Question

我使用Django 1.6。我像这样编辑models.py：

（我点这个链接：tutorial01）

from django.db import models
class Poll(models.Model):
    question = models.CharField(max_length=200)
    pub_date = models.DateTimeField('date published')

    def __str__(self):
                return self.question

class Choice(models.Model):
    poll = models.ForeignKey(Poll)
    choice_text = models.CharField(max_length=200)
    votes = models.IntegerField(default=0)

    def __str__(self):
               return self.choice_text

当我想执行此命令时，我收到错误。

python manage.py shell

我的错误是：

Traceback (most recent call last):
File "manage.py", line 10, in <module>
execute_from_command_line(sys.argv)
  File "C:\Python27\lib\site-packages\django\core\management\__init__.py", line
399, in execute_from_command_line
utility.execute()
  File "C:\Python27\lib\site-packages\django\core\management\__init__.py", line
392, in execute
self.fetch_command(subcommand).run_from_argv(self.argv)
  File "C:\Python27\lib\site-packages\django\core\management\base.py", line 242,
 in run_from_argv
 self.execute(*args, **options.__dict__)
  File "C:\Python27\lib\site-packages\django\core\management\base.py", line 285,
 in execute
 output = self.handle(*args, **options)
  File "C:\Python27\lib\site-packages\django\core\management\base.py", line 415,
 in handle
 return self.handle_noargs(**options)
  File "C:\Python27\lib\site-packages\django\core\management\commands\shell.py",
 line 70, in handle_noargs
 get_models()
  File "C:\Python27\lib\site-packages\django\db\models\loading.py", line 232, in
 get_models
 self._populate()
  File "C:\Python27\lib\site-packages\django\db\models\loading.py", line 75, in
_populate
self.load_app(app_name, True)
  File "C:\Python27\lib\site-packages\django\db\models\loading.py", line 99, in
load_app
models = import_module('%s.models' % app_name)
  File "C:\Python27\lib\site-packages\django\utils\importlib.py", line 40, in im
port_module
__import__(name)
  File "G:\Programing\Django\Project\mysite\polls\models.py", line 7
def __str__(self):
^
IndentationError: unexpected indent

我认为这一行中的某些事情是def __str__(self): return self.question rong？

Answer 1

您的def __str__需要与班级其他人的缩进级别相同。确保类主体和def的内容都缩进4个空格。您正在混合制表符和空格缩进，这会使解析器混淆。避免使用标签进行缩进 - 只需坚持每个级别4个空格。当您按Tab键时，您的编辑器应该可以选择插入4个空格。

Answer 2

首先检查文本编辑器。对我来说，我使用了Notepad ++，其中Notepad ++中的选项卡与Python选项卡中的选项卡不同。因此，在Python自己的文本编辑器中编辑代码会有所帮助。

其次在

     def str(self):

之前删除行差距您的代码应如下所示：

   
    from django.db import models

    class Poll(models.Model):
        question = models.CharField(max_length=200)
        pub_date = models.DateTimeField('date published')
        def __str__(self):
             return self.question

    class Choice(models.Model):
        poll = models.ForeignKey(Poll)
        choice_text = models.CharField(max_length=200)
        votes = models.IntegerField(default=0)
        def __str__(self):
              return self.choice_text

为什么我在这个命令python manage.py shell中有错误？

2 个答案: