fix(graphql): plugin crashes when import * as is used #2441

Author: kamilmysliwiec

packages/graphql/lib/plugin/utils/ast-utils.ts

@@ -149,15 +149,26 @@ export function getDecoratorName(decorator: Decorator) {
   const isDecoratorFactory =
     decorator.expression.kind === SyntaxKind.CallExpression;
   if (isDecoratorFactory) {
-    const callExpression = decorator.expression;
-    const identifier = (callExpression as CallExpression)
-      .expression as Identifier;
-    if (isDynamicallyAdded(identifier)) {
-      return undefined;
+    const callExpression = decorator.expression as ts.CallExpression;
+
+    if (
+      callExpression.expression?.kind === ts.SyntaxKind.PropertyAccessExpression
+    ) {
+      // When "import * as _" is used
+      const propertyAccessExpression =
+        callExpression.expression as PropertyAccessExpression;
+      return getIdentifierFromName(propertyAccessExpression.name).getText();
+    }
+
+    if (callExpression.kind === ts.SyntaxKind.CallExpression) {
+      const identifier = (callExpression as CallExpression)
+        .expression as Identifier;
+
+      if (isDynamicallyAdded(identifier)) {
+        return undefined;
+      }
+      return getIdentifierFromName(identifier).getText();
     }
-    return getIdentifierFromName(
-      (callExpression as CallExpression).expression,
-    ).getText();
   }
   return getIdentifierFromName(decorator.expression).getText();
 }

packages/graphql/tests/plugin/fixtures/create-cat.dto.ts

@@ -1,4 +1,6 @@
 export const createCatDtoText = `
+import * as gql from "@nestjs/graphql";
+
 enum Status {
     ENABLED,
     DISABLED
@@ -12,6 +14,7 @@ interface Node {
     id: number;
 }
 
+@gql.InputType()
 @ObjectType()
 export class CreateCatDto {
   name: string;
@@ -69,7 +72,8 @@ export class CreateCatArgs {
 }
 `;
 
-export const createCatDtoTextTranspiled = `var Status;
+export const createCatDtoTextTranspiled = `import * as gql from "@nestjs/graphql";
+var Status;
 (function (Status) {
     Status[Status["ENABLED"] = 0] = "ENABLED";
     Status[Status["DISABLED"] = 1] = "DISABLED";
@@ -91,6 +95,7 @@ __decorate([
     HideField()
 ], CreateCatDto.prototype, "hidden", void 0);
 CreateCatDto = __decorate([
+    gql.InputType(),
     ObjectType()
 ], CreateCatDto);
 export { CreateCatDto };