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        Php Object Generator Tutorials
        1. Introduction to POG
        2. Setting up PHP, MySQL etc.
        3. Designing your objects
        4. Generating your code
        5. Description of the generated code
        6. Edit configuration file
        7. The Setup Process
        8. Using the code: Save()
        9. Using the code: Get()
        10. Using the code: SaveNew()
        11. Using the code: GetList()
        12. Using the code: Delete()
        13. Using the code: DeleteList()
        14. Advanced: object relations
        15. Advanced: Set{Parent}()
        16. Advanced: Get{Parent}()
        17. Advanced: Add{Child}()
        18. Advanced: Get{Child}List()
        19. Advanced: Save(deep)
        20. Advanced: Delete(deep)
        21. Advanced: Add{Sibling}()
        22. Advanced: Set{Child}List()
        23. Advanced: Set{Sibling}List()
        24. Advanced: Get{Sibling}List()
        25. Advanced: DeleteList(deep)
        26. Customizing POG-generated code
        27. Customizing: Extending POG Objects
        28. Customizing: Plugins
        29. Examples
        30. Examples: User registration system
        31. Examples: User authentication
        32. Examples: Survey form
        33. Examples: Using POG with AJAX
        34. PDO: Introduction
        35. PDO: SQLite example
        36. PDO: Firebird example
        37. PDO: PostgreSQL example
        38. PDO: MySQL example
        39. PDO: ODBC example
        40. Troubleshooting
        41. Troubleshooting: Data appears encoded
        42. Troubleshooting: Can't regenerate object
        43. Troubleshooting: Can't seem to Save()
        44. Troubleshooting: Can't get object / object attributes from database
        45. Troubleshooting: Can't open zip file on Mac
        46. Troubleshooting: Setup screen is blank
        47. Videos
        48. Appendix: Creating table(s) manually
        49. Appendix: Regenerating objects
        50. Appendix: Generating objects using SOAP
        51. Case Study: Gravity GTD
        52. Case Study: Web Form Factory


        Want more Php Object Generator?
        Back to the Code Generator
        The POG Weblog and RSS feed.
        The POG Google group


        Advanced: object relations


        In addition to the 6 essential CRUD methods, POG can also generate additional methods which facilitate object relations in PHP4 and PHP5.

        Object relations are used to define how your objects relate to one another. Even in the simplest web application, when 1 or more objects are used, they are almost always connected in the logical sense. If you have an ‘Blog Article’ object and a ‘Comment’ object, these can be related by the definition: A blog article has many comments or even This comment belongs to this blog article

        In the beginning, POG did not provide any out-of-the-box facilities for generating methods that would make object relations easy to program for. One had to manually add the reference attribute of 1 object within another object to establish the relations, much like when you define 2 database tables and connect them using a foreign key.

        We then added object relations functionality to POG to accelerate application development and it was very well received.

        POG can generate 3 types of connected objects:

        PARENT
        CHILD
        SIBLING

        Parent and Child objects are used if your objects have 1 to many or many to 1 relations. The blog and comment example used above is an excellent example of Parent and Child objects.

        Sibling objects are used if your objects have many to many relations with each other.

        When an object is identified as type ‘Parent’ or ‘Child’ or ‘Sibling’, POG generates the usual 6 CRUD methods as well as additional methods (referred to as relations methods) that accelerate application development even more. What follows is a description of the relations methods as well as code samples that demonstrate how they can be used.

        Please note that these additional methods are only generated if a developer specifies that an object
        is a Parent, Child or Sibling. Otherwise the object will be generated with only the usual 6 CRUD
        methods.

        To Specify that an object is a CHILD/PARENT/SIBLING of another, add the OBJECT NAME of target object as an attribute of the referring object and choose {CHILD} / {PARENT} /{SIBLING} from the drop down list. For example, to create an Author/Book parent-child relationship, do the following

        Then do not forget to establish the relation in the target object as well:

        Specifying relationship both ways is required for the objects to work properly. If the relations are not properly set up. you will get error messages when you run the POG Setup application.

        Some blog posts about PHP Object Relations:
        http://www.7795196.com/plog/article/136/many-many-relations
        http://www.7795196.com/plog/article/102/coming-soon-generate-parent-child-objects
        http://www.7795196.com/plog/article/118/php-object-relations-faq
        http://www.7795196.com/plog/article/117/php-object-relations





        POG documentation summary:


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