Zend framework2 is another method for implementing multi-database configuration, zendframework2

Zend framework2 is another method for implementing multi-database configuration, zendframework2

Reprinted, please indicate the source and respect the original: http://blog.csdn.net/a4376292/article/details/41485611. thank you.

Compared with the first method I have used to implement multi-database configuration in zend framework2: http://blog.csdn.net/a437629292/article/details/43791455? I can use this method more easily!

Don't worry. Let me hear it.

1. Question: The first method (see the above connection) is to instantiate a database adapter for every model instantiation. Is this a waste of resources?

Therefore, I have been dissatisfied with this implementation method. I have been searching for how to make a request (no matter how many model calls are included), or even instantiate the database adapter only once after the project is started.

2. idea: pubilc/index. php is the only entry file, that is, all requests must go through the index. php, so there is a little inspiration, is it in index. instantiate a database adapter array in php,

Then, based on the configuration or parameters, select which database adapter to instantiate?

3. Practice: Now that you have this idea, please try it out:

Add the following code to index. php:

// Instantiate all database adapters $ configs = new Zend_Config_Ini (APPLICATION_PATH. '/configs/serverConfig. ini '); $ dbAdapters = array (); // $ configArray = array (); $ registry = Zend_Registry: getInstance (); foreach ($ configs as $ config) {$ databaseName = $ config-> db-> params-> dbname; $ configArray [$ databaseName] = $ config; $ registry-> set ('configarray', $ configArray ); // configure database $ db = Zend_Db: factory ($ config-> db); // instantiate a suitable database adapter $ db-> query ("set names utf8 "); $ dbAdapters [$ databaseName] = $ db; $ dbAdapters [$ databaseName] = Zend_Db: factory ($ config-> db-> adapter, $ config-> db-> params-> toArray (); if ($ config-> db-> params-> default) = 1) {Zend_Db_Table :: setdefaadapter adapter ($ db) ;}}$ registry-> set ('dbadapters ', $ dbAdapters );

In this way, all the configuration database nodes in serverConfig. ini are turned into database adapters and loaded into arrays. In the array, we can use them.

What I implement now is to set the default database Adapter. The code in serverConfig. ini is as follows:

[proManager]db.adapter = PDO_MYSQLdb.params.host = 127.0.0.1:3306db.params.username = rootdb.params.password = rootdb.params.dbname = proManagerdb.params.default = 0[proManager1]db.adapter = PDO_MYSQLdb.params.host = 127.0.0.1:3306db.params.username = rootdb.params.password = rootdb.params.dbname = proManager1db.params.default = 1

By setting the default parameter, you can easily change the database usage! OY...

International practice: Welcome!