text: from sqlalchemy import ForeignKey, Integer
  
  from eNMS.database import db
  from eNMS.forms import LinkForm
  from eNMS.fields import HiddenField, SelectField, StringField
  from eNMS.models.inventory import Link
  
  
  class EthernetLink(Link):
  
      __tablename__ = "ethernet_link"
      __mapper_args__ = {"polymorphic_identity": "ethernet_link"}
      pretty_name = "Ethernet Link"
      id = db.Column(Integer, ForeignKey("link.id"), primary_key=True)
      speed = db.Column(db.SmallString)
      standard = db.Column(db.SmallString)
  
  
  class EthernetLinkForm(LinkForm):
      form_type = HiddenField(default="ethernet_link")
      speed = StringField("Serial Number", default=22)
      standard = SelectField(
          "Standard",
          choices=(
              ("10BASE2", "10BASE2"),
              ("10BASE5", "10BASE5"),
              ("10BASE-T", "10BASE-T"),
              ("1000BASE-T", "1000BASE-T"),
              ("10GBASE-T", "10GBASE-T"),
          ),
      )
      properties = ["speed", "standard"]
  