#370: A small fix of a bug if the primary keys are ambiguous

application/models/Grocery_crud_model.php

@@ -177,19 +177,21 @@ function limit($value, $offset = '')
 
     function get_total_results()
     {
+        // A fast way to calculate the total results
+        $key = $this->get_primary_key();
+
     	//set_relation_n_n special queries. We prefer sub queries from a simple join for the relation_n_n as it is faster and more stable on big tables.
     	if(!empty($this->relation_n_n))
     	{
-    		$select = "{$this->table_name}.*";
+    		$select = "{$this->table_name}." . $key;
     		$select = $this->relation_n_n_queries($select);
 
     		$this->db->select($select,false);
-    	}
-
-	// A fast way to calculate the total results
-    	$key = $this->get_primary_key();
-	$this->db->select($key);
-	return $this->db->get($this->table_name)->num_rows();
+    	} else {
+            $this->db->select($this->table_name . '.' . $key);
+        }
+
+        return $this->db->get($this->table_name)->num_rows();
     }
 
     function set_basic_table($table_name = null)