Re: Is their something like $classname::$tablename ?

[André Pletschette <plean@xxxxxxx>]

I now solved my third problem as followed, I write the fields of a table 
into global Variables.

If anybody has a better (nicer) way of doing this, I would be pleased to 
know ;)

   /**
    * Returns the Fields of a class
    */
   static function getFields($classname) {
       $tablename = self::getTableName($classname);
       return $GLOBALS["fields_of_".$tablename];
   }
  
   /**
    * Saves the fields of a table in a global Array
    */
   static function setFields($tablename, $fields) {
       $GLOBALS["fields_of_".$tablename] = $fields;
   }

I just don't have a solution for my second problem: I don't want to 
supply $classname as Parameter when calling:

testTable::toHtml_table_heading($dbConnect, "testTable");


André


André Pletschette wrote:

> Thanks Jochem, I now solved the problem with your help, the following 
> way:
>
> In the parent-class I define:
>
> static function getTableName($classname) {
> if (defined("$classname::TABLE_NAME")) {
> return(constant("$classname::TABLE_NAME"));
> } else {
> throw new Exception("No TABLE_NAME for ".$classname." defined!");
> }
> }
>
> And in each child-class I define, the const TABLE_NAME.
>
> Now I have two more problems:
> - I have to pass the Classname as a parameter to all my static functions:
> for Example: echo testTable::toHtml_table_heading($dbConnect, 
> "testTable");
>
> - I need a similar thing for an Array $fields, which contains the 
> field descriptions of the class:
> static function toHtml_table_heading($dbConnect, $classname) {
> $result = "\n\t<tr>";
> if (!isset("$classname::$fields")) {
> $classname->intializeClass($dbConnect, $classname);
> }
> ...
>
> Thankyou,
> André
>
>
> Jochem Maas wrote:
>
> > André Pletschette wrote:
> >
> > > Hi,
> > >
> > > I've got one function getTableName() which returns the 
> > > Database-Table with the data of a class (see below).
> > >
> > > As you can see it always calls the static $tablename of the subclass 
> > > described by $this->classname.
> >
> >
> >
> > I solved this problem by doing the following:
> >
> > abstract class DBTable
> > {
> > // we can't define abstract consts.
> > // but this must be defined in your subclass
> > // const TABLE_NAME = 'xxxxx';
> >
> > // define this func in your subclasses
> > abstract function getTableName();
> > }
> >
> > class C1 extends DBTable
> > {
> > function getTableName()
> > {
> > return self::TABLE_NAME;
> > }
> > }
> >
> > it seems like a crap way of doing it but
> > its very flexible and easy to understand (it just doesn't
> > have that certain 'je ne c'est quoi') - none the less it
> > was born out of a need for major flexibility (for pretty
> > much similar reasons to you - namely generic data objects),
> > anyway it gives you many ways to skin the cat (get the tablename):
> >
> > <?
> >
> > $c = new C1;
> >
> > echo $c->getTableName();
> > echo C1::getTableName();
> > echo C1::TABLE_NAME;
> >
> > $a = 'C1';
> >
> > if (defined("$a::TABLE_NAME")) {
> > echo constant("$a::TABLE_NAME");
> > }
> >
> > if someone has a better way, bring it on :-) I'd love to be
> > able to improve my own code.
> >
> > You may also want to look at the possibility of using class names
> > that are always indentical to the table names - I tried that but
> > I didn't like it.
> >
> > > Thankyou,
> > > André
> > >
> > > Here the function:
> > >
> > > function getTableName() {
> > > if ($this->classname == "class1") {
> > > return class1::$tablename;
> > > } elseif ($this->classname == "class2") {
> > > return class2::$tablename;
> > > } elseif ($this->classname == "class3") {
> > > return class3::$tablename;
> > > }...
> > > ...
> > > }else {
> > > throw new Exception($this->classname." not found!");
> > > } }

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