Json 反转MQL查询
(特别是第3.2.6节)讨论了反转查询以获得不同结构中的相同数据,以简化查询或调整数据以返回与您自己的结构相似的结构 因此,我从以下查询开始:Json 反转MQL查询,json,freebase,mql,Json,Freebase,Mql,(特别是第3.2.6节)讨论了反转查询以获得不同结构中的相同数据,以简化查询或调整数据以返回与您自己的结构相似的结构 因此,我从以下查询开始: https://api.freebase.com/api/service/mqlread?query={"query":{"type":"/automotive/model","name":"Ford Taurus","generations":[]}} 可读版本: { "type":"/automotive/model", "name
https://api.freebase.com/api/service/mqlread?query={"query":{"type":"/automotive/model","name":"Ford Taurus","generations":[]}}
可读版本:
{
"type":"/automotive/model",
"name":"Ford Taurus",
"generations":[]
}
[{
"type":"/automotive/generation",
"model":"Ford Taurus",
"name":null
}]
结果:
{
"code": "/api/status/ok",
"result": {
"generations": [
"First Generation Ford Taurus",
"Second Generation Ford Taurus",
"Fifth Generation Ford Taurus",
"Sixth Generation Ford Taurus",
"Fourth Generation Ford Taurus",
"Third Generation Ford Taurus"
],
"name": "Ford Taurus",
"type": "/automotive/model"
},
"status": "200 OK",
"transaction_id": "cache;cache04.p01.sjc1:8101;2013-04-25T22:05:58Z;0012"
}
{
"code": "/api/status/ok",
"result": [
{
"model": "Ford Taurus",
"name": "First Generation Ford Taurus",
"type": "/automotive/generation"
},
{
"model": "Ford Taurus",
"name": "Third Generation Ford Taurus",
"type": "/automotive/generation"
}
],
"status": "200 OK",
"transaction_id": "cache;cache01.p01.sjc1:8101;2013-04-25T23:00:35Z;0010"
}
但我希望以查询生成为中心,因此我对其进行如下修改:
https://api.freebase.com/api/service/mqlread?query={"query":[{"type":"/automotive/generation","model":"Ford Taurus","name":null}]}
可读版本:
{
"type":"/automotive/model",
"name":"Ford Taurus",
"generations":[]
}
[{
"type":"/automotive/generation",
"model":"Ford Taurus",
"name":null
}]
结果:
{
"code": "/api/status/ok",
"result": {
"generations": [
"First Generation Ford Taurus",
"Second Generation Ford Taurus",
"Fifth Generation Ford Taurus",
"Sixth Generation Ford Taurus",
"Fourth Generation Ford Taurus",
"Third Generation Ford Taurus"
],
"name": "Ford Taurus",
"type": "/automotive/model"
},
"status": "200 OK",
"transaction_id": "cache;cache04.p01.sjc1:8101;2013-04-25T22:05:58Z;0012"
}
{
"code": "/api/status/ok",
"result": [
{
"model": "Ford Taurus",
"name": "First Generation Ford Taurus",
"type": "/automotive/generation"
},
{
"model": "Ford Taurus",
"name": "Third Generation Ford Taurus",
"type": "/automotive/generation"
}
],
"status": "200 OK",
"transaction_id": "cache;cache01.p01.sjc1:8101;2013-04-25T23:00:35Z;0010"
}
我的反向查询只返回两代!请帮助我找出原因。如果查看Freebase架构页面,您将看到
model
属性已被弃用,并被models属性替换。对查询进行更改:
[{
"type": "/automotive/generation",
"models": "Ford Taurus",
"name": null
}]
为您提供了预期的结果集:
[
{
"models": "Ford Taurus",
"name": "First Generation Ford Taurus",
"type": "/automotive/generation"
},
{
"models": "Ford Taurus",
"name": "Second Generation Ford Taurus",
"type": "/automotive/generation"
},
{
"models": "Ford Taurus",
"name": "Fifth Generation Ford Taurus",
"type": "/automotive/generation"
},
{
"models": "Ford Taurus",
"name": "Sixth Generation Ford Taurus",
"type": "/automotive/generation"
},
{
"models": "Ford Taurus",
"name": "Fourth Generation Ford Taurus",
"type": "/automotive/generation"
},
{
"models": "Ford Taurus",
"name": "Third Generation Ford Taurus",
"type": "/automotive/generation"
}
]
哇!我无意中把它变成了单数(我在看模型模式,所以我不知道模型)。谢谢