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mastodon/db/migrate/20170901141119_truncate_pre...

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# frozen_string_literal: true
class TruncatePreviewCards < ActiveRecord::Migration[5.1]
def up
rename_table :preview_cards, :deprecated_preview_cards
create_table :preview_cards do |t|
t.string :url, default: '', null: false, index: { unique: true }
t.string :title, default: '', null: false
t.string :description, default: '', null: false
t.attachment :image
t.integer :type, default: 0, null: false
t.text :html, default: '', null: false
t.string :author_name, default: '', null: false
t.string :author_url, default: '', null: false
t.string :provider_name, default: '', null: false
t.string :provider_url, default: '', null: false
t.integer :width, default: 0, null: false
t.integer :height, default: 0, null: false
t.timestamps
end
end
def down
if ActiveRecord::Base.connection.table_exists? 'deprecated_preview_cards'
drop_table :preview_cards
rename_table :deprecated_preview_cards, :preview_cards
else
raise ActiveRecord::IrreversibleMigration, 'Previous preview cards table has already been removed'
end
end
end