get_project_settings precludes configuring settings on command line

[eshao]

The way you're currently getting settings:

from scrapy.utils.project import get_project_settings

Only allows reading settings from the settings.py file. If a user wants to overwrite MONGODB_DATABASE, for example, from the command line using the -s flag, it won't register in scrapy-mongodb.

The solution would be to do something like:

class MyExtension(object):

    @classmethod
    def from_crawler(cls, crawler):
        settings = crawler.settings
        if settings['LOG_ENABLED']:
            print "log is enabled!"

Source: http://doc.scrapy.org/en/latest/topics/settings.html

[sebdah]

Thanks for the report @eshao! I have adjusted this and released version 0.6.2 to PyPI.