在frontend同级目录创建Rails应用失败，请求技术支持

Hey Jake, let's walk through the problems you're facing and get your project up and running smoothly.

Core Error Breakdown #

That Can't initialize a new Rails application within the directory of another... error happens for two key reasons:

• Rails detects existing Rails project files (like Gemfile, the config/ folder) in your current or parent directory
• You’re trying to create a Rails app inside a folder that shares the same name as the app itself

From your steps, this popped up because you were nesting app creation (e.g., running rails new new_project inside an existing backend folder) or reusing folder names that confused Rails’s directory detection.

Step-by-Step Solutions #

1. Match Your Remote Repository’s Structure #

Your remote repo already has a backend folder designated for the Rails app—let’s use that directly instead of creating nested directories:

1. After cloning the remote repo, navigate to your project root:

   cd new_project
   

2. If the existing backend folder is empty, delete it first:

   rm -rf backend
   

3. Create your Rails app directly into the backend folder (this aligns perfectly with your repo’s structure):

   rails new backend
   

   This command generates all Rails files right into the backend directory, no nesting, no conflicts.

2. Fix Desktop Directory Creation Failure #

The fact that creating the app works in Documents but not Desktop points to either permission issues, hidden system files interfering, or special characters in the path. Try these fixes:

• First, check for hidden Rails/Git files in your Desktop new_project folder and remove them:

  cd ~/Desktop/new_project
  rm -rf .git .railsrc
  # Now create the Rails app in this folder
  rails new .
  

• If that still fails, stick to using Documents for project creation and add a symlink to your desktop for easy access:

  ln -s ~/Documents/new_project ~/Desktop/new_project
  

3. Verify Your Ruby & Rails Environment #

You fixed the Ruby version issue with rvm, but let’s double-check to ensure stability:

• Confirm your active Ruby version matches what you installed:

  ruby -v
  

  You should see ruby 2.2.2p95 (or a close patch version)
• Confirm Rails is installed correctly:

  rails -v
  

• If you still hit snags, reinstall Rails with a version fully compatible with Ruby 2.2.2 (Rails 4.2.x is the best match):

  gem install rails -v 4.2.11.3
  

Bonus: Docker Setup Tip #

Once your Rails backend is set up, make sure your docker-compose.yml correctly maps services:

• Place a Dockerfile in your backend folder using Ruby 2.2.2 as the base image
• Configure your Vue frontend’s Dockerfile to communicate with the Rails backend via container networking

内容的提问来源于stack exchange，提问作者Jake