How are F# Type Providers used on a changing Rest/JSON Endpoint?
I am trying to use F# type providers to include weather data in my application. I am using OpenWeatherMap.org to get current weather data. https://openweathermap.org/current
Sometimes the OpenWeatherMap response does not show any JSON for rain (Eg. There is no rain for a 1 hour window).
So if I do something like this:
type WeatherForecast= JsonProvider<"http://api.openweathermap.org/data/2.5/weather?lat=39.64&lon=-74.28&appid=MyKeyICantSharePublicly">
...
let mydata = WeatherForecast.Load("http://api.openweathermap.org/data/2.5/weather/?lat=12&lon=12&appid=MyKeyICantSharePublicly)
printf "%s" (string mydata.Rain.``1h``)
The printf statement will fail because it doesn't always know what mydata.Rain is because the type provider does not provide the Rain information anymore.
Depending on when I try to compile my application, the build will fail because of the type provider.
How can I use type providers with a changing Rest/Json Endpoint like this?
Example data.
{
"coord": {
"lon": -74.28,
"lat": 39.64
},
"weather": [
{
"id": 701,
"main": "Mist",
"description": "mist",
"icon": "50d"
},
{
"id": 721,
"main": "Haze",
"description": "haze",
"icon": "50d"
}
],
"base": "stations",
"main": {
"temp": 7.71,
"pressure": 1012,
"humidity": 93,
"temp_min": 7,
"temp_max": 9.4
},
"visibility": 4023,
"wind": {
"speed": 5.7,
"deg": 2...
functional-programming f# type-providers fsharp.data.typeproviders
asked Nov 20 at 16:34
Philip Nguyen
3691421
add a comment |
I am trying to use F# type providers to include weather data in my application. I am using OpenWeatherMap.org to get current weather data. https://openweathermap.org/current
Sometimes the OpenWeatherMap response does not show any JSON for rain (Eg. There is no rain for a 1 hour window).
So if I do something like this:
type WeatherForecast= JsonProvider<"http://api.openweathermap.org/data/2.5/weather?lat=39.64&lon=-74.28&appid=MyKeyICantSharePublicly">
...
let mydata = WeatherForecast.Load("http://api.openweathermap.org/data/2.5/weather/?lat=12&lon=12&appid=MyKeyICantSharePublicly)
printf "%s" (string mydata.Rain.``1h``)
The printf statement will fail because it doesn't always know what mydata.Rain is because the type provider does not provide the Rain information anymore.
Depending on when I try to compile my application, the build will fail because of the type provider.
How can I use type providers with a changing Rest/Json Endpoint like this?
Example data.
{
"coord": {
"lon": -74.28,
"lat": 39.64
},
"weather": [
{
"id": 701,
"main": "Mist",
"description": "mist",
"icon": "50d"
},
{
"id": 721,
"main": "Haze",
"description": "haze",
"icon": "50d"
}
],
"base": "stations",
"main": {
"temp": 7.71,
"pressure": 1012,
"humidity": 93,
"temp_min": 7,
"temp_max": 9.4
},
"visibility": 4023,
"wind": {
"speed": 5.7,
"deg": 2...
functional-programming f# type-providers fsharp.data.typeproviders
asked Nov 20 at 16:34
Philip Nguyen
3691421
add a comment |
I am trying to use F# type providers to include weather data in my application. I am using OpenWeatherMap.org to get current weather data. https://openweathermap.org/current
Sometimes the OpenWeatherMap response does not show any JSON for rain (Eg. There is no rain for a 1 hour window).
So if I do something like this:
type WeatherForecast= JsonProvider<"http://api.openweathermap.org/data/2.5/weather?lat=39.64&lon=-74.28&appid=MyKeyICantSharePublicly">
...
let mydata = WeatherForecast.Load("http://api.openweathermap.org/data/2.5/weather/?lat=12&lon=12&appid=MyKeyICantSharePublicly)
printf "%s" (string mydata.Rain.``1h``)
The printf statement will fail because it doesn't always know what mydata.Rain is because the type provider does not provide the Rain information anymore.
Depending on when I try to compile my application, the build will fail because of the type provider.
How can I use type providers with a changing Rest/Json Endpoint like this?
Example data.
{
"coord": {
"lon": -74.28,
"lat": 39.64
},
"weather": [
{
"id": 701,
"main": "Mist",
"description": "mist",
"icon": "50d"
},
{
"id": 721,
"main": "Haze",
"description": "haze",
"icon": "50d"
}
],
"base": "stations",
"main": {
"temp": 7.71,
"pressure": 1012,
"humidity": 93,
"temp_min": 7,
"temp_max": 9.4
},
"visibility": 4023,
"wind": {
"speed": 5.7,
"deg": 2...
functional-programming f# type-providers fsharp.data.typeproviders
asked Nov 20 at 16:34
Philip Nguyen
3691421
I am trying to use F# type providers to include weather data in my application. I am using OpenWeatherMap.org to get current weather data. https://openweathermap.org/current
Sometimes the OpenWeatherMap response does not show any JSON for rain (Eg. There is no rain for a 1 hour window).
