I try do create a one-to-many connection in rails4. However, although I don't get an error, the nested attribute is not stored.
What am I doing wrong?
Station-Models
class Station < ActiveRecord::Base
has_many :adresses
accepts_nested_attributes_for :adresses
end
Adress-Model
class Adress < ActiveRecord::Base
belongs_to :station
end
Station-Controller class StationsController < ApplicationController
def new
@station = Station.new
@station.adresses.build
end
def create
@station = Station.new(station_params)
@station.save
redirect_to @station
end
def index
@stations = Station.all
end
private
def station_params
params.require(:station).permit(:name, adresses_attributes: [ :url ])
end
end
Station: new.html.erb
<%= form_for :station, url: stations_path do |station| %>
<p>
<%= station.label :name %><br />
<%= station.text_field :name %>
</p>
<%= station.fields_for :adresses do |adress| %>
<div class="field">
<p>
<%= adress.label :url %><br />
<%= adress.text_field :url %>
</p>
</div>
<% end %>
<p>
<%= station.submit %>
</p>
<% end %>
[edit]
I constructed a minimal example of this problem and documented it as a step-by-step instruction here: https://groups.google.com/forum/#!topic/rubyonrails-talk/4RF_CFChua0
In Rails 4, you also need to permit the id
attribute for adresses
. Please do this:
def station_params
params.require(:station).permit(:name, adresses_attributes: [ :url, :id ])
end
I'm still trying to find the official documentation for this :(
You should use form_for @station
instead of form_for :station
(use an instance instead of a symbol).
Cheers
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