Django uses the problems encountered

Challenges: 
　　display 1.python3 manage.py makemigrations: Your version may need to upgrade 
　　Solution: 1 upgrade version 2. Find the lib / pythonxx / site-packages / django / db / backends / mysql / base to base folder inside to check the version of the code notes about 
　　
　　2 error: AttributeError: 'str' object has no attribute 'decode 
　　solution: find lib / pythonxx / site-packages / django / db / backends / mysql / operations file, an error local decode to encode 
　　
　　3. Create database when the coding problem, generally utf-8, otherwise the data can not be introduced inside the input Chinese pycharm 
　　
　　4. the operation of the page when: html // paths inside it enlarged 
　　
　　5. in Django which database foreign key connection:
　　Publisher = models.ForeignKey (to = "Publisher", on_delete = models.CASCADE) 
　　my own version need to add 
　　　on_delete = models.CASCADE

　　6.