I study the symfony 2.6 and 2.7, it very intersting!
Today I found a bug:
I use annotation for set constraints on field my class:
Symfony added html attrbute maxlength="15" in the tag, but I removed this attribute with FireBug tools;
After this action I type value more then 15 symbols, I send form, and Symfony 2.7 write this value to database as valid!
(I used $form->isValid() )
I mean, this is bug, I want send it in Symfony community.