87 lines
2.7 KiB
PHP
87 lines
2.7 KiB
PHP
In the following example we have one database table called 'entity'. Users and groups are both entities and they share the same database table.
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The entity table has a column called 'type' which tells whether an entity is a group or a user. Then we decide that users are type 1 and groups type 2.
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The only thing we have to do is to create 3 records (the same as before) and add call the Doctrine_Table::setInheritanceMap() method inside the setUp() method.
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<code type='php'>
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class Entity extends Doctrine_Record {
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public function setTableDefinition() {
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$this->hasColumn('name','string',30);
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$this->hasColumn('username','string',20);
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$this->hasColumn('password','string',16);
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$this->hasColumn('created','integer',11);
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// this column is used for column
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// aggregation inheritance
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$this->hasColumn('type', 'integer', 11);
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}
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}
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class User extends Entity {
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public function setUp() {
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$this->setInheritanceMap(array('type'=>1));
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}
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}
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class Group extends Entity {
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public function setUp() {
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$this->setInheritanceMap(array('type'=>2));
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}
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}
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</code>
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If we want to be able to fetch a record from the Entity table and automatically get a User record if the Entity we fetched is a user we have to do set the subclasses option in the parent class. The adjusted example:
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<code type='php'>
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class Entity extends Doctrine_Record {
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public function setTableDefinition() {
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$this->hasColumn('name','string',30);
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$this->hasColumn('username','string',20);
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$this->hasColumn('password','string',16);
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$this->hasColumn('created','integer',11);
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// this column is used for column
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// aggregation inheritance
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$this->hasColumn('type', 'integer', 11);
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$this->option('subclasses', array('User', 'Group'));
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}
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}
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class User extends Entity {
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public function setUp() {
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$this->setInheritanceMap(array('type'=>1));
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}
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}
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class Group extends Entity {
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public function setUp() {
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$this->setInheritanceMap(array('type'=>2));
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}
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}
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</code>
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We can then do the following given the previous table mapping.
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<code type='php'>
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$user = new User();
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$user->name='Bjarte S. Karlsen';
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$user->username='meus';
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$user->password='rat';
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$user->save();
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$group = new Group();
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$group->name='Users';
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$group->username='users';
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$group->password='password';
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$group->save();
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$q = new Doctrine_Query();
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$user = $q->from('Entity')->where('id=?')->execute(array($user->id))->getFirst();
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$q = new Doctrine_Query();
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$group = $q->from('Entity')->where('id=?')->execute(array($group->id))->getFirst();
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</code>
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The user object is here an instance of User while the group object is an instance of Group.
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