What type of relationship do I use?

I’m a bit unsure how to model a relationship in ActiveRecord. It’s a
“has many through” with nested attributes. I already asked on SO but no
luck so far. I would appreciate it if you could have a look and point me
in the right direction. Feel to answer here or there! The question is
here:

I won’t repeat myself, as the question does a good job of explaining,
but I want to create users through accounts, and model the relationship
through a relationship table.

if account have many user and user belongs_to account then this
accepts_nested_attributes_for is write in account model.
for more detail…see my github account
https://github.com/vishalsingh/multiple_upload_photo .download it.hope
this
will work for you.

On Sun, Mar 4, 2012 at 10:55 PM, Mohamad El-Husseini
<[email protected]

On 4 March 2012 17:25, Mohamad El-Husseini [email protected]
wrote:

I’m a bit unsure how to model a relationship in ActiveRecord. It’s a “has many
through” with nested attributes. I already asked on SO but no luck so far. I would
appreciate it if you could have a look and point me in the right direction. Feel
to answer here or there! The question is here:
http://stackoverflow.com/questions/9555888/what-active-record-association-do-i-use-in-this-scenario

I won’t repeat myself, as the question does a good job of explaining, but I want
to create users through accounts, and model the relationship through a
relationship table.

Better to repeat the question here. I cannot answer the questions
without quoting it here which would mean I would have to copy bits
from the link and paste them in here, which is too much effort. Also
many will not be bothered to take the time to go and look somewhere
else for your question.

Colin

Colin, I figured out most of it. But stayed stuck on a detail.

My app now has Account, User, and Role models. The Role model links the
Account and User models. User has_many roles, and has_many accounts
through
roles. User accepts_nested_properties for accounts.

Everything works except for setting an extra attribute on the Role
model.
The Role model has a role_type column that I want to set when the
records
are created. It keeps showing up blank though.

Basically, when the User and the Account objects are created, I want the
Role model that joins them to have “owner” in the role_type column. But
it’s showing up blank. I feel like I am mixing up “ownership” with
“roles”,
yet it seems natural to store the in the same table. I thought I could
use
inheritance to simplify it, but it’s causing more headaches. I can’t
change
the type column arbitrarily if I wanted to change the role of a use for
example.

My questions are: How do I set the role_type column? And is it stupid?
It
doesn’t seem like a good way to set up something meant to be secure in
such
a way.
Should I use inheritance instead and create separate associations for
each
role type?

Models:
class User < ActiveRecord::Base
attr_accessible :name, :email, :password, :password_confirmation,
:accounts, :accounts_attributes
has_many :roles
has_many :accounts, through: :roles
accepts_nested_attributes_for :accounts
end

class Account < ActiveRecord::Base
attr_accessible :title
has_many :roles
has_many :users, through: “roles”
end

class Role < ActiveRecord::Base
attr_accessible :account_id, :user_id, :role_type
belongs_to :account
belongs_to :user
end

Controller:
def new
@user = User.new
@role = @user.roles.build(role_type: “owner”)
@account = @user.accounts.build
end

def create
@user = User.new(params[:user])
if @user.save
redirect_to root_path
else
render ‘new’
end
end

View
<%= simple_form_for @user do |f| %>
<%= f.simple_fields_for :accounts do |account_form| %>
<%= account_form.input :title %>
<% end %>
<%= f.input :name %>
[snip]
<%= f.submit ‘Sign up’, class: ‘btn btn-primary’ %>
<% end %>

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