Renaming downloaded images in Scrapy 0.24 with content from an item field while avoiding filename conflicts?

The pipelines.py:

from scrapy.pipelines.images import ImagesPipeline
from scrapy.http import Request
from scrapy.exceptions import DropItem
from scrapy import log

class MyImagesPipeline(ImagesPipeline):

    #Name download version
    def file_path(self, request, response=None, info=None):
        image_guid = request.meta['model'][0]
        log.msg(image_guid, level=log.DEBUG)
        return 'full/%s' % (image_guid)

    #Name thumbnail version
    def thumb_path(self, request, thumb_id, response=None, info=None):
        image_guid = thumb_id + request.url.split('/')[-1]
        log.msg(image_guid, level=log.DEBUG)
        return 'thumbs/%s/%s.jpg' % (thumb_id, image_guid)

    def get_media_requests(self, item, info):
        yield Request(item['image_urls'][0], meta=item)

You're using the settings.py wrong. You should use this:

ITEM_PIPELINES = {'allenheath.pipelines.MyImagesPipeline': 1}

For thumbsnails to work, add this to settings.py:

IMAGES_THUMBS = {
    'small': (50, 50),
    'big': (100, 100),
}