GEM pluck to hash example

pluck_to_hash_example.rb

    if @records
      posts = @records.map{|p| p.post_id}

      posts_extra_data = Message::Post
        .joins(
          'LEFT JOIN "message_webs" ON "message_webs"."post_id" = "message_posts"."id"',
          'LEFT JOIN "source_sources" ON "source_sources"."id" = "message_posts"."source_source_id"',
          'LEFT JOIN "source_sections" ON "source_sections"."id" = "message_posts"."source_section_id"'
        )
        .where(id: posts)
        .pluck_h(
          :id,
          'message_webs.link_url AS link_url',
          'source_sources.id AS source_id',
          'source_sources.title AS source_title',
          'source_sections.id AS section_id',
          'source_sections.title AS section_title'
        )

      @records_web_links = {}; posts_extra_data.each{|p| @records_web_links[p['id']] = p['link_url']}
      @records_sources   = {}; posts_extra_data.select{|p| !p['source_id'].nil?}.each{|p| @records_sources[p['source_id']] = p['source_title']}
      @records_sections  = {}; posts_extra_data.select{|p| !p['section_id'].nil?}.each{|p| @records_sections[p['section_id']] = p['section_title']}
    end