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A collection of questions I see often in #symfony.

Most seem to relate to symfony 1.4 and Doctrine.

Q: How do I get the name of a related model object to show up instead of the id in a dropdown?

A: create a toString method in lib/model/doctrine/ModelName.class.php ( or lib/model/ModelName.class.php for Propel )

public function __toString()
  return $this->getName();

Q: What is the difference between ModelName?.class.php and ModelNameTable?.class.php (Doctrine)

A: ModelName?.class.php is for operating on a single instance or record of that type, whereas ModelNameTable?.class.php is for operating on the entire related table. For example:

// $onePerson is an instance of the Person class, retrieved with the PersonTable class
$onePerson = PersonTable::getInstance()->findOneByName('Bob');

// Get a Doctrine Collection of some people records with the PersonTable class.
$people = PersonTable::getInstance()->findAll();

foreach($people as $person)
  // each $person is an instance of the plain Person class.

Q: How can I use multiple databases in symfony?

A: Doctrine:
A: Propel:

Q: How can I set a default form parameter in my form?

A: Create a new object for the form, set the parameter you want on it, and pass it to the form.

  $person = new Person();
  $this->form = new PersonForm($person);