我有一个Django项目,为Django设置了默认数据库,但也需要访问旧数据库。我在设置和数据库路由器中工作。来自Django应用程序的模型对象本身出现在管理员中。但是,遗留数据库Django应用程序中的模型不会出现在管理员的权限部分下,我希望创建一个Django组,其具有这些模型/表的权限,供员工执行CRUD查找表上的函数。这是我的设置:
数据库:
DATABASES = {
'default': {
'ENGINE': 'django.db.backends.postgresql_psycopg2',
'NAME': 'mysite_classroom_d',
'USER': 'mysite_classroom_user',
'PASSWORD': '',
'HOST': 'mysite-pg1.institution.edu',
'PORT': '5432',
},
'mssqlmysite': {
'ENGINE': 'sql_server.pyodbc',
'HOST': 'sql14-dev.institution.edu',
'PORT': '1433',
'NAME': 'mysite',
'USER': 'mysite_user',
'PASSWORD': '',
'AUTOCOMMIT': True,
'OPTIONS': {
'driver': 'FreeTDS',
'autocommit': True,
'unicode_results': True,
'host_is_server': True,
'extra_params': 'tds_version=7.2',
},
},
}
我的路由器;遗留数据库应用程序被称为' formingitor':
class FormEditorRouter(object):
"""
A router to control all database operations on models in the
formeditor application.
"""
def db_for_read(self, model, **hints):
"""
Attempts to read formeditor models go to mssqlmysite.
"""
if model._meta.app_label == 'formeditor':
return 'mssqlmysite'
return None
def db_for_write(self, model, **hints):
"""
Attempts to write formeditor models go to mssqlmysite.
"""
if model._meta.app_label == 'formeditor':
return 'mssqlmysite'
return None
def allow_relation(self, obj1, obj2, **hints):
"""
Allow relations if a model in the formeditor app is involved.
"""
if obj1._meta.app_label == 'formeditor' or \
obj2._meta.app_label == 'formeditor':
return True
return None
def allow_migrate(self, db, app_label, model=None, **hints):
"""
Make sure the formeditor app only appears in the 'mssqlmysite'
database.
"""
if app_label == 'formeditor':
return db == 'mssqlmysite'
return None
示例模型:
class DataCompanyMap(models.Model):
vendor_id = models.IntegerField(blank=True, null=True)
product_id = models.IntegerField(blank=True, null=True)
file_id = models.IntegerField(blank=True, null=True)
var_name = models.TextField(blank=True)
common_var_name = models.TextField()
searchable = models.NullBooleanField()
example = models.TextField(blank=True)
description = models.TextField(blank=True)
class Meta:
managed = False
db_table = 'data_company_map'
我认为问题可能是managed = False
,但即使将旧版数据库模型更改为managed = True
也不会使其显示在Django Admin的权限部分中。这里有什么想法? Django Admin是否只能处理默认数据库中的模型,因为histitor和admin都在默认数据库中?我有谷歌并通过Django文档进行检查,但似乎无法找到明确的答案,我希望找到一个解决方案或者我错过的明显的东西。提前谢谢你抽出时间。
答案 0 :(得分:0)
对我来说,我错过了“in_db”Meta param,但也许你的路由器不能像这样工作。 还要确保将路由器指向设置DATABASE_ROUTERS
它对我有用的解决方案:
我的路由器:(来自:https://djangosnippets.org/snippets/2687/)
class ModelDatabaseRouter(object):
"""Allows each model to set its own destiny"""
def db_for_read(self, model, **hints):
# Specify target database with field in_db in model's Meta class
if hasattr(model._meta, 'in_db'):
return model._meta.in_db
return None
def db_for_write(self, model, **hints):
# Specify target database with field in_db in model's Meta class
if hasattr(model._meta, 'in_db'):
return model._meta.in_db
return None
def allow_syncdb(self, db, model):
# Specify target database with field in_db in model's Meta class
if hasattr(model._meta, 'in_db'):
if model._meta.in_db == db:
return True
else:
return False
else:
# Random models that don't specify a database can only go to 'default'
if db == 'default':
return True
else:
return False
设置中的添加:
DATABASE_ROUTERS = ['api.routers.ModelDatabaseRouter']
然后是模型:
class DataCompanyMap(models.Model):
..... The fields ....
class Meta:
in_db = 'mssqlmysite'