EdgeId是由 拼接而成，但是这里的顶点id类型不是通过引号区分的，而是根据前缀区分：

    • 当 id 类型为 number 时，EdgeId 的顶点 id 前有一个前缀L ，形如 “L123456>1>>L987654”
    • 当 id 类型为 string 时，EdgeId 的顶点 id 前有一个前缀S ，形如 “S1:peter>1>>S2:lop”

    接下来的示例均假设已经创建好了前述的各种schema和vertex信息

    2.2.1 创建一条边

    Method & Url
    Request Body
    1. {
    2.     "label": "created",
    3.     "outV": "1:peter",
    4.     "inV": "2:lop",
    5.     "outVLabel": "person",
    6.     "inVLabel": "software",
    7.     "properties": {
    8.         "date": "2017-5-18",
    9.         "weight": 0.2
    10.     }
    11. }
    Response Status
    1. 201
    Response Body
    1. {
    2.     "id": "S1:peter>1>>S2:lop",
    3.     "label": "created",
    4.     "type": "edge",
    5.     "inVLabel": "software",
    6.     "outVLabel": "person",
    7.     "inV": "2:lop",
    8.     "outV": "1:peter",
    9.     "properties": {
    10.         "date": "2017-5-18",
    11.         "weight": 0.2
    12.     }
    13. }

    2.2.2 创建多条边

    Params
    • check_vertex: 是否检查顶点存在(true | false)，当设置为 true 而待插入边的源顶点或目标顶点不存在时会报错。
    Method & Url
    1. POST http://localhost:8080/graphs/hugegraph/graph/edges/batch
    Request Body
    1. [
    2.     {
    3.         "label": "created",
    4.         "outV": "1:peter",
    5.         "inV": "2:lop",
    6.         "outVLabel": "person",
    7.         "inVLabel": "software",
    8.         "properties": {
    9.             "date": "2017-5-18",
    10.             "weight": 0.2
    11.         }
    12.     },
    13.     {
    14.         "label": "knows",
    15.         "outV": "1:marko",
    16.         "inV": "1:vadas",
    17.         "outVLabel": "person",
    18.         "inVLabel": "person",
    19.         "properties": {
    20.             "date": "2016-01-10",
    21.             "weight": 0.5
    22.         }
    23.     }
    24. ]
    Response Status
      Response Body
      1. [
      2.     "S1:peter>1>>S2:lop",
      3.     "S1:marko>2>>S1:vadas"
      4. ]

      2.2.3 更新边属性

      Method & Url
      1. PUT http://localhost:8080/graphs/hugegraph/graph/edges/S1:peter>1>>S2:lop?action=append
      Request Body
      1. {
      2.     "properties": {
      3.         "weight": 1.0
      4.     }
      5. }
      Response Status
      Response Body
      1. {
      2.     "id": "S1:peter>1>>S2:lop",
      3.     "label": "created",
      4.     "type": "edge",
      5.     "inVLabel": "software",
      6.     "outVLabel": "person",
      7.     "inV": "2:lop",
      8.     "outV": "1:peter",
      9.     "properties": {
      10.         "date": "2017-5-18",
      11.         "weight": 1
      12.     }
      13. }

      2.2.4 删除边属性

      Method & Url
      1. PUT http://localhost:8080/graphs/hugegraph/graph/edges/S1:peter>1>>S2:lop?action=eliminate
      Request Body
      2.     "properties": {
      3.         "weight": 1.0
      4.     }
      5. }

      注意：这里会直接删除属性（删除key和所有value），无论其属性的取值是single、set或list。

      Response Status
      1. 200
      Response Body
      1. {
      2.     "id": "S1:peter>1>>S2:lop",
      3.     "label": "created",
      4.     "type": "edge",
      5.     "inVLabel": "software",
      6.     "outVLabel": "person",
      7.     "inV": "2:lop",
      8.     "outV": "1:peter",
      9.     "properties": {
      10.         "date": "20170324"
      11.     }
      12. }

      2.2.5 获取符合条件的边

      Params
      • vertex_id: 顶点id
      • direction: 边的方向(OUT | IN | BOTH)
      • label: 边的标签
      • properties: 属性键值对(根据属性查询的前提是建立了索引)
      • limit: 查询数目
      • page: 页号

      vertex_id为可选参数，如果提供参数vertex_id则必须同时提供参数direction。无vertex_id参数时表示获取所有边，可通过limit限制查询数目。与顶点查询类似，如果提供page参数，必须提供limit参数，不允许带其他参数。

