import fileinput
import re
import sys

active_model = ""

for line in fileinput.input():
    if active_model == "" and not line.startswith("class"):
        sys.stdout.write(line)
        continue
    if line.startswith("#"):
        sys.stdout.write(line)
        continue
    if line.startswith("class"):
        active_model = re.findall("class\ (.*)\(models.Model\):", line)[0]
        sys.stdout.write(line)
        continue
    if "models.ForeignKey" in line:
        line = re.sub("ForeignKey\((.*),", "ForeignKey('\\1',", line)
        line = re.sub("''self''", "'self'", line)
        db_column = re.findall("db_column='(.*)'", line)[0]
        line = re.sub("\)$", ", related_name='%s_%s')" % (active_model.lower(), db_column), line)
        sys.stdout.write(line)
        continue
    sys.stdout.write(line)