using zend test dbadapter with zend db table abstract - unit-testing

Question

Has anyone been able to to use Zend_Test_DbAdapter with Zend_Db_Table_Abstract?
I'm trying to test a Model I created that extends Zend_Db_Table_Abstract and I get an exception regarding the primary key not being set if I use a Zend_Test_DbAdapter (other adapters like mysql or sqlite) work fine.
class Model_Category extends Zend_Db_Table_Abstract
{
protected $_name = 'categories';
protected $_dependentTables = array('Model_Video');
public function getMap()
{
$map = array();
$rows = $this->fetchAll();
foreach($rows as $row)
{
$map[$row->id] = $row->name;
}
return $map;
}
}
Snippet from a PHPUnit test class:
protected function setUp()
{
$adapter = new Zend_Test_DbAdapter();
$stmt = Zend_Test_DbStatement::createSelectStatement(array(
array('id' => 1, 'name' => 'pranks'),
array('id' => 2, 'name' => 'physical_feats'),
array('id' => 3, 'name' => 'art'),
array('id' => 4, 'name' => 'cute'),
array('id' => 5, 'name' => 'philanthropy')
));
$adapter->appendStatementToStack($stmt);
$this->fixture = new Model_Category($adapter);
}
Exceptions are thrown when exercising the Model's methods:
public function testGetMap()
{
$expected = array(
'1' => 'pranks',
'2' => 'physical_feats',
'3' => 'art',
'4' => 'cute',
'5' => 'philanthropy'
);
$actual = $this->fixture->getMap();
$this->assertEquals($expected, $actual);
}
Results in:
Model_CategoryTest::testGetMap()
Zend_Db_Table_Exception: A table must have a primary key, but none was found
ZendFramework-1.10.6/library/Zend/Db/Table/Abstract.php:876
ZendFramework-1.10.6/library/Zend/Db/Table/Abstract.php:969
ZendFramework-1.10.6/library/Zend/Db/Table/Select.php:100
ZendFramework-1.10.6/library/Zend/Db/Table/Select.php:78
ZendFramework-1.10.6/library/Zend/Db/Table/Abstract.php:1005
ZendFramework-1.10.6/library/Zend/Db/Table/Abstract.php:1303
application/models/Category.php:35
tests/unit/application/models/CategoryTest.php:90
Forcing a primary key does not work either:
protected function setUp()
{
$adapter = new Zend_Test_DbAdapter();
$stmt = Zend_Test_DbStatement::createSelectStatement(array(
array('id' => 1, 'name' => 'pranks'),
array('id' => 2, 'name' => 'physical_feats'),
array('id' => 3, 'name' => 'art'),
array('id' => 4, 'name' => 'cute'),
array('id' => 5, 'name' => 'philanthropy')
));
$adapter->appendStatementToStack($stmt);
$this->fixture = new Model_Category(array(
'db' => $adapter,
'primary' => 'id'
));
}
Executing the same unit test, from above results in:
Model_CategoryTest::testGetMap()
Zend_Db_Table_Exception: Primary key column(s) (id) are not columns in this table ()
ZendFramework-1.10.6/library/Zend/Db/Table/Abstract.php:888
ZendFramework-1.10.6/library/Zend/Db/Table/Abstract.php:969
ZendFramework-1.10.6/library/Zend/Db/Table/Select.php:100
ZendFramework-1.10.6/library/Zend/Db/Table/Select.php:78
ZendFramework-1.10.6/library/Zend/Db/Table/Abstract.php:1005
ZendFramework-1.10.6/library/Zend/Db/Table/Abstract.php:1303
application/models/Category.php:35
tests/unit/application/models/CategoryTest.php:93

Answer 1

You can define the primary key by doing the following on your Zend_Test_DbAdapter instance:
$adapter = new Zend_Test_DbAdapter();
$adapter->setDescribeTable('table_name', array('column_name' =>
array(
'SCHEMA_NAME' => 'schema_name',
'TABLE_NAME' => 'table_name'
'COLUMN_NAME' => 'column_name',
'PRIMARY' => true
)
));
And then transposing table_name, column_name and schema_name with the values from your implementation. You would need to do this for every table you are interacting with in the class under test.

Answer 2

The reason you are getting the exception Zend_Db_Table_Exception: A table must have a primary key, but none was found is because all tables that use Zend_Db_Table must have a primary key defined. When you go to use the table, since a primary key was not defined in your DbTable class, Zend_Db attempts to determine the table's primary key by examining the table's properties from the information schema. It sees your table doesn't have a primary key and fails.
From the manual:
If you don't specify the primary key, Zend_Db_Table_Abstract tries to
discover the primary key based on the information provided by the
describeTable() method.
Note: Every table class must know which columns can be used to address
rows uniquely. If no primary key columns are specified in the table
class definition or the table constructor arguments, or discovered in
the table metadata provided by **describeTable(), then the table cannot
be used with Zend_Db_Table.
Trying to force the primary key isn't working because it looks like your table doesn't have a column called id which you are specifying as the primary key.
The solution would be to add a primary key to the table you are trying to use.
In your model class that extends Zend_Db_Table_Abstract you can specify a primary key that isn't ID using protected $_primary = 'primary_column';