在開發版本中,Django的新的多數據庫功能,我一直在努力創建一個管理命令,讓我將數據從活動站點同步到開發人員機器進行擴展測試。 (具有實際數據,特別是用戶輸入的數據,可以測試更廣泛的輸入範圍。)Django中的devel/live數據庫之間的數據同步
現在我已經有了一個「主要」工作命令。它可以同步「簡單」模型數據,但我遇到的問題是它忽略ManyToMany字段,我沒有看到它的任何理由。任何人有任何想法如何解決這個問題或更好地處理這個問題?我應該首先將第一個查詢導出到夾具,然後重新導入它?
from django.core.management.base import LabelCommand
from django.db.utils import IntegrityError
from django.db import models
from django.conf import settings
LIVE_DATABASE_KEY = 'live'
class Command(LabelCommand):
help = ("Synchronizes the data between the local machine and the live server")
args = "APP_NAME"
label = 'application name'
requires_model_validation = False
can_import_settings = True
def handle_label(self, label, **options):
# Make sure we're running the command on a developer machine and that we've got the right settings
db_settings = getattr(settings, 'DATABASES', {})
if not LIVE_DATABASE_KEY in db_settings:
print 'Could not find "%s" in database settings.' % LIVE_DATABASE_KEY
return
if db_settings.get('default') == db_settings.get(LIVE_DATABASE_KEY):
print 'Data cannot synchronize with self. This command must be run on a non-production server.'
return
# Fetch all models for the given app
try:
app = models.get_app(label)
app_models = models.get_models(app)
except:
print "The app '%s' could not be found or models could not be loaded for it." % label
for model in app_models:
print 'Syncing %s.%s ...' % (model._meta.app_label, model._meta.object_name)
# Query each model from the live site
qs = model.objects.all().using(LIVE_DATABASE_KEY)
# ...and save it to the local database
for record in qs:
try:
record.save(using='default')
except IntegrityError:
# Skip as the record probably already exists
pass
這是否適用於外鍵? – 2010-03-24 06:50:08
@Ofri - 如果具有該PK的記錄存在,它可以正常工作,但要確保「按順序」創建東西有點困難 – 2010-03-29 17:31:07
那麼對於M2M來說,也許它有同樣的問題?他們必須在兩個模型之後創建。 – 2010-03-30 13:46:08