Modify trust level for all users

Here’s an example of a bulk operation to set the trust level to 2 for all users currently at trust level 0 or 1:

This is slow, but ensures that locked trust levels aren’t changed. But it may be preferred especially when you have fewer that 1000 users

User.where(trust_level: [0, 1]).find_each do |user|
   user.change_trust_level!(TrustLevel[2])
end

If there were more than 1000 users, I would have used this instead, but this would not respect locked trust levels.

DB.exec("UPDATE users SET trust_level = 2 WHERE trust_level IN (0, 1)")
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