[entityreference_unique] Entityreference unique

# Summary

This modules adds a checkbox to an entity reference instance to enable a check for unique multiple entity reference fields. With this option enabled it is not possible to add one and the same entity to a multiple entity reference field.

# Project URL

https://www.drupal.org/project/entityreference_unique

# Where is the code?

None yet

# Estimated completion date

(If known, when is this module targeted for completion?)

# Dependencies

None

# Who's doing the port?

Nobody yet

# What help do they need?

(Are there specific types of resources (e.g. skillsets, $, sprints) that would be helpful to expedite porting?)

# D8 roadmap

https://www.drupal.org/node/2615230

# Background and reference information

• Drupal 8.0.0 will be released on November 19, 2015
• News about "Porting modules and themes to Drupal 8 "
• "Drupal Module Upgrader" module. Which can do some of this automatically for you, covering many API hooks.
• Documentation about "Converting 7.x modules to 8.x"

This module is use by ERPAL for Service Providers at https://www.drupal.org/project/erpal