Nexus-Prisma-like CRUD generation

[saphewilliam]

This is the second of two Pull Requests (previous: #6) implementing the desired nexus-prisma-like feature set as discussed in #4

This PR contains:

• Updated CRUD generation to support adding to and modifying the generated code
• Docs (README.md) update with example code.
• Some minor code cleanup (made useTemplate type-safe, cleaned up filesystem code)

This PR does not contain:

• Updated tests
• Updated logging
• Updated examples

[saphewilliam]

Still TODO: I think we should expose all object fields as their own objects aswell, which would allow for easy field modification

Current situation:

export const UserObject = definePrismaObject('User', {
  description: undefined,
  findUnique: ({ id }) => ({ id }),
  fields: (t) => ({
    id: t.exposeID('id', { description: '@Pothos.omit(create, update)', nullable: false }),
    createdAt: t.field({
      type: Inputs.DateTime,
      description: '@Pothos.omit(create, update)',
      nullable: false,
      resolve: (parent) => parent.createdAt,
    }),
  }),
});

Desired situation:

export const UserIdField = defineIdField({
  description: '@Pothos.omit(create, update)',
  nullable: false
});

export const UserCreatedAtField = defineField({
  type: Inputs.DateTime,
  description: '@Pothos.omit(create, update)',
  nullable: false,
  resolve: (parent) => parent.createdAt,
});

export const UserObject = definePrismaObject('User', {
  description: undefined,
  findUnique: ({ id }) => ({ id }),
  fields: (t) => ({
    id: t.exposeID('id', UserIdField),
    createdAt: t.field(UserCreatedAtField),
  }),
});

[saphewilliam]

Still TODO: I think we should expose all object fields as their own objects aswell, which would allow for easy field modification.

This is now resolved and added to documentation! IMO it's ready for review and merge.

[Cauen]

Hi @saphewilliam I'm really happy to see the improvements you've made here.

I tested it a few days ago, and I didn't have time to formulate a message about the improvements I was going to suggest. But you already made them