file_field(object_name, method, options = {})
Instance Public methods
Returns a file upload input tag tailored for accessing a specified
attribute (identified by method) on an object assigned to the
template (identified by object). Additional options on the
input tag can be passed as a hash with options. These options
will be tagged onto the HTML as an HTML element attribute as in the example shown.
Using this method inside a form_for block will set the
enclosing form's encoding to