Donal McBreen
e8abc66eba
Add a single search_index table for full-text search of cards and comments. For the search there is a full-text index on the title and content columns. The board_ids is also included in the table and accessible board ids are pre-loaded and included in the search query. This allows us to filter out inaccessible records before joining with other tables. Right now the search is just using boolean search. This would give us a bunch of syntax options (see https://dev.mysql.com/doc/refman/8.4/en/fulltext-boolean.html) except the search query filters those out. I've removed the searchable_by method for now - everything is built on the assumption that there's a single search index table and all data must fit into it. Queries are written in SQL, we don't have a SearchIndex ActiveRecord model. That's because we'll likely want to shard the table and it will be simpler to just keep with the raw SQL for that. There's no stemming, highlighting or snippet extraction yet - we are dumping the full description in the search results. Data can be reindexed with the search:reindex rake task.
52 lines
1.8 KiB
Ruby
52 lines
1.8 KiB
Ruby
class Search
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attr_reader :user, :query
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HIGHLIGHT_OPENING_MARK = "<mark class=\"circled-text\"><span></span>"
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HIGHLIGHT_CLOSING_MARK = "</mark>"
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def self.table_name_prefix
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"search_"
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end
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def initialize(user, query)
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@user = user
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@query = Query.wrap(query)
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end
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def results
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if query.valid? && board_ids.any?
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perform_search
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else
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Search::Result.none
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end
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end
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private
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def board_ids
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@board_ids ||= user.board_ids
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end
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def perform_search
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query_string = query.to_s
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sanitized_query = Search::Result.connection.quote(query_string)
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Search::Result.from("search_index")
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.joins("INNER JOIN cards ON search_index.card_id = cards.id")
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.joins("INNER JOIN boards ON cards.board_id = boards.id")
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.where("search_index.board_id IN (?)", board_ids)
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.where("MATCH(search_index.content, search_index.title) AGAINST(? IN BOOLEAN MODE)", query_string)
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.select([
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"search_index.card_id as card_id",
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"CASE WHEN search_index.searchable_type = 'Comment' THEN search_index.searchable_id ELSE NULL END as comment_id",
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"COALESCE(search_index.title, cards.title) AS card_title_in_database",
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"CASE WHEN search_index.searchable_type = 'Card' THEN search_index.content ELSE NULL END AS card_description_in_database",
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"CASE WHEN search_index.searchable_type = 'Comment' THEN search_index.content ELSE NULL END AS comment_body_in_database",
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"boards.name as board_name",
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"cards.creator_id",
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"search_index.created_at as created_at",
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"MATCH(search_index.content, search_index.title) AGAINST(#{sanitized_query} IN BOOLEAN MODE) AS score"
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].join(","))
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.order("search_index.created_at DESC")
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end
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end
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