multiple-databases

问题 I'm having trouble with the configuration of multiple DataSources in Grails 2.5.1. I'm using PostgreSQL 9.4.4, H2DB and hibernate 4.3.10 with GGTS. I'm getting the 'Table "XX" not found; SQL statement...' message and after a debug with the console, I found that the Session is returning the wrong driver: import teste.PTes; PTes.withSession { hibernateSession -> hibernateSession.getJdbcConnectionAccess().obtainConnection().getMetaData().getDriverName() } Result: H2 JDBC Driver This domain class

问题 I written a program to work with a MySQL database that powers my website and I have recently bought some reseller hosting however the hosting company has restricted external access on the shared server, so I was going to setup an external mySQL database on another server that can be accessed remotely, however to do this I need a PHP file on my reseller server that can connect to the local database and the remote database and sync them on request from the application via a url. Does anyone

问题 here I have a problem that I want to find a solution here, I work on a project using spring mvc and hibernate in my project I have several databases with same architecture (database by company) and a database for authentication, when the user login i have to generates a SessionFactory that corresponds to database of the user company, can you help me by offering me an architecture and give me some examples please, sorry for my English. 回答1: Depending on which hibernate version you use you can

问题 I'm trying to work out how to combine the results from the same table in 2 mysql databases using codeigniter. Both tables have the same column names, but the databases have different connection settings. I'm currently trying this: public function getAllNames() { $sql1 = <<SQL SELECT id, name, CONCAT(name, ' (', id, ')') AS name2 FROM db1.table ORDER BY name SQL; $sql2 = <<SQL SELECT id, name, CONCAT(name, ' (', id, ')') AS name2 FROM db2.table ORDER BY name SQL; $q = $this->db->query($sql1."

问题 I have two folders with csv files. A group of 'master' files and a group of 'unmatched' files. Within the master files (~25 files, about 50,000 lines in total), there are unique ids. Each row of the unmatched files (~250 files, about 700,000 lines in total) should have an id in the row that matches a single id in one of the master files. Within each of the unmatched files, all id's should match with a single master file. Further, all ids in the unmatched should fall within a single master.

问题 A relative newcomer to .net MVC2 and the entity framework, I am working on a project which requires a single web application, (C# .net 4), to connect to multiple different databases depending on the route of access, (ie subdomain). No problem with this in principle and all the logic is written to transform the subdomain into an entity connection and pass this through to the Entity Model. The problem comes with the fact that the different database whilst being largely similar in structure

问题 I want to create an App for Customers where every customer has its own DB. So as Login information they need to enter three different fields: customernumber, username, password. The username and password should do the normal authentication stuff and the customernumber is there to go to the right database user table for authentication i can go to other databases through the using() method but how do you authenticate a user through the right database? 回答1: You should write custom authentication

问题 I have a django application using multiple databases. Given an instance of a model, how can I obtain the database where it is stored (if any)? I need this to save another object to the same database as the first. def add_ducks_to_hunt(hunter): db = # the hunter's db duck = Duck() duck.save(using=db) 回答1: Use _state.db , as in: my_obj = MyModel.objects.get(pk=1) my_obj._state.db This is shown in the routing example. 回答2: I believe you are looking for settings.py in the project (top level)

问题 I am trying to access images from paperclip using establish_connection. Here is my code of model article.rb class Article < ActiveRecord::Base if Rails.env.production? establish_connection SECONDARY_DB_CONFIG else establish_connection "article_#{Rails.env}" end has_many :assets, dependent: :destroy accepts_nested_attributes_for :assets validates_associated :assets end file asset.rb class Asset < ActiveRecord::Base if Rails.env.production? establish_connection SECONDARY_DB_CONFIG else

问题 I am trying to create an application for multiple users with multiple database. Each time a user login ,App will select the particular user's database and fetch the values from it. Is it possible to implement it with Sugar ORM because in Sugar ORM , we can specify only One db in manifest <meta-data android:name="DATABASE" android:value="Example.db" /> Is there any possible to way to close the existing DB and select another DB? 回答1: You asked the same question on the Sugar GitHub Library.