django.db.utils.InternalError: (1050, "Table 'tb_content' already exists") 在goods应用里面写了tb_content数据表的模型类(不该写在这里的),进行了数据迁移,还导入了数据。 在contents应用里也写了tb_content数据表的模型类(应该写在这里的), 解决办吧: 代码上,删除goods里面的。 python manage.py migrate...
File"D:\python_learn\meiduo_project\env\lib\site-packages\django\db\utils.py", line 94,in__exit__six.reraise(dj_exc_type, dj_exc_value, traceback) File"D:\python_learn\meiduo_project\env\lib\site-packages\django\utils\six.py", line 685,inreraiseraisevalue.with_traceback(tb) File"...
File"D:\python_learn\meiduo_project\env\lib\site-packages\django\db\utils.py", line 94,in__exit__six.reraise(dj_exc_type, dj_exc_value, traceback) File"D:\python_learn\meiduo_project\env\lib\site-packages\django\utils\six.py", line 685,inreraiseraisevalue.with_traceback(tb) File"...
Table 1. Overview of alternative powered track work machinery. Up to now, alternative solutions for track work machinery are mostly hybrid systems rather than stand-alone solutions. Smaller (lighter) track maintenance tools (e.g., portable tampers), which run on battery power alone are an exc...
Table 1. Overview of alternative powered track work machinery. Up to now, alternative solutions for track work machinery are mostly hybrid systems rather than stand-alone solutions. Smaller (lighter) track maintenance tools (e.g., portable tampers), which run on battery power alone are an exc...
Table 2 further classifies the patents based on whether they belong to the class of safety equipment or method, robotic devices or sensors, or experimental setup or method. As shown in Table 2, until 2010, there were no patents on the implementation of WSN and IoT. However, the application...
The results of influence test indicate that market condition and accessibility such as housing value and proximity to highway are strong predictors of vacant land in both Chicago and Fort Worth (See Table 4 and Figure 3). It is well known the fact that better access to transportation is ...