fix(zod): support @default for BigInt values

Zod schemas fail to generate when using a `BigInt` type and
a `@default` field, since generated Zod files use a `number` literal
instead of a `BigInt` literal for the default value.

Author: aloisklink

packages/schema/src/plugins/zod/utils/schema-gen.ts

@@ -152,7 +152,13 @@ export function makeFieldSchema(field: DataModelField) {
     } else {
         const schemaDefault = getFieldSchemaDefault(field);
         if (schemaDefault !== undefined) {
-            schema += `.default(${schemaDefault})`;
+            if (field.type.type === 'BigInt') {
+                // we can't use the `n` BigInt literal notation, since it needs
+                // ES2020 or later, which TypeScript doesn't use by default
+                schema += `.default(BigInt("${schemaDefault}"))`;
+            } else {
+                schema += `.default(${schemaDefault})`;
+            }
         }
 
         if (field.type.optional) {

tests/integration/tests/plugins/zod.test.ts

@@ -61,6 +61,7 @@ describe('Zod plugin tests', () => {
             authorId Int?
             published Boolean @default(false)
             viewCount Int @default(0)
+            viewMilliseconds BigInt @default(0)
         }
         `,
             { addPrelude: false, pushDb: false }
@@ -188,11 +189,13 @@ describe('Zod plugin tests', () => {
         expect(schemas.PostPrismaCreateSchema.safeParse({ title: 'a' }).success).toBeFalsy();
         expect(schemas.PostPrismaCreateSchema.safeParse({ title: 'abcde' }).success).toBeTruthy();
         expect(schemas.PostPrismaCreateSchema.safeParse({ viewCount: 1 }).success).toBeTruthy();
+        expect(schemas.PostPrismaCreateSchema.safeParse({ viewMilliseconds: 1n }).success).toBeTruthy();
 
         expect(schemas.PostPrismaUpdateSchema.safeParse({ title: 'a' }).success).toBeFalsy();
         expect(schemas.PostPrismaUpdateSchema.safeParse({ title: 'abcde' }).success).toBeTruthy();
         expect(schemas.PostPrismaUpdateSchema.safeParse({ viewCount: 1 }).success).toBeTruthy();
         expect(schemas.PostPrismaUpdateSchema.safeParse({ viewCount: { increment: 1 } }).success).toBeTruthy();
+        expect(schemas.PostPrismaUpdateSchema.safeParse({ viewMilliseconds: 1n }).success).toBeTruthy();
     });
 
     it('mixed casing', async () => {