graphql-go : Use an Object as Input Argument to a Query - go

Question

I'm attempting to pass an object as an argument to a query (rather than a scalar). From the docs it seems that this should be possible, but I can't figure out how to make it work.
I'm using graphql-go, here is the test schema:
var fileDocumentType = graphql.NewObject(graphql.ObjectConfig{
Name: "FileDocument",
Fields: graphql.Fields{
"id": &graphql.Field{
Type: graphql.String,
Resolve: func(p graphql.ResolveParams) (interface{}, error) {
if fileDoc, ok := p.Source.(data_format.FileDocument); ok {
return fileDoc.Id, nil
}
return "", nil
},
},
"tags": &graphql.Field{
Type: graphql.NewList(tagsDataType),
Args: graphql.FieldConfigArgument{
"tags": &graphql.ArgumentConfig{
Type: tagsInputType,
},
},
Resolve: func(p graphql.ResolveParams) (interface{}, error) {
fmt.Println(p.Source)
fmt.Println(p.Args)
if fileDoc, ok := p.Source.(data_format.FileDocument); ok {
return fileDoc.Tags, nil
}
return nil, nil
},
},
},
})
And the inputtype I'm attempting to use (I've tried both an InputObject and a standard Object)
var tagsInputType = graphql.NewInputObject(graphql.InputObjectConfig{
Name: "tagsInput",
Fields: graphql.Fields{
"keyt": &graphql.Field{
Type: graphql.String,
},
"valuet": &graphql.Field{
Type: graphql.String,
},
},
})
And here is the graphql query I'm using to test:
{
list(location:"blah",rule:"blah")
{
id,tags(tags:{keyt:"test",valuet:"test"})
{
key,
value
},
{
datacentre,
handlerData
{
key,
value
}
}
}
}
I'm getting the following error:
wrong result, unexpected errors: [Argument "tags" has invalid value {keyt: "test", valuet: "test"}.
In field "keyt": Unknown field.
In field "valuet": Unknown field.]
The thing is, when I change the type to a string, it works fine. How do I use an object as an input arg?
Thanks!

Answer 1

Had the same issue. Here is what I found from going through the graphql-go source.
The Fields of an InputObject have to be of type InputObjectConfigFieldMap or InputObjectConfigFieldMapThunk for the pkg to work.
So an InputObject would look like this :
var inputType = graphql.NewInputObject(
graphql.InputObjectConfig{
Name: "MyInputType",
Fields: graphql.InputObjectConfigFieldMap{
"key": &graphql.InputObjectFieldConfig{
Type: graphql.String,
},
},
},
)
Modified the Hello World example to take an Input Object :
package main
import (
"encoding/json"
"fmt"
"log"
"github.com/graphql-go/graphql"
)
func main() {
// Schema
var inputType = graphql.NewInputObject(
graphql.InputObjectConfig{
Name: "MyInputType",
Fields: graphql.InputObjectConfigFieldMap{
"key": &graphql.InputObjectFieldConfig{
Type: graphql.String,
},
},
},
)
args := graphql.FieldConfigArgument{
"foo": &graphql.ArgumentConfig{
Type: inputType,
},
}
fields := graphql.Fields{
"hello": &graphql.Field{
Type: graphql.String,
Args: args,
Resolve: func(p graphql.ResolveParams) (interface{}, error) {
fmt.Println(p.Args)
return "world", nil
},
},
}
rootQuery := graphql.ObjectConfig{
Name: "RootQuery",
Fields: fields,
}
schemaConfig := graphql.SchemaConfig{Query: graphql.NewObject(rootQuery)}
schema, err := graphql.NewSchema(schemaConfig)
if err != nil {
log.Fatalf("failed to create new schema, error: %v", err)
}
// Query
query := `
{
hello(foo:{key:"blah"})
}
`
params := graphql.Params{Schema: schema, RequestString: query}
r := graphql.Do(params)
if len(r.Errors) > 0 {
log.Fatalf("failed to execute graphql operation, errors: %+v", r.Errors)
}
rJSON, _ := json.Marshal(r)
fmt.Printf("%s \n", rJSON) // {“data”:{“hello”:”world”}}
}