ArangoDB组和排序
在ArangoDB中,我想对通知数据进行分组和排序 我有以下通知数据集ArangoDB组和排序,arangodb,aql,Arangodb,Aql,在ArangoDB中,我想对通知数据进行分组和排序 我有以下通知数据集 [ {id: 1, groupId: 1, text: 'Aoo', time: 23}, {id: 2, groupId: 2, text: 'Boo', time: 32}, {id: 3, groupId: 1, text: 'Coo', time: 45}, {id: 4, groupId: 3, text: 'Doo', time: 56}, {id: 5, groupId: 1, text:
[
{id: 1, groupId: 1, text: 'Aoo', time: 23},
{id: 2, groupId: 2, text: 'Boo', time: 32},
{id: 3, groupId: 1, text: 'Coo', time: 45},
{id: 4, groupId: 3, text: 'Doo', time: 56},
{id: 5, groupId: 1, text: 'Eoo', time: 22},
{id: 6, groupId: 2, text: 'Foo', time: 23}
]
我想按groupId对通知进行分组,最近的通知组应显示在顶部。
最终结果应该是这样的
[
{ groupId: 3, notifications: [{id: 4, groupId: 3, text: 'Doo', time: 56}],
{ groupId: 1, notification: [{id: 3, groupId: 1, text: 'Coo', time: 45}, {id: 1, groupId: 1, text: 'Aoo', time: 23}, {id: 5, groupId: 1, text: 'Eoo', time: 22}]},
{ groupId: 2, notifications: [{id: 2, groupId: 2, text: 'Boo', time: 32}, {id: 6, groupId: 2, text: 'Foo', time: 23}] }
]
尝试遵循AQL
FOR doc IN notificaion
SORT doc.time DESC
COLLECT groupId = doc.groupId INTO g
RETURN { groupId, notifications: g[*].doc }
上面的查询对内部组元素进行排序,但不对外部组进行排序
我正在努力为它建立一个AQL。任何指针都会有帮助
谢谢对文档集进行两次排序:一次收集文档集-就像您已经做的那样,然后收集:
FOR doc IN notification
SORT doc.time DESC
COLLECT groupId = doc.groupId INTO g
SORT g[*].doc.time DESC
RETURN { groupId, notifications: g[*].doc }
在我的测试中,这会产生所需的序列:
[
{
"groupId": 3,
"notifications": [
{
"id": 4,
"groupId": 3,
"text": "Doo",
"time": 56
}
]
},
{
"groupId": 1,
"notifications": [
{
"id": 3,
"groupId": 1,
"text": "Coo",
"time": 45
},
{
"id": 1,
"groupId": 1,
"text": "Aoo",
"time": 23
},
{
"id": 5,
"groupId": 1,
"text": "Eoo",
"time": 22
}
]
},
{
"groupId": 2,
"notifications": [
{
"id": 2,
"groupId": 2,
"text": "Boo",
"time": 32
},
{
"id": 6,
"groupId": 2,
"text": "Foo",
"time": 23
}
]
}
]
在这个社区里会有某种互动。我的回答有用吗?我错了吗?没有你方的确认,这个问答对其他访客来说几乎毫无价值。