From 7a00acb3e49f441d975ff509efabb0117875c61e Mon Sep 17 00:00:00 2001 From: rinpatch Date: Wed, 16 Oct 2019 13:49:33 +0300 Subject: [PATCH] Order fts results by trigram --- lib/pleroma/user/search.ex | 48 ++++++++++++++++++++++++-------------- 1 file changed, 30 insertions(+), 18 deletions(-) diff --git a/lib/pleroma/user/search.ex b/lib/pleroma/user/search.ex index fb2f3fedb..0d697fe3d 100644 --- a/lib/pleroma/user/search.ex +++ b/lib/pleroma/user/search.ex @@ -7,7 +7,6 @@ defmodule Pleroma.User.Search do alias Pleroma.User import Ecto.Query - @similarity_threshold 0.25 @limit 20 def search(query_string, opts \\ []) do @@ -47,16 +46,16 @@ defp search_query(query_string, for_user, following) do |> base_query(following) |> filter_blocked_user(for_user) |> filter_blocked_domains(for_user) - |> fts_subquery(query_string) - |> subquery() - |> where([u], u.search_rank > @similarity_threshold) + |> fts_search(query_string) + |> trigram_rank(query_string) |> boost_search_rank(for_user) + |> subquery() |> order_by(desc: :search_rank) |> maybe_restrict_local(for_user) end @nickname_regex ~r/^[a-zA-Z0-9.!#$%&'*+\/=?^_`{|}~\-@]+$/ - defp fts_subquery(query, query_string) do + defp fts_search(query, query_string) do {nickname_weight, name_weight} = if String.match?(query_string, @nickname_regex) do {"A", "B"} @@ -68,19 +67,17 @@ defp fts_subquery(query, query_string) do from( u in query, - select_merge: %{ - search_rank: - fragment( - """ - ts_rank_cd((setweight(to_tsvector('simple', ?), ?) || setweight(to_tsvector('simple', ?), ?)), to_tsquery('simple', ?)) - """, - u.name, - ^name_weight, - u.nickname, - ^nickname_weight, - ^query_string - ) - } + where: + fragment( + """ + (setweight(to_tsvector('simple', ?), ?) || setweight(to_tsvector('simple', ?), ?)) @@ to_tsquery('simple', ?) + """, + u.name, + ^name_weight, + u.nickname, + ^nickname_weight, + ^query_string + ) ) end @@ -93,6 +90,21 @@ defp to_tsquery(query_string) do |> Enum.join(" | ") end + defp trigram_rank(query, query_string) do + from( + u in query, + select_merge: %{ + search_rank: + fragment( + "similarity(?, trim(? || ' ' || coalesce(?, '')))", + ^query_string, + u.nickname, + u.name + ) + } + ) + end + defp base_query(_user, false), do: User defp base_query(user, true), do: User.get_followers_query(user)