From f340a7d4f3f5dc8d34df40a5057ed4f1eff29784 Mon Sep 17 00:00:00 2001
From: ymc9 <104139426+ymc9@users.noreply.github.com>
Date: Wed, 11 Oct 2023 13:32:59 -0700
Subject: [PATCH] fix: allow models without field declarations

---
 packages/language/src/generated/grammar.ts    |  2 +-
 packages/language/src/zmodel.langium          |  2 +-
 packages/schema/tests/schema/abstract.test.ts | 19 +++++++++++++++++++
 3 files changed, 21 insertions(+), 2 deletions(-)

diff --git a/packages/language/src/generated/grammar.ts b/packages/language/src/generated/grammar.ts
index f62c3d091..986be8c33 100644
--- a/packages/language/src/generated/grammar.ts
+++ b/packages/language/src/generated/grammar.ts
@@ -2060,7 +2060,7 @@ export const ZModelGrammar = (): Grammar => loadedZModelGrammar ?? (loadedZModel
                 }
               }
             ],
-            "cardinality": "+"
+            "cardinality": "*"
           },
           {
             "$type": "Keyword",
diff --git a/packages/language/src/zmodel.langium b/packages/language/src/zmodel.langium
index b7f13466e..45bd3034f 100644
--- a/packages/language/src/zmodel.langium
+++ b/packages/language/src/zmodel.langium
@@ -186,7 +186,7 @@ DataModel:
     '{' (
         fields+=DataModelField
             | attributes+=DataModelAttribute
-        )+
+        )*
     '}';
 
 DataModelField:
diff --git a/packages/schema/tests/schema/abstract.test.ts b/packages/schema/tests/schema/abstract.test.ts
index a3364bc2e..621e7998a 100644
--- a/packages/schema/tests/schema/abstract.test.ts
+++ b/packages/schema/tests/schema/abstract.test.ts
@@ -9,4 +9,23 @@ describe('Abstract Schema Tests', () => {
         });
         await loadModel(content);
     });
+
+    it('empty inheritance', async () => {
+        await loadModel(`
+        datasource db {
+            provider = 'postgresql'
+            url = env('DATABASE_URL')
+        }
+        
+        generator js {
+            provider = 'prisma-client-js'
+        }
+        
+        abstract model Base {
+            id Int @id @default(autoincrement())
+        }
+
+        model Foo extends Base {}
+        `);
+    });
 });