Gqlgen: panic: interface conversion: types.Type is types.Basic, not types.Named

Created on 27 Apr 2019 · 12Comments · Source: 99designs/gqlgen

Got a panic when i tried to `go run github.com/99designs/gqlgen`

I expected the codes to be generated without any issue/error

schema.graphql seems fine

versions

gqlgen version? v0.8.3
go version? - go version go1.12.1 linux/amd64
dep or go modules? - Go modules

panic output


panic: interface conversion: types.Type is *types.Basic, not *types.Named

goroutine 1 [running]:
github.com/99designs/gqlgen/codegen.(*builder).bindField(0xc0010e18e8, 0xc000915880, 0xc00013d320, 0x0, 0x0)
        /home/adigun/GoApps/pkg/mod/github.com/99designs/[email protected]/codegen/field.go:111 +0x103d
github.com/99designs/gqlgen/codegen.(*builder).buildField(0xc0010e18e8, 0xc000915880, 0xc00026e4d0, 0x0, 0xe9ca00, 0x0)
        /home/adigun/GoApps/pkg/mod/github.com/99designs/[email protected]/codegen/field.go:64 +0x31d
github.com/99designs/gqlgen/codegen.(*builder).buildObject(0xc0010e18e8, 0xc0000b4e40, 0x9db536, 0x6, 0x0)
        /home/adigun/GoApps/pkg/mod/github.com/99designs/[email protected]/codegen/object.go:73 +0x4ec
github.com/99designs/gqlgen/codegen.BuildData(0xc0002120c0, 0xab5c40, 0xe9ba48, 0x0)
        /home/adigun/GoApps/pkg/mod/github.com/99designs/[email protected]/codegen/data.go:84 +0x461
github.com/99designs/gqlgen/api.Generate(0xc0002120c0, 0x0, 0x0, 0x0, 0x0, 0xa1c290)
        /home/adigun/GoApps/pkg/mod/github.com/99designs/[email protected]/api/generate.go:37 +0x253
github.com/99designs/gqlgen/cmd.glob..func1(0xc00021a000)
        /home/adigun/GoApps/pkg/mod/github.com/99designs/[email protected]/cmd/gen.go:39 +0xa2
github.com/urfave/cli.HandleAction(0x91f560, 0xa1b560, 0xc00021a000, 0xc0000724e0, 0x0)
        /home/adigun/GoApps/pkg/mod/github.com/urfave/[email protected]/app.go:492 +0x7c
github.com/urfave/cli.(*App).Run(0xc000210000, 0xc000094190, 0x1, 0x1, 0x0, 0x0)
        /home/adigun/GoApps/pkg/mod/github.com/urfave/[email protected]/app.go:264 +0x590
github.com/99designs/gqlgen/cmd.Execute()
        /home/adigun/GoApps/pkg/mod/github.com/99designs/[email protected]/cmd/root.go:40 +0x224
main.main()
        /home/adigun/GoApps/pkg/mod/github.com/99designs/[email protected]/main.go:8 +0x20
exit status 2

gqlgen.yml


schema:
- schema.graphql
exec:
  filename: server/generated.go
model:
  filename: server/models_gen.go
resolver:
  filename: server/resolver.go
  type: Resolver

bug v0.9

Source

adigunhammedolalekan

👍2

All 12 comments

I am experiencing this problem too

darmie on 27 Apr 2019

This is a bad error message for sure, but it's not clear what the cause is. Can you please provide the schema you used for this?

mathewbyrne on 1 May 2019

Am currently facing this issues and am new to GoLang so it;s a bit more difficult to debug

My schema ;

schema {
    query: Query
    mutation: Mutation 
}

type Query {
    outlet(id: ID!): [Outlet]
    user(id: ID!): [User]
    technician(id: ID!): [Technician]
}

type Mutation {
    createOutlet(input: NewOutlet!): Outlet!
    createUser(input: NewUser!): User!
}


type Outlet {
    id: ID!
    name: String!
    images: String!
    location: String!
    description: String!
    state: String!
    country: String!
    email: String!
    helpline: String!
    owner: User!
    technician: Technician!
}

type Technician {
    id: ID!
    name: String!
    image: String!
    location: String!
    state: String!
    country: String!
    email: String!
    helpline: String!
    price: String!
    outlet: Outlet!
}

type User {
    id: ID!
    name: String!
    image: String!
    email: String!
    outlet: Outlet!
}


input NewOutlet {
    id: ID!
    name: String!
    images: String!
    location: String!
    description: String!
    state: String!
    country: String!
    email: String!
    helpline: String!
}

input NewUser {
    name: String
}

vickywane on 6 May 2019

@darmie @adigunhammedolalekan any help on how you fixed your's ?

Or what you did wrong to generate that error ?

vickywane on 6 May 2019

@vickywane the problem is due to one of the relationships.

I debugged it by adding each field line by line till I found the culprit. Making the field an array fixed the problem.

darmie on 6 May 2019

I suspect that the problem in your case is coming from the relationships between Outlet and User or Technician. @vickywane . The generator is probably having a hard time creating the relationships in Golang. Try and be creative the fields and see which one fixes the problem

darmie on 6 May 2019

Alright . When i tried a simpler model it worked . I'll make adjustments and try again .

vickywane on 7 May 2019

I remodeled my schema to look like this ;

schema {
    query: Query
    mutation: Mutation 
}

type Query {
    outlet(id: ID): [Outlet]
    maintainer(id: ID): [Maintainer]
    technician(id: ID): [Technician]
}

type Mutation {
    createOutlet(input: NewOutlet!): Outlet!
    createMaintainer(input: newMaintainer!): Maintainer!
}


type Outlet {
    id: ID!
    name: String!
    images: String!
    location: String!
    description: String!
    state: String!
    country: String!
    email: String!
    helpline: String!
}

type Technician {
    id: ID!
    name: String!
    image: String!
    location: String!
    state: String!
    country: String!
    email: String!
    helpline: String!
    price: String!
    outlet: Outlet!
}

type Maintainer {
    id: ID!
    name: String!
    image: String!
    email: String!
    outlet: Outlet!
}


input NewOutlet {
    id: ID!
    name: String!
    images: String!
    location: String!
    description: String!
    state: String!
    country: String!
    email: String!
    helpline: String!
}

input newMaintainer {
    id: Int
    name: String
    image: String
    email: String
}

However whenever i add
owner: Maintainer! technician: Technician!
as relationships to Outlet i get the original error and am left wondering why so ... Since other relationships work

vickywane on 7 May 2019

@vickywane have you tried my suggestion? set the relationship field types as an array

owner: [Maintainer!]
technician: [Technician!]

see if it works

darmie on 7 May 2019

❤1

@darmie That fixed it .. thanks . However, i didn't want those field to contain arrays.

vickywane on 7 May 2019

Yes, the sacrifices we have to make lol. Just make sure the array contains a single item.

darmie on 7 May 2019

😄1

Had the same error message; for me it was because I had a func with the same name as a GQL type in my schema (func New...() in my model and input New... in my GQL schema).