Prompt from collection_selection not displayed in Rails

Question

I have a collection_select as below. What I want is to display the prompt value on page load and not the id of the object. But now it displays the value of the id of the f object of the form on page load.

How can I change it so that as soon as the page loads the prompt value is displayed and the other id values are shown when the collection_select is clicked?

<%= f.collection_select(:id, Animal.all, :id, :id, {include_blank: 'Select animal'}, selected: params[:id]) %>

I tried this also:

<%= f.collection_select(:id, Animal.all, :id, :id, {include_blank: 'Select animal'}, selected: params[:id]) %>

This time Select animal is shown at the top when collection_select is clicked but the id of the present Animal object is displayed on page load. In the first case prompt value is not displayed anywhere. How can I change it?

Answer 1

您可以尝试跟随它，

<%= f.collection_select(:id, Animal.all, :id, :id, include_blank: 'Select animal', selected: Animal.find(params[:id])) %>