似乎无法让Python，Peewee，pymysql和MySql数据库工作没有"returning_clause"错误

Question

我对Python很陌生，并尝试使用一个非常简单的单表数据库。

我正在使用python 3，peewee和pymysql。数据库是MySQL，在我的Windows 10 PC(wampserver(上本地，代码是;

import pymysql
pymysql.install_as_MySQLdb()
import MySQLdb
import peewee
from peewee import *
db = MySQLdb.connect(user='xxxxx', passwd='xxxxx',
                     host='localhost', port=3306, db='xxxxx')

class SearchUrl(peewee.Model):
    id = peewee.AutoField()
    url = peewee.TextField()
    page_title = peewee.TextField()
    date_found = peewee.DateField()
    date_last_changed = peewee.DateField()
    article_status = peewee.CharField()
    description = peewee.TextField()
    class Meta:
        database = db

newUrl = SearchUrl.create(url='http://cropnosis.co.uk', page_title="Cropnosis Ltd.",
                          date_found='2018-04-13', status='new', description='Cropnosis website')
newUrl.save()
for url in SearchUrl.filter(url='http://cropnosis.co.uk'):
    print(url.description)
db.close()

每当我运行它时，我都会在">SearchUrl.create"行中收到以下错误。我已经搜索了"returning_clause"属性，但很少或根本没有提到它，尤其是关于MySQL。

任何帮助或相关链接非常感谢。

Traceback (most recent call last):
  File "researcherDb.py", line 26, in <module>
    date_found='2018-04-13', status='new', description='Cropnosis website')
  File "C:.devClientCropnosisResearcherlibsite-packagespeewee.py", line 5161, in create
    inst.save(force_insert=True)
  File "C:.devClientCropnosisResearcherlibsite-packagespeewee.py", line 5284, in save
    pk_from_cursor = self.insert(**field_dict).execute()
  File "C:.devClientCropnosisResearcherlibsite-packagespeewee.py", line 5128, in insert
    return ModelInsert(cls, cls._normalize_data(__data, insert))
  File "C:.devClientCropnosisResearcherlibsite-packagespeewee.py", line 5868, in __init__
    if self.model._meta.database.returning_clause:
AttributeError: 'Connection' object has no attribute 'returning_clause'

Answer 1

你想要这个：

from peewee import *
# this is peewee.MySQLDatabase, not pymysql's connection class.
db = MySQLDatabase('the_db_name', user='xxxxx', passwd='xxxxx')