scrapy采集入库，下面的是入的sqlite3 的代码，改成入库mysql的，下面代码需要改动吗？

Z时代
2024-01-10
分类：IT

下面是网上的一个入库sqlite3的，我要原样改成入库mysql的。
功能就是插入文章，在插入文章前需要得到文章分类的id,如果有就根据分类名查询到分类id, 如果没有就根据得到的资料生成分类并取得id.
下面sqlite3的是可以的

问题是我要改成mysql 的就不行了。具体看后面代码。

class BookspiderPipeline(object):
    def __init__(self):
        DBpath = os.getcwd() + '/db.sqlite3'
        self.con = sqlite3.connect(DBpath)
        self.cur = self.con.cursor()
    def process_item(self, item, spider):
        self.cur.execute("SELECT id FROM books_tag WHERE tagname = ?", (item['categoryName'],))
        tagID = self.cur.fetchone()
        if not tagID:
            self.cur.execute("INSERT INTO books_tag (tagname) VALUES (?)", (item['categoryName'],))
            self.con.commit()
            self.cur.execute("SELECT id FROM books_tag WHERE tagname = ?", (item['categoryName'],))
            tagID = self.cur.fetchone()
        tagID = tagID[0]
        print(tagID)
        self.cur.execute("SELECT id FROM books_book WHERE title = ?", (item['bookName'],))
        bookID = self.cur.fetchone()
        if not bookID:
            self.cur.execute('''
            INSERT INTO books_book (title, cover, author, intro, tag_id) VALUES (?,?,?,?,?)
            ''', (item['bookName'], item['cover'], item['author'], item['intro'], tagID))
            self.con.commit()
            self.cur.execute("SELECT id FROM books_book WHERE title = ?", (item['bookName'],))
            bookID = self.cur.fetchone()
        bookID = bookID[0]
        print(bookID)
        self.cur.execute('''INSERT INTO books_chapter (number, title, content, book_id) 
                        VALUES (?,?,?,?)''', (int(item['number']), item['chapterName'], item['chapterContent'], bookID))
        self.con.commit()        return item

我的代码：

class ScMySqlPipeline(object):
    def __init__(self):
        dbargs = dict(
            host = '127.0.0.1',
            user = 'root',
            passwd = 'mysqlpasswd',
            db = 'info2222',
            port = 3306,
            cp_reconnect = True,
            cursorclass = pymysql.cursors.DictCursor,
            charset = 'utf8mb4',  
            use_unicode = True,
        )
        self.dbpool = adbapi.ConnectionPool('pymysql', **dbargs)
    def process_item(self, item, spider):
        #代码执行到这里就出问题了。应该下面代码不对。
        #下面是 先判断有没有这个分类，根据分类名查询数据库，如果有就把这个分类的id取出来赋值给category_id 以便于在后面插入文章时用到这个分类id, 如果没有的话就插入这个分类然后再得到她的分类id值
        conn.execute("""select id from aainfo_category where name = %s""", (item['fenlei'], ))
        category_id = conn.fetchone()
        if not category_id:
            conn.execute("INSERT INTO aainfo_category (`name`, `slug`, `chaodai`, `num`, `description`, `jianjie`, `weburl`) VALUES (%s, %s, %s, %s, %s, %s, %s)", (item['category_name'], item['category_slug'], item['category_chaodai'], 0, item['category_description'], item['category_jianjie'], item['category_weburl']))
            #conn.commit()
            conn.execute("""select id from aainfo_category where name = %s""", (item['fenlei'], ))
            category_id = conn.fetchone()
            print (category_id)
        category_id = category_id[0]
        print (category_id)
        if isinstance(item, vodItem):
            query = self.dbpool.runInteraction(self.insert_into_info, item).addErrback(self.handle_error)            return item