73 lines
2.5 KiB
Plaintext
73 lines
2.5 KiB
Plaintext
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++++ One-To-One
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Binding One-To-One foreign key associations is done with {{Doctrine_Record::ownsOne()}} and {{Doctrine_Record::hasOne()}} methods. In the following example user owns one email and has one address. So the relationship between user and email is one-to-one composite. The relationship between user and address is one-to-one aggregate.
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The {{Email}} component here is mapped to {{User}} component's column {{email_id}} hence their relation is called LOCALKEY relation. On the other hand the {{Address}} component is mapped to {{User}} by it's {{user_id}} column hence the relation between {{User}} and {{Address}} is called FOREIGNKEY relation.
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<code type="php">
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class User extends Doctrine_Record {
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public function setUp() {
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$this->hasOne('Address','Address.user_id');
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$this->ownsOne('Email','User.email_id');
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$this->ownsMany('Phonenumber','Phonenumber.user_id');
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}
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public function setTableDefinition() {
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$this->hasColumn('name','string',50);
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$this->hasColumn('loginname','string',20);
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$this->hasColumn('password','string',16);
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// foreign key column for email ID
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$this->hasColumn('email_id','integer');
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}
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}
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class Email extends Doctrine_Record {
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public function setTableDefinition() {
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$this->hasColumn('address','string',150);
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}
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}
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class Address extends Doctrine_Record {
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public function setTableDefinition() {
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$this->hasColumn('street','string',50);
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$this->hasColumn('user_id','integer');
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}
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}
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</code>
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++++ One-to-Many, Many-to-One
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<code type="php">
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class User extends Doctrine_Record {
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public function setUp() {
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$this->ownsMany('Phonenumber','Phonenumber.user_id');
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}
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public function setTableDefinition() {
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$this->hasColumn('name','string',50);
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$this->hasColumn('loginname','string',20);
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$this->hasColumn('password','string',16);
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}
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}
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class Phonenumber extends Doctrine_Record {
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public function setTableDefinition() {
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$this->hasColumn('phonenumber','string',50);
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$this->hasColumn('user_id','integer');
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}
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}
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</code>
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++++ Tree structure
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<code type="php">
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class Task extends Doctrine_Record {
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public function setUp() {
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$this->hasOne('Task as Parent','Task.parent_id');
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$this->hasMany('Task as Subtask','Subtask.parent_id');
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}
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public function setTableDefinition() {
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$this->hasColumn('name','string',100);
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$this->hasColumn('parent_id','integer');
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}
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}
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</code>
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