ActionView::Helpers::FormTagHelper

field_name

def field_name(object_name, method_name, *method_names, multiple: false, index: nil)

Returns a name value as a string, in the same format that text_field and other FormHelper helpers use.

Changing a value updates the ERB and HTML.

object_name

:article

""

The first part of the name. If it is an empty string, the name starts with method_name, without [] around it.

method_name:tags

Added after object_name, wrapped in [].

method_names = nil

:subtitle

Added after method_name, each wrapped in []. You can pass any number of them.

multiple = false

true

true adds [] to the end.

index = nil

Added after object_name, wrapped in []. If object_name is empty, it is not added.

Changes from the previous output: Added Removed Changed

Interacting with the preview updates the form submission.

Form data

name	value

Request body

Content-Type:

params