multiple-databases | 易学教程

“Foreign Keys” across very separate databases in Django

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问题 I've writing a Django site that uses two different databases. One is the local, let's call it, "Django", database that stores all of the standard tables from a pretty standard install -- auth, sites, comments, etc. -- plus a few extra tables. Most of the data, including users, comes from a database on another server, let's call it the "Legacy" database. I'm looking for suggestions on clean, pythonic ways of connecting the two databases, particularly in regards to users. I'm using a proxy

Entity Framework: multiple DB having the same schema

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I have just created an ASP.NET MVC 4 & WebAPI project. After that I have added .edmx data source to project. I have multiple databases with the same schema. Dynamically I want to replace connection string using default constructor provided in EF. But in Model1.Designer.cs , every time I get error like "Member with same signature already declared". I'm unable to solve this problem. Yes, it works! All you need to change is the connection string . And I have just tested it in order to satisfy my own curiosity. Here are the steps that I took: 1. Take an existing database and create a model for it.

Yii : multiple databases connection fails

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i read the yii docs and the following code should work; well, it doesnt. :)) db is the primary database db1 and db2 are the secondary databases what is wrong here ? the website is online, at www.linkbook.co , and it cant connect to any of the databases 'db' => array( 'connectionString' => 'mysql:host=localhost;dbname=linkbookco', 'emulatePrepare' => true, 'username' => 'user', 'password' => 'password', 'charset' => 'utf8', 'tablePrefix' => '', ), 'db1' => array( 'connectionString' => 'mysql:host=localhost;dbname=linkbookco1', 'username' => 'user', 'password' => 'password', 'charset' => 'utf8',

Postgres databases with different encoding

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问题 I tried to create databases with different encoding in postgres (I'm using PgAdmin as my database manager), but when I try to create a database with non UTF8 encoding, PgAdmin shows me an error saying that I can't create the database because it does not match my current locale "Portuguese_Brazil_1252" and that the LC_Ctype configuration requires encoding "WIN1252". How do I configure that in PostGres? I'm running it under a locale test server with windows XP (not my choice). Is it possible to

Cannot connect to two postgres databases in rails 3.2.

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I've tried a few methods found on stack overflow for connecting to two database in rails two however non of them are working. Here's what I've got at the moment: In the database.yml there's two connection settings: development: adapter: postgresql host: localhost database: blerg username: postgres encoding: utf8 production: blah... test: &test blah... cucumber: <<: *test static_api_development: adapter: postgresql host: localhost database: blerg-static-api username: postgres encoding: utf8 static_api_production: blah... static_api_test: blah... And then I have lots of normal models in the

Hibernate using multiple databases

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问题 I need to have multiple databases for different customers. How can I handle multiple databases with Hibernate? Are there any good examples how to do this? I could create Configuration object and then build SessionFactory, but that would create always a new session factory which wouldn't be very wise. EDIT: Now I can get hibernate Configuration object when user logs in, but how can I create/get session factory with that object so that there would be only one session factory for one database

laravel multiple databases with multiple migration tables

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问题 I am trying to set up a multiple database application in laravel 5. I have a database A and a second database B. In database A there are my main models. Now I tried to write a migration file that creates a new table in database B. This works, because I can set the connection to database B in the schema builder like this: Schema::connection('foo')->create('users', function (Blueprint $table) { $table->increments('id'); }); But the problem here is, that the migrations table is still in database

Grails - Multiple Datasources

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问题 First, let me start that I have looked so many sites about the "correct" way to configure multiple datasource on Grails, every one of them (with Grails 2.0 and later) pointing to the docs , however after doing what the docs says I get this error: Error 2014-03-29 15:48:29,219 [localhost-startStop-1] ERROR context.GrailsContextLoader - Error initializing the application: Error creating bean with name 'transactionManager_lookup': Cannot resolve reference to bean 'sessionFactory_lookup' while

How to identify a particular entity's Session Factory with Fluent NHibernate and Multiple Databases

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问题 Question follows on from Fluent NHibernate + multiple databases (no need to follow this link,there should be enough background here). My problem is this: I'm using Fluent NHibernate. My application uses multiple databases. Each database has its own entities registered (mapped) against it. The result is that have multiple Session Factories, each one relating to a single DB, and each 'containing' its own set of mapped entities. For loading entities I've created a generic Factory class that

ASP.net Connecting to two databases at once?

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问题 Is connecting to two SQL databases at the same time possible ? I mean from one database I am reading records and comparing them with some data like email address and based on the decision that whether that email address exists in the database or not I am storing a new record in another database. Is this kind of double operation possible ? I am connecting with databases using SqlConnection and SqlCommand statements of C#.net Thank you. 回答1: Yes this is possible. You can either return a value