将foreign_key值传递给Rails控制器的更好方法

class User< ApplicationRecord
  has_many :posts
end

class Post< ApplicationRecord
  belongs_to :user
end

class PostsController< ApplicationController
  def create
    @post = Post.new(post_params)
    if @post.save
      redirect_to @post
    else
      render 'new'
    end
  end

  private

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

<%= form_with(model: [ @user, @post ]) do |form| %>
  <div>
    <%= form.label :title %>
    <%= form.text_field :title %>
  </div>
  <div>
    <%= form.label :content %>
    <%= form.text_area :content %>
  </div>
  <%= form.hidden_field :user_id, value: @user.id %>
  <%= form.submit %>
<% end %>