Change flight_number field to uint

app/Database/migrations/2017_06_17_214650_create_flight_tables.php

@@ -16,7 +16,7 @@ class CreateFlightTables extends Migration
         Schema::create('flights', function (Blueprint $table) {
             $table->string('id', \App\Interfaces\Model::ID_MAX_LENGTH);
             $table->unsignedInteger('airline_id');
-            $table->string('flight_number', 10);
+            $table->unsignedInteger('flight_number');
             $table->string('route_code', 5)->nullable();
             $table->string('route_leg', 5)->nullable();
             $table->string('dpt_airport_id', 5);

app/Services/ImportService.php

@@ -102,6 +102,11 @@ class ImportService extends Service
                 continue;
             }
 
+            // turn it into a collection and run some filtering
+            $row = collect($row)->map(function ($val, $index) {
+                return trim($val);
+            })->toArray();
+
             $importer->import($row, $offset);
         }