I have two databases and want to select one database at the time of login.
I have userid: user1 in both databases and I have userid, password and database dropdown option to select database in login form, how I can achive this, by this way or some other way?
In database.php
class DATABASE_CONFIG {
public $default = array(
'datasource' => 'Database/Mysql',
'persistent' => false,
'host' => 'localhost',
'login' => 'root',
'password' => '',
'database' => 'abc',
'prefix' => '',
//'encoding' => 'utf8',
);
public $second = array(
'datasource' => 'Database/Mysql',
'persistent' => false,
'host' => 'localhost',
'login' => 'root',
'password' => '',
'database' => 'xyz',
'prefix' => '',
//'encoding' => 'utf8',
);
You can override the Model constructor setting the datasource as you need.
Like this
class AppModel extends Model
{
public function __construct($id = false, $table = null, $ds = null)
{
parent::__construct($id, $table, $connection_name);
$this->useDbConfig = $connection_name;
}
}
Ask me if you need more information
Related
iam using multiple databases for my yii2 project.In my config file, I have the configuration like
'db' => [
'class' => 'yii\db\Connection',
'dsn' => 'mysql:host=localhost;dbname=db',
'username' => 'root',
'password' => '',
'charset' => 'utf8',
'tablePrefix' => 'tbl_',
],
'db2' => [
'class' => 'yii\db\Connection',
'dsn' => 'mysql:host=localhost;dbname=db2',
'username' => 'root',
'password' => '',
'charset' => 'utf8',
'tablePrefix' => 'tbl_',
],
And i have a query like
$query = (new \yii\db\Query())
->select(['A.id', 'A.category_english', 'COUNT(B.category_id)'])
->from(['A' => 'tbl_categories', 'B' => $filteredData])
->where('A.id = B.category_id')
->groupBy(['A.id', 'A.category_english'])
->orderBy(['COUNT(B.category_id)'=>SORT_DESC]);
$data = $query->all();
The above query is fetching details from the first DB. How can I change that to the second? Where I can set the db name in query builder.
on a module I have add a component named db where i put, like the main Yii component, the data for database connection, I need in my module use everytime the db specified in his configuration for all models and not the main database connection, how I can do this?
You have several way eg. using a separated configuration in app/config/main.php
eg adding a specific dbMyMod to component config
return [
// ...
'components' => [
// ...
'db' => [
'class' => 'yii\db\Connection',
'dsn' => 'mysql:host=localhost;dbname=example',
'username' => 'root',
'password' => '',
'charset' => 'utf8',
],
'dbMyMod ' => [
'class' => 'yii\db\Connection',
'dsn' => 'mysql:host=hostForMudle;dbname=module_db_name',
'username' => 'user_module_name',
'password' => 'password',
'charset' => 'utf8',
],
],
or one way that not require a static configuration in app/confing
could be based on a module function that return a proper db connection
public function myModuleDbCon()
{
$myDbCon = new yii\db\Connection([
'dsn' => 'mysql:host=localhost;dbname=example',
'username' => 'root',
'password' => '',
'charset' => 'utf8',
]);
return myDbConn;
}
then in you module you can retrive the module db connection
aDbConn = Yii::$app->getModule('my_module_name')->myModuleClass->myModuleDbCon();
.
$command = $aDbConn->createCommand('SELECT * FROM myTable');
$result= $command->queryAll();
I have a Model for DB tables, basically is one table but in different databases,
How can I set a connection to DB in Model?
protected $connection = 'ls';
Above code is not that I am looking for, I need to pass host, port, username and password. because conection are stored in DB not in config file.
I was thinking for function __construct() and call like Model($data)::where()..etc
Or I am thinking wrong way, can somebody give me an better idea.?
You can connect from Eloquent model by maintaining following aspects
First you can define multiple connection in database.php file
<?php
return array(
'default' => 'mysql',
'connections' => array(
# Our primary database connection
'mysql' => array(
'driver' => 'mysql',
'host' => 'host1',
'database' => 'database1',
'username' => 'user1',
'password' => 'pass1'
'charset' => 'utf8',
'collation' => 'utf8_unicode_ci',
'prefix' => '',
),
# Our secondary database connection
'mysql2' => array(
'driver' => 'mysql',
'host' => 'host2',
'database' => 'database2',
'username' => 'user2',
'password' => 'pass2'
'charset' => 'utf8',
'collation' => 'utf8_unicode_ci',
'prefix' => '',
),
),
);
You have your default connection still set to mysql . This means that, unless we specify otherwise, the application will use that mysql connection.
Now in your model you can specify which connection to use
<?php
class SomeModel extends Eloquent {
protected $connection = 'mysql2';
}
You can also define the connection at runtime via the setConnection method.
<?php
class SomeController extends BaseController {
public function someMethod()
{
$someModel = new SomeModel;
$someModel->setConnection('mysql2');
$something = $someModel->find(1);
return $something;
}
}
Currently I am using dynamic database switching in Cakephp from the database config file. I am switching based on the subdomain ie: TEST.mysite.com and PROD.mysite.com.
How and where is the best place to test and redirect if there is a database connection?
Thanks,
kSeudo
The quick and dirty way to do this is to put a condition in the constructor. I say dirty because it creates a conditional config and with the introduction of a bug could leave your production app connected to a dev database.
class DATABASE_CONFIG {
public $default = array(
'driver' => 'mysql',
'persistent' => false,
'host' => '',
'login' => '',
'password' => '',
'database' => '',
'prefix' => '',
'encoding' => 'utf8'
);
public $testDB = array(
'driver' => 'mysql',
'persistent' => false,
'host' => '',
'login' => '',
'password' => '',
'database' => '',
'prefix' => '',
'encoding' => 'utf8'
);
public function __construct()
{
if (false !== stripos($_SERVER['HTTP_HOST'], 'test'))
{ // Use the test DB since 'test' is present in the server host
$this->default = $testDB;
}
}
}
To test connection you could put the following in the contructor for app_model.php
public function __construct()
{
parent::__construct();
$db =& ConnectionManager::getDataSource('default');
if (empty($db->connection))
{
echo 'oh noes we werent able to connect';
exit;
}
}
I'm having trouble creating a page, which requires two different databases..
The controller is automaticly set to 'DB2', which is also specified in the database config file.
When i add a var $uses = array ('groups') to the controller, which is from the other DB (DB1), i get the data from only DB2 and all requests to DB1 become a invalid query..
u guys know a solution?
Thanks in advance!
Regards,
Swen
If have multiple datasources defined in your config/database.php file, you should be able to tell your Group model to use the second (non-default) config:
public $useDbConfig = 'db2';
Your config/database.php file should looks something like this:
class DATABASE_CONFIG {
var $default = array(
'driver' => 'mysql',
'persistent' => false,
'host' => 'your_host',
'login' => 'your_login_1',
'password' => 'your_password_1',
'database' => 'DB1',
'prefix' => ''
);
var $db2 = array(
'driver' => 'mysql',
'persistent' => false,
'host' => 'your_host',
'login' => 'your_login_2',
'password' => 'your_password_2',
'database' => 'DB2',
'prefix' => ''
);
}