ruby on rails - Create input with maxlength based on database size -


how write text_field in view, automatically respects size of database field?

my migration:

t.string :name, limit: 100

my view:

<%= f.text_field :name %>

well, there way done. write code inside /helper directory, , put method inside :

module applicationhelper   def column_info model_name, field_name, option     model_name.constantize.column_types[field_name].public_send option   end  end

now, use helper method anywhere inside view..

<%= f.text_field :name, size: column_info('person', :name, :limit) || 100 %>

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