如何讓控制器中的用戶信息在rails中

Question

我需要在帖子表中存儲user_id（對於每個新帖子）。我從表單中將user_id作爲hidden_​​field傳遞。從控制器本身獲取user_id的替代方法是什麼？

在控制器

def create 
    @post =@topic.posts.new(post_params).save 
end 

樁模型

class Post < ApplicationRecord 
    belongs_to :topic, counter_cache: true 
    belongs_to :user 
    has_and_belongs_to_many :users # to maintain read and unread status for the posts 
    has_many :comments , dependent: :destroy 
    has_many :ratings , dependent: :destroy 
    has_and_belongs_to_many :tags 
    end 

形式

<%= form_for [@topic, @post],remote: true,html: { multipart: true} do |form| %> 

    <div class="field"> 
     <%= form.label :author %> 
     <%= form.text_field :author, :value => current_user.email %> 
    </div> 

     <%= form.label :content %> 
     <%= form.text_area :content, id: :post_content, autofocus: true %> 

    <!--<%= form.hidden_field :user_id %>--> 

<div class="field"> 
    <%=form.label :image%><br> 
    <%=form.file_field :image %> 
</div> 

    <%= form.fields_for :tags do |a|%> 
    <div class="field"> 

     <%= a.label :tag_name %> 
     <%= a.text_area :tag_name %> 
    </div> 
    <% end %> 
    <div class="field"> 
     <%= form.label "select tag" %> 
     <%= form.collection_select(:tag_ids, Tag.all, :id, :tag_name, {}, {:multiple => true, :size => 10, :prompt_text => "select tag"}) %> 
    </div> 


    <div class="submit"> 
     <%= form.submit %> 
    </div> 
<% end %> 

Answer 1

您可以使用current_user的控制器，如下面，

def create 
    @topic.posts.new(post_params).save 
end 

private 

def post_params 
    params.require(:post).permit(...).merge(user: current_user) 
end 

或

def create 
    @topic.posts.new(post_params.merge(user: current_user)).save 
end