我使用以下过滤器来检查字段是否为空。
filter {
ruby{
code => '
userPref = {}
user = {}
group = {}
groups = []
if event.get("stripecustomerid") == "null" {
group["groupName"] = event.get("groupname");
group["role"] = event.get("type");
groups << group;
}
'
}
}
但是在运行时，我收到以下错误，
SyntaxError: (ruby filter code):8: syntax error, unexpected tLCURLY
if event.get("groupname") == "null" {
^
eval at org/jruby/RubyKernel.java:1079
register at /Users/Dummy/software/es/logstash-5.2.2/vendor/bundle/jruby/1.9/gems/logstash-filter-ruby-3.0.2/lib/logstash/filters/ruby.rb:38
register at /Users/Dummy/software/es/logstash-5.2.2/vendor/jruby/lib/ruby/1.9/forwardable.rb:201
register_plugin at /Users/Dummy/software/es/logstash-5.2.2/logstash-core/lib/logstash/pipeline.rb:282
register_plugins at /Users/Dummy/software/es/logstash-5.2.2/logstash-core/lib/logstash/pipeline.rb:293
each at org/jruby/RubyArray.java:1613
register_plugins at /Users/Dummy/software/es/logstash-5.2.2/logstash-core/lib/logstash/pipeline.rb:293
start_workers at /Users/Dummy/software/es/logstash-5.2.2/logstash-core/lib/logstash/pipeline.rb:303
run at /Users/Dummy/software/es/logstash-5.2.2/logstash-core/lib/logstash/pipeline.rb:232
start_pipeline at /Users/Dummy/software/es/logstash-5.2.2/logstash-core/lib/logstash/agent.rb:387
事件流看起来像这样，我想过滤掉＆＃34; null＆＃34;字段。
{"sqlId":1744,"minAllowance":{"hasSub":false,"subExpiry":0,"freeSec":1800,"freeSecExpiry":0},"groups":[{"groupName":null,"role":0}],"stripecustomerid":null
关于什么可能出错的任何想法？