django项目的bug

最新推荐文章于 2023-11-15 16:49:34 发布

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最新推荐文章于 2023-11-15 16:49:34 发布

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分类专栏： web项目bug

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在运行Django项目时遇到了fields.E300错误，原因是模型抽象基类BaseModel的元类名称错误。修复这个问题需要将Mete更正为Meta。另外，还遇到了ValueError，提示依赖于没有迁移的user应用。解决方法是通过运行`python manage.py makemigrations`和`python manage.py migrate`来生成和应用数据库迁移。

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python manage.py runserver运行项目会出现以下错误

1.ERRORS:
goods.Goods.basemodel_ptr: (fields.E300) Field defines a relation with model 'BaseModel', which is either not installed, or is abstract.
goods.GoodsImage.basemodel_ptr: (fields.E300) Field defines a relation with model 'BaseModel', which is either not installed, or is abstract.
goods.GoodsSKU.basemodel_ptr: (fields.E300) Field defines a relation with model 'BaseModel', which is either not installed, or is abstract.
goods.GoodsType.basemodel_ptr: (fields.E300) Field defines a relation with model 'BaseModel', which is either not installed, or is abstract.

错误原因是：

模型抽象基类里面元类写错名字导致的没有找到BaseModel类

#coding:utf-8
from django.db import models

class BaseModel(models.Model):
"""模型抽象基类"""
crete_time = models.DateTimeField(auto_now_add=True, verbose_name='创建时间')
update_time = models.DateTimeField(auto_now=True, verbose_name='更新时间')
is_delete = models.BooleanField(default=False, verbose_name='删除标记')

class Mete: 改成Meta:
# 说明是一个模型抽象基类
abstract = True

错误2

File "/home/python/.virtualenvs/py3/lib/python3.5/site-packages/django/db/migrations/loader.py", line 314, in build_graph
parent = self.check_key(parent, key[0])
File "/home/python/.virtualenvs/py3/lib/python3.5/site-packages/django/db/migrations/loader.py", line 175, in check_key
raise ValueError("Dependency on app with no migrations: %s" % key[0])
ValueError: Dependency on app with no migrations: user

解决方法：生成数据库迁移文件

python manage.py makemigrations ,再运行项目就可以了

python manage.py migrate 生成数据库表