method
validate
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Class: ActiveRecord::Migrator
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validate(migrations)
private
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# File activerecord/lib/active_record/migration.rb, line 1012 def validate(migrations) name ,= migrations.group_by(&:name).find { |_,v| v.length > 1 } raise DuplicateMigrationNameError.new(name) if name version ,= migrations.group_by(&:version).find { |_,v| v.length > 1 } raise DuplicateMigrationVersionError.new(version) if version end