Here is the error I get when I attempted to access a boolean field:
• Expecting one more argument to ‘Boolean’
Expected a type, but ‘Boolean’ has kind ‘Bool -> ScalarValue’
• In the first argument of ‘Maybe’, namely ‘Boolean’
In the type ‘(Maybe Boolean)’
In the definition of data constructor ‘CharacterCreature’
Side note : it requires DataKinds extensions to get this error. Without DataKinds error is:
Not in scope: type constructor or class ‘Boolean’
A data constructor of that name is in scope; did you mean DataKinds?
Example schema and code below:
simple.gql :
type Query {
deity (name: [[[[[String!]]!]]], mythology: Realm): Deity!
character (characterID: String! , age: Int ): Character!
hero: Human!
}
interface MyInterface {
name: String
}
type Mutation {
createDeity (name: [[[[[String!]]!]]], mythology: String): Deity!
createCharacter (realm: Realm! , id: String! ): Character!
}
union Character = Creature | Deity | Human
type Deity {
fullName: String!
power: Power
}
type Creature {
creatureName: String!
realm: City!
test: Boolean
}
type Human {
humanName: String!
lifetime: Lifetime!
profession: Profession
}
enum Profession {
Priest
Farmer
Artist
}
input Realm {
owner: String!
age: Int
realm: Realm
profession: Profession
}
enum City {
Athens
Ithaca
Sparta Troy
}
scalar Lifetime
scalar PowerFailing haskell code:
defineByDocumentFile "./schema.gql"
[gql|
query Character($id: String!) {
character(characterID: $id) {
...on Creature {
test
}
}
}
|]
Here is the error I get when I attempted to access a boolean field:
Side note : it requires
DataKindsextensions to get this error. WithoutDataKindserror is:Example schema and code below:
simple.gql :
Failing haskell code: