NoneType object has no attribute encoding

採用scrapy 爬取數據，採用異步方式保存數據到數據庫時候，運行 報錯如下：

2020-06-03 17:28:37 [scrapy.core.engine] INFO: Spider closed (finished)
[Failure instance: Traceback: <class 'AttributeError'>: 'NoneType' object has no attribute 'encoding'
/Library/Frameworks/Python.framework/Versions/3.6/lib/python3.6/threading.py:916:_bootstrap_inner
/Library/Frameworks/Python.framework/Versions/3.6/lib/python3.6/threading.py:864:run
/Users/gengli/code/venv/lib/python3.6/site-packages/twisted/_threads/_threadworker.py:46:work
/Users/gengli/code/venv/lib/python3.6/site-packages/twisted/_threads/_team.py:190:doWork
--- <exception caught here> ---
/Users/gengli/code/venv/lib/python3.6/site-packages/twisted/python/threadpool.py:250:inContext
/Users/gengli/code/venv/lib/python3.6/site-packages/twisted/python/threadpool.py:266:<lambda>
/Users/gengli/code/venv/lib/python3.6/site-packages/twisted/python/context.py:122:callWithContext
/Users/gengli/code/venv/lib/python3.6/site-packages/twisted/python/context.py:85:callWithContext
/Users/gengli/code/venv/lib/python3.6/site-packages/twisted/enterprise/adbapi.py:460:_runInteraction
/Users/gengli/code/venv/lib/python3.6/site-packages/twisted/enterprise/adbapi.py:36:__init__
/Users/gengli/code/venv/lib/python3.6/site-packages/twisted/enterprise/adbapi.py:76:reconnect
/Users/gengli/code/venv/lib/python3.6/site-packages/twisted/enterprise/adbapi.py:427:connect
/Users/gengli/code/venv/lib/python3.6/site-packages/pymysql/__init__.py:94:Connect
/Users/gengli/code/venv/lib/python3.6/site-packages/pymysql/connections.py:283:__init__

相關代碼如下：

class MysqlTwistedPipeline(object):

    def __init__(self, dbpool):

        self.dbpool = dbpool

    @classmethod
    def from_settings(cls,settings):
        from pymysql.cursors import DictCursor
        dbparms = dict(
            host =settings['MYSQL_HOST'],
            db =settings['MYSQL_DBNAME'],
            user =settings['MYSQL_USER'],
            passwd =settings['MYSQL_PASSWORD'],
            charset ='utf-8',
            cursorclass =DictCursor,
            use_unicode = True
        )
        dbpool = adbapi.ConnectionPool('pymysql',**dbparms)
        return cls(dbpool)

    def process_item(self, item, spider):
        query = self.dbpool.runInteraction(self.do_insert,item)
        query.addErrback(self.hand_error,item,spider)

    def hand_error(self, failure, item, spider):
        '''
        回調異常處理
        :param failure:
        :param item:
        :param spider:
        :return:
        '''
        print(failure)

    def do_insert(self, cursor, item):
        '''
        數據插入
        :param cursor:
        :param item:
        :return:
        '''
        print('@'*100)
        insert_sql = '''insert into jobbole_article
        (title,url,url_object_id,front_image_url,front_image_path,parise_nums,comment_nums,fav_nums,tags,content,create_date)
                     values(%s,%s,%s,%s,%s,%s,%s,%s,%s,%s,%s)
                    '''
        params=list()
        params.append(item.get('title',''))
        params.append(item.get('url', ''))
        params.append(item.get('url_object_id', ''))
        img_url = item.get('front_image_url', [])
        if img_url:
            img_url = ','.join(img_url)
        params.append(img_url)
        params.append(item.get('front_image_path', ''))
        params.append(item.get('parise_nums', 0))
        params.append(item.get('comment_nums', 0))
        params.append(item.get('fav_nums', 0))
        params.append(item.get('tags', ''))
        params.append(item.get('content', ''))
        params.append(item.get('create_date', '2020-06-03'))
        cursor.execute(insert_sql,tuple(params))

解決辦法是：

 

@classmethod
def from_settings(cls,settings):
    from pymysql.cursors import DictCursor
    dbparms = dict(
        host =settings['MYSQL_HOST'],
        db =settings['MYSQL_DBNAME'],
        user =settings['MYSQL_USER'],
        passwd =settings['MYSQL_PASSWORD'],
        charset ='utf-8', #改爲utf8
        cursorclass =DictCursor,
        use_unicode = True
    )