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Example code of akawalko/zfext

Informations about the package zfext

ZFExt

ZFExt is a library extending components of the Zend Framework 1.12. I have several projects build on top of ZF1, so I decided to share my tips and tricks with you.

ZFExt_Db_Table

This class is derived from Zend_Db_Table. It provide clean, almost transparent cache layer.

Usage

First we have to create class that inherits from ZFExt_Db_Table. Here we declare two standard methods, get() & getAll(), which will fetch record from database table called users by ID and fetch all records respectively. By passing argument called $useCache we can control when retrieve data from the database and when from the buffer.

Now we can initialize our class and fetch some data form database.

Using $userModel->getAll () fetch all active users and saves the results in buffer under the identifier:

Available methods

Brief description of the methods

setCache() Sets or overrides the cache object. Method is used internally by the constructor, if we passed an associative array with the index named cache as in the example above.

getCache() Returns the cache object.

setOptions() Sets or overrides options. Method is used internally by the constructor, if we passed an associative array.

createCacheId() Generate descriptive cache ID based on two arguments. Method is used internally by methods loadOne() & loadAll(). $methodName is pretty self-explanatory. It is also mandatory. Second argument called $methodArguments is an array of values that will be used during the execution of the query.

removeByPartialId() Removes cache entry by partial ID. It's useful to remove entries from specific model class without removing all entries.

loadOne() & loadAll() are only the proxy methods, providing an intuitive API (first 3 arguments are the same as in the methods fetchRow () & fetchAll () in class Zend_Db_Adapter. They internally use method _loadFromCacheIfPossible().

Let's look at the argment list. $sql may be raw SQL query or Zend_Db_Select object. $bind is an array of values that will be used during the execution of the query. It is best when the parameters are named, because it will be used to generate descriptive cache ID. For the same reason, the last argument, $calleeMethodName is the name of the function that uses the loadOne () / loadAll () to fech data. $fetchMode controls the way in which the Zend_Db returns query results. Specify the fetch mode using Zend_Db class constants FETCH_ASSOC, FETCH_NUM, FETCH_BOTH, FETCH_COLUMN, and FETCH_OBJ. To learn more, see the online documentation for Zend, chapter Zend_Db_Statement. $useCache is boolean flag that control when retrieve data from the database and when from the buffer.

_loadFromCacheIfPossible() Used internally by methods loadOne() & loadAll(). It takes two arguments. $fetchMethod is a string which may take 2 values: fetchRow, fetchAll respectively. They are the names of methods from class Zend_Db_Adapter that will be used to retrieve data from database (in case no data found in buffer). $args is an array containing all arguments passed to methods loadOne() & loadAll().

All versions of zfext with dependencies

PHP Build Version
Package Version
Requires php Version >=5.3.0
zf1/zend-db Version 1.12.6
zf1/zend-cache Version 1.12.6
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