Question

我有这个哈希。我试图在视图中呈现。我对Rails这么新，我没有丝毫的线索如何做到这一点。我需要做的就是能够通过service_name或者按照主机和构建块对事物进行排序。我已经尝试了十几种东西，但我似乎无法正常使用，所以我现在需要任何帮助。

我想要做的一个例子：

example

下面是哈希。到目前为止，我得到的最好的服务名称是独立列出的，无需排序或其他任何内容。

services_hash = {
    :status => "successful",
    :service_list => [
        {
            :service_name => "oozie",
            :status => "RUNNING",
            :status_message => "Running Master Service",
            :host => "1"
        },
        {
            :service_name => "single-namenode",
            :status => "RUNNING",
            :status_message => "Running Service",
            :host => "1"
        },
        {
            :service_name => "single-database",
            :status => "RUNNING",
            :status_message => "Running Service",
            :host => "1"
        },
        {
            :service_name => "datanode",
            :status => "RUNNING",
            :status_message => "Running Service",
            :host => "1"
        },
        {
            :service_name => "secondarynamenode",
            :status => "RUNNING",
            :status_message => "Running Service",
            :host => "1"
        },
        {
            :service_name => "web",
            :status => "DEAD",
            :status_message => "Running Master Service",
            :host => "1"
        },
        {
            :service_name => "tasktracker",
            :status => "RUNNING",
            :status_message => "Running Service",
            :host => "1"
        },
        {
            :service_name => "jobtracker",
            :status => "RUNNING",
            :status_message => "Running Master Service",
            :host => "1"
        },
        {
            :service_name => "oozie",
            :status => "RUNNING",
            :status_message => "Running Master Service",
            :host => "1"
        },
        {
            :service_name => "single-namenode",
            :status => "RUNNING",
            :status_message => "Running Service",
            :host => "1"
        },
        {
            :service_name => "single-database",
            :status => "RUNNING",
            :status_message => "Running Service",
            :host => "1"
        },
        {
            :service_name => "datanode",
            :status => "RUNNING",
            :status_message => "Running Service",
            :host => "1"
        },
        {
            :service_name => "secondarynamenode",
            :status => "RUNNING",
            :status_message => "Running Service",
            :host => "1"
        },
        {
            :service_name => "web",
            :status => "DEAD",
            :status_message => "Running Master Service",
            :host => "1"
        },
        {
            :service_name => "tasktracker",
            :status => "RUNNING",
            :status_message => "Running Service",
            :host => "1"
        },
        {
            :service_name => "jobtracker",
            :status => "RUNNING",
            :status_message => "Running Master Service",
            :host => "1"
        },
        {
            :service_name => "oozie",
            :status => "RUNNING",
            :status_message => "Running Master Service",
            :host => "1"
        },
        {
            :service_name => "single-namenode",
            :status => "RUNNING",
            :status_message => "Running Service",
            :host => "1"
        },
        {
            :service_name => "single-database",
            :status => "RUNNING",
            :status_message => "Running Service",
            :host => "1"
        },
        {
            :service_name => "datanode",
            :status => "RUNNING",
            :status_message => "Running Service",
            :host => "1"
        },
        {
            :service_name => "secondarynamenode",
            :status => "RUNNING",
            :status_message => "Running Service",
            :host => "1"
        },
        {
            :service_name => "web",
            :status => "DEAD",
            :status_message => "Running Master Service",
            :host => "1"
        },
        {
            :service_name => "tasktracker",
            :status => "RUNNING",
            :status_message => "Running Service",
            :host => "1"
        },
        {
            :service_name => "jobtracker",
            :status => "RUNNING",
            :status_message => "Running Master Service",
            :host => "1"
        },
        {
            :service_name => "oozie",
            :status => "RUNNING",
            :status_message => "Running Master Service",
            :host => "1"
        },
        {
            :service_name => "single-namenode",
            :status => "RUNNING",
            :status_message => "Running Service",
            :host => "1"
        },
        {
            :service_name => "single-database",
            :status => "RUNNING",
            :status_message => "Running Service",
            :host => "1"
        },
        {
            :service_name => "datanode",
            :status => "RUNNING",
            :status_message => "Running Service",
            :host => "1"
        },
        {
            :service_name => "secondarynamenode",
            :status => "RUNNING",
            :status_message => "Running Service",
            :host => "1"
        },
        {
            :service_name => "web",
            :status => "DEAD",
            :status_message => "Running Master Service",
            :host => "1"
        },
        {
            :service_name => "tasktracker",
            :status => "RUNNING",
            :status_message => "Running Service",
            :host => "1"
        },
        {
            :service_name => "jobtracker",
            :status => "RUNNING",
            :status_message => "Running Master Service",
            :host => "1"
        },
        {
            :service_name => "oozie",
            :status => "RUNNING",
            :status_message => "Running Master Service",
            :host => "1"
        },
        {
            :service_name => "single-namenode",
            :status => "RUNNING",
            :status_message => "Running Service",
            :host => "1"
        },
        {
            :service_name => "single-database",
            :status => "RUNNING",
            :status_message => "Running Service",
            :host => "1"
        },
        {
            :service_name => "datanode",
            :status => "RUNNING",
            :status_message => "Running Service",
            :host => "1"
        },
        {
            :service_name => "secondarynamenode",
            :status => "RUNNING",
            :status_message => "Running Service",
            :host => "1"
        },
        {
            :service_name => "web",
            :status => "DEAD",
            :status_message => "Running Master Service",
            :host => "1"
        },
        {
            :service_name => "tasktracker",
            :status => "RUNNING",
            :status_message => "Running Service",
            :host => "1"
        },
        {
            :service_name => "jobtracker",
            :status => "RUNNING",
            :status_message => "Running Master Service",
            :host => "1"
        },
        {
            :service_name => "oozie",
            :status => "RUNNING",
            :status_message => "Running Master Service",
            :host => "1"
        },
        {
            :service_name => "single-namenode",
            :status => "RUNNING",
            :status_message => "Running Service",
            :host => "1"
        },
        {
            :service_name => "single-database",
            :status => "RUNNING",
            :status_message => "Running Service",
            :host => "1"
        },
        {
            :service_name => "datanode",
            :status => "RUNNING",
            :status_message => "Running Service",
            :host => "1"
        },
        {
            :service_name => "secondarynamenode",
            :status => "RUNNING",
            :status_message => "Running Service",
            :host => "1"
        },
        {
            :service_name => "web",
            :status => "DEAD",
            :status_message => "Running Master Service",
            :host => "1"
        },
        {
            :service_name => "tasktracker",
            :status => "RUNNING",
            :status_message => "Running Service",
            :host => "1"
        },
        {
            :service_name => "jobtracker",
            :status => "RUNNING",
            :status_message => "Running Master Service",
            :host => "1"
        },
        {
            :service_name => "oozie",
            :status => "RUNNING",
            :status_message => "Running Master Service",
            :host => "1"
        },
        {
            :service_name => "single-namenode",
            :status => "RUNNING",
            :status_message => "Running Service",
            :host => "1"
        },
        {
            :service_name => "single-database",
            :status => "RUNNING",
            :status_message => "Running Service",
            :host => "1"
        },
        {
            :service_name => "datanode",
            :status => "RUNNING",
            :status_message => "Running Service",
            :host => "1"
        },
        {
            :service_name => "secondarynamenode",
            :status => "RUNNING",
            :status_message => "Running Service",
            :host => "1"
        },
        {
            :service_name => "web",
            :status => "DEAD",
            :status_message => "Running Master Service",
            :host => "1"
        },
        {
            :service_name => "tasktracker",
            :status => "RUNNING",
            :status_message => "Running Service",
            :host => "1"
        },
        {
            :service_name => "jobtracker",
            :status => "RUNNING",
            :status_message => "Running Master Service",
            :host => "1"
        }
    ]
}

