postgresql，ADD CONSTRAINT错误

Question

rails db：migrate 给出错误：= 类型＆＃34; email_must_be_company_email＆＃34;不存在..

迁移文件是............

class AddEmailConstraintToUsers < ActiveRecord::Migration 
  def up
     execute %{
       ALTER TABLE users
       ADD CONTRAINT ***email_must_be_company_email***
       CHECK ( email ~* '^[^@]+@example\\.com'  )
      }  
  end  

  def down
    execute %{
      ALTER TABLE users
      DROP CONTRAINT ***email_must_be_company_email***
    }
 end
end

Answer 1

您已将CONSTRAINT一词拼错为CONTRAINT，因此postgres将其解释为列名，并将email_must_be_company_email解释为列类型。