Symfony 1.4: Widget Does Not Exist Error after Unset
With symfony’s form builder, users will need to unset several common fields such as created_at and updated_at. Beginners frequently experience a “widget does not exist” error after unsetting form fields.
To remove fields from symfony’s forms, coders will unset the fields in the form files found in the /lib/form/doctrine/ directory. After unsetting these fields, beginners are perplexed by the errors stating that the removed widgets do not exist.
The problem is not in the unset of the fields. That has likely occurred correctly. The error you are seeing is because symfony is still trying to render those fields that you just unset.
To fix this you need to remove references to these widgets. These are frequently found in your _form.php file.
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