【发布时间】：2020-04-16 07:07:24
【问题描述】：
上图是我的图表的样子，我想查询以下输出：
[
{
chart:{
name: 'chart1',
id: 'chart1',
label: 'chart',
pk: 'chart1',
},
variables: [
{
variable: {
name:'variable1'
id: 'variable1',
label: 'variable',
pk: 'variable1',
},
years: [
{
name:'year1'
id: 'year1',
label: 'year',
pk: 'year1',
},
{
name:'year2'
id: 'year2',
label: 'year',
pk: 'year2',
},
],
},
{
variable: {
name:'variable2'
id: 'variable2',
label: 'variable',
pk: 'variable2',
},
years: [
{
name:'year3'
id: 'year3',
label: 'year',
pk: 'year3',
},
],
}
],
},
{
chart:{
name: 'chart2',
id: 'chart2',
label: 'chart',
pk: 'chart2',
},
variables: [
{
variable: {
name:'variable2'
id: 'variable2',
label: 'variable',
pk: 'variable2',
},
years: [
{
name:'year4'
id: 'year4',
label: 'year',
pk: 'year4',
},
],
},
],
}
]
但是对于我当前的查询：
g
.V()
.hasLabel('chart')
.project('chart', 'variables')
.by(valueMap(true))
.by(
out('visualizes')
.hasLabel('year')
.out('outputs')
.hasLabel('variable')
.project('variable', 'years')
.by(
valueMap(true).fold()
)
.by(
__.in('outputs')
.hasLabel('year')
.valueMap(true)
.fold()
)
.fold()
)
这是我得到的：
[
{
chart: {
id: 'chart1',
label: 'chart',
name: 'chart1',
pk: 'chart1',
},
variables: [
{
variable: [
{
id: 'variable1',
label: variable,
name: 'variable1',
pk: 'variable1'
}
],
years: [
{
id: 'year1',
label: 'year',
name: 'year1',
pk: 'year1',
},
{
id: 'year2',
label: "year",
name: 'year2',
pk: 'year2'
},
]
},
{
variable: [
{
id: 'variable1',
label: 'variable',
name: 'variable1',
'pk': 'variable1'
}
],
years: [
{
id: 'year1',
label: 'year',
name: 'year1',
pk: 'year1'
},
{
id: 'year2',
label: 'year',
name: 'year2',
pk: 'year2'
}
]
},
{
variable: [
{
id: 'variable2',
label: "variable",
name: 'variable2',
pk: 'variable2'
}
],
years: [
{
id: 'year3',
label: 'year',
name: 'year3',
pk: 'year3',
},
{
id: 'year4',
label: "year",
name: 'year4',
pk: 'year4'
}
]
}
]
},
{
chart: {
id: 'chart2',
label: 'chart',
name: 'chart2',
pk: 'chart2'
},
variables: [
{
variable: [
{
id: 'variable2',
label: 'variable',
name: 'variable2',
pk: 'variable2'
}
],
years: [
{
id: 'year3',
label: 'year',
name: 'year3',
pk: 'year3'
},
{
id: 'year4',
label: 'year',
name: 'year4',
pk: 'year4'
}
]
}
]
}
]
//this is the formatted version to be easily read. refer to this link for the actual json: https://pastebin.com/Y2ncHyPi
从实际输出中可以看出，我的查询问题是chart1 重复variable1 和chart2 的变量有year3，它来自chart1。我是否必须更改图表的结构？还是我必须添加其他属性以供参考？请帮忙。
种子图查询：
g
.addV('chart')
.property('name', 'chart1')
.property('pk', 'chart1')
.property('id', 'chart1')
.as('chart1')
.addV('chart')
.property('name', 'chart2')
.property('pk', 'chart2')
.property('id', 'chart2')
.as('chart2')
.addV('year')
.property('name', 'year1')
.property('pk', 'year1')
.property('id', 'year1')
.as('year1')
.addV('year')
.property('name', 'year2')
.property('pk', 'year2')
.property('id', 'year2')
.as('year2')
.addV('year')
.property('name', 'year3')
.property('pk', 'year3')
.property('id', 'year3')
.as('year3')
.addV('year')
.property('name', 'year4')
.property('pk', 'year4')
.property('id', 'year4')
.as('year4')
.addV('variable')
.property('name', 'variable1')
.property('pk', 'variable1')
.property('id', 'variable1')
.as('variable1')
.addV('variable')
.property('name', 'variable2')
.property('pk', 'variable2')
.property('id', 'variable2')
.as('variable2')
.addE('visualizes')
.from('chart1')
.to('year1')
.addE('outputs')
.from('year1')
.to('variable1')
.addE('visualizes')
.from('chart1')
.to('year2')
.addE('outputs')
.from('year2')
.to('variable1')
.addE('visualizes')
.from('chart1')
.to('year3')
.addE('outputs')
.from('year3')
.to('variable2')
.addE('visualizes')
.from('chart2')
.to('year4')
.addE('outputs')
.from('year4')
.to('variable2')
PS：我正在使用 Azure Cosmos DB 的 gremlin API。
【问题讨论】：
标签： gremlin graph-databases azure-cosmosdb-gremlinapi