No module named ‘haystack.urls‘等各種django報錯解決方案

報錯：ModuleNotFoundError: No module named ‘haystack.urls’
解決：

pip uninstall haystack
pip install django-haystack

報錯：cannot import name ‘smart_text’ from ‘django.utils.encoding’
解決：setting.py中添加

import django
from django.utils.encoding import smart_str
django.utils.encoding.smart_text = smart_str

報錯：ModuleNotFoundError: No module named ‘haystack.backends.whoosh_cn_backend’

解決：setting.py中修改

'ENGINE': 'haystack.backends.whoosh_cn_backend.WhooshEngine',

為：

 'ENGINE': 'haystack.backends.whoosh_backend.WhooshEngine',

報錯： cannot import name ‘url’ from ‘django.conf.urls’
解決：

pip install Whoosh

修改：

from django.conf.urls import url

為：

from django.urls import re_path as url

報錯：django.db.utils.OperationalError: (1045, “Access denied for user ‘root’@‘localhost’ (using password: YES)”)

這是mysql密碼錯了，到對應位置修改為正確密碼：

報錯：installing mysqlclient error: mysqlclient 1.4.0 or newer is required； you have 0.9.3
解決：

pip3 uninstall mysqlclient
pip3 uninstall pymysql
pip3 install mysqlclient
pip3 install pymysql