所以这可能有点令人困惑,但请耐心等待.简而言之,我希望使用某个键值循环所有属性,然后在值不为空时将它们插入模板中.这是我的代码:
属性:
# === Default file Configurations # default['elasticsearch']['default']['ES_USER'] = '' default['elasticsearch']['default']['ES_GROUP'] = '' default['elasticsearch']['default']['ES_HEAP_SIZE'] = '' default['elasticsearch']['default']['MAX_OPEN_FILES'] = '' default['elasticsearch']['default']['MAX_LOCKED_MEMORY'] = 'unlimited' default['elasticsearch']['default']['MAX_MAP_COUNT'] = '' default['elasticsearch']['default']['LOG_DIR'] = '/var/log/elasticsearch' default['elasticsearch']['default']['data_dir'] = '/var/lib/elasticsearch' default['elasticsearch']['default']['WORK_DIR'] = '/tmp/elasticsearch' default['elasticsearch']['default']['CONF_DIR'] = '/etc/elasticsearch' default['elasticsearch']['default']['CONF_FILE'] = '/etc/elasticsearch/elasticsearch.yml' default['elasticsearch']['default']['RESTART_ON_UPGRADE'] = ''
模板:
<% node['elasticsearch']['default'].each do |host| -%> <% if node.elasticsearch.default.host not nil -%> <%= host %>=<%= node.elasticsearch.default.host %> <% end %>
输出(希望):
MAX_LOCKED_MEMORY=unlimited LOG_DIR=/var/log/elasticsearch data_dir=/var/lib/elasticsearch WORK_DIR=/tmp/elasticsearch CONF_DIR=/etc/elasticsearch CONF_FILE=/etc/elasticsearch/elasticsearch.yml
我的ruby不是最好的,因为我刚刚开始使用所有这些东西,但我找不到这种情况的任何例子.任何帮助都会很棒,谢谢.
解决方法
你的意思是:
<% node['elasticsearch']['default'].each do |key,value| -%> <% unless value.empty? -%> <%= key %>=<%= value %> <% end %> <% end %>
在迭代Hash时,您将检查其键值对.所以对于第一次迭代,key将是’ES_USER’,value将是”(这不是nil ……).
接下来,检查该值是否为blank?
,并打印出key = value行.