search.py

@register.filter
def search_description(obj, query):
    for term in [query] + query.split():
        pattern = re.compile(re.escape(term), re.IGNORECASE)
        if pattern.search(obj.title):
            return obj.description
        for content in (obj.description, obj.content):
            match = pattern.search(content)
            if match:
                start = max(match.start() - 100, 0)
                while start > 0 and content[start] not in (" ", "\t", "\n", "\r"):
                    start -= 1
                end = min(match.end() + 100, len(content))
                while end < len(content) and content[end] not in (" ", "\t", "\n", "\r"):
                    end += 1
                content_sub = content[start:end]
                def replace_match(match):
                    return u"<strong>{match}</strong>".format(
                        match = match.group(),
                    )
                content_sub = pattern.sub(replace_match, content_sub)
                if start > 0:
                    content_sub = u"…" + content_sub
                if end < len(content):
                    content_sub += u" …"
                return content_sub
    return obj.description