Json.net JObject.Parse erroring on complex json - json

Question

The following code:
let resp = string(argv.GetValue 0)
let json =JObject.Parse resp
gives this error:
An unhandled exception of type 'Newtonsoft.Json.JsonReaderException'
occurred in Newtonsoft.Json.dll
Input string '2.2.6' is not a valid number.
Path 'items[0].versionName', line 1, position 39.
where argv is this input:
{
"totalCount":1,
"items":[
{
"versionName":"2.2.6",
"phase":"PLANNING",
"distribution":"EXTERNAL",
"source":"CUSTOM",
"_meta":{
"allow":[
"GET",
"PUT",
"DELETE"
],
"href":"url",
"links":[
{
"rel":"versionReport",
"href":"url"
},
{
"rel":"project",
"href":"url"
},
{
"rel":"policy-status",
"href":"url"
}
]
}
}
]
}
How can I fix this? Is there a simple way to implement a json reader that does not error here?
I also get this error:
An unhandled exception of type 'Newtonsoft.Json.JsonReaderException'
occurred in Newtonsoft.Json.dll
Error parsing undefined value. Path 'items[0].name', line 1, position 28.
With this input:
{
"totalCount":1,
"items":[
{
"name":"uaa",
"projectLevelAdjustments":true,
"source":"CUSTOM",
"_meta":{
"allow":[
"GET",
"PUT",
"DELETE"
],
"href":"url",
"links":[
{
"rel":"versions",
"href":"url"
},
{
"rel":"canonicalVersion",
"href":"url"
}
]
}
}
]
}
I am trying to read in json of many different schemas that I did not make or know. The first error seems to be because it is trying to generate a float from something that should be output as a string. The second sounds like the schema is too complex and a type would be needed to properly parse it using Json.Deserialize but I'm not sure how to do that and it would take too much time as there are too many schemas to make a types for them all. Is there any way around both these things?

Answer 1

In C# you can use dynamic with something like this:
var json = JsonConvert.DeserializeObject(resp)
And then you could access properties with something like: json.totalCount.
In F# land, this question gives some suggestions for how you might deal with dynamic objects. If you use the package FSharp.Interop.Dynamic you can get the value of totalCount in your example with something like this:
let value:obj = json?totalCount?Value
which gives 1L on my computer.