This PR was merged into the 2.3 branch. Discussion ---------- Completely re-reading the data transformers chapter | Q | A | ------------- | --- | Doc fix? | yes | New docs? | no | Applies to | 2.3+ | Fixed tickets | #5307 **Note**: `setDefaultOptions()` -> `configureOptions()` in 2.7 after merge Hi guys! This follows after #5307, which helped update the article (but also added some new complexity). Data transformers are super cool, but I think we've over-complicated them in the past. Even for me, before re-writing this, I tried to avoid transformers because I thought they were hard :). The code for this can be found here: https://github.com/weaverryan/docs-data-transformer/commits/finish, where each commit that starts with "[tuts-apply-diff]" is a "step" in the tutorial. My goals: 1) Show an easy example using the CallbackTransformer in the beginning 2) Remove complexity related to any factories that were there before 3) Moved theoretical section to the bottom Thanks! Commits ------- 0762848 Adding an example of how the other format for attaching transformers looks 28d7f89 fixed typo thanks to @OskarStark 41bb907 adding use statement 1514fdd using the aliases entity manager service name 9be07f0 Many tweaks thanks to review b48feda Completely re-reading the data transformers chapter:
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         $form->get('dueDate')->setData(new \DateTime());
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 Defining your Forms as Services
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