Angular CLI生成组件报错：Could not find an NgModule问题求助

Hey there, let's get that component generation working again! The error you're seeing happens because the Angular CLI needs to access your project's core configuration files and locate the root NgModule (usually app.module.ts) to register the new component—and you're running the command from the wrong directory.

Here's the step-by-step fix: #

1. Navigate back to your project root directory (the frontend folder, not frontend/src/app):

   cd ../..
   

   Or if you opened a new terminal, just navigate directly to the frontend folder where your angular.json file lives.

2. Run the component generation command again:

   ng generate component about
   

   This time, the CLI will find your app.module.ts file in src/app automatically and add the new AboutComponent to its declarations array.

Alternative: Generate from the subdirectory (if you prefer) #

If you want to stay in frontend/src/app while generating the component, you can explicitly tell the CLI where to find the NgModule using the --module flag:

ng generate component about --module ./app.module.ts

Why this happens #

When you run ng generate from src/app, the CLI can't locate your project's root configuration (angular.json) or properly resolve the path to the root NgModule. Angular CLI expects to be run from the project root (where angular.json is stored) by default to access all necessary project settings.

Quick check to confirm #

Make sure your frontend/src/app folder contains an app.module.ts file—this is automatically created by ng new, so it should be there. If it's missing for some reason, you'd need to recreate it, but that's unlikely given you just ran ng new.

内容的提问来源于stack exchange，提问作者Jeffrey Klinkhamer