feat: implement nullish

Author: MH4GF

src/valibot/index.ts

@@ -78,6 +78,8 @@ function generateFieldTypeValibotSchema(config: ValidationSchemaPluginConfig, vi
 
     if (isNonNullType(parentType))
       return gen;
+
+    return `v.nullish(${gen})`;
   }
   console.warn('unhandled type:', type);
   return '';

tests/valibot.spec.ts

@@ -29,6 +29,33 @@ describe('valibot', () => {
         },
       },
     ],
+    [
+      'nullish',
+      {
+        textSchema: /* GraphQL */ `
+          input PrimitiveInput {
+            a: ID
+            b: String
+            c: Boolean
+            d: Int
+            e: Float
+            z: String! # no defined check
+          }
+        `,
+        wantContains: [
+          'export function PrimitiveInputSchema()',
+          // alphabet order
+          'a: v.nullish(v.string()),',
+          'b: v.nullish(v.string()),',
+          'c: v.nullish(v.boolean()),',
+          'd: v.nullish(v.number()),',
+          'e: v.nullish(v.number()),',
+        ],
+        scalars: {
+          ID: 'string',
+        },
+      },
+    ],
   ])('%s', async (_, { textSchema, wantContains, scalars }) => {
     const schema = buildSchema(textSchema);
     const result = await plugin(schema, [], { schema: 'valibot', scalars }, {});