Laravel mass update with different value based on condition - laravel

Question

I have a table structure like:
id //primary_key
value
changed_value //on update value column should not be updated instead changed value should be updated
status // 0 - default, 1- updated
am_id //foreign_key
Now, to mass update I am doing as follows:
Model::where('am_id',$request->am_id)
->where('value',$request->value)
->update([
'changed_value' => '$request->value',
'status' => 1
]);
However, we should not set status as 1 blindly, as there is one condition. It's if the value of value column is equal to the $request->value the status should be 0 instead.
How this scenario could appear?
Initially, after inserting the first row looks like
+-----+-------+---------------+--------+-------+
| id | value | changed_value | status | am_id |
+-----+-------+---------------+--------+-------+
| 1 | 20 | null | 0 | 1 |
+-----+-------+---------------+--------+-------+
After 1st update
+-----+-------+---------------+--------+-------+
| id | value | changed_value | status | am_id |
+-----+-------+---------------+--------+-------+
| 1 | 20 | 40 | 1 | 1 | // changed_value - 40 , status 1
+-----+-------+---------------+--------+-------+
After 2nd Update (let's say the value is updated to 20), in this case as the value === changed_value the status should be updated as 0 not 1
+-----+-------+---------------+--------+-------+
| id | value | changed_value | status | am_id |
+-----+-------+---------------+--------+-------+
| 1 | 20 | 20 | 0 | 1 | // changed_value - 20 , status 0
+-----+-------+---------------+--------+-------+
This means, during the model update in below-mentioned code. I want to insert a condition, if( value == $request->value) status = 0 else status = 1
Model::where('am_id',$request->am_id)
->where('value',$request->value)
->update([
'changed_value' => '$request->value',
'status' => 1
]);

Answer 1

Alternatively you could always use raw sql if performance was an issue.
DB::unprepared('
update model
set status = case when (changed_value = "'.$request->value.'") then 0 else 1 end
and changed_value = "'.$request->value.'"
where value = "'.$request->value.'";
')
Edit: You can do it in Eloquent with 2 queries with a subquery to filter the ids of the already updated rows.
// get ids of all matching status 1 but don't execute the query
$matches = Model::select('id')->where('am_id',$request->am_id)->where('value',$request->value)
->where('changed_value', $request->value);
// change matching status 1
Model::whereIn('id', $matches)
->update([
'changed_value' => '$request->value',
'status' => 1
]);
// matching not in status 1
Model::where('am_id',$request->am_id)
->where('value',$request->value)
->where('changed_value', '!=', $request->value)
->whereNotIn('id', $matches)
->update([
'changed_value' => '$request->value',
'status' => 0
]);

Answer 2

Try this one.
$value = Model::where('am_id',$request->am_id)->first()->value;
if($request->value == $value){
$status = 1;
}else{
$status = 0;
}
Model::where('am_id',$request->am_id)
->update([
'changed_value' => '$request->value',
'status' => $status
]);

Answer 3

Unfortunately, Eloquent was not designed to handle this kind of mass update (where you want different conditions) with a single query. You would have to step through the models, or resort to the query builder.
$models = Model::where('am_id',$request->am_id)->get();
$models->map(function ($model) use ($request) {
// status
$status = $model->value === $request->value ? 0 : 1;
// update model
$model->update([
'changed_value' => $request->value,
'status' => $status
]);
return $model;
});
EDIT: There are some query builder ideas on this page that might allow you to make something reusable, instead of just writing raw SQL any time you need to do this.
https://github.com/laravel/ideas/issues/575#issuecomment-300731748