Merge pull request #24 from ukfast/allow_null_sort_order_to_be_changed

Remove quotes from function call

Author: Gman98ish

src/Sieve.php

@@ -81,12 +81,12 @@ public function apply($queryBuilder)
             }
 
             if ($this->getSort() == "$property:asc_nulls_last") {
-                $queryBuilder->orderByRaw("ISNULL(\"$column\") asc")
+                $queryBuilder->orderByRaw("ISNULL($column) asc")
                     ->orderBy($column, 'asc');
             }
 
             if ($this->getSort() == "$property:desc_nulls_first") {
-                $queryBuilder->orderByRaw("ISNULL(\"$column\") desc")
+                $queryBuilder->orderByRaw("ISNULL($column) desc")
                     ->orderBy($column, 'desc');
             }
         }

tests/SieveTest.php

@@ -93,7 +93,7 @@ public function applies_sieve_sorts_to_a_query_builder_asc_nulls_last()
         $seive->apply($builder);
 
         $this->assertEquals(
-            'select * from "pets" order by ISNULL("name") asc, "name" asc',
+            'select * from "pets" order by ISNULL(name) asc, "name" asc',
             $builder->toSql()
         );
     }
@@ -117,7 +117,7 @@ public function applies_sieve_sorts_to_a_query_builder_desc_nulls_first()
         $seive->apply($builder);
 
         $this->assertEquals(
-            'select * from "pets" order by ISNULL("name") desc, "name" desc',
+            'select * from "pets" order by ISNULL(name) desc, "name" desc',
             $builder->toSql()
         );
     }