      Method & Url
      1. GET http://127.0.0.1:8080/graphs/hugegraph/graph/edges?vertex_id="1:josh"&direction=BOTH&label=created&properties={}
      Response Status
      1. 200
      Response Body
      1. {
      2.     "edges": [
      3.         {
      4.             "id": "S1:josh>1>>S2:lop",
      5.             "label": "created",
      6.             "type": "edge",
      7.             "inVLabel": "software",
      8.             "outVLabel": "person",
      9.             "inV": "2:lop",
      10.             "outV": "1:josh",
      11.             "properties": {
      12.                 "date": "20091111",
      13.                 "weight": 0.4
      14.             }
      15.         },
      16.         {
      17.             "id": "S1:josh>1>>S2:ripple",
      18.             "label": "created",
      19.             "type": "edge",
      20.             "inVLabel": "software",
      21.             "outVLabel": "person",
      22.             "inV": "2:ripple",
      23.             "outV": "1:josh",
      24.             "properties": {
      25.                 "date": "20171210",
      26.                 "weight": 1
      27.             }
      28.         }
      29.     ]
      30. }

      分页查询所有边，获取第一页（page不带参数值），限定3条

      Url
      1. http://127.0.0.1:8080/graphs/hugegraph/graph/edges?page&limit=3
      Response Status
      Response Body
      1. {
      2.     "edges": [{
      3.             "id": "S1:peter>2>>S2:lop",
      4.             "label": "created",
      5.             "type": "edge",
      6.             "inVLabel": "software",
      7.             "outVLabel": "person",
      8.             "inV": "2:lop",
      9.             "outV": "1:peter",
      10.             "properties": {
      11.                 "weight": 0.2,
      12.             }
      13.         },
      14.         {
      15.             "id": "S1:josh>2>>S2:lop",
      16.             "label": "created",
      17.             "type": "edge",
      18.             "inVLabel": "software",
      19.             "outVLabel": "person",
      20.             "inV": "2:lop",
      21.             "outV": "1:josh",
      22.             "properties": {
      23.                 "weight": 0.4,
      24.                 "date": "20091111"
      25.             }
      26.         },
      28.             "id": "S1:josh>2>>S2:ripple",
      29.             "label": "created",
      30.             "type": "edge",
      31.             "inVLabel": "software",
      32.             "outVLabel": "person",
      33.             "inV": "2:ripple",
      34.             "outV": "1:josh",
      35.             "properties": {
      36.                 "weight": 1,
      37.                 "date": "20171210"
      38.             }
      39.         }
      40.     ],
      41.     "page": "002500100753313a6a6f73681210010004000000020953323a726970706c65f07ffffffcf07ffffffd8460d63f4b398dd2721ed4fdb7716b420004"
      42. }

      返回的body里面是带有下一页的页号信息的，"page": "002500100753313a6a6f73681210010004000000020953323a726970706c65f07ffffffcf07ffffffd8460d63f4b398dd2721ed4fdb7716b420004"，在查询下一页的时候将该值赋给page参数。

      Method & Url
      1. GET http://127.0.0.1:8080/graphs/hugegraph/graph/edges?page=002500100753313a6a6f73681210010004000000020953323a726970706c65f07ffffffcf07ffffffd8460d63f4b398dd2721ed4fdb7716b420004&limit=3
      Response Status
      1. 200
      Response Body
      1. {
      2.     "edges": [{
      3.             "id": "S1:marko>1>20130220>S1:josh",
      4.             "label": "knows",
      5.             "type": "edge",
      6.             "inVLabel": "person",
      7.             "outVLabel": "person",
      8.             "inV": "1:josh",
      9.             "outV": "1:marko",
      10.             "properties": {
      11.                 "weight": 1,
      12.                 "date": "20130220"
      13.             }
      14.         },
      15.         {
      16.             "id": "S1:marko>1>20160110>S1:vadas",
      17.             "label": "knows",
      18.             "type": "edge",
      19.             "inVLabel": "person",
      20.             "outVLabel": "person",
      21.             "inV": "1:vadas",
      22.             "outV": "1:marko",
      23.             "properties": {
      24.                 "weight": 0.5,
      25.                 "date": "20160110"
      26.             }
      27.         },
      28.         {
      29.             "id": "S1:marko>2>>S2:lop",
      30.             "label": "created",
      31.             "type": "edge",
      32.             "inVLabel": "software",
      33.             "outVLabel": "person",
      34.             "inV": "2:lop",
      35.             "outV": "1:marko",
      36.             "properties": {
      37.                 "weight": 0.4,
      38.                 "date": "20171210"
      39.             }
      40.         }
      41.     ],
      42.     "page": null
      43. }

      此时"page": null表示已经没有下一页了。

      2.2.6 根据Id获取边

      Method & Url
      1. GET http://localhost:8080/graphs/hugegraph/graph/edges/S1:peter>1>>S2:lop
      Response Status
      1. 200
      Response Body
      1. {
      2.     "id": "S1:peter>1>>S2:lop",
      3.     "label": "created",
      4.     "type": "edge",
      5.     "inVLabel": "software",
      6.     "outVLabel": "person",
      7.     "inV": "2:lop",
      8.     "outV": "1:peter",
      9.     "properties": {
      10.         "date": "2017-5-18",
      11.         "weight": 0.2
      12.     }
      13. }

      2.2.7 根据Id删除边

      Method & Url
      Response Status