How do I use accepts_nested_attributes_for?
- by Angela
Editing my question for conciseness and to update what I've done:
How do I model having multiple Addresses for a Company and assign a single Address to a Contact, and be able to assign them when creating or editing a Contact?
I want to use nested attributes to be able to add an address at the time of creating a new contact. That address exists as its own model because I may want the option to drop-down from existing addresses rather than entering from scratch.
I can't seem to get it to work. I get a undefined method `build' for nil:NilClass error
Here is my model for Contacts:
class Contact < ActiveRecord::Base
attr_accessible :first_name, :last_name, :title, :phone, :fax, :email, :company,
:date_entered, :campaign_id, :company_name, :address_id, :address_attributes
belongs_to :company
belongs_to :address
accepts_nested_attributes_for :address
end
Here is my model for Address:
class Address < ActiveRecord::Base
attr_accessible :street1, :street2, :city, :state, :zip
has_many :contacts
end
I would like, when creating an new contact, access all the Addresses that belong to the other Contacts that belong to the Company. So here is how I represent Company:
class Company < ActiveRecord::Base
attr_accessible :name, :phone, :addresses
has_many :contacts
has_many :addresses, :through => :contacts
end
Here is how I am trying to create a field in the View for _form for Contact so that, when someone creates a new Contact, they pass the address to the Address model and associate that address to the Contact:
<% f.fields_for :address, @contact.address do |builder| %>
<p>
<%= builder.label :street1, "Street 1" %> </br>
<%= builder.text_field :street1 %>
<p>
<% end %>
When I try to Edit, the field for Street 1 is blank. And I don't know how to display the value from show.html.erb.
At the bottom is my error console -- can't seem to create values in the address table:
My Contacts controller is as follows:
def new
@contact = Contact.new
@contact.address.build # Iundefined method `build' for nil:NilClass
@contact.date_entered = Date.today
@campaigns = Campaign.find(:all, :order => "name")
if params[:campaign_id].blank?
else
@campaign = Campaign.find(params[:campaign_id])
@contact.campaign_id = @campaign.id
end
if params[:company_id].blank?
else
@company = Company.find(params[:company_id])
@contact.company_name = @company.name
end
end
def create
@contact = Contact.new(params[:contact])
if @contact.save
flash[:notice] = "Successfully created contact."
redirect_to @contact
else
render :action => 'new'
end
end
def edit
@contact = Contact.find(params[:id])
@campaigns = Campaign.find(:all, :order => "name")
end
Here is a snippet of my error console:
I am POSTING the attribute, but it is not CREATING in the Address table....
Processing ContactsController#create
(for 127.0.0.1 at 2010-05-12 21:16:17)
[POST] Parameters:
{"commit"="Submit",
"authenticity_token"="d8/gx0zy0Vgg6ghfcbAYL0YtGjYIUC2b1aG+dDKjuSs=",
"contact"={"company_name"="Allyforce",
"title"="", "campaign_id"="2",
"address_attributes"={"street1"="abc"},
"fax"="", "phone"="",
"last_name"="",
"date_entered"="2010-05-12",
"email"="", "first_name"="abc"}}
Company Load (0.0ms)[0m [0mSELECT
* FROM "companies" WHERE ("companies"."name" = 'Allyforce')
LIMIT 1[0m
Address Create (16.0ms)[0m
[0;1mINSERT INTO "addresses" ("city",
"zip", "created_at", "street1",
"updated_at", "street2", "state")
VALUES(NULL, NULL, '2010-05-13
04:16:18', NULL, '2010-05-13
04:16:18', NULL, NULL)[0m
Contact Create (0.0ms)[0m
[0mINSERT INTO "contacts" ("company",
"created_at", "title", "updated_at",
"campaign_id", "address_id",
"last_name", "phone", "fax",
"company_id", "date_entered",
"first_name", "email") VALUES(NULL,
'2010-05-13 04:16:18', '', '2010-05-13
04:16:18', 2, 2, '', '', '', 5,
'2010-05-12', 'abc', '')[0m
