Populate a drop down select list with the results from a view with entity reference relationships

Question

Ok. Perhaps this has been asked before in this site somewhere but for the life of me I can't find an answer.

I have three content types: Client, Contact and Job ticket.

Clients are companies with whom I conduct business. Contacts are contact persons within these companies. The Contact content type has a reference field referencing their company's node. Job tickets are tickets for jobs these companies hire me to do for them. In this content type I have two reference fields: one for the Client and one for the Contact.

What I need is to have the Contact reference field (drop down select list) dynamically populated with the contacts for the client I chose in the Client reference field (another drop down select list). Because if I populate it with ALL the Contact nodes then I get a very big list and I don't know which contact belong to Which company.

I know I can do this with a entity reference view display but I don't know how to configure it.

Thanks in advance for your help.

Answer 1

Reference field option limit

This module allows reference fields of several types to have their widgets' available options limited by the values of other fields in the current entity.

I think this link might already be enough.
If not, then I am happy to expand the answer with more specifics.

Answer 2

Another option:
Entity Reference View Widget

You need some custom code and patches to make this depend on another field:

• Provide alter hook for view arguments
• Provide referencing entity as views argument

I did not try any of this, so I don't go into too much detail. Still I think this deserves to be a separate answer, to not get mixed up with the other one.