Support for augmenting with websearch_to_tsquery, phraseto_tsquery, plainto_tsquery

[stv8]

As seen here: https://www.postgresql.org/docs/current/textsearch-controls.html

class Post < ApplicationRecord
    pg_search_scope :search_by_title, against: :title
end

Post.search_by_title("word|word")
Post.search_by_title.phrase("somebody once told me the world was gonna roll me")
Post.search_by_title.plain("Shrek is the best")

pg_search/lib/pg_search/features/tsearch.rb

Lines 101 to 113 in 056bddb

	def tsquery_for_term(unsanitized_term)
	if options[:negation] && unsanitized_term.start_with?("!")
	unsanitized_term[0] = ""
	negated = true
	end
	sanitized_term = unsanitized_term.gsub(DISALLOWED_TSQUERY_CHARACTERS, " ")
	term_sql = Arel.sql(normalize(connection.quote(sanitized_term)))
	tsquery = tsquery_expression(term_sql, negated: negated, prefix: options[:prefix])
	Arel::Nodes::NamedFunction.new("to_tsquery", [dictionary, tsquery]).to_sql

Maybe we can add an options hash here to swap out the desired function? I'm new to Ruby but this is my best guess.

[mikehale]

Drop this into config/initializers/pg_search.rb

  module PgSearch::Features::TSearchOptions
    module Websearch
      extend ActiveSupport::Concern

      def tsquery
        if options[:websearch]
          return "''" if query.blank?

          term_sql = Arel.sql(normalize(connection.quote(query)))
          Arel::Nodes::NamedFunction.new('websearch_to_tsquery', [dictionary, term_sql]).to_sql
        else
          super
        end
      end

      class_methods do
        def valid_options
          super + %i[websearch]
        end
      end
    end
  end

  PgSearch::Features::TSearch.prepend(PgSearch::Features::TSearchOptions::Websearch)

Then update your scope options on your model to include websearch: true

  pg_search_scope :search,
    using: {
      tsearch: { dictionary: 'simple', websearch: true }
    }

[stv8]

@mikehale Going to give this a shot tonight, thanks for the snippet!