more_like_this resulting in exception

[sunspot]

more_like_this resulting in exception

[dipth]

I'm using sunspot_rails 1.3.0

[JamesChevalier]

I'm having similar trouble - the problem I'm having is a bit different in that it's only occurring when I pass more than one object through more_like_this, but the error it presents is extremely similar. Here's how my more_like_this call is a bit different from yours:

mlt_results = Sunspot.more_like_this(@article, Article, Video, Event) do
  fields :title
end

Here's the error that I get (again, slightly different from yours):
undefined method 'more_like_this_fields' for #<Sunspot::CompositeSetup:0x10e98d5a0>

I've been poking around trying to find the cause. I'm not certain, but I think the issue has something to do with the composite_setup.rb file.

The lib/sunspot/composite_setup.rb only has a def all_more_like_this_fields block ... it does not have a def more_like_this_fields block (see line 115 of composite_setup.rb).

If you check out line 156 of sunspot/lib/sunspot/setup.rb, you'll see that there's a def more_like_this_fields block. This handles the situation where one object is provided. If more than one object is provided, then sunspot can't handle it.

To get around the issue, I separated my more_like_this calls out, and then concatenated each of the separate results - like this:

mlt_articles = Sunspot.more_like_this(@article, Article) do
  fields :title
  with(:published_at).greater_than(1.months.ago)
end

mlt_videos = Sunspot.more_like_this(@article, Video) do
  fields :title
  with(:published_at).greater_than(1.months.ago)
end

@results = (mlt_articles + mlt_videos).sort! { |a,b| a.published_at <=> b.published_at }

[bragboy]

This must have been fixed with the latest version of the library. Please feel free to reopen if this still exist