Wow, wouldn't this syntax be nice in PHP? :-) 

Unfortunately this is like saying `if (true == true)`

`('morphToMany' || 'morphedByMany')` is treated as an expression where the strings are converted to booleans (true). Since the expression is now comparing to a boolean, the left side is string also converted to true (a populated string).

We need instead
```
if (in_array($this->relationType, ['morphToMany', ....])) 
```

Will fix :-)