schema-codegen should generate mutation methods

[c0dezer019]

Feature Request Type

• [ ] Core functionality
• [x] Alteration (enhancement/optimization) of existing feature(s)
• [ ] New behavior

Description

What it does

schema-codegen currently generates the following from the schema:

import strawberry

@strawberry.type
class Member:
    username: str

@strawberry.type
class Query:
    member: Member | None

@strawberry.type
class Mutation:
    create_user: Member

schema = strawberry.Schema(query=Query, mutation=Mutation)

Here's the schema for reference:

schema {
    query: Query
    mutation: Mutation
}

type Member {
    username: String!
}

type Query {
    member: Member
}

type Mutation {
    createMember(name: String!): Member!
}

What it should do

Instead, it should generate the following for our mutations:

@strawberry.type
class Mutation:
    @strawberry.mutation
    def create_member(self, name: str) -> Member:
        return Member(name=name)

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[patrick91]

One note on this, we'll probably generate an empty method instead of what you wrote, as it won't be easy to generate something that's actually valid (and useful)

@strawberry.type
class Mutation:
    @strawberry.mutation
    def create_member(self, name: str) -> Member:
        ...