Issues with Default Values in Prisma Config Schema Using Effect-Smol Library

Hello, I stumbled into some problems while trying to expand the

@prisma/config

@prisma/config

effect/Schema definitions with union types with default values.

For context, I want to parse one of the two alternatives in

SchemaEngineConfig

SchemaEngineConfig

type SchemaEngineConfig =
  | {
    engine: 'classic', // this should be the default value, if not specified
    datasource?: { /* ... */}
  | {
    engine: 'js',
    adapter: async () => { /* ... */}
  }

type PrismaConfig = {
  // ...
} & SchemaEngineConfig

type SchemaEngineConfig =
  | {
    engine: 'classic', // this should be the default value, if not specified
    datasource?: { /* ... */}
  | {
    engine: 'js',
    adapter: async () => { /* ... */}
  }

type PrismaConfig = {
  // ...
} & SchemaEngineConfig

and have

effect/Schema

effect/Schema

parse the default

{ engine: 'classic', datasource: undefined }

{ engine: 'classic', datasource: undefined }

value when the user doesn't specify any

SchemaEngineConfig

SchemaEngineConfig

.

I can't find a way to reliable set default constructors in

Schema.Union

Schema.Union

values that are merged into a

Schema.Struct

Schema.Struct

. I heard that

effect-smol

effect-smol

makes things simpler in that regard, so I decided to try the new APIs out (https://pkg.pr.new/Effect-TS/effect-smol/effect@73e2109).

It seems that piping

Schema.withConstructorDefault

Schema.withConstructorDefault

to a

Struct

Struct

breaks

Struct.mapFields

Struct.mapFields

, while piping it to a

TaggedUnion

TaggedUnion

breaks

Union.mapMembers

Union.mapMembers

. Chances are I'm holding something wrong. I can only get the code to compile and run when no

Schema.withConstructorDefault

Schema.withConstructorDefault

is used, but that implies I'm not getting the default value I wanted.

Here's a self-contained script with what I tried, with TODO comments: https://gist.github.com/jkomyno/30862bd7d0630d2a861538fcb843dc92

Any help is appreciated

Issues with Default Values in Prisma Config Schema Using Effect-Smol Library

Hello, I stumbled into some problems while trying to expand the

@prisma/config

@prisma/config

effect/Schema definitions with union types with default values.

For context, I want to parse one of the two alternatives in

SchemaEngineConfig

SchemaEngineConfig

type SchemaEngineConfig =
  | {
    engine: 'classic', // this should be the default value, if not specified
    datasource?: { /* ... */}
  | {
    engine: 'js',
    adapter: async () => { /* ... */}
  }

type PrismaConfig = {
  // ...
} & SchemaEngineConfig

type SchemaEngineConfig =
  | {
    engine: 'classic', // this should be the default value, if not specified
    datasource?: { /* ... */}
  | {
    engine: 'js',
    adapter: async () => { /* ... */}
  }

type PrismaConfig = {
  // ...
} & SchemaEngineConfig

and have

effect/Schema

effect/Schema

parse the default

{ engine: 'classic', datasource: undefined }

{ engine: 'classic', datasource: undefined }

value when the user doesn't specify any

SchemaEngineConfig

SchemaEngineConfig

.

I can't find a way to reliable set default constructors in

Schema.Union

Schema.Union

values that are merged into a

Schema.Struct

Schema.Struct

. I heard that

effect-smol

effect-smol

makes things simpler in that regard, so I decided to try the new APIs out (https://pkg.pr.new/Effect-TS/effect-smol/effect@73e2109).

It seems that piping

Schema.withConstructorDefault

Schema.withConstructorDefault

to a

Struct

Struct

breaks

Struct.mapFields

Struct.mapFields

, while piping it to a

TaggedUnion

TaggedUnion

breaks

Union.mapMembers

Union.mapMembers

. Chances are I'm holding something wrong. I can only get the code to compile and run when no

Schema.withConstructorDefault

Schema.withConstructorDefault

Issues with Default Values in Prisma Config Schema Using Effect-Smol Library

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