I am able to get all the child nodes and its related information under a parent node but in a array of objects format , for the query
g.V(4128).repeat(out()).emit()
[
{
"id": 4152.0,
"label": "location",
"type": "vertex",
"properties": {
"displayName": [
{
"id": "1l3-37c-1l1",
"value": "XYZ"
}
],
"description": [
{
"id": "1zb-37c-7wl",
"value": "XYZ World"
}
],
"shortName": [
{
"id": "16v-37c-745",
"value": "XYZ"
}
]
}
},
{
"id": 4176.0,
"label": "location",
"type": "vertex",
"properties": {
"displayName": [
{
"id": "1l6-380-1l1",
"value": "XYZ-XYZW"
}
],
"description": [
{
"id": "1ze-380-7wl",
"value": "XYZ West Campus"
}
],
"shortName": [
{
"id": "16y-380-745",
"value": "XYZW"
}
]
}
},
{
"id": 8344.0,
"label": "location",
"type": "vertex",
"properties": {
"displayName": [
{
"id": "3kj-6fs-1l1",
"value": "XYZ-XYZE"
}
],
"description": [
{
"id": "3yr-6fs-7wl",
"value": "XYZ East Campus"
}
],
"shortName": [
{
"id": "36b-6fs-745",
"value": "XYZE"
}
]
}
},
{
"id": 4104.0,
"label": "location",
"type": "vertex",
"properties": {
"displayName": [
{
"id": "1kx-360-1l1",
"value": "XYZ-XYZW-P1"
}
],
"description": [
{
"id": "1z5-360-7wl",
"value": "XYZ West Campus-Phase-1"
}
],
"shortName": [
{
"id": "16p-360-745",
"value": "P1"
}
]
}
},
{
"id": 4296.0,
"label": "location",
"type": "vertex",
"properties": {
"displayName": [
{
"id": "1ll-3bc-1l1",
"value": "XYZ-XYZW-P3"
}
],
"description": [
{
"id": "1zt-3bc-7wl",
"value": "XYZ West Campus-Phase-3"
}
],
"shortName": [
{
"id": "17d-3bc-745",
"value": "P3"
}
]
}
},
{
"id": 8200.0,
"label": "location",
"type": "vertex",
"properties": {
"displayName": [
{
"id": "3k1-6bs-1l1",
"value": "XYZ-XYZW-P2"
}
],
"description": [
{
"id": "3y9-6bs-7wl",
"value": "XYZ West Campus-Phase-2"
}
],
"shortName": [
{
"id": "35t-6bs-745",
"value": "P2"
}
]
}
},
{
"id": 8224.0,
"label": "location",
"type": "vertex",
"properties": {
"displayName": [
{
"id": "3yc-6cg-1l1",
"value": "XYZ-XYZE-P1"
}
],
"description": [
{
"id": "4ck-6cg-7wl",
"value": "XYZ East Campus-Phase-1"
}
],
"shortName": [
{
"id": "3k4-6cg-745",
"value": "P1"
}
]
}
},
{
"id": 8392.0,
"label": "location",
"type": "vertex",
"properties": {
"displayName": [
{
"id": "3kp-6h4-1l1",
"value": "XYZ-XYZE-P2"
}
],
"description": [
{
"id": "3yx-6h4-7wl",
"value": "XYZ East Campus-Phase-2"
}
],
"shortName": [
{
"id": "36h-6h4-745",
"value": "P2"
}
]
}
}
]
我需要以层次结构的方式获得相同的信息 .
我尝试了以下查询
g.V（4128）.repeat（下（）） . 发射（） . 树（） . 由（__ . valueMap（真））
但我没有得到有效的json .
我需要以分层方式获取上述数据
Updated
我尝试了以下查询
g.V(4128).repeat(out()).emit().tree().by(__.valueMap(true))
我收到的回复是
[
{
"{label = org, name = [XYZ], orgId = [00000000-0000-0000-0000-000000000001], desc = [XYZ Organization], id = 4128}": {
"{label = location, displayName = [hh], description = [hfds], shortName = [kk], id = 8272}": {
},
"{label = location, displayName = [XYZ], description = [XYZ World], shortName = [XYZ], id = 4152}": {
"{label = location, displayName = [XYZ-XYZW], description = [XYZ West Campus], shortName = [XYZW], id = 4176}": {
"{label = location, displayName = [XYZ-XYZW-P3], description = [XYZ West Campus-Phase-3], shortName = [P3], id = 4296}": {
},
"{label = location, displayName = [XYZ-XYZW-P2], description = [XYZ West Campus-Phase-2], shortName = [P2], id = 8200}": {
},
"{label = location, displayName = [XYZ-XYZW-P1], description = [XYZ West Campus-Phase-1], shortName = [P1], id = 4104}": {
}
},
"{label = location, displayName = [XYZ-XYZE], description = [XYZ East Campus], shortName = [XYZE], id = 8344}": {
"{label = location, displayName = [XYZ-XYZE-P1], description = [XYZ East Campus-Phase-1], shortName = [P1], id = 8224}": {
},
"{label = location, displayName = [XYZ-XYZE-P2], description = [XYZ East Campus-Phase-2], shortName = [P2], id = 8392}": {
}
}
},
"{label = location, displayName = [hh], description = [hfds], shortName = [kk], id = 8248}": {
},
"{label = location, displayName = [hh], description = [hfds], shortName = [kk], id = 12488}": {
}
}
}]
现在您可以看到所收到的json不合适，因为该键包含'='分隔的字段 .
