Ruby on Rails:尝试创建一个将记录插入到表中的API。做不到

rails new MyApiProject
cd MyApiProject

rails generate model Post title:string body:text
rails db:migrate

rails generate controller Api::Posts

Rails.application.routes.draw do
  namespace :api do
    resources :posts, only: [:create]
  end
end

module Api
  class PostsController < ApplicationController
    skip_before_action :verify_authenticity_token

    def create
      @post = Post.new(post_params)

      if @post.save
        render json: @post, status: :created
      else
        render json: @post.errors, status: :unprocessable_entity
      end
    end

    private

    def post_params
      params.require(:post).permit(:title, :body)
    end
  end
end

curl -X POST http://localhost:3000/api/posts \
     -H "Content-Type: application/json" \
     -d '{
           "post": {
             "title": "My First Post",
             "body": "This is the body of my first post."
           }
         }'

{
  "post": {
    "title": "My First Post",
    "body": "This is the body of my first post."
  }
}