Django投票教程在应用程序轮询中未检测到任何更改 [英] Django Polls Tutorial No changes detected in app polls

问题描述

我正在通过Django投票教程，我正在尝试命令python manage.py makemigrations polls，并且我不断收到消息app中没有检测到任何更改

我不明白我做错了什么，或者我可以做的不一样，甚至是什么信息。

编辑清楚：

我希望有些像本教程中的打印输出：

 code>民意调查的迁移：
 0001_initial.py：
  - 创建模型问题
  - 创建模型选择
  

然后在本教程中，当它请求我输入命令 python manage.py sqlmigrate polls 0001 时，我得到一些打印输出，像显示的（这是相当长的）。我正在 https://docs.djangoproject.com/en/ 1.7 / intro / tutorial01 /

相反，我得到

  CommandError：找不到迁移匹配'polls'表单应用程序'0001'。是否在INSTALLED_APPS？ 
  

解决方案

问题最终是models.py wasn' t在迁移前填写。它应该是这样的。

models.py 文件：

 $ $ $ $ $ $ $ $ $ $ $ $ $ $ 
 
 class问题（models.Model）：
 question_text = models.CharField（max_length = 200）
 pub_date = models .DateTimeField（'date published'）
 
 
 class Choice（models.Model）：
 question = models.ForeignKey（Question）
 choice_text = models.CharField max_length = 200）
 vote = models.IntegerField（default = 0）
  

还要确定'polls.py'列在'settings.py'文件的'INSTALLED_APPS'中。

I'm going through the Django Polls tutorial, and I'm trying the command "python manage.py makemigrations polls", and I keep getting the message "No changes detected in app 'polls'"

I don't understand what I'm doing wrong or how I could do it differently, or what the message even means.

EDIT for clarity:

I expect something somewhat like the printout on the tutorial:

Migrations for 'polls':
  0001_initial.py:
    - Create model Question
    - Create model Choice

And then later in the tutorial, when it requests I type the command python manage.py sqlmigrate polls 0001, that I get some sort of printout like the one shown (which is rather long). I'm working off the tutorial at https://docs.djangoproject.com/en/1.7/intro/tutorial01/

Instead, I get

CommandError: Cannot find a migration matching 'polls' form app '0001'. Is it in INSTALLED_APPS?

解决方案

The issue ended up being that models.py wasn't filled out before the migration. It should look like this.

models.py file:

from django.db import models 

class Question(models.Model): 
    question_text = models.CharField(max_length=200) 
    pub_date = models.DateTimeField('date published') 


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

Also be sure that 'polls' is listed in the 'INSTALLED_APPS' of your 'settings.py' file.

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