WASHINGTON — A judge, called a “hater” by Donald J. Trump for his handling of a lawsuit related to the businessman’s Trump University real estate school, has ordered documents related to the case to be unsealed.

Mr. Trump is fighting a lawsuit that accuses his school venture of misleading thousands of people who paid up to $35,000 for seminars to learn about Mr. Trump’s real estate investment strategies.

In an order signed on Friday, Judge Gonzalo P. Curiel of United States District Court said that related materials, including Trump University procedures on dealing with students and the news media, should be unsealed.

He noted that the material had already been published by Politico and that a magistrate judge described them previously as “routine” and “commonplace.”