23 lines
562 B
Ruby
23 lines
562 B
Ruby
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class CreateUserUploads < ActiveRecord::Migration[5.2]
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def up
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create_table :user_uploads do |t|
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t.integer :upload_id, null: false
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t.integer :user_id, null: false
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t.datetime :created_at, null: false
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end
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add_index :user_uploads, [:upload_id, :user_id], unique: true
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execute <<~SQL
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INSERT INTO user_uploads(upload_id, user_id, created_at)
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SELECT id, user_id, COALESCE(created_at, current_timestamp)
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FROM uploads
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WHERE user_id IS NOT NULL
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SQL
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end
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def down
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drop_table :user_uploads
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end
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end
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