I GOT TWO PROBLEMS:
-I'm stuck with creating a project which includes nested attributes for :position
-I got it nearly working for editing the project details plus the :position attribute, but the fields_for :assigned_projects ads all the fields for all users who are assigned to the project.
I have 3 Models:
class User < ActiveRecord::Base
has_many :assigned_projects
has_many :projects, :through => :assigned_projects
has_many :created_projects, :class_name => "Project", :foreign_key => :creator_id
end
class Project < ActiveRecord::Base
belongs_to :user
has_many :assigned_projects
has_many :users, :through => :assigned_projects
belongs_to :creator, :class_name => "User", :foreign_key => :creator_id
attr_accessible :name, :controlled, :currency, :creator_id, :assigned_projects
accepts_nested_attributes_for :assigned_projects#, :allow_destroy => true
end
class AssignedProject < ActiveRecord::Base
belongs_to :user, class_name: "User"
belongs_to :project, class_name: "Project"
attr_accessible :project_id, :user_id, :position, :project, :user, :user_attributes
accepts_nested_attributes_for :user
end
Each User can create a Project and is the Projects.creator Each Project has_many Users through the join model Assigned_Project
Each User can have a different position in the project, so I want to save the :position in the join model AssignedProject.
if a user creates a Project, he should be able to edit the project attributes PLUS the :position attribute of the new join model.
Now the Form field for New.Project and Edit.Project
/project/new.htm.erb
<%= form_for( setup_new_project(@project) ) do |f| %>
<%= f.label :name %>
<%= f.text_field :name %>
<%= f.fields_for :assigned_projects do |ff| %>
<%= ff.label :position %>
<%= ff.text_field :position%>
<% end %>
<%= f.submit "Add Project", class: "" %>
<% end %>
/project/edit.htm.erb
<%= form_for( setup_project(current_project) ) do |f| %>
<%= f.label :name %>
<%= f.text_field :name %>
<%= f.fields_for :assigned_projects do |ff| %>
<%= ff.label :position %>
<%= ff.text_field :position%>
<% end %>
<%= f.submit "Update Project", class: "" %>
<% end %>
And I have the following setup methods as described in this article: http://www.sitepoint.com/complex-rails-forms-with-nested-attributes/
module FormHelper
def setup_project(project)
project.assigned_projects ||= AssignedProject.new
project
end
def setup_new_project(project)
project.assigned_project = AssignedProject.new
project
end
end
I hope the problem is clear enough.
for creating a new project the current error message is:
undefined method `assigned_project='
15: <%= render 'shared/user_sidebar_menu' %>
16:
17: <div class="span4 offset1">
18: <%= form_for( setup_new_project(@project) ) do |f| %>
19:
20: <%= render 'shared/error_messages', object: f.object %>
21:
UPDATE: added projects_controller.rb
projects_controller.rb
class ProjectsController < ApplicationController
def new
@project = Project.new
end
def create
@project = Project.new(params[:project])
@project.creator = current_user
if @project.save
current_user.assigned_projects.create(project: @project)
redirect_to current_user
else
render 'new'
end
end
end
Update setup_new_project
method as below:
def setup_new_project(project)
project.assigned_projects.build ## Updated this line
project
end
Use project.assigned_projects
(Notice plural) instead of project.assigned_project
(Notice singular WRONG).
User
and AssignedProject
model are in a 1-M
relationship. So, you get dynamic method assigned_projects=
(Notice plural), you are getting error as you called assigned_project=
(Notice singular) which does not exist.
UPDATE
undefined method each for <AssignedProject:0x007ff7aa55b528>
Use project.assigned_projects.build
instead of project.assigned_project = AssignedProject.new
.
UPDATE 2
You are approaching this incorrectly. The form helpers are totally not required. All you need to do is update the new
and create
actions as below:
def new
@project = Project.new
@project.assigned_projects.build
end
and update the form_for
in both new
and edit
view's as below:
<%= form_for(@project) do |f| %>