So if I do something like this:
type WeatherForecast= JsonProvider<"http://api.openweathermap.org/data/2.5/weather?lat=39.64&lon=-74.28&appid=MyKeyICantSharePublicly">
...
let mydata = WeatherForecast.Load("http://api.openweathermap.org/data/2.5/weather/?lat=12&lon=12&appid=MyKeyICantSharePublicly)
printf "%s" (string mydata.Rain.``1h``)
The printf statement will fail because it doesn't always know what mydata.Rain is because the type provider does not provide the Rain information anymore.
Depending on when I try to compile my application, the build will fail because of the type provider.
How can I use type providers with a changing Rest/Json Endpoint like this?
Example data.
{
"coord": {
"lon": -74.28,
"lat": 39.64
},
"weather": [
{
"id": 701,
"main": "Mist",
"description": "mist",
"icon": "50d"
},
{
"id": 721,
"main": "Haze",
"description": "haze",
"icon": "50d"
}
],
"base": "stations",
"main": {
"temp": 7.71,
"pressure": 1012,
"humidity": 93,
"temp_min": 7,
"temp_max": 9.4
},
"visibility": 4023,
"wind": {
"speed": 5.7,
"deg": 2...
functional-programming f# type-providers fsharp.data.typeproviders
functional-programming f# type-providers fsharp.data.typeproviders
asked Nov 20 at 16:34
Philip Nguyen
3691421
asked Nov 20 at 16:34
Philip Nguyen
3691421
asked Nov 20 at 16:34
Philip Nguyen
3691421
asked Nov 20 at 16:34
Philip Nguyen
3691421
asked Nov 20 at 16:34
Philip Nguyen
3691421
3691421
add a comment |
add a comment |
1 Answer
1
active
oldest
votes
Instead of a url, you should provide some samples with and without rain:
type People = JsonProvider<"""
[ { "name":"John", "age":94 },
{ "name":"Tomas" } ] """, SampleIsList=true>
for item in People.GetSamples() do
printf "%s " item.Name
item.Age |> Option.iter (printf "(%d)")
printfn ""
The samples above have two records one includes age the other one doesn't. That makes the age field an int option.
From the documentation: http://fsharp.github.io/FSharp.Data/library/JsonProvider.html
answered Nov 20 at 16:50
AMieres
2,100510
Thank you for the help!
– Philip Nguyen
Nov 20 at 19:08
add a comment |
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1 Answer
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votes
1 Answer
1
active
oldest
votes
active
oldest
votes
active
oldest
votes
Instead of a url, you should provide some samples with and without rain:
type People = JsonProvider<"""
[ { "name":"John", "age":94 },
{ "name":"Tomas" } ] """, SampleIsList=true>
for item in People.GetSamples() do
printf "%s " item.Name
item.Age |> Option.iter (printf "(%d)")
printfn ""
The samples above have two records one includes age the other one doesn't. That makes the age field an int option.
From the documentation: http://fsharp.github.io/FSharp.Data/library/JsonProvider.html
answered Nov 20 at 16:50
AMieres
2,100510
Thank you for the help!
– Philip Nguyen
Nov 20 at 19:08
add a comment |
Instead of a url, you should provide some samples with and without rain:
type People = JsonProvider<"""
[ { "name":"John", "age":94 },
{ "name":"Tomas" } ] """, SampleIsList=true>
for item in People.GetSamples() do
printf "%s " item.Name
item.Age |> Option.iter (printf "(%d)")
printfn ""
The samples above have two records one includes age the other one doesn't. That makes the age field an int option.
From the documentation: http://fsharp.github.io/FSharp.Data/library/JsonProvider.html
answered Nov 20 at 16:50
AMieres
2,100510
Thank you for the help!
– Philip Nguyen
Nov 20 at 19:08
add a comment |
Instead of a url, you should provide some samples with and without rain:
type People = JsonProvider<"""
[ { "name":"John", "age":94 },
{ "name":"Tomas" } ] """, SampleIsList=true>
for item in People.GetSamples() do
printf "%s " item.Name
item.Age |> Option.iter (printf "(%d)")
printfn ""
The samples above have two records one includes age the other one doesn't. That makes the age field an int option.
From the documentation: http://fsharp.github.io/FSharp.Data/library/JsonProvider.html
answered Nov 20 at 16:50
AMieres
2,100510
Instead of a url, you should provide some samples with and without rain:
type People = JsonProvider<"""
[ { "name":"John", "age":94 },
{ "name":"Tomas" } ] """, SampleIsList=true>
for item in People.GetSamples() do
printf "%s " item.Name
item.Age |> Option.iter (printf "(%d)")
printfn ""
The samples above have two records one includes age the other one doesn't. That makes the age field an int option.
From the documentation: http://fsharp.github.io/FSharp.Data/library/JsonProvider.html
answered Nov 20 at 16:50
AMieres
2,100510
edited Nov 20 at 17:04
answered Nov 20 at 16:50
AMieres
2,100510
answered Nov 20 at 16:50
AMieres
2,100510
answered Nov 20 at 16:50
AMieres
2,100510
2,100510
Thank you for the help!
– Philip Nguyen
Nov 20 at 19:08
add a comment |
Thank you for the help!
– Philip Nguyen
Nov 20 at 19:08
Thank you for the help!
– Philip Nguyen
Nov 20 at 19:08
Thank you for the help!
– Philip Nguyen
Nov 20 at 19:08
add a comment |
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