现在至于答案，我也尝试了下面的查询
g.V（4128）.repeat（下（）） . 发射（） . 树（）下 . （）
但响应仅返回id并且没有解析顶点属性
[
{
"4128": {
"8272": {},
"4152": {
"4176": {
"4104": {},
"4296": {},
"8200": {}
},
"8344": {
"8224": {},
"8392": {}
}
},
"8248": {},
"12488": {}
}
}
]
对于上下文，我在gremlin-server.yaml文件中使用以下配置
authentication: {className: org.apache.tinkerpop.gremlin.server.auth.AllowAllAuthenticator,
config: null}
channelizer: org.apache.tinkerpop.gremlin.server.channel.HttpChannelizer
graphs: {graph: 'D:/graph-data-access/src/test/resources/titan-inmemory.properties'}
gremlinPool: 8
host: localhost
maxAccumulationBufferComponents: 1024
maxChunkSize: 8192
maxContentLength: 65536
maxHeaderSize: 8192
maxInitialLineLength: 4096
metrics:
consoleReporter: null
csvReporter: null
gangliaReporter: null
graphiteReporter: null
jmxReporter: null
slf4jReporter: {enabled: true, interval: 180000, loggerName: org.apache.tinkerpop.gremlin.server.Settings$Slf4jReporterMetrics}
plugins: [aurelius.titan, tinkerpop.gephi]
port: 8182
processors: []
resultIterationBatchSize: 64
scriptEngines:
gremlin-groovy:
config: null
imports: [java.lang.Math]
scripts: ['D:/graph-data-access/src/test/resources/generate-locations.groovy']
staticImports: [java.lang.Math.PI]
scriptEvaluationTimeout: 30000
serializedResponseTimeout: 30000
serializers:
- className: org.apache.tinkerpop.gremlin.driver.ser.GryoMessageSerializerV1d0
config: {useMapperFromGraph: graph}
- className: org.apache.tinkerpop.gremlin.driver.ser.GryoMessageSerializerV1d0
config: {serializeResultToString: true}
- className: org.apache.tinkerpop.gremlin.driver.ser.GraphSONMessageSerializerV1d0
config: {useMapperFromGraph: graph}
- className: org.apache.tinkerpop.gremlin.driver.ser.GraphSONMessageSerializerGremlinV1d0
config: {useMapperFromGraph: graph}
ssl: {enabled: false, keyCertChainFile: null, keyFile: null, keyPassword: null, trustCertChainFile: null}
threadPoolBoss: 1
threadPoolWorker: 1
writeBufferHighWaterMark: 65536
writeBufferLowWaterMark: 32768
我正在使用Tinkerpop 3.0.1版孵化，因为我正在尝试将Titan 1.0.0与DynamoDb一起用作远程连接的存储后端 .
1 回答
不确定"but i don't get valid json"的意思 . 如果不包含
by(valueMap(true))并且只是序列化整个顶点，则应该能够在GraphSON 1.0中序列化Tree. 如果您尝试将其作为 Map 进行操作，则会出现故障，因为它会对图形元素作为关键字做出一些假设（这可能很糟糕） .格式为：
在GraphSON 2.0中你得到这个：
格式为：
请注意，对于GraphSON 2.0，您还可以使用
by(valueMap(true))：格式为：
如果你使用旧版本的TinkerPop回到3.0.x，那么树的一些限制不容易解决 . 唯一的方法是采用原始树并对其进行后处理，以使其形成对JSON友好的形式 . 这是一种方法：
这种格式在GraphSON 1.0（3.0.x中使用的）中：
我创建的
convert()函数只是递归迭代树并将每个[vertex: children]转换为[vertexId: [vertex,children]. 您可以转换为您喜欢的任何格式，只要您构建有效的JSON，其中有一个可用的String键字段 . 我可以轻松地让convert()函数返回[vertexId: [node: vertex, leaves: children]：