Extending the Framework

Some Basic Rules

Exception Handling

1. All functions of libaries and models should fire an exception if something goes wrong. Do not return "false" or something similar to represent an error.
2. All database-queries should be executed via "dbquery($query)". This helper-function provides a pattern for database queries including a correct exception handling. Read more here: Helper: dbquery
3. If you want to use in your libraries some other CodeIgniter libraries you should call "enable_excpetion()" of the extended exceptions-class. This will modify the behaviour of "show_error()" so it will throw an exception. Read more here: Extended Core: Exceptions

Extended Core

• Exceptions:
  Here you can tell CodeIgniter to throw real exceptions.

Helper

• dbquery:
  Pattern for database queries.

Abstract Models

Abstract model classes are implemented as codeigniter-helper. There is no other way to use the codeigniter-loader without to be forced to instatiate a class.

Model

• Tree:
  Abstract class to build a model interacting with a table representing data in a hierachical structure.