在 rails 中呈现 js.erb

Question

我想试试我的 js.erb 是否有效？

这里是我的观点posts/index触发

 <%= link_to "Like", {:controller => 'post', :id => post , :action =>'like'}, class: "btn btn-danger btn-xs", remote: true %>

我的post控制器

def like
@user = current_user
@post.liked_by(@user)
redirect_to posts_path
respond_to do |format|
  format.html {redirect_to posts_path}
  format.js { render :action => 'stablelike' }

end
end

这是我要测试的 js.erb

alert("working");

这是我的错误：当我检查我的 Chrome

AbstractController::DoubleRenderError 在 /post/like/85

Render and/or redirect were called multiple times in this action. Please note that you may only call render OR redirect, and at most once per action. Also note that neither redirect nor render terminate execution of the action, so if you want to exit an action after redirecting, you need to do something like "redirect_to(...) and return".

app/controllers/posts_controller.rb，第 83 行

 ``` ruby
 78       @user = current_user
 79       @post.liked_by(@user)
 80       redirect_to posts_path
 81       respond_to do |format|
 82         format.html {redirect_to posts_path}

83 format.js { render :action => 'stablelike' } 84
85 end 86 end 87

Answer 1

在控制器动作中，render 和 redirect_to 都不会停止动作的执行。这就是为什么您会得到 DoubleRenderError。删除第一个redirect_to，一切都应该没问题。

def like
  @user = current_user
  @post.liked_by(@user) # I am unsure what you're trying to accomplish here
  respond_to do |format|
    format.html { redirect_to posts_path }
    format.js { render :stablelike }
  end
end

如果这不起作用，可能是您没有设置 stablelike 操作来响应 xhr 请求。你可以通过

def stablelike
  respond_to  do |format|
    # other formats
    format.js # by default looks for `stablelike.js.erb`
  end
end

在 rails 中呈现 js.erb

Rendering js.erb in rails

javascript

ruby

ruby-on-rails

ruby-on-rails-3

AbstractController::DoubleRenderError 在 /post/like/85

app/controllers/posts_controller.rb，第 83 行