correctly sort by numeric columns

app/Models/Row.php

@@ -2,6 +2,9 @@
 
 namespace App\Models;
 
+use App\Tables\Column;
+use Illuminate\Database\Eloquent\Builder;
+
 /**
  * Row in a data table
  *
@@ -25,6 +28,25 @@ class Row extends BaseModel
         $this->data->_id = $value;
     }
 
+    public function scopeSortByCol(Builder $query, Column $column, $dir="asc")
+    {
+        $q = "data->>'".$column->id."'";
+        if ($column->type == 'int' || $column->type == 'float') {
+            $q = "CAST($q AS INTEGER)";
+        }
+        else if ($column->type == 'float') {
+            $q = "CAST($q AS FLOAT)";
+        }
+
+        if ($dir == 'asc') {
+            $q .= ' ASC';
+        } else {
+            $q .= ' DESC';
+        }
+
+        return $query->orderByRaw($q);
+    }
+
     /**
      * Allocate a single Global Row ID, application-unique.
      *