Hi all,
Thanks again for all your help. And when I've asked questions last year.
I have another question. Here's my situation. I want to pass a json from a
port, and decode the json into records.
My port:
port parseSuccess : (Json.Encode.Value -> msg) -> Sub msg
When calling it:
app.ports.parseSuccess.send(JSON.stringify(cst.toAst()))
The recursive record:
type alias Node = {
> name : String
> , children : Children
> }
>
> type Children =
> Children (List Node)
The fromJson to decode the Json.
fromJson : Json.Value -> Result String Node
> fromJson json =
> Json.decodeValue nodeDecoder json
>
My decoders:
nodeDecoder : Decoder Node
> nodeDecoder =
> object2 Node
> ("name" := string)
> ("children" := childrenDecoder )
>
childrenDecoder : Decoder Children
> childrenDecoder =
> customDecoder
> (Json.list nodeDecoder)
> (\children -> Result.Ok <| Children children)
When I run it, I get an error in the Result in "fromJson"
: Err "Expecting an object with a field named `name` but instead got:
\"{\\\"name\\\":\\\"WhereClause\\\",\\\"children\\\":[{\\\"name\\\":\\\"ComparisonPredicate\\\",\\\"children\\\":[\\\"age\\\",{\\\"name\\\":\\\"ComparisonPredicatePart2\\\",\\\"children\\\":[\\\"<\\\",\\\"10\\\"]}]}]}\""
What's the difference between Json.Encoder.Value and a String? When I'm
calling the port on the JS side, I'm sending a string from
JSON.stringify(). It seems like it comes in as Json.Encoder.Value as the
type, but according to the error, it seems like it's coming in as a string.
What am I doing wrong?
Wil
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