Scrapy mongodb Joint Group Keys in python to remove duplicate file_url and name Joint Primary Keys

 def process_item(self, item, spider):
        print("")

        print(item["file_url"], item["name"])

        key_word = {"file_url": item["file_url"], "name": item["name"]}
        res = self.db.find(key_word)
        if res:
            print("")

            raise DropItem("Duplicate item found: %s" % item)
        else:
            print("*******************************************************************************")
            self.db.insert({"file_url": item["file_url"], "name": item["name"]})

            return item

this is found in the database. The judgment of the joint group key above me seems to be wrong, because there is no url and name in the program at all. Dropitme asks for advice

db.XiaoMiQuan.find ()
{"_ id": ObjectId ("5bbf14dbc96b5b3f5627d11d"), "file_url": "https://baogaocos.seedsufe.com/2018/07/19/doc_1532004923556.pdf"," name ":" AMCHAM- China"s "Belt and Road Initiative": impact on American Enterprises (English)-2018.6-8 pages .pdf "}
Aug.12,2021
MySQL Query : SELECT * FROM `codeshelper`.`v9_news` WHERE status=99 AND catid='6' ORDER BY rand() LIMIT 5
MySQL Error : Disk full (/tmp/#sql-temptable-64f5-1e498ea-44d58.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
MySQL Errno : 1021
Message : Disk full (/tmp/#sql-temptable-64f5-1e498ea-44d58.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
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