d9ae3db8d5
Express follow_recommendations in terms of account_summaries rather than accounts, integrate filters that are unconditionally used, and materialize the resulting view. This should result in the bulk of the computation being performed only once instead of **once per recommendation language**.
19 lines
615 B
Ruby
19 lines
615 B
Ruby
class UpdateFollowRecommendationsToVersion2 < ActiveRecord::Migration[6.1]
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# We're switching from a normal to a materialized view so we need
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# custom `up` and `down` paths.
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def up
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drop_view :follow_recommendations
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create_view :follow_recommendations, version: 2, materialized: true
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# To be able to refresh the view concurrently,
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# at least one unique index is required
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safety_assured { add_index :follow_recommendations, :account_id, unique: true }
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end
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def down
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drop_view :follow_recommendations, materialized: true
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create_view :follow_recommendations, version: 1
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end
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end
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