Multiple Level Nested Form Can't mass-assign protected attributes: - ruby-on-rails

Question

I'm having a huge problem here with Rails. The thing is, that I have 32 models that are associated with one main model.
The model is called Problem - each problem has a leveloneeffect, levelonecause, leveloneend, leveloneway.
Now each of the previous level, has another models associated with them like leveltwoeffect is associated with leveloneeffect and so on..
Each model is correctly associated with other and the form shows all the label and texfields correctly to submit; but when I do submit I get the following error:
Can't mass-assign protected attributes: levelonecause_id
app/controllers/problems_controller.rb:27:in `update'
Now in the controller I have the follow code in the 27 line
def update
#problem = Problem.find(params[:id])
#problem.update_attributes(params[:problem]) <--- LINE 27
flash[:notice] = "Programa editado correctamente."
redirect_to edit_problem_path(#problem)
end
Any ideas?
Here is my problemcontroller
def index
#problem = Problem.all
end
def new
#problem = Problem.new
end
def create
#problem = Problem.new(params[:problem])
#problem.user_id = current_user.id
#problem.save
flash[:notice] = "Prorgrama Creado."
redirect_to edit_problem_path(#problem)
end
def show
#problem = Problem.find(params[:id])
end
def edit
#problem = Problem.find(params[:id])
end
def update
#problem = Problem.find(params[:id])
#problem.update_attributes(params[:problem])
flash[:notice] = "Programa editado correctamente."
redirect_to edit_problem_path(#problem)
end
def destroy
#problem = Problem.find(params[:id])
#Problem.destroy
flash[:notice] = "Programa borrado correctamente."
redirect_to problems_path
end
end
Add here is the problem model
attr_accessible :leveltwocause_attributes,:indicator_attributes, :leveloneeffect_attributes, :levelonecause_attributes, :budget_program, :city, :department, :email, :name, :responsable_unit, :init_date, :end_date, :organism, :definition, :idea_attributes
belongs_to :user
has_many :idea
has_many :levelonecause
has_many :leveltwocause, :through => :levelonecause
has_many :levelthreecause, :through => :leveltwocause
has_many :levelfourcause, :through => :levelthreecause
has_many :levelfivecause, :through => :levelfourcause
has_many :levelsixcause, :through => :levelfivecause
has_many :levelsevencause, :through => :levelsixcause
has_many :leveleightcause, :through => :levelsevencause
has_many :indicator
has_many :leveloneeffect
has_many :leveltwoeffect, :through => :leveloneeffect
has_many :levelthreeeffect, :through => :leveltwoeffect
has_many :levelfoureffect, :through => :levelthreeeffect
has_many :levelfiveeffect, :through => :levelfoureffect
has_many :levelsixeffect, :through => :levelfiveeffect
has_many :levelseveneffect, :through => :levelsixeffect
has_many :leveleighteffect, :through => :levelseveneffect
accepts_nested_attributes_for :idea, :allow_destroy => true
accepts_nested_attributes_for :levelonecause, :allow_destroy => true
accepts_nested_attributes_for :leveltwocause, :allow_destroy => true
accepts_nested_attributes_for :levelthreecause, :allow_destroy => true
accepts_nested_attributes_for :levelfourcause, :allow_destroy => true
accepts_nested_attributes_for :levelfivecause, :allow_destroy => true
accepts_nested_attributes_for :levelsixcause, :allow_destroy => true
accepts_nested_attributes_for :levelsevencause, :allow_destroy => true
accepts_nested_attributes_for :leveleightcause, :allow_destroy => true
accepts_nested_attributes_for :leveloneeffect, :allow_destroy => true
accepts_nested_attributes_for :leveltwoeffect, :allow_destroy => true
accepts_nested_attributes_for :levelthreeeffect, :allow_destroy => true
accepts_nested_attributes_for :levelfoureffect, :allow_destroy => true
accepts_nested_attributes_for :levelfiveeffect, :allow_destroy => true
accepts_nested_attributes_for :levelsixeffect, :allow_destroy => true
accepts_nested_attributes_for :levelseveneffect, :allow_destroy => true
accepts_nested_attributes_for :leveleighteffect, :allow_destroy => true
accepts_nested_attributes_for :indicator, :allow_destroy => true
end
Here is the form
<%= simple_nested_form_for #problem, :html => { :class => " widgetbox box-inverse form-horizontal" } do |f| %>
<div class="tabbable"> <!-- Only required for left/right tabs -->
<ul class="nav nav-pills">
<li class="active">Definicion del Problema</li>
<li>Arbol del Problema</li>
<li>Arbol de Objetivos</li>
<li>Matriz Marco Logico</li>
</ul>
<div class="tab-content">
<div class="tab-pane fade in active" id="definicion">
<ul class="nav nav-tabs">
<li>Informacion Basica</li>
<li>Definicion del Problema</li>
<li>Lluvia de Ideas</li>
</ul>
<div class="tab-content">
<div class="tab-pane fade" id="infbasica">
<div class="span4 offset1">
<%= f.input :name, label: 'Nombre del Programa' %>
<%= f.input :organism, label: 'Dependencia', collection: ["Dependencia 1", "Dependencia 2", "Dependencia 3"] %>
<%= f.input :responsable_unit, label: 'Nombre del Responsable del Programa' %>
<%= f.input :city, label: 'Ciudad', collection: [ "Chihuahua", "DF", "Toluca", "Juarez"] %>
<%= f.input :department, label: 'Departamento', :collection => [ "Direccion Tecnica", "Proyectos Especiales", "Sub Direccion de Estudios"] %>
<%= f.input :email, label: 'Correo Electronico', placeholder: 'usuario#correo.com' %>
</div>
<div class="span4 offset1">
<%= f.input :init_date, label: 'Fecha problable de Inicio'%>
<%= f.input :end_date, label: 'