如何将数据分配给表单上的变量？ [Ruby on rails]

Question

I wanted to assign a value from a form, to a variable, so I can work with that value before I save it. Also how I add a t.text_field that doesn't require a variable, wont be saved, wont do anything, i just wanted to be there.

Answer 1

HTML does not have variables. I'm assuming you want to assign the value of a form input to a variable in your controller? That is what the params hash is for. In your controller you could assign the value of a input called field like this

myField = params[:thing][:field] 

You can always add an input to a form and ignore it in your controller. Open the form with something like this

<%= form_for @thing do |f| %>

Then you can add a random input that's not part of your thing model like

<%= text_field_tag :randomInput %>

You can read up on form helpers here http://guides.rubyonrails.org/form_helpers.html