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ramsayleung avatar ramsayleung commented on May 30, 2024

因为爬虫的去重是scrapy-redis实现的，我并没有重写去重规则，而scrapy-redis 是根据 Request的fingerprint来作去重的判断依据的，所以可能相同的商品(即相同的url)，但是Request对象不相同，就没有去掉．所以可能会出现重复的商品

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ramsayleung avatar ramsayleung commented on May 30, 2024

其实最最开始的时候，也是有验证重复商品的，只是我是通过Mongodb 的唯一索引来去重的．插入是遇到重复的商品就抛出异常，然后把异常吃掉．这种去重方式很不优雅，现在我已经重写了商品的去重逻辑，通过Redis 保存商品的sku-id, 插入Mongodb 前验证一下Redis 是否已经有这个商品的sku-id, 有则不插入，反之亦然.

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