Updating records in model - php

Question

I try update model in database.
I have request with naw values and value.
'old_log'- old value to find row in database.
public function UserChange2(Request $request){
dump($request);
$data=$request->all();
$log = $request->input('old_log');
dump($log);
$user=userModel::select(['fam','im','ot','phone','log','pass'])->where('log',$log)->first();
$temp=$request->input('fam');
$user->fam=$temp;
$temp=$request->input('im');
$user->im=$temp;
$temp=$request->input('ot');
$user->ot=$temp;
$temp=$request->input('phone');
$user->phone=$temp;
$temp=$request->input('log2');
$user->log=$temp;
$temp=$request->input('pass');
$user->pass=$temp;
dump($user);
$user->save;
}
But the records in the table are not updated.
Model:
class userModel extends Model
{
public $timestamps = false;
protected $fillable=['fam','im','ot','phone','log','pass','reg','token','date','position'];
}
Now:
dump($request);
$data=$request->all();
$log = $request->input('old_log');
dump($log);
$user=userModel::select(['fam','im','ot','phone','log','pass'])->where('log',$log)->first();
$user->fill($request->all())->save();
$user->save;
And error:
Column not found: 1054 Unknown column 'id' in 'where clause' (SQL: update user_models set fam = y, phone = gggg, pass = tttyyyyyyyy where id is null)

Answer 1

Your userModel extends Model, which is an Eloquent Model and by default expects that the related table has a primary key called id.
The error
Column not found: 1054 Unknown column 'id' in 'where clause'
indicates that the column id does not exist.
Check your table definition. Is this a table in a DB that was created outside your Laravel project?
If not, check your database migration whether the primary key id is defined. Read here about database migrations.
If there is already a primary key that you want to use instead of id, you can tell Eloquent:
protected $primaryKey = 'your_primary_key';
See here.

Answer 2

You likely don't have fillables completed in your Model.
Go to the model which should be blank and add the fields that can be completed:
example:
protected $fillable = [
'phone', 'log2', 'pass',
];
You can find this in the Laravel manual here:
https://laravel.com/docs/5.5/eloquent#mass-assignment

Answer 3

remove select from your eloquent. try this..
$user=userModel::where('log',$log)->first();
$user::create($request->all());
edit
$user=userModel::where('log',$log)->first();
$request->request->add(['log' => $request->log2]);
$user::create($request->all());