Question

我正在尝试按如下方式遍历Freebase国家/地区列表：

#r @"..\packages\FSharp.Data.1.1.4\lib\net40\FSharp.Data.dll"

open FSharp.Data

FreebaseData.GetDataContext().``Time and Space``.Location.Countries
|> Seq.iter (fun c -> printfn "%s" c.Name)

在F＃Interactive中执行此操作会出现以下错误：

System.Net.WebException: The remote server returned an error: (400) Bad Request.
{
 "error": {
  "errors": [
   {
    "domain": "global",
    "reason": "badRequest",
    "message": "Unique query may have at most one result. Got 2",
    "locationType": "other",
    "location": "/location/country/iso_alpha_3"
   }
  ],
  "code": 400,
  "message": "Unique query may have at most one result. Got 2"
 }
}

我可以做些什么来解决这个问题吗？

谢谢， - 罗布

Answer 1

这是由于Freebase类型提供程序中的错误 - 请参阅here。根据那里的问题描述，您可以尝试这样的解决方法：

let countries = query {
    for country in freebase.``Time and Space``.Location.Countries do
    where (country.Name <> "Ghana")
}

countries
|> Seq.iter (fun c -> printfn "%s" c.Name)

Answer 2

这已在FSharp.Data 1.1.5

中修复

使用F＃的Freebase国家/地区

2 个答案: