1 | <?php |
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15 | class EntityReferenceConverter implements ConverterInterface |
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16 | { |
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17 | /** |
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18 | * @var EntityWrapper |
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19 | */ |
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20 | private $entityWrapper; |
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21 | |||
22 | /** |
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23 | * @var EntityTypeManagerInterface |
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24 | */ |
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25 | private $entityManager; |
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26 | |||
27 | /** |
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28 | * @param EntityWrapper $entityWrapper |
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29 | * @param EntityTypeManagerInterface $entityManager |
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30 | */ |
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31 | public function __construct(EntityWrapper $entityWrapper, |
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37 | |||
38 | /** |
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39 | * @param FieldItemInterface $value |
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40 | */ |
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41 | public function convert(FieldItemInterface $value) |
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48 | |||
49 | /** |
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50 | * Returns whether the FieldItemInterface can be converted or not. |
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51 | * |
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52 | * @param FieldItemInterface $value |
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53 | * |
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54 | * @return bool |
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55 | */ |
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56 | public function canConvert(FieldItemInterface $value) : bool |
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60 | } |
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61 |
Let’s take a look at an example:
In the above example, the authenticate() method works fine as long as you just pass instances of MyUser. However, if you now also want to pass a different implementation of User which does not have a getDisplayName() method, the code will break.
Available Fixes
Change the type-hint for the parameter:
Add an additional type-check:
Add the method to the interface: