bugfix: allow empty array default

packages/schema/src/language-server/validator/attribute-application-validator.ts

@@ -179,12 +179,31 @@ function assignableToAttributeParam(arg: AttributeArg, param: AttributeParam, at
 
     let dstType = param.type.type;
     let dstIsArray = param.type.array;
+
+    if (dstType === 'ContextType') {
+        // ContextType is inferred from the attribute's container's type
+        if (isDataModelField(attr.$container)) {
+            dstIsArray = attr.$container.type.array;
+        }
+    }
+
     const dstRef = param.type.reference;
 
     if (dstType === 'Any' && !dstIsArray) {
         return true;
     }
 
+    if (argResolvedType.decl === 'Any') {
+        // arg is any type
+        if (!argResolvedType.array) {
+            // if it's not an array, it's assignable to any type
+            return true;
+        } else {
+            // otherwise it's assignable to any array type
+            return argResolvedType.array === dstIsArray;
+        }
+    }
+
     // destination is field reference or transitive field reference, check if
     // argument is reference or array or reference
     if (dstType === 'FieldReference' || dstType === 'TransitiveFieldReference') {

tests/integration/tests/regression/issue-947.test.ts

@@ -0,0 +1,19 @@
+import { loadModel } from '@zenstackhq/testtools';
+
+describe('Regression: issue 947', () => {
+    it('regression', async () => {
+        await loadModel(
+            `
+            model Test {
+                id    String @id
+                props TestEnum[] @default([])
+              }
+
+            enum TestEnum {
+                A
+                B
+            }
+            `
+        );
+    });
+});