在线程中创建的DatabaseWrapper对象只能在同一线程中使用."尝试使用celery插入数据库时 [英] DatabaseWrapper objects created in a thread can only be used in that same thread." when trying to insert into database using celery
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问题描述
我正在使用芹菜从csv读取数据并将其上传到Postgres.芹菜任务正在运行(我认为),但是django抛出错误.我正在获取文件,将其转换为熊猫,删除2列,然后转换为numpy并传递给芹菜.
I am using celery to read data from a csv and upload it to Postgres. The celery task is working(I think), but django is throwing an error. I am getting a file,converting it to pandas, deleting 2 columns, and converting to numpy and passing to celery.
#tasks.py
@shared_task
def a(data):
for x in data:
date=x[0]
date=datetime.datetime.strptime(date,"%m/%d/%Y")
date=str(date.date())
desc=x[1]
amount=x[3]
account=x[6]
cat=x[5]
account_type=x[4]
#changing account type
if account_type=="debit":
account_type=False
else:
account_type=True
#creating account if needed and assigning the the object to account
try:
account=t102_accounts.objects.get(c102_acc_name=account,c102_is_credit_fl=account_type)
except:
account=t102_accounts.objects.create(c102_acc_name=account,c102_is_credit_fl=account_type)
#creating cat if needed and assigning the object
try:
cat=t100_code_lookup.objects.get(c100_code_name=cat)
except:
cat=t100_code_lookup.objects.create(c100_code_name=cat,c100_for_exp_fl=True,c100_for_income_fl=True)
#creating the transaction if it is not existing already
try:
t106_transactions.objects.get(c106_trans_amount=amount,
c106_trans_date=date,c102_trans_card_num=account,
c100_trans_cat=cat,c106_trans_name=desc)
continue
except:
t106_transactions.objects.create(c106_trans_amount=amount,
c106_trans_date=date,c102_trans_card_num=account,
c100_trans_cat=cat,c106_trans_name=desc)
return 'done'
#calling the function in views
def upload(request):
if request.method=="POST":
form=UploadFile(request.POST,request.FILES)
if form.is_valid():
data=request.FILES["file"]
data=pd.read_csv(data)
del data["Notes"]
del data["Labels"]
data = data.dropna(axis=0)
data=data.to_numpy()
data=data.tolist()
a.delay(data)
return redirect(dashboard)
我的回溯在这里列出.追溯:
My traceback is listed here. Traceback:
File "c:\users\yogab\appdata\local\programs\python\python38-32\lib\site-packages\celery\utils\dispatch\signal.py", line 288, in send
response = receiver(signal=self, sender=sender, **named)
File "c:\users\yogab\appdata\local\programs\python\python38-32\lib\site-packages\celery\fixups\django.py", line 172, in on_task_postrun
self.close_database()
File "c:\users\yogab\appdata\local\programs\python\python38-32\lib\site-packages\celery\fixups\django.py", line 177, in close_database
return self._close_database()
File "c:\users\yogab\appdata\local\programs\python\python38-32\lib\site-packages\celery\fixups\django.py", line 186, in _close_database
conn.close()
File "c:\users\yogab\appdata\local\programs\python\python38-32\lib\site-packages\django\utils\asyncio.py", line 24, in inner
return func(*args, **kwargs)
File "c:\users\yogab\appdata\local\programs\python\python38-32\lib\site-packages\django\db\backends\base\base.py", line 286, in close
self.validate_thread_sharing()
File "c:\users\yogab\appdata\local\programs\python\python38-32\lib\site-packages\django\db\backends\base\base.py", line 553, in validate_thread_sharing
raise DatabaseError(
django.db.utils.DatabaseError: DatabaseWrapper objects created in a thread can only be used in that same thread. The object with alias 'default' was created in thread id 54283112 and this is thread id 8121832.```
推荐答案
我发现了问题所在:我在Windows上.
I found out the problem: I was on Windows.
一旦我部署到heroku(可在Linux上运行),它就会起作用.
Once I deployed to heroku(which runs on Linux), it worked.
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