rails erb form helper options_for_select :selected

ruby-on-rails ruby ruby-on-rails-3 selected form-helpers
Drew Harris picture Drew Harris · Oct 1, 2013 · Viewed 43.6k times · Source

I have an edit form in erb.

<%= form_for @animal do |f| %>

Within the code I have a select with options:

<%= f.select :gender, options_for_select([['Mare'], ['Stallion'], ['Gelding']], :selected => :gender) %>

However, the select is not showing the correct selected value. What could I be doing wrong? I can get it to work if I hardcode it but of course that is not a viable option.

Answer

kristinalim picture kristinalim · Oct 1, 2013

In your code, your options_for_select() call sets the selected value to "gender" and does not attempt to use the value from your form object.

Please see the docs for options_for_select() for usage examples.

options_for_select(['Mare', 'Stallion', 'Gelding'], f.object.gender)
options_for_select(['Mare', 'Stallion', 'Gelding'], :selected => f.object.gender)

Alternatively, you can do this, which will already use the gender() value for your form object:

<%= f.select :gender, ['Mare', 'Stallion', 'Gelding'] %>

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