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30990006a9
This reduces chances of errors where consumers of strings mutate inputs and reduces memory usage of the app. Test suite passes now, but there may be some stuff left, so we will run a few sites on a branch prior to merging
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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