Django问题 - 随笔分类 - sewen

Django中间件middleware的使用

摘要：摘要 Django 中的中间件（middleware），是一个镶嵌到Django的request/response处理机制中的一个hooks框架，是一个修改django全局输入输出的一个底层插件系统。让我们可以自定义想要的一些功能来处理用户的请求。在Django中，中间件其实就是一个类，在类中包含阅读全文

posted @ 2020-09-21 21:40 sewen 阅读(650) 评论(0) 推荐(1)

django.db.migrations.exceptions.NodeNotFoundError: Migration users.0001_initial dependencies reference nonexistent parent node ('auth', '0009_auto_20200720_0228')

摘要：问题: (meiduo) D:\python_learn\meiduo_project\meiduo_mall>python manage.py makemigrations [<RegexURLPattern admins-list ^permission/admins/$>, <RegexURL 阅读全文

posted @ 2020-08-16 20:51 sewen 阅读(2289) 评论(0) 推荐(0)

celery运行报错:dns.exception.Timeout: The DNS operation timed out after 5.1539998054504395 seconds

摘要：celery运行时报错, 报错如下: Traceback (most recent call last): File "d:\python_learn\meiduo_project\env\lib\site-packages\eventlet\support\greendns.py", line 4 阅读全文

posted @ 2020-08-16 15:21 sewen 阅读(1468) 评论(1) 推荐(0)

redis.exceptions.DataError: Invalid input of type: 'CacheKey',Convert to a bytes, string, int or float first. 问题

摘要：redis升级到3.0以后不支持 bytes, string, int , float以外的数据类型; 将redis降级到2.10.6版本问题解决阅读全文

posted @ 2020-08-12 02:30 sewen 阅读(441) 评论(0) 推荐(0)

ValueError: localtime() cannot be applied to a naive datetime问题

摘要：在用python的django框架进行web开发的时候，出现了一个错误： Traceback (most recent call last): File "D:\Python27\lib\site-packages\django\core\handlers\exception.py", line 4 阅读全文

posted @ 2020-08-11 02:22 sewen 阅读(1376) 评论(0) 推荐(0)

django.db.migrations.graph.NodeNotFoundError: Migration travel_list.0001_initial dependencies reference nonexistent parent node ('employer', '0001_initial')问题

摘要：由于不小心将migrations目录下的0001_initial.py误删，运行makemigrations报错： manage.py@travel > makemigrations "C:\Program Files (x86)\JetBrains\PyCharm 2016.2.3\bin\run 阅读全文

posted @ 2020-08-11 02:02 sewen 阅读(1080) 评论(0) 推荐(0)

RuntimeWarning: DateTimeField User.date_joined received a naive datetime (2020-08-01 00:00:00) while time zone support is active. warnings.warn("DateTimeField %s.%s received a naive datetime "问题

摘要：django项目中比较时间参数操作数据库是,产生warning: RuntimeWarning: DateTimeField User.date_joined received a naive datetime (2020-08-01 00:00:00) while time zone suppor 阅读全文

posted @ 2020-08-07 14:43 sewen 阅读(2849) 评论(0) 推荐(0)

ModuleNotFoundError: No module named 'PIL'问题

摘要：Traceback (most recent call last): File "D:\python_learn\meiduo_project\env\lib\site-packages\django\utils\autoreload.py", line 228, in wrapper fn(*ar 阅读全文

posted @ 2020-08-06 16:45 sewen 阅读(984) 评论(0) 推荐(0)

ImportError: cannot import name 'Feature' from 'setuptools' (D:\python_learn\meiduo_project\env\lib\site-packages\setuptools\__init__.py)问题

摘要：查询后发现是,因MarkupSafe==1.0 版本较低，其引用Feature的方式from setuptools import Feature在新版本的setuptools包中已被弃用，所以导致了上文出现的bug。那解决思路就清晰了，如下思路取一即可。升级 MarkupSafe==1.1.1 阅读全文

posted @ 2020-08-06 16:37 sewen 阅读(2058) 评论(0) 推荐(0)

ERROR: Could not install packages due to an EnvironmentError: [WinError 145] 目录不是空的。: 'D:\\Python\\Python\\venv\\Lib\\site-packages\\~jango\\contrib\\postgres\\locale\\fr'

