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# This patches ActiveRecord so indexes for binary columns created using the
# MySQL adapter apply a length of 20. Otherwise MySQL can't create an index on
# binary columns.
module MysqlSetLengthForBinaryIndex
def add_index(table_name, column_names, options = {})
Array(column_names).each do |column_name|
column = ActiveRecord::Base.connection.columns(table_name).find { |c| c.name == column_name }
if column&.type == :binary
options[:length] = 20
end
end
super(table_name, column_names, options)
end
end
if defined?(ActiveRecord::ConnectionAdapters::Mysql2Adapter)
ActiveRecord::ConnectionAdapters::Mysql2Adapter.send(:prepend, MysqlSetLengthForBinaryIndex)
end
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