scrapy在spider中通过pipeline获取数据库内容

# This is my Pipline
class MongoDBPipeline(object):
def __init__(self, mongodb_db=None, mongodb_collection=None):
self.connection = pymongo.Connection(settings['MONGODB_SERVER'], settings['MONGODB_PORT'])
....

def process_item(self, item, spider):
....
def get_date(self):
....

def open_spider(self, spider):
spider.myPipeline = self

class Spider(Spider):
name = "test"

def __init__(self):
self.myPipeline = None

def parse(self, response):
self.myPipeline.get_date()