Drew Harris Drew Harris - 2 years ago 206
Ruby Question

rails erb form helper options_for_select :selected

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 Source

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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