fix: Combine scalars option with nullable relation filter

Taskfile

@@ -25,36 +25,36 @@ compatibilty_check() {
   set -x
   rm -rf ./@generated && npm run prisma:g && npm run tscheck
 
-  echo Check noAtomicOperations
+  echo === Check noAtomicOperations ===
   sed -i 's/noAtomicOperations *= false/noAtomicOperations = true/g' prisma/schema.prisma
   rm -rf ./@generated && npm run prisma:g && npm run tscheck
   sed -i 's/noAtomicOperations *= true/noAtomicOperations = false/g' prisma/schema.prisma
 
-  echo Check combineScalarFilters
+  echo === Check combineScalarFilters ===
   sed -i 's/combineScalarFilters *= false/combineScalarFilters = true/g' prisma/schema.prisma
   rm -rf ./@generated && npm run prisma:g && npm run tscheck
   sed -i 's/combineScalarFilters *= true/combineScalarFilters = false/g' prisma/schema.prisma
 
-  echo Check Switching reExport
+  echo === Switching reExport ===
   sed -i 's/reExport *= None/reExport = All/g' prisma/schema.prisma
   rm -rf ./@generated && npm run prisma:g && npm run tscheck
   sed -i 's/reExport *= All/reExport = None/g' prisma/schema.prisma
 
-  echo Check emitSingle
+  echo === Check emitSingle ===
   sed -i 's/emitSingle *= false/emitSingle = true/g' prisma/schema.prisma
   rm -rf ./@generated && npm run prisma:g
   npx tsc --noEmit --skipLibCheck --experimentalDecorators ./@generated/index.ts
   npx ts-node ./@generated/index.ts
 
-  echo Check emitCompiled
+  echo === Check emitCompiled ===
   sed -i 's/emitCompiled *= false/emitCompiled = true/g' prisma/schema.prisma
   rm -rf ./@generated && npm run prisma:g
   node ./@generated/index.js
 
   sed -i 's/emitCompiled *= true/emitCompiled = false/g' prisma/schema.prisma
   sed -i 's/emitSingle *= true/emitSingle = false/g' prisma/schema.prisma
 
-  echo Check requireSingleFieldsInWhereUniqueInput
+  echo === Check requireSingleFieldsInWhereUniqueInput ===
   sed -i 's/requireSingleFieldsInWhereUniqueInput *= false/requireSingleFieldsInWhereUniqueInput = true/g' prisma/schema.prisma
   rm -rf ./@generated && npm run prisma:g && npm run tscheck
   sed -i 's/requireSingleFieldsInWhereUniqueInput *= true/requireSingleFieldsInWhereUniqueInput = false/g' prisma/schema.prisma

src/handlers/combine-scalar-filters.ts

@@ -40,7 +40,7 @@ function beforeGenerateField(field: DMMF.SchemaArg): void {
 }
 
 function replaceBogus(name: string) {
-  return name.replaceAll(/(Nullable|Nested)/g, '');
+  return name.replaceAll(/Nullable|Nested/g, '');
 }
 
 function isContainBogus(name: string) {
@@ -66,7 +66,7 @@ function isScalarFilter(inputType: InputType) {
 }
 
 function postBegin(args: EventArguments) {
-  const { schema } = args;
+  const { schema, modelNames } = args;
   const inputTypes = schema.inputObjectTypes.prisma;
   const enumTypes = schema.enumTypes.model || [];
   const types = [
@@ -117,5 +117,11 @@ function postBegin(args: EventArguments) {
     ]);
   }
 
+  for (const modelName of modelNames) {
+    replaceBogusFilters(`${modelName}RelationFilter`, [
+      `${modelName}NullableRelationFilter`,
+    ]);
+  }
+
   remove(inputTypes, inputType => isContainBogus(inputType.name));
 }

src/test/combine-scalar-filters.spec.ts

@@ -235,3 +235,26 @@ describe('combine scalar filters on array', () => {
     'no errors';
   });
 });
+
+describe('empty relation filter input', () => {
+  before(async () => {
+    ({ project, sourceFiles } = await testGenerate({
+      schema: `
+        model Article {
+          id             String    @id @default(cuid())
+          comments       Comment[]
+        }
+        model Comment {
+          id        String   @id @default(cuid())
+          article   Article? @relation(fields: [articleId], references: [id])
+          articleId String?
+        }
+        `,
+      options: [`combineScalarFilters = true`],
+    }));
+  });
+
+  it('smoke', () => {
+    'no errors';
+  });
+});