Laravel Eloquent where field is X or null

Question

I have a table like this:

table
- field1: tinyint
- field2: varchar (nullable)
- datefield: timestamp (nullable)

Now I want to get all entries

Answer 1

Using coalesce() converts null to 0:

$query = Model::where('field1', 1)
    ->whereNull('field2')
    ->where(DB::raw('COALESCE(datefield_at,0)'), '<', $date)
;