fix: additional fix for 1667 (#1679)

Author: ymc9

packages/schema/src/plugins/enhancer/enhance/index.ts

@@ -144,12 +144,18 @@ ${
             return '@zenstackhq/runtime/zod';
         }
 
+        if (!this.options.output) {
+            // I don't have a custom output, but zod has, CLI will still generate
+            // a copy into the default output, so we can still import from there
+            return './zod';
+        }
+
         // both zod and me have custom output, resolve to relative path and import
         const schemaDir = path.dirname(this.options.schemaPath);
         const zodAbsPath = path.isAbsolute(zodCustomOutput)
             ? zodCustomOutput
             : path.resolve(schemaDir, zodCustomOutput);
-        return path.relative(this.outDir, zodAbsPath);
+        return path.relative(this.outDir, zodAbsPath) || '.';
     }
 
     private createSimplePrismaImports(prismaImport: string) {

tests/regression/tests/issue-1667.test.ts

@@ -57,4 +57,30 @@ describe('issue 1667', () => {
             { addPrelude: false, getPrismaOnly: true, generateNoCompile: true, compile: true }
         );
     });
+
+    it('standard enhance custom zod output', async () => {
+        await loadSchema(
+            `
+            generator client {
+                provider = "prisma-client-js"
+            }
+
+            datasource db {
+                provider = "sqlite"
+                url      = "file:./dev.db"
+            }            
+
+            plugin zod {
+                provider = '@core/zod'
+                output = './myzod'
+            }
+
+            model User {
+                id Int @id
+                email String @unique @email
+            }
+            `,
+            { addPrelude: false, getPrismaOnly: true, compile: true }
+        );
+    });
 });