[英]Undefined method - NOMethod error with Resque gem
I am trying to generate xml file as a background task using resque gem here is the class which generates xml file .... 我试图使用resque gem生成xml文件作为后台任务这里是生成xml文件的类....
ENV['RAILS_ENV'] = ARGV.first || ENV['RAILS_ENV']
require File.expand_path(File.dirname(__FILE__) + "/../../config/environment")
require 'rubygems'
require 'builder'
class GenerateXml
@queue = :worker
def self.perform
file_name = "#{Time.now.strftime('%Y_%m_%d')}_export.xml"
xml = Builder::XmlMarkup.new(:target => file_name, :indent => 2)
xml.instruct!(:xml, :encoding => "UTF-8")
xml.Postings do
Result.find_in_batches do |result|
xml.Posting do
xml.JobID result.job_id
xml.JobURL result.job_url
end
end
end
end
end
and my result model from where I am extracting the fields for the xml tags is like this 我从中提取xml标签字段的结果模型是这样的
require 'active_record'
class Result < ActiveRecord::Base
def job_id
self.link
end
def job_url
self.link
end
end
My question is why result.job_url and result.job_id from class GenerateXml
is not able to map to Result
class correctly? 我的问题是为什么来自GenerateXml
类的result.job_url和result.job_id无法正确映射到Result
类?
and one more thing the Result
class is under app/models directory where as GenerateXml
class is under lib/jobs directory 还有一件事, Result
类在app / models目录下,而GenerateXml
类在lib / jobs目录下
Here is the trace of error. 这是错误的痕迹。
undefined method `job_id' for #<Array:0xb3f26738>
/home/netserv/RubymineProjects/crawler/lib/jobs/generate_xml.rb:22:in `perform'
/home/netserv/.rvm/gems/ruby-1.8.7-p357/gems/builder-3.0.0/lib/builder/xmlbase.rb:155:in `call'
/home/netserv/.rvm/gems/ruby-1.8.7-p357/gems/builder-3.0.0/lib/builder/xmlbase.rb:155:in `_nested_structures'
/home/netserv/.rvm/gems/ruby-1.8.7-p357/gems/builder-3.0.0/lib/builder/xmlbase.rb:63:in `method_missing'
/home/netserv/RubymineProjects/crawler/lib/jobs/generate_xml.rb:21:in `perform'
/home/netserv/.rvm/gems/ruby-1.8.7-p357/gems/activerecord-3.2.3/lib/active_record/relation/batches.rb:72:in `find_in_batches'
/home/netserv/.rvm/gems/ruby-1.8.7-p357/gems/activerecord-3.2.3/lib/active_record/querying.rb:8:in `__send__'
/home/netserv/.rvm/gems/ruby-1.8.7-p357/gems/activerecord-3.2.3/lib/active_record/querying.rb:8:in `find_in_batches'
/home/netserv/RubymineProjects/crawler/lib/jobs/generate_xml.rb:20:in `perform'
/home/netserv/.rvm/gems/ruby-1.8.7-p357/gems/builder-3.0.0/lib/builder/xmlbase.rb:155:in `call'
/home/netserv/.rvm/gems/ruby-1.8.7-p357/gems/builder-3.0.0/lib/builder/xmlbase.rb:155:in `_nested_structures'
/home/netserv/.rvm/gems/ruby-1.8.7-p357/gems/builder-3.0.0/lib/builder/xmlbase.rb:63:in `method_missing'
/home/netserv/RubymineProjects/crawler/lib/jobs/generate_xml.rb:19:in `perform'
find_in_batches
returns arrays . find_in_batches
返回数组 。 Inside the Postings
block, you could do this: 在Postings
块中,你可以这样做:
Result.find_in_batches do |results|
results.each do
xml.Posting do
xml.JobID result.job_id
xml.JobURL result.job_url
end
end
end
But why even bother with find_in_batches
? 但为什么甚至打扰find_in_batches
?
find_in_batches
is returning an Array . find_in_batches
返回一个数组 。
You have to update or create a specific Result
and not update an Array
of Results
, what ever that meant. 您必须更新或创建特定Result
而不是更新Results
Array
,这意味着什么。
声明:本站的技术帖子网页,遵循CC BY-SA 4.0协议,如果您需要转载,请注明本站网址或者原文地址。任何问题请咨询:yoyou2525@163.com.