codeigniter4 / CodeIgniter4 / 3846

74%

develop: 84%

Pull #1622

travis-ci

Nullable support for __set.

I wrote it and works like a charm. Slightly more efficient, because I  some of  array_key_exists don't exist anymore ;). 
But... I noticed an issue when I am trying to save this entity. Property which is set to null is excluded from INSERT what should cause problem if default column value is not set to null but different value - in that case we cannot save null during insert.

In my case should be:
```
INSERT INTO `t_table_search` (`dcs_identifier`, `dcs_conditions`, `dcs_dsc_id`) VALUES ('e77d630b7be1484cb4b7b4f8dbc15c45', '{\"v-school\":[\"1\"],\"v-center\":[\"44\"]}', NULL) // dcs_dsc_id = null;
```
it is:
```
INSERT INTO `t_table_search` (`dcs_identifier`, `dcs_conditions`) VALUES ('e77d630b7be1484cb4b7b4f8dbc15c45', '{\"v-school\":[\"1\"],\"v-center\":[\"44\"]}')// no null for dcs_dsc_id
```

 I think it is because of entity value of property in _original is the same as actual value of property (i.e.: dcs_dsc_id == null)


```object(App\Entities\entityname)#40 (7) {
  ["dcs_identifier":protected]=>
  string(32) "e77d630b7be1484cb4b7b4f8dbc15c45"
  ["dcs_conditions":protected]=>
  string(52) "{"driving-school":["1"],"examination-center":["44"]}"
  ["dcs_dsc_id":protected]=>
  NULL
  ["dcs_updated_at":protected]=>
  NULL
  ["_options":protected]=>
  array(3) {
    ["casts"]=>
    array(3) {
      ["dcs_identifier"]=>
      string(6) "string"
      ["dcs_conditions"]=>
      string(10) "json-array"
      ["dcs_dsc_id"]=>
      string(11) "?json-array"
    }
    ["dates"]=>
    array(2) {
      [0]=>
      NULL
      [1]=>
      string(14) "dcs_updated_at"
    }
    ["datamap"]=>
    array(0) {
    }
  }
  ["_original":protected]=>
  array(4) {
    ["dcs_identifier"]=>
    NULL
    ["dcs_conditions"]=>
    NULL
    ["dcs_dsc_id"]=>
    NULL
    ["dcs_updated_at"]=>
    NULL
  }
  ["_cast":"CodeIgniter\Entity":private]=>
  bool(true)```


I saw PR month or two ag... (continued)

10 of 10 new or added lines in 1 file covered. (100.0%)

8942 of 12243 relevant lines covered (73.04%)

422.97 hits per line