discourse/db/migrate/20140827044811_remove_nulla...

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# frozen_string_literal: true
class RemoveNullableDates < ActiveRecord::Migration[4.2]
def up
# must drop so we can muck with the column
execute "DROP VIEW badge_posts"
# Rails 3 used to have nullable created_at and updated_at dates
# this is no longer the case in Rails 4, some old installs have
# this relic
# Fix it
sql = "select table_name, column_name from information_schema.columns
WHERE column_name IN ('created_at','updated_at') AND
table_schema = 'public' AND
is_nullable = 'YES' AND
is_updatable = 'YES' AND
data_type = 'timestamp without time zone'"
execute(sql).each do |row|
table = row["table_name"]
column = row["column_name"]
execute "UPDATE \"#{table}\" SET #{column} = CURRENT_TIMESTAMP WHERE #{column} IS NULL"
change_column table.to_sym, column.to_sym, :datetime, null: false
end
execute "CREATE VIEW badge_posts AS
SELECT p.*
FROM posts p
JOIN topics t ON t.id = p.topic_id
JOIN categories c ON c.id = t.category_id
WHERE c.allow_badges AND
p.deleted_at IS NULL AND
t.deleted_at IS NULL AND
NOT c.read_restricted AND
t.visible"
end
def down
# no need to revert
end
end