form_for tag and :id symbol issue

rubyonrails-talk
1

Hi

I am new to RoR and practice some ruby/rails language feathers on my toy application. Here is a question about form_for tag in rails.

== the story People profile can be modified by end user, so there is method called "update_profile" in the controller.

== the view

<% form_for :person,@person, :url => ....do |f|%>     <%f.hidden_field :id %>     <%f.text_field :ppl_name%>     ... <% end%>

== the controller def update_profile   person = Person.new(params[:person])   puts person.id

  person.new_record = false;   person.save end

When I print person.id out, the value is nil. However, i can set the id using below code person.id = params[:ppl_id] Can someone explain why so weird? Thanks

--jack

2

I think if you are using form_for you need to use update_attributes() to update the record

3

You don't want to create a new Person, do you? You want to just find the existing person and update it:

person = Person.find(params[:id]) person.update_attributes(params[:person])

And also, new_record is generally something you don't want to touch - rails will control it automatically.

Jeff softiesonrails.com