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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
14 lines
419 B
Ruby
14 lines
419 B
Ruby
# frozen_string_literal: true
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class AddLastPostedAtToUsers < ActiveRecord::Migration[4.2]
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def change
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add_column :users, :last_posted_at, :datetime, null: true
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add_index :users, :last_posted_at
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execute "UPDATE users
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SET last_posted_at = (SELECT MAX(posts.created_at)
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FROM posts
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WHERE posts.user_id = users.id)"
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end
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end
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