在Django项目中,当你遇到错误 (1046, 'No database selected') 时,这通常意味着Django在尝试执行数据库操作时没有指定要使用的数据库。这个错误经常出现在数据库配置不正确的情况下。 要解决这个问题,请按照以下步骤操作: 检查settings.py 文件中的 DATABASES 配置: 确保你已经正确配置了数据库连接信息,包括数据库...
added Pull request at https://github.com/django/django/pull/3363 comment:5 by Tim Graham <timograham@…>, 10年 ago 处理结果: → fixed 状态: assigned→ closed In 5732424beed38f81870f2dd9d913310bca1eaf44: Fixed #23629 -- Allowed autodetector to detect changes in Meta.db_tabl...
错误详情: raise MigrationSchemaMissing("Unable to create the django_migrations table (%s)" % exc) django.db.migrations.exceptions.MigrationSchemaMissing: Unable to create the django_migrations table ((1064, "You have an error in your SQL syntax; check the manual that corresponds to your MySQL ...
报错: raiseMigrationSchemaMissing("Unable to create the django_migrations table (%s)"% exc) 原因: Django2.1不再支持MySQL5.5,必须5.6版本以上 解决办法: 二选一 (1)Django降级到2.0 pip install Django==2.0.0 -i https://pypi.douban.com/simple (2)MySQL升级...
The sql_for_many_to_many_field and sql_destroy_many_to_many methods aren't called from anywhere in Django code anymore but were kept for backward compatibility with third-party code. They will just always raise: AttributeError: 'ManyToManyField' object has no attribute 'creates_table'附件...
django-db-constraints What is this? Add database table-level constraints to your Django model's Meta class and havemakemigrationsadd the appropriate migration. classFoo(models.Model):bar=models.IntegerField()baz=models.IntegerField()classMeta:db_constraints={'bar_equal_baz':'check (bar = baz)...
环境:python3.6 + django2.1 +mysql5.5 执行python manage.py migrate时报错如下 “Unable to create the django_migrations table (%s)” % exc django.db.migrations.exceptions.MigrationSchemaMissing: Unable to create the django_migrations table ((1064, “You have an error in your SQL syntax; check th...
File "/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-packages/MySQLdb/connections.py", line 239, in query _mysql.connection.query(self, query) django.db.utils.OperationalError: (1824, "Failed to open the referenced table 'user_info'") zp@zpdeMac Joy_QA_Platform %...
So below we create a database table called Video. from django.db import models class Video(models.Model): name= models.CharField(max_length=500) videofile= models.FileField(upload_to='videos/', null=True, verbose_name="") def __str__(self): return self.name + ": " ...
raise MigrationSchemaMissing("Unable to create the django_migrations table (%s)" % exc) django.db.migrations.exceptions.MigrationSchemaMissing: Unable to create the django_migrations table ((1064, "You have an error in your SQL syntax; check the manual that corresponds to your MySQL server versi...