How to find out the contents of a field (like f.name) from a form in Rails?

Question

Ruby on Rails

Here, when editing, the value is not explicitly set in the form through value='<%= ... %>', but is somehow generated.
How can I find out what value a certain field has. So <%= f.name %> doesn't work.

Answer 1

Look for a method form_for, take its first argument, and outputаргумент.name

Answer 2

f.object.name

Answer 3

If the form looks like form_for @object (and so on), then you need to substitute @object.attribute in the value, in your case @object.name.