1 | <?php |
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12 | class JobQueueCreateMapper extends BaseMapper |
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13 | { |
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14 | |||
15 | protected function mapMethod(JobBase $job) : Method { |
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18 | |||
19 | protected function mapUrl(JobBase $job) : Url { |
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22 | |||
23 | /** |
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24 | * @param JobQueueCreate $job |
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25 | * @return array |
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26 | */ |
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27 | protected function mapConfig(JobBase $job) : array { |
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42 | } |
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43 |
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 sub-classes 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 parent class: