROR Neo4JPersistence - ERROR :: [{"message":"Parameter maps cannot be used in MATCH patterns (use a literal map instead, eg. \"{id: {param}.id}\") (line 1, column 15)\n\"MATCH (p:POST {properties}) RETURN p\"\n    ^","code":"Neo.ClientError.Statement.InvalidSyntax"}] - could not execute cypher statement at location http://localhost:7474/db/data/transaction/75

所以，好吧，我想。让我们去的东西简单，我构建了我的暗号是这样的：

{"statements": [ {"statement": "MATCH (p:SOCIALNETWORK {"sn_id": "TW"}) RETURN p"} ] }

但对于这一点，服务器返回它无法反序列化的要求，它不喜欢的S - 无论s表示是。

这里的堆栈跟踪它：

TRACE Neo4JPersistence - sending cypher {"statements": [ {"statement": "MATCH (p:SOCIALNETWORK {"sn_id": "TW"}) RETURN p"} ] } to endpoint http://localhost:7474/db/data/transaction/76 
TRACE Neo4JPersistence - GET to http://localhost:7474/db/data/transaction/76 returned status code 200, returned data: {"commit":"http://localhost:7474/db/data/transaction/76/commit","results":[],"transaction":{"expires":"Sun, 23 Nov 2014 21:18:01 +0000"},"errors":[{"code":"Neo.ClientError.Request.InvalidFormat","message":"Unable to deserialize request: Unexpected character ('s' (code 115)): was expecting comma to separate OBJECT entries\n at [Source: [email protected]{[email protected]{r=10,a=DISPATCHED,uri=/db/data/transaction/76},[email protected]{FILLING},g=HttpGenerator{s=START},p=HttpParser{s=END,87 of 87}}; line: 1, column: 59]"}]} 
ERROR Neo4JPersistence - ERROR :: [{"message":"Unable to deserialize request: Unexpected character ('s' (code 115)): was expecting comma to separate OBJECT entries\n at [Source: [email protected]{[email protected]{r=10,a=DISPATCHED,uri=\/db\/data\/transaction\/76},[email protected]{FILLING},g=HttpGenerator{s=START},p=HttpParser{s=END,87 of 87}}; line: 1, column: 59]","code":"Neo.ClientError.Request.InvalidFormat"}] - could not execute cypher statement at location http://localhost:7474/db/data/transaction/76

我被卡住，现在感到沮丧。任何人都可以帮助我吗？

感谢这么多提前，

基督教

来源

2014-11-23 siliconchris

与create，MATCH不能使用属性MAP-它需要你使用文字。所以您的查询应该结束这样看：

{ 
    "statements" : 
    [ 
     { 
     "statement": "MATCH (p:SOCIALNETWORK {sn_id: {snid}}) RETURN p", 
     "parameters": {"snid": "TW"} 
     } 
    ] 
}

在你的第二个查询，不要放在引号中的属性键：

{"statements": 
[ 
    { 
    "statement": "MATCH (p:SOCIALNETWORK {sn_id: 'TW'}) RETURN p" 
    } 
] 
}

来源

2014-11-24 04:33:59 Luanne

非常感谢。我得到它与您的答案一起工作。但是仍有一个问题。我如何获得id，或者甚至更好的是通过上面的查询找到的节点的url。我希望能够通过查询接收扩展json结构，所以我可以在json中使用自己的字段。但它看起来并不像返回。你能指导我吗？ – siliconchris 2014-11-24 20:28:43

返回ID（p）会给你另一个带有节点ID的列。如果您想要节点的完整URL，请在{“statements”中包含resultDataContents：[“REST”]：[{“statement”：“MATCH（p：SOCIALNETWORK {sn_id：'TW'}）RETURN p”， “resultDataContents”：[“REST”]}]}请参阅http://neo4j.com/docs/stable/rest-api-transactional.html#rest-api-execute-statements-in-an-open-transaction-in -rest-format-for-the return – Luanne 2014-11-25 03:58:22

得到它的工作。对于所有人来说，她是一个 – siliconchris 2014-11-27 11:14:17

自2.0.5版本，你可以使用与MATCH^¥（and MERGE）属性映射：

{ 
    "statements" : 
    [ 
     { 
     "statement": "MATCH (p:SOCIALNETWORK {sn_id: {properties}.sn_id)}) RETURN p", 
     "parameters": { "properties": {"snid": "TW"} } 
     } 
    ] 
}

他们还没有完全光滑如机智h CREATE但仍有改进。

^{^¥不幸的是它的正式记录只为MERGE，而不是为MATCH，但测试和你每天使用真正}

来源

2016-02-23 23:09:54 yair

java neo4j密码查询匹配节点

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