70 lines
2.5 KiB
PHP
70 lines
2.5 KiB
PHP
<?php ?>
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Doctrine supports sequences for generating record identifiers. Sequences are a way of offering unique IDs for data rows. If you do most of your work with e.g. MySQL, think of sequences as another way of doing AUTO_INCREMENT.
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<br \><br \>
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Doctrine knows how to do sequence generation in the background so you don't have to worry about calling database specific queries - Doctrine does it for you, all you need to do
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is define a column as a sequence column and optionally provide the name of the sequence table and the id column name of the sequence table.
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<br \><br \>
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Consider the following record definition:
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<br \><br \>
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<?php
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renderCode("<?php
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class Book extends Doctrine_Record {
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public function setTableDefinition()
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{
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\$this->hasColumn('id', 'integer', null, array('primary', 'sequence'));
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\$this->hasColumn('name', 'string');
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}
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}
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?>");
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?>
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<br \><br \>
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By default Doctrine uses the following format for sequence tables [tablename]_seq. If you wish to change this you can use the following
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piece of code to change the formatting:
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<br \><br \>
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<?php
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renderCode("<?php
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\$manager = Doctrine_Manager::getInstance();
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\$manager->setAttribute(Doctrine::ATTR_SEQNAME_FORMAT,
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'%s_my_seq');
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?>");
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?>
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<br \><br \>
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Doctrine uses column named id as the sequence generator column of the sequence table. If you wish to change this globally (for all connections and all tables)
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you can use the following code:
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<br \><br \>
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<?php
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renderCode("<?php
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\$manager = Doctrine_Manager::getInstance();
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\$manager->setAttribute(Doctrine::ATTR_SEQCOL_NAME,
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'my_seq_column');
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?>");
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?>
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<br \><br \>
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In the following example we do not wish to change global configuration we just want to make the id column to use sequence table called
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book_sequence. It can be done as follows: <br \><br \>
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<?php
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renderCode("<?php
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class Book extends Doctrine_Record {
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public function setTableDefinition()
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{
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\$this->hasColumn('id', 'integer', null, array('primary', 'sequence' => 'book_sequence'));
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\$this->hasColumn('name', 'string');
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}
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}
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?>");
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?>
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<br \><br \>
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Here we take the preceding example a little further: we want to have a custom sequence column. Here it goes:<br \><br \>
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<?php
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renderCode("<?php
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class Book extends Doctrine_Record {
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public function setTableDefinition()
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{
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\$this->hasColumn('id', 'integer', null, array('primary', 'sequence' => array('book_sequence', 'sequence')));
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\$this->hasColumn('name', 'string');
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}
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}
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?>");
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?>
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