How do I save scraped items to multiple .jl files?

I can’t seem to find this in the docs, so here goes…

I want to run a scraper that saves different types of items to separate JSON Lines files.

My settings.py has this:

ITEM_PIPELINES = {
   'permits.pipelines.PermitTypePipeline': 300,
   'permits.pipelines.PermitNumberPipeline': 301,
}

My pipelines.py has this:

class PermitTypePipeline(object):
	def process_item(self, item, spider):
		return item

class PermitNumberPipeline(object):
	def process_item(self, item, spider):
		return item

items.py has this:

class PermitType(scrapy.Item):
	permitWebCode=	scrapy.Field()

class PermitNumber(scrapy.Item):
	permitNumber=	scrapy.Field()

my_spider.py has this:

def parse(self,response):
  ## Some scraper code here ... 
  yield PermitType(permitWebCode=someScrapedVariable)
  yield PermitNumber(permitNumber=anotherScrapedVariable)

How do I save the yielded PermitType object to permit_types.jl and the PermitNumber object to permit_number.jl?

[VMRuiz]

I solved this by using an custom feed exporter

It could be improved because you still need to manualy define the list of item that you want to export but it will work much better than creating a pipeline, because you will be able to use it with any of the already implemented exporters like csv, json, jl…

Also, with this solution you need to include %(item)s in the FEED_URI so it generates a different file name based on each item name.

[Gallaecio]

I believe FEEDS and https://github.com/scrapy/scrapy/pull/5178 addressed this.