method

to_form_params

Ruby on Rails latest stable (v7.1.3.2) - 0 notes - Class: ActionView::Helpers::UrlHelper

1.0.0
1.1.6
1.2.6
2.0.3
2.1.0
2.2.1
2.3.8
3.0.0
3.0.9
3.1.0
3.2.1
3.2.8
3.2.13
4.0.2
4.1.8
4.2.1
4.2.7
4.2.9
5.0.0.1 (0)
5.1.7 (19)
5.2.3 (0)
6.0.0 (38)
6.1.3.1 (0)
6.1.7.7 (0)
7.0.0 (0)
7.1.3.2 (0)
7.1.3.4 (0)
What's this?

to_form_params(attribute, namespace = nil) private

Returns an array of hashes each containing :name and :value keys suitable for use as the names and values of form input fields:

to_form_params(name: 'David', nationality: 'Danish')
# => [{name: 'name', value: 'David'}, {name: 'nationality', value: 'Danish'}]

to_form_params(country: { name: 'Denmark' })
# => [{name: 'country[name]', value: 'Denmark'}]

to_form_params(countries: ['Denmark', 'Sweden']})
# => [{name: 'countries[]', value: 'Denmark'}, {name: 'countries[]', value: 'Sweden'}]

An optional namespace can be passed to enclose key names:

to_form_params({ name: 'Denmark' }, 'country')
# => [{name: 'country[name]', value: 'Denmark'}]

Show source

# File actionview/lib/action_view/helpers/url_helper.rb, line 854
        def to_form_params(attribute, namespace = nil)
          attribute = if attribute.respond_to?(:permitted?)
            attribute.to_h
          else
            attribute
          end

          params = []
          case attribute
          when Hash
            attribute.each do |key, value|
              prefix = namespace ? "#{namespace}[#{key}]" : key
              params.push(*to_form_params(value, prefix))
            end
          when Array
            array_prefix = "#{namespace}[]"
            attribute.each do |value|
              params.push(*to_form_params(value, array_prefix))
            end
          else
            params << { name: namespace.to_s, value: attribute.to_param }
          end

          params.sort_by { |pair| pair[:name] }
        end

to_form_params

Related methods