undefined method named "getBlockPrefix" about liformbundle HOT 3 CLOSED

A lead I have is that my editForm is a nested form :

public function buildForm(FormBuilderInterface $builder, array $options)
{
$builder
->add('name', 'text', array(
'label' => 'Name',
'max_length' => 255,
))
->add('target', 'targeting', array(
'cascade_validation' => true,
));
}

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Aw, yes. All of this will break in Sf < 2.8, because it introduced major changes in the form component. I have been trying to do a quick fix, but it would need more work than that. As reference, this kind of work is what would be needed matthiasnoback/symfony-console-form@8554cdf#diff-4686463430e4b4932c485ab974a92154 (Note that in this case they are deprecating sf2.7, but the lines in red contain hints of what is needed to support 2.7).

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After thinking, and as suggested in this PR, I have decided to not support 2.7, because it would require to maintain a complete different code base. It would be like maintaining two separate libs.

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