33 lines
1004 B
Ruby
33 lines
1004 B
Ruby
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class AddSearchColumn < ActiveRecord::Migration[5.1]
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def self.up
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add_column :products, :tsv, :tsvector
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add_index :products, :tsv, using: "gin"
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say_with_time("Adding trigger to update the ts_vector column") do
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execute <<-SQL
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CREATE FUNCTION products_tsv_trigger() RETURNS trigger AS $$
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begin
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new.tsv :=
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setweight(to_tsvector('pg_catalog.english', coalesce(new.name,'')), 'A') ||
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setweight(to_tsvector('pg_catalog.english', coalesce(new.description,'')), 'B');
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return new;
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end
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$$ LANGUAGE plpgsql;
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CREATE TRIGGER tsvectorupdate BEFORE INSERT OR UPDATE ON products FOR EACH ROW EXECUTE PROCEDURE products_tsv_trigger();
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SQL
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end
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end
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def self.down
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say_with_time("Removing trigger to update the tsv column") do
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execute <<-SQL
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DROP TRIGGER tsvectorupdate
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ON products
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SQL
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end
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remove_index :products, :tsv
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remove_column :products, :tsv
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end
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end
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