我最近一直在做一个项目，并开始使用ArangoDB，所以希望我能对你有所帮助。
我从Arango和AQL文档的以下链接中获得了一些灵感：

• AQL Graph Traversal
• Shortest Path in AQL

请看下面我的AQL查询，并让我知道如果这有帮助。您可以替换过滤器上的“欧洲”部分的@大陆，这将允许您动态指定它，如果需要的话。

FOR country IN Country
  FILTER country.Continent == 'Europe'
  FOR vertex, edge, path
  IN OUTBOUND country Distance
  RETURN path

我刚刚创建了一些测试集合，用两条边将国家连接在一起。我已经在'FOR'部分包含了查询的顶点、边和路径，所以欢迎您在最后使用'RETURN'部分替换顶点或边，看看会产生什么结果。

[
  {
    "edges": [
      {
        "_key": "67168",
        "_id": "Distance/67168",
        "_from": "Country/67057",
        "_to": "Country/67094",
        "_rev": "_aecXk7---_",
        "Distance": 5
      }
    ],
    "vertices": [
      {
        "_key": "67057",
        "_id": "Country/67057",
        "_rev": "_aecWJ0q--_",
        "countryName": "UK",
        "Continent": "Europe"
      },
      {
        "_key": "67094",
        "_id": "Country/67094",
        "_rev": "_aecWZhi--_",
        "countryName": "Italy",
        "Continent": "Europe"
      }
    ]
  },
  {
    "edges": [
      {
        "_key": "67222",
        "_id": "Distance/67222",
        "_from": "Country/67057",
        "_to": "Country/67113",
        "_rev": "_aecYB9---_",
        "Distance": 10
      }
    ],
    "vertices": [
      {
        "_key": "67057",
        "_id": "Country/67057",
        "_rev": "_aecWJ0q--_",
        "countryName": "UK",
        "Continent": "Europe"
      },
      {
        "_key": "67113",
        "_id": "Country/67113",
        "_rev": "_aecWmEy--_",
        "countryName": "Spain",
        "Continent": "Europe"
      }
    ]
  }
]

例如，如果用“RETURN edge”替换“RETURN path”零件，则只需检索边（如果这就是所需的全部内容），如下所示：

[
  {
    "_key": "67168",
    "_id": "Distance/67168",
    "_from": "Country/67057",
    "_to": "Country/67094",
    "_rev": "_aecXk7---_",
    "Distance": 5
  },
  {
    "_key": "67222",
    "_id": "Distance/67222",
    "_from": "Country/67057",
    "_to": "Country/67113",
    "_rev": "_aecYB9---_",
    "Distance": 10
  }
]