Django haystack：如果searchterm出现在特定字段中，则提升搜索结果

I'm using django-haystack for searching on my site. My problem is, I would like to have search results on top if the search term was found in a specific field. Let's say I search for blog-entries, then I would like to show those results on top where the search term was found in the title field.I'm using django-haystack for searching on my s