Outputting values not equal to certain values in yii2 - yii

Question

I would like to output variables not equal to certain values but it returns an error of
Failed to prepare SQL: SELECT * FROM `tblsuunit` WHERE `unitid` != :qp0
There are two models the first model where am getting the array of ids
public function actionSunits($id){
$unitslocation = new Unitslocation();
$id2 = Unitslocation::find()->where(['officelocationid'=>$id])->all();
foreach( $id2 as $ids){
print_r($ids['unitid']."<br>");
}
}
This outputs the ids as
8
9
11
12
13
14
16
I would then like to take the id and compare another model(units model) and get the id values not similar to the above and output then
So i have added
$idall = Units::find()->where(['!=', 'unitid', $ids])->all();
So the whole controller action becomes
public function actionSunits($id){
$unitslocation = new Unitslocation();
$id2 = Unitslocation::find()->where(['officelocationid'=>$id])->all();
foreach( $id2 as $ids){
$idall = Units::find()->where(['!=', 'unitid', $ids])->all();
}
var_dump($idall);
}
This is the units model table:
If it were working it should return 7 and 10
What could be wrong..

Answer 1

You should fix your code and simply use a not in condition, e.g. :
// $uls will be an array of Unitslocation objects
$uls = Unitslocation::find()->where(['officelocationid'=>$id])->all();
// $uids will contain the unitids
$uids = \yii\helpers\ArrayHelper::getColumn($uls, 'unitid');
// then simply use a not in condition
$units = Units::find()->where(['not in', 'unitid', $uids])->all();
$idall = \yii\helpers\ArrayHelper::getColumn($units, 'unitid');
Read more about ActiveQuery::where() and ArrayHelper::getColumn().

Answer 2

Try with:
$idall = Units::find()->where(['not in','unitid',$ids])->all();
Info: https://github.com/yiisoft/yii2/blob/master/docs/guide/db-query-builder.md
operand 1 should be a column or DB expression. Operand 2 can be either
an array or a Query object.