我正在关注本教程:http://www.gotealeaf.com/blog/the-detailed-guide-on-how-ajax-works-with-ruby-on-rails
他正在使用_task partial来显示到目前为止创建的所有任务。我不明白的是为什么在这条线的部分工作原理:
<%= task.deadline %>
任务定义在哪里以及如何遍历所有任务?
_task.html.erb
<div class="row">
<div class="col-md-5 col-md-offset-1">
<h2>Tasks</h2>
</div>
<div class="col-md-2 col-md-offset-4">
<%= link_to new_task_path, remote: true do %>
<button class="btn btn-default">New</button>
<% end %>
</div>
</div>
<div class="row">
<div class="col-md-6 col-md-offset-2" id="task-form" style="display:none;"></div>
</div>
<div class="row">
<div class="col-md-7 col-md-offset-1" id="tasks"><%= render @tasks %></div>
</div>
控制器:
class TasksController < ApplicationController
before_action :all_tasks, only: [:index, :create, :update, :destroy]
before_action :set_tasks, only: [:edit, :update, :destroy]
respond_to :html, :js
def new
@task = Task.new
end
def create
@task = Task.create(task_params)
end
def update
@task.update_attributes(task_params)
end
def destroy
@task.destroy
end
private
def all_tasks
@tasks = Task.all
end
def set_tasks
@task = Task.find(params[:id])
end
def task_params
params.require(:task).permit(:description, :deadline)
end
end
索引视图:
<div class="row">
<div class="col-md-5 col-md-offset-1">
<h2>Tasks</h2>
</div>
<div class="col-md-2 col-md-offset-4">
<%= link_to new_task_path, remote: true do %>
<button class="btn btn-default">New</button>
<% end %>
</div>
</div>
<div class="row">
<div class="col-md-6 col-md-offset-2" id="task-form" style="display:none;"></div>
</div>
<div class="row">
<div class="col-md-7 col-md-offset-1" id="tasks"><%= render @tasks %></div>
</div>
答案 0 :(得分:2)
<%= render @tasks %>
是:
<% @tasks.each do |task| %>
# task object is available here so you can call task.deadline on it
<% end %>
http://guides.rubyonrails.org/layouts_and_rendering.html#using-partials寻找 3.4.5渲染集合