摘要：在安装django过滤插件时报错,如下: (venv) D:\python_learn\restfullearn\RESTAPI>pip install django-filter Looking in indexes: https://pypi.tuna.tsinghua.edu.cn/simpl 阅读全文

posted @ 2020-08-04 18:28 sewen 阅读(1141) 评论(0) 推荐(0)

django生成子应用是报错 '%s=%s' % (k, v) for k, v in params.items(), ^ SyntaxError: Generator expression must be parenthesized

摘要：报错如下: (venv) D:\python_learn\restfullearn\RESTAPI>python manage.py startapp book Traceback (most recent call last): File "manage.py", line 22, in <mod 阅读全文

posted @ 2020-07-30 23:10 sewen 阅读(328) 评论(0) 推荐(0)

django迁移文件出现django.db.utils.InternalError: (1050, "Table 'tb_goods_visit' already exists"),问题解决

摘要：Traceback (most recent call last): File "manage.py", line 22, in <module> execute_from_command_line(sys.argv) File "D:\python_learn\meiduo_project\env 阅读全文

posted @ 2020-07-28 15:06 sewen 阅读(727) 评论(0) 推荐(0)

Unable to get repr for <class 'django.db.models.query.QuerySet'>无法读取出mysql中的数据

摘要：D:\python_learn\meiduo_project\meiduo_mall\meiduo_mall\apps\goods\views.py:38: UnorderedObjectListWarning: Pagination may yield inconsistent results w 阅读全文

posted @ 2020-07-23 18:03 sewen 阅读(919) 评论(1) 推荐(1)

django中重写Storage中的url函数实现自动给mysql的Image属性链接增加域名出现{{ no such element: django.db.models.fields.files.ImageFieldFile object["url"] }}

摘要：1.根据课件上的教材重写Storage的url函数,方法如下: from django.core.files.storage import Storage from django.conf import settings class FastDFSStorage(Storage): """自定义文件阅读全文

posted @ 2020-07-23 05:20 sewen 阅读(605) 评论(3) 推荐(1)

django迁移文件时出错,然后发现只迁移成功一半的sql表格,另外一半重新执行命令无法迁移成功,解决方法

摘要：Traceback (most recent call last): File "manage.py", line 22, in <module> execute_from_command_line(sys.argv) File "D:\python_learn\meiduo_project\env 阅读全文

posted @ 2020-07-22 00:37 sewen 阅读(410) 评论(0) 推荐(0)

verbose_name_plural

摘要：class ContentCategory(BaseModel): name = models.CharField(max_length=50, verbose_name='名称') key = models.CharField(max_length=50, verbose_name='类别键名') 阅读全文

posted @ 2020-07-21 21:39 sewen 阅读(489) 评论(0) 推荐(0)

ModuleNotFoundError: No module named 'email.utils'问题

摘要：D:\python_learn\meiduo_project\env\Scripts\python.exe D:/python_learn/meiduo_project/meiduo_mall/manage.py runserver 8000 Traceback (most recent call 阅读全文

posted @ 2020-07-19 15:51 sewen 阅读(630) 评论(0) 推荐(0)

迁移文件时发现SyntaxError: Generator expression must be parenthesized

摘要：(env) D:\python_learn\meiduo_project\meiduo_mall>python manage.py makemigrations Traceback (most recent call last): File "manage.py", line 22, in <mod 阅读全文

posted @ 2020-07-18 15:26 sewen 阅读(189) 评论(0) 推荐(0)

Django迁移文件计算机无法访问虚拟机上的mysql[django.db.utils.OperationalError: (2003, "Can't connect to MySQL server on '127.0.0.1' ([WinError 10061] 由于目标计算机积极拒绝，无法连接。)")]

摘要：(env) D:\python_learn\meiduo_project\meiduo_mall>python manage.py makemigrations Traceback (most recent call last): File "manage.py", line 22, in <mod 阅读全文

posted @ 2020-07-18 13:04 sewen 阅读(1537) 评论(0) 推荐(0)

django.core.exceptions.ImproperlyConfigured: mysqlclient 1.3.13 or newer is required; you have 0.9.3.迁移文件时问题

摘要：(env) D:\python_learn\meiduo_project\meiduo_mall>python manage.py makemigrations Traceback (most recent call last): File "manage.py", line 22, in <mod 阅读全文

posted @ 2020-07-18 12:57 sewen 阅读(171) 评论(0) 推荐(0)

sewen

随笔分类 - Django问题

公告