Long search field causing error in search_maintenance

[mm-johnpeterson]

Describe the bug
A clear and concise description of what the bug is.
Running a Centos 7 deployment I run into an issue when trying to run search_maintenance.
django.db.utils.DataError: value too long for type character varying(254)

To Reproduce
Steps to reproduce the behavior:

1. su - saluser
2. cd sal_env
3. source bin/activate
4. cd sal
5. python2.7 manage.py search_maintenance
6. See error

/srv/saluser/sal_env/lib/python2.7/site-packages/django/db/models/fields/__init__.py:1430: RuntimeWarning: DateTimeField SavedSearch.created received a naive datetime (2018-11-27 18:39:34.789562) while time zone support is active.
  RuntimeWarning)
Traceback (most recent call last):
  File "manage.py", line 10, in <module>
    execute_from_command_line(sys.argv)
  File "/srv/saluser/sal_env/lib/python2.7/site-packages/django/core/management/__init__.py", line 367, in execute_from_command_line
    utility.execute()
  File "/srv/saluser/sal_env/lib/python2.7/site-packages/django/core/management/__init__.py", line 359, in execute
    self.fetch_command(subcommand).run_from_argv(self.argv)
  File "/srv/saluser/sal_env/lib/python2.7/site-packages/django/core/management/base.py", line 305, in run_from_argv
    self.execute(*args, **cmd_options)
  File "/srv/saluser/sal_env/lib/python2.7/site-packages/django/core/management/base.py", line 356, in execute
    output = self.handle(*args, **options)
  File "/srv/saluser/sal_env/sal/search/management/commands/search_maintenance.py", line 117, in handle
    SearchFieldCache.objects.bulk_create(search_fields)
  File "/srv/saluser/sal_env/lib/python2.7/site-packages/django/db/models/manager.py", line 85, in manager_method
    return getattr(self.get_queryset(), name)(*args, **kwargs)
  File "/srv/saluser/sal_env/lib/python2.7/site-packages/django/db/models/query.py", line 452, in bulk_create
    ids = self._batched_insert(objs_without_pk, fields, batch_size)
  File "/srv/saluser/sal_env/lib/python2.7/site-packages/django/db/models/query.py", line 1060, in _batched_insert
    inserted_id = self._insert(item, fields=fields, using=self.db, return_id=True)
  File "/srv/saluser/sal_env/lib/python2.7/site-packages/django/db/models/query.py", line 1043, in _insert
    return query.get_compiler(using=using).execute_sql(return_id)
  File "/srv/saluser/sal_env/lib/python2.7/site-packages/django/db/models/sql/compiler.py", line 1054, in execute_sql
    cursor.execute(sql, params)
  File "/srv/saluser/sal_env/lib/python2.7/site-packages/django/db/backends/utils.py", line 64, in execute
    return self.cursor.execute(sql, params)
  File "/srv/saluser/sal_env/lib/python2.7/site-packages/django/db/utils.py", line 94, in __exit__
    six.reraise(dj_exc_type, dj_exc_value, traceback)
  File "/srv/saluser/sal_env/lib/python2.7/site-packages/django/db/backends/utils.py", line 64, in execute
    return self.cursor.execute(sql, params)
django.db.utils.DataError: value too long for type character varying(254)

Server (please complete the following information):

• Host environment [Centos 7. The environment is almost identical to https://github.com/salopensource/sal/wiki/RHEL-7 ]
• Version [Sal version 3.3.13.1621]

Client (please complete the following information):
Not affected.

[mm-johnpeterson]

This can likely be closed. Still trying to determine what field was that long as it has since disappeared but I modified the length of search_field and search_model under search_searchfieldcache and can now run search_maintenance.

[grahamgilbert]

Can you PR what you did? There isn't really any reason for this to be kept to just your install.