修改以下是我尝试过的两件事，其他人帮助我得出了排序的结论。两者都有所作为。但是当我把这些想法结合起来时，我失败了。我已经废弃了我的组合工作，希望找到一个答案如何做到这一点，所以我可以迭代哈希重现上面的图像到某种效果。

注意目前我意识到HTML的输出不会完全类似于图像。现在我被它的if-else部分困住了，因为我正在尝试它的方式似乎跳过了它。

<%
val = @service_hash
svcs = val[:service_list]
puts "#{svcs.size} service entries."

grouped = svcs.group_by { |svc| svc[:service_name] }
puts "#{grouped.size} named services:"

grouped.keys.sort.each do |name|
    puts "  service: #{name}"
    grouped[name].each do |svc|
        puts "     host: #{svc[:host]}"
        puts "   status: #{svc[:status]}"
        puts "           #{svc[:status_message]}"
    end
    puts '-'*40
end
%>

Answer 1

在Ruby on Rails中puts不写入输出缓冲区。在ERB中，<%= %>内的代码块的返回值将写入输出。因此，在您看来，您的代码看起来应该更像这样：

# ERB View Template
<%
  val = @service_hash
  svcs = val[:service_list] # This should probably be done in a controller rather than a view.
%>

<%= svcs.size %> service entries.

<%
  grouped = svcs.group_by { |svc| svc[:service_name] } # Again, this should probably be in a controller
%>

<%= grouped.size %> named services:

<% grouped.keys.sort.each do |name| %>
  service: <%= name %>
  <% grouped[name].each do |svc| %>
    host: <%= svc[:host] %>
    status: <% svc[:status] %>
    <%= svc[:status_message] %>
  <% end %>
  <%= '-'*40 %>

<% end %>

Rails问题迭代View的哈希

1 个答案: