Haystack tweaks for Django 1.7.7. I had to upgrade to Haystack 2.3.1 to get it to work with Django 1.7.7. I also had to update the Xapian backend. But I ran into problems. On my laptop anyway (Ubuntu 14.0.4), xapian gets mad when search terms are greater than 245 chars (or something) when indexing. So I created a custom field that would simply omit terms greater than 64 chars and used this field everywhere I previously used a CharField. Secondly, the custom search form was broken now. Something changed in the Xapian backend and exact searches stopped working. Fortunately the auto_query (which I was using originally and broke during an upgrade) started working again. So I cut the search form back over to doing an auto_query. I kept the form the same (3 fields) because I didn't want to change the form and I think it's better that way.

"""
Forms for the Shoutbox application.
"""

import re
from django import forms

url_re = re.compile('('
   r'^https?://' # http:// or https://
   r'(?:(?:[A-Z0-9-]+\.)+[A-Z]{2,6}|' #domain...
   r'localhost|' #localhost...
   r'\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3})' # ...or ip
   r'(?::\d+)?' # optional port
   r'(?:/?|/\S+))', re.IGNORECASE)


class ShoutBoxForm(forms.Form):
   msg = forms.CharField(label='', max_length=2048, required=True)

   def get_shout(self):
      msg = self.cleaned_data['msg']
      msg = re.sub(url_re, r'<a href="\1">URL</a>', msg)
      return msg