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boralyl

Class Variables not holding values.

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I tried to simplify it, but let me just post all of the major components of the code.

First the code used to envoke all of these classes:
[code]
<?php
$q = new Albums();
$q->Album_id->equals(3);
$q->debugLevel(2);
$q->find();
while($q->fetch())
{
echo $q->Album_id.'<br />';
}
?>
[/code]

The important part of the Albums class:
[code]
<?php
require_once("DataObject.php");
require_once("DataObjectColumn.php");

class Albums extends DataObject
{
var $Id = null;
var $Album_Name = null;

function Albums()
{
    $this->DataObject();
$this->clearObject();
}

function clearObject()
{
$this->Id = new DataObjectColumn($this, 'Id', false);
$this->Album_Name = new DataObjectColumn($this, 'Album_Name', true);
}
?>
[/code]

The DataObjectColumn class:
[code]
<?php
class DataObjectColumn
{
var $column = null;
var $requires_quote = null;
var $data_object = null;

function DataObjectColumn(&$dataobject, $column_name, $requires_quote)
{
    $this->data_object =& $dataobject;
$this->column = $column_name;
$this->requires_quote = $requires_quote;
}

function equals($value)
{
    $sql = $this->data_object->quoteID($this->column) .' = '. $this->data_object->quote($value);
$this->data_object->addWhere($sql);
}
}
?>
[/code]

And finally the declaration of vars, constructor and member functions used above I included in the DataObject class
[code]
<?php
require_once("DataLayer.php");

class DataObject extends DataLayer
{
var $result = null;
var $args = null;
var $sorts = null;
var $whereConditions = null;
var $selectDistinct = false;
var $debugLevel = 0;
var $test = 0;

function DataObject()
{
    $this->DataLayer();
$this->args = array();
$this->sorts = array();
unset($this->result);
}

                        function quote($data)
{
if(!is_object($data))
return '\'' . mysql_real_escape_string($data) . '\'';
else
return '\'' . mysql_real_escape_string($data->data_object) . '\'';
}

function quoteID( $field )
{
return "`$field`";
}

                        function addWhere($sql)
{
    if($this->whereConditions != null)
{
$this->whereConditions .= ' AND '.$sql;
}
else
{
$this->whereConditions = $sql;
}
}

                  function find()
{
                             echo $this->whereConditions;
?>
[/code]

Now when I echo that variable it is null.  Even though if you echo it in addWheres it has the value of 3.  The DataLayer class just opens up a link to the database.  Any ideas as to what I am doing wrong?

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Your code is good!  no error in syntax nor structure.

You might want to look at other code which accessed $whereContitions and the parent class DataLayer.

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This may help...

If instead of calling $albums->Album_id->equals(5); I call addWhere directly such as $albums->addWhere('Albumi_id = 5'); The $this->whereConditions holds it's value.  It's calling addWhere from equals in the DataObjectColumn class that it isn't working.  Yet when I check to see what kind of object it is for both addWhere and equals it is the same type of object..Albums.

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