There can be many instances in testing with capybara where you might need to interact with hidden fields. By default capybara’s
find_field
selector ignores hidden fields.
To get the value of the hidden field you can use
page.all
page.all("input['name=you_input_name']", :visible => false).first.value
# you have to use first as it returns and array of element matching the query criteria
To set the value of the hidden field you can use
page.all("input['name=you_input_name']", :visible => false).first.set(value_to_set)