fix for arrays.

Author: igalklebanov

src/query-builder/function-module.ts

@@ -22,6 +22,7 @@ import {
   IsNever,
   ShallowDehydrateObject,
   ShallowDehydrateValue,
+  Simplify,
 } from '../util/type-utils.js'
 import { AggregateFunctionBuilder } from './aggregate-function-builder.js'
 import { SelectQueryBuilderExpression } from '../query-builder/select-query-builder-expression.js'
@@ -720,9 +721,9 @@ export interface FunctionModule<DB, TB extends keyof DB> {
     DB,
     TB,
     T extends TB
-      ? ShallowDehydrateObject<Selectable<DB[T]>>[]
+      ? Simplify<ShallowDehydrateObject<Selectable<DB[T]>>>[]
       : T extends Expression<infer O>
-        ? ShallowDehydrateObject<O>[]
+        ? Simplify<ShallowDehydrateObject<O>>[]
         : never
   >
 
@@ -760,9 +761,9 @@ export interface FunctionModule<DB, TB extends keyof DB> {
     DB,
     TB,
     T extends TB
-      ? ShallowDehydrateObject<Selectable<DB[T]>>
+      ? Simplify<ShallowDehydrateObject<Selectable<DB[T]>>>
       : T extends Expression<infer O>
-        ? ShallowDehydrateObject<O>
+        ? Simplify<ShallowDehydrateObject<O>>
         : never
   >
 }

src/util/type-utils.ts

@@ -233,8 +233,10 @@ export type ShallowDehydrateObject<O> = {
  *
  * For now, we catch anything in {@link StringsWhenDataTypeNotAvailable} and convert it to `string`.
  */
-export type ShallowDehydrateValue<T> = T extends (infer U)[] | null | undefined
-  ? ShallowDehydrateValue<U>[] | Extract<T, null | undefined>
+export type ShallowDehydrateValue<T> = [T] extends [
+  (infer U)[] | null | undefined,
+]
+  ? Array<ShallowDehydrateValue<U>> | Extract<T, null | undefined>
   : T extends Exclude<T, StringsWhenDataTypeNotAvailable>
     ? T
     : string | Exclude<T, StringsWhenDataTypeNotAvailable>