Symfony 3.0 nested entities not saving

Question

So I have an Experiment Entity which has many RNASeq entities. However, when I try to save an Experiment with an RNASeq entry (via the newAction), only the Expe

Answer 1

This is a very common issue. You need to take care of cross referencing your objects. Doctrine does not do this automatically though many people initially seem to think it will.

class Experiment {
  public function addRNASeq($seq) {
    $this->seqs[] = $seq;
    $seq->setExperiment($this);  // This is what you are missing

And add the attribute cascade=all to your Experiment::seqs property. Then you won't need to explicitly persist the seq entities.