将 django 部署到 heroku：找不到页面错误

Question

I have been making a django app, and am now trying to deploy it to heroku. However when I go on it,says page not found 
the resources not found on the server 

我正在不同的应用程序上尝试，错误仍然相同 这是我的settings.py（至少是相关部分，但请询问您是否想要其余部分）： ”“” django_deployment 项目的 Django 设置。

Generated by 'django-admin startproject' using Django 4.0.2.

For more information on this file, see
https://docs.djangoproject.com/en/4.0/topics/settings/

For the full list of settings and their values, see
https://docs.djangoproject.com/en/4.0/ref/settings/
"""

from pathlib import Path
import os 
import django_heroku
import dj_database_url
from decouple import config
# Build paths inside the project like this: BASE_DIR / 'subdir'.
BASE_DIR = Path(__file__).resolve().parent.parent


# Quick-start development settings - unsuitable for production
# See https://docs.djangoproject.com/en/4.0/howto/deployment/checklist/

# SECURITY WARNING: keep the secret key used in production secret!
SECRET_KEY = ''

# SECURITY WARNING: don't run with debug turned on in production!
DEBUG = True

ALLOWED_HOSTS = ['django-deployment85.herokuapp.com','127.0.0.1']


# Application definition

INSTALLED_APPS = [
    'django.contrib.admin',
    'django.contrib.auth',
    'django.contrib.contenttypes',
    'django.contrib.sessions',
    'django.contrib.messages',
    'django.contrib.staticfiles',
    'myapp'
]

MIDDLEWARE = [
    'django.middleware.security.SecurityMiddleware',
    'django.contrib.sessions.middleware.SessionMiddleware',
    'django.middleware.common.CommonMiddleware',
    'django.middleware.csrf.CsrfViewMiddleware',
    'django.contrib.auth.middleware.AuthenticationMiddleware',
    'django.contrib.messages.middleware.MessageMiddleware',
    'django.middleware.clickjacking.XFrameOptionsMiddleware',
     "whitenoise.middleware.WhiteNoiseMiddleware",
]

ROOT_URLCONF = 'django_deployment.urls'

TEMPLATES = [
    {
        'BACKEND': 'django.template.backends.django.DjangoTemplates',
        'DIRS': [BASE_DIR/'templates'],
        'APP_DIRS': True,
        'OPTIONS': {
            'context_processors': [
                'django.template.context_processors.debug',
                'django.template.context_processors.request',
                'django.contrib.auth.context_processors.auth',
                'django.contrib.messages.context_processors.messages',
            ],
        },
    },
]

WSGI_APPLICATION = 'django_deployment.wsgi.application'


# Database
# https://docs.djangoproject.com/en/4.0/ref/settings/#databases

DATABASES = {
    'default': {
        'ENGINE': 'django.db.backends.sqlite3',
        'NAME': BASE_DIR / 'db.sqlite3',
    }
}


# Password validation
# https://docs.djangoproject.com/en/4.0/ref/settings/#auth-password-validators

AUTH_PASSWORD_VALIDATORS = [
    {
        'NAME': 'django.contrib.auth.password_validation.UserAttributeSimilarityValidator',
    },
    {
        'NAME': 'django.contrib.auth.password_validation.MinimumLengthValidator',
    },
    {
        'NAME': 'django.contrib.auth.password_validation.CommonPasswordValidator',
    },
    {
        'NAME': 'django.contrib.auth.password_validation.NumericPasswordValidator',
    },
]


# Internationalization
# https://docs.djangoproject.com/en/4.0/topics/i18n/

LANGUAGE_CODE = 'en-us'

TIME_ZONE = 'UTC'

USE_I18N = True

USE_TZ = True


# Static files (CSS, JavaScript, Images)
# https://docs.djangoproject.com/en/4.0/howto/static-files/

STATIC_URL = 'static/'

#STATICFILES_STORAGE = "whitenoise.storage.CompressedManifestStaticFilesStorage"
STATICFILES_STORAGE =  'django.contrib.staticfiles.storage.StaticFilesStorage'
# Default primary key field type
# https://docs.djangoproject.com/en/4.0/ref/settings/#default-auto-field

DEFAULT_AUTO_FIELD = 'django.db.models.BigAutoField'
django_heroku.settings(locals())



#and here is my requirement.txt 
asgiref==3.4.1
backports.entry-points-selectable==1.1.1
certifi==2021.10.8
distlib==0.3.4
dj-database-url==0.5.0
Django==4.0
django-heroku==0.3.1
filelock==3.4.0
gunicorn==20.1.0
pipenv==2021.11.23
platformdirs==2.4.0
psycopg2==2.9.3
python-decouple==3.6
six==1.16.0
sqlparse==0.4.2
tzdata==2021.5
virtualenv==20.10.0
virtualenv-clone==0.5.7
virtualenvwrapper-win==1.2.6
waitress==2.0.0
whitenoise==6.0.0

另外，当我使用 python manage.py runserver 在本地运行该应用程序时，它工作正常，只有当我使用 heroku 时它才不起作用。

如果您需要更多信息，请告诉我。

Answer 1

你可能在 Heroku 中有 postgres，但你的 settings.py 显示你仍在使用 SQLite。 DATABASES 部分应如下所示：

DATABASES = {
    'default': {
        'ENGINE': 'django.db.backends.postgresql_psycopg2',
        'NAME': 'database_name_goes_here',
        'USER': 'username_goes_here',
        'PASSWORD': 'password_goes_here',
        'HOST': 'localhost',
        'PORT': '',
    }
}

您可以通过访问数据库获取数据库名称、用户和密码，然后单击“设置”，然后单击“凭据”。

在 Heroku 上部署 Django 有几个步骤。配置 Postgres 只是其中之一。有一个很好的教程 https://dev.to/giftedstan/heroku-how-to-deploy-a-django-app-with-postgres-in-5-minutes-5lk。