[英]Django to Heroku, How to migrate sqlite3 data to postgres
我試圖在 heroku 上托管一個網站,但我不斷收到此錯誤
文件“/app/.heroku/python/lib/python3.9/site-packages/django/db/backends/utils.py”,第 84 行,在 _execute 中返回 self.cursor.execute(sql, params) django.db .utils.ProgrammingError:關系“home_product”不存在第1行:...home_product”。“價格”,“home_product”。“slug” FROM“home_prod ...
每當我嘗試使用
heroku run python
manage.py migrate -a appname
我主要將此視頻用作托管的參考。
還有這個 StackOverflow 問題和這篇文章也沒有對這個問題有太多的了解。
這是我的settings.py
"""
Django settings for Corbett_Jewelry project.
Generated by 'django-admin startproject' using Django 3.1.7.
For more information on this file, see
https://docs.djangoproject.com/en/3.1/topics/settings/
For the full list of settings and their values, see
https://docs.djangoproject.com/en/3.1/ref/settings/
"""
from pathlib import Path
import os
import django_heroku
import dj_database_url
from decouple import config
import psycopg2
# 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/3.1/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 = os.environ.get('DJANGO_DEBUG', '') != 'False'
ALLOWED_HOSTS = ['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',
'home'
]
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 = 'Corbett_Jewelry.urls'
TEMPLATES = [
{
'BACKEND': 'django.template.backends.django.DjangoTemplates',
'DIRS': [os.path.join(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 = 'Corbett_Jewelry.wsgi.application'
# Password validation
# https://docs.djangoproject.com/en/3.1/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/3.1/topics/i18n/
LANGUAGE_CODE = 'en-us'
TIME_ZONE = 'UTC'
USE_I18N = True
USE_L10N = True
USE_TZ = True
# Static files (CSS, JavaScript, Images)
# https://docs.djangoproject.com/en/3.1/howto/static-files/
STATIC_URL = '/static/'
STATICFILES_DIRS = [
os.path.join(BASE_DIR, 'static'),
]
STATIC_ROOT = os.path.join(BASE_DIR, 'static_root')
STATICFILES_STORAGE = 'whitenoise.storage.CompressedManifestStaticFilesStorage'
MEDIA_URL = '/media/'
MEDIA_ROOT = os.path.join(BASE_DIR, 'media')
DATABASE_URL = os.environ['DATABASE_URL']
conn = psycopg2.connect(DATABASE_URL, sslmode='require')
DATABASES['default'] = dj_database_url.config(conn_max_age=600, ssl_require=True)
db_from_env = dj_database_url.config(conn_max_age=500)
DATABASES['default'].update(db_from_env)
django_heroku.settings(locals())
我的models.py
:
from django.db import models
class Product(models.Model):
name = models.CharField(max_length=100)
image = models.ImageField(blank=True)
desc = models.TextField()
price = models.IntegerField()
slug = models.SlugField(unique=True, default=None)
def __str__(self):
return self.name
class Images(models.Model):
product = models.ForeignKey(Product, default=None, on_delete=models.CASCADE)
img = models.ImageField(upload_to='images/')
def __str__(self):
return self.product.name
class Beads(models.Model):
name = models.CharField(max_length=200)
price = models.IntegerField()
img = models.ImageField(upload_to='beads/')
我的檔案:
web: gunicorn Corbett_Jewelry.wsgi
我的requirements.txt
:
asgiref==3.4.1
cycler==0.10.0
dj-database-url==0.5.0
Django==3.2.9
django-heroku==0.3.1
gunicorn==20.1.0
kiwisolver==1.3.2
matplotlib==3.4.3
numpy==1.21.2
Pillow==8.3.2
psycopg2==2.9.2
pyparsing==2.4.7
python-dateutil==2.8.2
python-decouple==3.5
pytz==2021.3
selenium==3.141.0
six==1.16.0
sqlparse==0.4.2
urllib3==1.26.7
whitenoise==5.3.0
我不知道您可能還需要什么信息來解決這個問題。 我很高興提供任何信息,因為我已經為此苦苦掙扎了一周。
@Gamingapple ...正如您在評論中所問的那樣,我將嘗試為您的問題提供我能想到的所有可能的解決方案。
我從未使用過 Heroku,但這是我會嘗試的第一個解決方案:
1. A quick read from Heroku's help docs is showing you perhaps are not running migrations in the way that Heroku thinks are best practices for migrations: https://help.heroku.com/GDQ74SU2/django-migrations there (more-or- less) 意味着您應該在本地運行遷移,向上推到 Git,然后 Heroku 將在部署時自動運行遷移,其中指出:
Then, add the following as the first line in your Procfile:
release: python manage.py migrate
但請注意,這也意味着您應該在本地開發中使用 Postgres,而不是 SQLite(如您的標題所示)。
- 除此之外,您似乎正在嘗試按應用程序運行遷移: manage.py migrate -a appname
, Django 確實有一些需要運行的常規遷移,所以我只是嘗試manage.py migrate
2.您在評論中注意到 PyPi 的dj_database_url
package: https://pypi.org/project/dj-database-url/中的dj_database_url.config()
返回一個空字典。 對我來說,如果沒有額外的信息,我會說這是您的問題所在,當您手動嘗試在 Heroku 實例中運行migrate
時; 沒有可查找或連接的數據庫。 為了解決這個問題,我將刪除dj_database_url
的使用(因為我也沒有使用它,我們正在調試),並為 Django 的DATABASES
手動編寫我的連接字符串,如下所示:
pip install psycopg2
或確保它在要求/安裝中。
將設置中的DATABASES
屬性更改為手動編寫,以便您知道它是什么(我們正在調試,所以也許在您啟動它之后,您可以使密碼收集更安全,例如作為環境變量)
DATABASES = {
'default': {
'ENGINE': 'django.db.backends.postgresql',
'NAME': '[HEROKU DB NAME]',
'USER': '[HEROKU DB USERNAME]',
'PASSWORD': '[HEROKU PASSWORD]',
'HOST': '{HEROKU HOST IP OR NAME FOR YOUR DB]',
'PORT': '[HEROKU DB PORT]',
}
}
現在正確地運行遷移命令:
python manage.py makemigrations
python manage.py migrate
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