72 lines
1.7 KiB
Ruby
72 lines
1.7 KiB
Ruby
# frozen_string_literal: true
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class AddUserExtras < ActiveRecord::Migration[4.2]
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def up
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# NOTE: our user table is getting bloated, we probably want to split it for performance
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# put lesser used columns into a user_extras table and frequently used ones here.
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add_column :users, :likes_given, :integer, null: false, default: 0
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add_column :users, :likes_received, :integer, null: false, default: 0
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add_column :users, :topic_reply_count, :integer, null: false, default: 0
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# NOTE: to keep migrations working through refactorings we avoid externalizing this stuff.
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# even though a helper method may make sense
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execute <<SQL
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UPDATE users u
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SET
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likes_given = X.likes_given
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FROM (
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SELECT
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a.user_id,
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COUNT(*) likes_given
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FROM user_actions a
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JOIN posts p ON p.id = a.target_post_id
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WHERE p.deleted_at IS NULL AND a.action_type = 1
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GROUP BY a.user_id
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) as X
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WHERE X.user_id = u.id
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SQL
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execute <<SQL
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UPDATE users u
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SET
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likes_received = Y.likes_received
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FROM (
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SELECT
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a.user_id,
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COUNT(*) likes_received
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FROM user_actions a
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JOIN posts p ON p.id = a.target_post_id
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WHERE p.deleted_at IS NULL AND a.action_type = 2
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GROUP BY a.user_id
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) as Y
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WHERE Y.user_id = u.id
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SQL
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execute <<SQL
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UPDATE users u
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SET
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topic_reply_count = Z.topic_reply_count
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FROM (
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SELECT
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p.user_id,
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COUNT(DISTINCT topic_id) topic_reply_count
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FROM posts p
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JOIN topics t on t.id = p.topic_id
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WHERE t.user_id <> p.user_id AND
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p.deleted_at IS NULL AND t.deleted_at IS NULL
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GROUP BY p.user_id
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) Z
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WHERE
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Z.user_id = u.id
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SQL
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end
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def down
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remove_column :users, :likes_given
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remove_column :users, :likes_received
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remove_column :users, :topic_reply_count
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end
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end
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