Wiki articles in category Tips

You may face a situation when you need to access to a configurable module's property from everywhere and you don't have an instance of this module's class.

In Yii1 I used to have my own components under the components folder of the structure, now with namespacing this is a little bit different.

Ok, you have installed a Yii 2 basic or advanced app for the first time and completed the post install steps. You have picked up a few extensions to install for the first time as well. You would already see a composer.lock file in your application root folder.

The tips here are for advanced usages of composer and its assumed you have read about using composer and have a knowledge of your vendor packages to be updated. Let's consider, you want to update only one specific yii2 vendor library, without updating all the other extension packages?

There are several ways to speedup slow unit tests which interact with database:

There are cases that you want to make an ajax request to another server and get the results.

The yii2-field-range extension enables you to easily setup ActiveField range fields with Bootstrap styling. You basically can setup two attributes joined together like a single field with combined validation error block.

The article Fixing extensions without modifying their code reminded me of another patching technique that I used. My conviction and a hard look on the web had led me to an article [Redefine PHP class methods or class](http://stackoverflow.com/questions/137006/ph...

MultiActiveRecord is an extension that add support for multiple database connection for your application.

当我们使用Yii数据库去保存Session时，只要简单的配置就可以完成这个功能，在进行性能优化这个主题之前，我们先来查看一下CHttpSession和CDBHttpSession源代码，探讨CHttpSession和CDBHttpSession的流程再进行深一步优化主题。

上一篇 关于 Yii CHttpSession性能优化篇之源码流程分析 有详细分析CHttpSession执行流程，在了解CHttpSession的详细执行流程之后，我们就可以非常轻松的扩展Yii Session，来优化和符合自己的业务流程。

Changing the way a CGridView is rendered from the configuration file, or through behaviors specified at the moment it is used, is handy to extend a CGridView without creating tons of different classes for it. I am surprised that this is not in the default implementation, so I made my default CGridView implementation.

Efficient coding with Yii implies efficient use of the code generator. This article shares the personalised Gii templates that were built starting from the standard templates proposed by AweGen.

in model add the following code:

CFormatter is one of Yii's core components and used to format values displayed in widgets like CGridView or CDetailView. All classic formats like numbers, text, urls or datetime are supported but you may have to use a formatting rule that isn't built in. Let's say we want to display arrays of strings (like tags associated with a product model)...

The usual way to find out what Yii has created for an SQL query is to mutilate the SQL in the sourcecode and call the program again so that the SQL statement with errors is displayed. Or you can use the SQL logger, which must be switched on and off each time and logs all SQL statements, which leads to an enormous slowdown in program execution and decelerates your workflow.

When you're filling up a form of a CActiveRecord (using CActiveForm for example), usually you'll construct your code so that in case of validation error you'll get back the form with the error displayed back to you, typically when CActiveForm.errorSummary() is used. This is how its done by Gii.

this is my way for embed js code block in view file:

We are running one frontend running NGINX and several app servers running Apache2. There are several issues we have come across but right now I'll be documenting one of them. I'll be completing this article when I get more time.

Sometimes writing views like