Override the condition from ActiveQuery->init() - yii

Question

On Yii2 i have this code in ProjectQuery
class ProjectQuery extends \yii\db\ActiveQuery
{
public function init()
{
$this->andOnCondition(['deleted' => 0]);
parent::init();
}
Obviously the deleted condition must always apply, but there could be cases where this isn't true (for example an option for the user to see his deleted projects). How can i override this condition? Do i have to use something different from init() ?
(note, i want to apply this condition to all kind of queries normally, that's why i used init() on ProjectQuery and not the ProjectSearch class)

Answer 1

You can still use init() but to override the 0 you should bind a parameter.
public function init()
{
$this->andOnCondition('deleted = :deleted', [':deleted' => 0]);
parent::init();
}
So to create a query that only shows the deleted projects write something like this:
$query = Project::find()->addParams([':deleted' => 1]);
To show all projects, deleted and not deleted, you could add a function to the ProjectQuery object to modify it accordingly.
public function includeDeleted() {
$this->orOnCondition(['deleted' => 1]);
return $this;
}
And then write your query like:
$query = Project::find()->includeDeleted();

Answer 2

You can use onCondition() to override existing on conditions:
public function init() {
$this->andOnCondition('deleted = :deleted', [':deleted' => 0]);
parent::init();
}
public function includeDeleted() {
$this->onCondition(null);
// remove unused param from old ON condition
unset($this->params[':deleted']);
return $this;
}
You can use where() in the same way if you want to override conditions added by where(), andWhere and orWhere().

Answer 3

Assuming that you have a class Project where you have overwritten the find() method to return a ProjectQuery instance, the following might be another option. I also assume that you regularely query for undeleted items, and not so often but explicitly for all/deleted items.
Another option could be to add another method to the Project class and remove the default initialization in the ProjectQuery class.
class ProjectQuery extends \yii\db\ActiveQuery
{
public function init()
{
parent::init();
}
...
}
And:
class Project extends \yii\db\ActiveRecord {
...
public static function find()
{
return (new ProjectQuery(get_called_class()))
->andOnCondition(['deleted' => 0]);
}
public static function findAllProjects() // or find any better name for this
{
return new ProjectQuery(get_called_class());
}
}
Now, whenever you want to query explicitly all projects you would need to use this extra method Project::findAllProjects(). So in normal circumstances you won't have to remember that you have to modify the query in some way. No danger, that this could be forgotten.
It is still not 100% satisfying, since one could use find() and add ->andOnCondition(['deleted' => 1]) which would mean no records can be found. However, regarding security this is not so critical and the problem is found easily, I guess.