A mistake in parameter deliver through two method!

[kevin-ZZZ]

Hey,madisonb: I found a problem in parameter delivering! I instantiate an item object in method A,and then deliver it through meta.but I got a list object in method B,not the same item object !

def parse(self,response):
    item = item_object()
    item["xx"] = "xxx"
    yield scrapy.Request(url, meta={"item": item}, callback=self.parse_images)

def parse_image(self,response):
    item = response.meta["item"]

The type of item will be list,not a item object!

However ,when I used a dict object as parameter to deliver through different method,I could get the same dict like this:

def parse(self,response):
    item = item_object()
    item["xx"] = "xxx"
    yield scrapy.Request(url, meta={"item": dict(item)}, callback=self.parse_images)

def parse_image(self,response):
    item = dict(response.meta["item"][0])

And I can get a dict object! Is this a bug or just a mistake? Thanks for help!

[madisonb]

What branch are you on? Can you replicate this behavior in the dev branch too? We changed how the request serialization works and now use the internal Scrapy serializer, so I would be curious if you can replicate it there.

[kevin-ZZZ]

@madisonb I was on dev branch,I used python3.6, but the code was cloned half year ago,So I'm curious when you solve the problem ,All I need do is just need update the code? And it will be nice to show me the git version about this problem?

[madisonb]

Did you ever figure this out? Otherwise I am going to close the issue due to inactivity

[madisonb]

Closing.