scrapy和mysql

我试图让scrapy将已爬网的数据插入mysql，我的代码爬网良好，并在缓冲区中收集数据，没有错误，但数据库从未更新。 “没有运气”，“没有错误”

pipeline.py

from twisted.enterprise import adbapi
import datetime
import MySQLdb.cursors

class SQLStorePipeline(object):

    def __init__(self):
        self.dbpool = adbapi.ConnectionPool('MySQLdb', db='craigs',
                user='bra', passwd='boobs', cursorclass=MySQLdb.cursors.DictCursor,
                charset='utf8', use_unicode=True)

    def process_item(self, items, spider):
        # run db query in thread pool
        query = self.dbpool.runInteraction(self._conditional_insert, items)
        query.addErrback(self.handle_error)

        return items

    def _conditional_insert(self, tx, items):
        # create record if doesn't exist.
        # all this block run on it's own thread
        tx.execute("select * from scraped where link = %s", (items['link'][0], ))
        result = tx.fetchone()
        if result:
            log.msg("Item already stored in db: %s" % items, level=log.DEBUG)
        else:
            tx.execute(\
                "insert into scraped (posting_id, email, location, text, title) "
                "values (%s, %s, %s, %s, %s)",
                (items['posting_id'][0],
                items['email'][1],
                items['location'][2],
                items['text'][3],
                items['title'][4],
                )

            )
            log.msg("Item stored in db: %s" % items, level=log.DEBUG)

    def handle_error(self, e):
        log.err(e)

爬网代码

from scrapy.contrib.spiders import CrawlSpider, Rule
from scrapy.contrib.linkextractors.sgml import SgmlLinkExtractor
from scrapy.selector import HtmlXPathSelector
from craigs.items import CraigsItem

class MySpider(CrawlSpider):
    name = "craigs"
    f = open("urls.txt")
    start_urls = [url.strip() for url in f.readlines()]
    f.close()
    rules = [Rule(SgmlLinkExtractor(restrict_xpaths=('/html/body/blockquote[3]/p/a',)), follow=True, callback='parse_profile')]

    def parse_profile(self, response):
        items = []
        img = CraigsItem()
        hxs = HtmlXPathSelector(response)
        img['title'] = hxs.select('//h2[contains(@class, "postingtitle")]/text()').extract()
        img['posting_id'] = hxs.select('//html/body/article/section/section[2]/div/p/text()').extract()
        items.append(img)
        return items[0]
        return img[0]

设置.py

BOT_NAME = 'craigs' 
BOT_VERSION = '1.0' 
SPIDER_MODULES = ['craigs.spiders'] 
NEWSPIDER_MODULE = 'craigs.spiders' 
USER_AGENT = '%s/%s' % (BOT_NAME, BOT_VERSION)

---

管道代码根本没有被调用的原因是它还没有被激活。此激活通过在settings.py中添加一个新节来完成，如所示。e、 g

---

此外，您的

parse_profile

函数应该只返回

img

。如果单个响应页面将导致多个项目，则只需添加要返回的项目列表。

在设置中激活管道，并使用收益率而不是返回。

您应该

提交当前事务，从而使更改永久化

那以后呢

tx.execute(\
            "insert into scraped (posting_id, email, location, text, title) "
            "values (%s, %s, %s, %s, %s)",
            (items['posting_id'][0],
            items['email'][1],
            items['location'][2],
            items['text'][3],
            items['title'][4],
            )

        )

你必须

db.commit()

db
这里是

db = MySQLdb.connect(host="localhost",user = "root", passwd = "1234", db="database_name")

请试一试。
试着在
进程项目
和
\u条件插入
函数中放入一条打印语句，看看它们是否被调用。另外，您的settings.py文件是什么样子的？settings.pyBOT_NAME='craigs'BOT_VERSION='1.0'SPIDER_MODULES=['craigs.SPIDER']NEWSPIDER_MODULE='craigs.SPIDER'USER_AGENT='%s/%s'（BOT_NAME，BOT_VERSION）pipelines.py中的misc print语句从不反映正在执行的代码。此答案是否有助于解决此问题？根据Akhter Wahab建议的编辑，编辑了答案。干杯，伙计！
db = MySQLdb.connect(host="localhost",user = "root", passwd = "1234", db="database_name")