Django model字段类型解析
Model字段认识
V=models.CharField(max_length=None<, **options>) #varchar
V=models.EmailField() #varchar
V=models.URLField() #varchar
V=models.FileField(upload_to=None<, max_length=100, **options>) #varchar #upload_to指定保存目录可带格式,
V=models.ImageField(upload_to=None<, height_fie