python - 使用 Scrapy DjangoItem 但它不会保存项目

Question

我正在学习 Python 和 Django，并且为了我的个人项目，我只是在玩 Scrapy 来抓取网站数据和链接。

设置DjangoItem和编写spider花了我将近两天的时间，但只有一件事我不能自己解决!

当我通过“scrapy crawl WebspiderSpider”运行蜘蛛时，它运行并结束时没有任何错误。但问题是抓取的数据没有保存...我检查了管道、项目、设置，但似乎没问题。

请帮帮我!

这是我的 webspider.py

from zukkan_bot.items import WebItem
import datetime
from scrapy.spiders import CrawlSpider, Rule
from scrapy.linkextractors import LinkExtractor


class WebspiderSpider(CrawlSpider):
name = 'WebspiderSpider'
allowed_domains = ['example.com']
start_urls = ['http://example.com/']

xpath = {
    'title': "//title/text()",
}

list_allow = [r'']
list_deny = [r'']
list_allow_parse = [r'']
list_deny_parse = [r'']

rules = (
    Rule(LinkExtractor(
        allow=list_allow,
        deny=list_deny,
    ),
    follow=True
    ),
    Rule(LinkExtractor(
        allow=list_allow_parse,
        deny=list_deny_parse,
        unique=True
    ),
    callback='parse_items'
    ),
)

def parse_items(self, response):
    item = WebItem()
    item['title'] = response.xpath(self.xpath['title']).extract()[0]
    item['link'] = response.url
    item['date'] = datetime.datetime.utcnow() + datetime.timedelta(hours=9)

    return WebItem(title=item['title'], link=item['link'], date=['date'])

这里是 items.py

from scrapy_djangoitem import DjangoItem
from zukkan.models import ExampleDotCom, Spider

class WebItem(DjangoItem):
django_model = Spider

这是 pipelines.py

class ZukkanBotPipeline(object):
def process_item(self, item, spider):
    item.save()
    return item

最后，这是我运行蜘蛛时的日志

scrapy crawl WebspiderSpider
/Users/XXXXXXX/PycharmProjects/begin/zukkan_bot/zukkan_bot/spiders/example.py:7: ScrapyDeprecationWarning: zukkan_bot.spiders.example.ExampleSpider inherits from deprecated class scrapy.spiders.BaseSpider, please inherit from scrapy.spiders.Spider. (warning only on first subclass, there may be others)
  class ExampleSpider(BaseSpider):
2017-08-09 11:17:57 [scrapy.utils.log] INFO: Scrapy 1.4.0 started (bot: zukkan_bot)
2017-08-09 11:17:57 [scrapy.utils.log] INFO: Overridden settings: {'BOT_NAME': 'zukkan_bot', 'NEWSPIDER_MODULE': 'zukkan_bot.spiders', 'ROBOTSTXT_OBEY': True, 'SPIDER_MODULES': ['zukkan_bot.spiders']}
2017-08-09 11:17:57 [scrapy.middleware] INFO: Enabled extensions:
['scrapy.extensions.corestats.CoreStats',
 'scrapy.extensions.telnet.TelnetConsole',
 'scrapy.extensions.memusage.MemoryUsage',
 'scrapy.extensions.logstats.LogStats']
2017-08-09 11:17:57 [scrapy.middleware] INFO: Enabled downloader middlewares:
['scrapy.downloadermiddlewares.robotstxt.RobotsTxtMiddleware',
 'scrapy.downloadermiddlewares.httpauth.HttpAuthMiddleware',
 'scrapy.downloadermiddlewares.downloadtimeout.DownloadTimeoutMiddleware',
 'scrapy.downloadermiddlewares.defaultheaders.DefaultHeadersMiddleware',
 'scrapy.downloadermiddlewares.useragent.UserAgentMiddleware',
 'scrapy.downloadermiddlewares.retry.RetryMiddleware',
 'scrapy.downloadermiddlewares.redirect.MetaRefreshMiddleware',
 'scrapy.downloadermiddlewares.httpcompression.HttpCompressionMiddleware',
 'scrapy.downloadermiddlewares.redirect.RedirectMiddleware',
 'scrapy.downloadermiddlewares.cookies.CookiesMiddleware',
 'scrapy.downloadermiddlewares.httpproxy.HttpProxyMiddleware',
 'scrapy.downloadermiddlewares.stats.DownloaderStats']
2017-08-09 11:17:57 [scrapy.middleware] INFO: Enabled spider middlewares:
['scrapy.spidermiddlewares.httperror.HttpErrorMiddleware',
 'scrapy.spidermiddlewares.offsite.OffsiteMiddleware',
 'scrapy.spidermiddlewares.referer.RefererMiddleware',
 'scrapy.spidermiddlewares.urllength.UrlLengthMiddleware',
 'scrapy.spidermiddlewares.depth.DepthMiddleware']
2017-08-09 11:17:57 [scrapy.middleware] INFO: Enabled item pipelines:
['zukkan_bot.pipelines.ZukkanBotPipeline']
2017-08-09 11:17:57 [scrapy.core.engine] INFO: Spider opened
2017-08-09 11:17:57 [scrapy.extensions.logstats] INFO: Crawled 0 pages (at 0 pages/min), scraped 0 items (at 0 items/min)
2017-08-09 11:17:57 [scrapy.extensions.telnet] DEBUG: Telnet console listening on 127.0.0.1:6023
2017-08-09 11:17:57 [scrapy.core.engine] DEBUG: Crawled (200) <GET http://sample.com/robots.txt> (referer: None)
2017-08-09 11:17:57 [scrapy.core.engine] DEBUG: Crawled (200) <GET http://sample.com/> (referer: None)
2017-08-09 11:17:57 [scrapy.core.engine] INFO: Closing spider (finished)
2017-08-09 11:17:57 [scrapy.statscollectors] INFO: Dumping Scrapy stats:
{'downloader/request_bytes': 436,
 'downloader/request_count': 2,
 'downloader/request_method_count/GET': 2,
 'downloader/response_bytes': 5321,
 'downloader/response_count': 2,
 'downloader/response_status_count/200': 2,
 'finish_reason': 'finished',
 'finish_time': datetime.datetime(2017, 8, 9, 11, 17, 57, 988661),
 'log_count/DEBUG': 3,
 'log_count/INFO': 7,
 'memusage/max': 55803904,
 'memusage/startup': 55803904,
 'response_received_count': 2,
 'scheduler/dequeued': 1,
 'scheduler/dequeued/memory': 1,
 'scheduler/enqueued': 1,
 'scheduler/enqueued/memory': 1,
 'start_time': datetime.datetime(2017, 8, 9, 11, 17, 57, 351302)}
2017-08-09 11:17:57 [scrapy.core.engine] INFO: Spider closed (finished)

Answer 1

我不确定您要做什么？但是当我删除第一条规则并删除允许和拒绝时，它工作得很好。

rules = (
    # Rule(LinkExtractor(
    #     # allow=list_allow,
    #     # deny=list_deny,
    # ),
    #     follow=True
    # ),
    Rule(LinkExtractor(
    #   allow=list_allow_parse,
    #   deny=list_deny_parse,
        unique=True
    ),
        callback='parse_items'
    ),
)

结果

2017-08-10 11:05:35 [scrapy.core.engine] DEBUG: Crawled (200) <GET http://sample.com/request-free-samples/> (referer: http://sample.com/)

{'title': 'Free Sample Products – Sample.com   » Product Test Marketing, Home User Test, Central Location Testing', 'link': 'http://sample.com/product-test-marketing/', 'date': datetime.datetime(2017, 8, 11, 0, 5, 35, 499285)}