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• ^ Jelix components

• jDao : relational object mapping
  • DAO file
  • Instantiation and use of a dao factory and record
  • Manipulating a result set
  • Declaring methods in the XML file
  • Adding PHP methods to the factory
  • Automatic events

Jelix 1.3.1

Chapter: jDao : relational object mapping

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jDAO is the Object Relational Mapping system of Jelix. It is to provide an easy way to create an object couple, record and factory, using the DAO pattern.

A record object represents a database record : its properties are mapped on the fields of one or more tables.

A factory object provides some methods allowing to create a record, to save it, to destroy it or to retrieve some sets of record objects.

A record and factory object couple is described in a XML file. jDAO then handles the generation of the corresponding PHP objects.

The XML file allows to avoid the tiresome writing of SQL requests, take care of SQL injections problems : the objects generated handle everything. The XML file can be generated by a development tool, like for example one of the scripts featured with Jelix.

• DAO file
• Instantiation and use of a dao factory and record
• Manipulating a result set
• Declaring methods in the XML file
• Adding PHP methods to the factory
• Automatic events