ModuleNotFoundError：没有名为“__main __。models”的模块; '__main__'不是一个包 [英] ModuleNotFoundError: No module named '__main__.models'; '__main__' is not a package

问题描述

目前在Django网站上工作，我从我的 models.py 模块导入一个类及其属性到我的视图中.py 模块在我的音乐应用程序。从我所理解的Django使用元类构造模型，所以定义的字段不会最终作为类上的属性。是这个问题，如果是这样我该怎么解决呢？

Currently working on a Django website and I'm having an issue importing a class and its attributes from my models.py module into my views.py module within my music app. From what I understand Django uses metaclasses to construct models, so the defined fields don't end up as attributes on the class. Is this the problem and if so how do I solve it?

目录结构：

music  
    migrations  
    templates  
         _init_
         admin.py   
         apps.py  
         models.py  
         tests.py  
         urls.py  
         views.py  

models.py 中的代码是：

from django.db import models
class Album(models.Model):
    artist = models.CharField(max_length=250)
    album_title = models.CharField(max_length=500)
    genre = models.CharField(max_length=100)
    album_logo = models.CharField(max_length=1000)

def __str__(self):
    return self.album_title + ' - ' + self.artist

views.py 中的代码是：

from django.http import HttpResponse
from .models import Album
from django.template import loader

def index(request):
    all_albums = Album.object.all()
    template = loader.get_template('music/index.html')
    context = {'all albums': all_albums,}
    return HttpResponse(template.render(context, request))

def details(request, album_id):
    return HttpResponse("<h2> Details for Album id: " + str(album_id) + "  </h2>")

strong>错误：

The Error:

ModuleNotFoundError: No module named '__main__.models'; '__main__' is not a package

错误位置：
从.models导入相册

推荐答案

您的 __ str __ 方法必须定义为专辑类，否则self是未定义的

Your __str__ method must be defined into Album class, otherwise self is undefined

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