技術標籤：django開發python語言pythondjango

Django2.2報錯 AttributeError: 'str' object has no attribute 'decode'

準備將 Django 連線到 MySQL，在命令列輸入命令python manage.py makemigrations後報錯：AttributeError: 'str' object has no attribute 'decode'
出現這個錯誤之後可以根據錯誤提示找到檔案位置，開啟 operations.py 檔案，找到以下程式碼：

def last_executed_query(self, cursor, sql, params):
    # With MySQLdb, cursor objects have an (undocumented) "_executed"
    # attribute where the exact query sent to the database is saved.
    # See MySQLdb/cursors.py in the source distribution.
    query = getattr(cursor, '_executed', None)
    if query is not None:
        query = query.decode(errors='replace')
    return query

 

根據錯誤資訊提示，說明 if 語句執行時出錯， query 是 str 型別，而decode()是用來將 bytes 轉換成 string 型別用的，（關於Python編碼點這裡），由於 query 不需要解碼，所以直接將 if 語句註釋掉就可以了

def last_executed_query(self, cursor, sql, params):
    # With MySQLdb, cursor objects have an (undocumented) "_executed"
    # attribute where the exact query sent to the database is saved.
    # See MySQLdb/cursors.py in the source distribution.
    query = getattr(cursor, '_executed', None)
    # if query is not None:
    #     query = query.decode(errors='replace')
    return query