ADOdb

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====== classBelongsTo ======
~~NOTOC~~
<WRAP right box>
==Syntax==
  void ADODB_Active_Record::classBelongsTo(
     string $childClass, 
     string $parentClass, 
     string $foreignKey, 
     optional string $parentPrimaryKey = 'id', 
     optional string $parentClass = 'ADODB_Active_Record'
     )
</WRAP>
===== Description =====
You can define the parent of the current object using ''ClassBelongsTo()''. In the example below, we have a child table kids, and a parent table person. We have a link kids.person_id = persons.id. We create a child first, then link it to the parent
===== Parameters =====
==== $childClass ====
The child table in the relationship
==== $parentClass ====
The parent table in the relationship
==== $foreignKey ====
If, due to database design constraints, the key field in the child table is not named the same as that of the parent table, specify it here.
==== $foreignClass ====
If the class name for the child table differs from that of the parent, for example there has been some extension of methods, specify it here
===== Usage =====
<code php>
class kid extends ADOdb_Active_Record{};
ADODB_Active_Record::ClassBelongsTo('kid','person','person_id','id');

$ch = new kid(); // default tablename will be 'kids', with primary key 'id'
$ch->Load('id=1');
$p = $ch->person;
if (!$p || $p->name_first != 'John') echo "Error loading belongsTo<br>";
else echo "OK loading BelongTo<br>";
</code>