Rails 4. How to make a loadable value from the database?

Question

Ruby on Rails

Good afternoon,
In one of the forms I have a select field that contains the following construction:
<%= f.select :dic_country_id, options_from_collection_for_select(@countries, "id", "country_name") %>
You can select a country in the field, let's say Russia , then saved successfully. The next time the form is accessed, the country selection list reappears in alphabetical order, and I need the value from the database to be loaded into the select field (i.e. the starting point was Russia, not Abkhazia, because it is the first in alphabetical order) .
Thank you in advance

Answer 1

If you want from the database, then try to set the value yourself as the fourth parameter for options_from_collection_for_select
Something like this:

<%= f.select :dic_country_id, options_from_collection_for_select(@countries, "id", "country_name",  значение_с_объекта) %>

Answer 2

Thanks for the solution, everything worked.
It is important to remember that the fourth parameter must be of type integer.