[英]How to select data from multiple model in rails
我有三個模型 project_manager、project_director 和 human_resource,每個模型都有一個狀態布爾字段,如果這三個模型的布爾值為真,我如何在 rails 中打印一些東西。 目前我正在通過這樣做訪問模型中的數據-
<% if project_site.project_managers.empty? %>
<td class="pending fi-eye"><%= " Pending" %></td>
<% else %>
<% project_site.project_managers.each do |project_manager| %>
<% if project_manager.status == false %>
<td class="rejected fi-x"><%= ' Rejected' %></td>
<% elsif project_manager.status == true %>
<td class="approved fi-check"><%= " Approved" %></td>
<% end %>
<% end %>
<% end %>
<% if project_site.project_directors.empty? %>
<td class="pending fi-eye"><%= " Pending" %></td>
<% else %>
<% project_site.project_directors.each do |project_director| %>
<% if project_director.status == false %>
<td class="rejected fi-x"><%= ' Rejected' %></td>
<% elsif project_director.status == true %>
<td class="approved fi-check"><%= " Approved" %></td>
<% end %>
<% end %>
<% end %>
<% if project_site.human_resources.empty? %>
<td class="pending fi-eye"><%= " Pending" %></td>
<% else %>
<% project_site.human_resources.each do |human_resource| %>
<% if human_resource.status == false %>
<td class="rejected fi-x"><%= ' Rejected' %></td>
<% elsif human_resource.status == true %>
<td class="approved fi-check"><%= " Approved" %></td>
<% end %>
<% end %>
<% end %>
如果這三個模型狀態值都為真,我想打印已批准我怎么能在 Rails 中做到這一點?
創建一個輔助方法並輸入以下代碼:
def check_resource_status(project_site, resources)
statuses = project_site.send(resources.to_sym).pluck(:status)
statuses.all? ? true : false
end
def status_container(status)
content_tag :div, class: ['sample'] do
status_label = status ? 'Approved' : 'Rejected'
default_class = status ? 'fi-check' : 'fi-x'
status_class = [default_class, status_label.downcase]
concat content_tag(:label, status_label, class: status_class)
end
end
從您的視圖文件:
status_container(check_resource_status(project_site, 'human_resources'))
status_container(check_resource_status(project_site, 'project_directors'))
status_container(check_resource_status(project_site, 'project_managers'))
如果我正確理解了你的問題,你所需要的就是這樣的:
<% if human_resource.status? %>
<td class="approved fi-check"><%= ' Approved' %></td>
<% else %>
<td class="rejected fi-x"><%= ' Rejected' %></td>
<% end %>
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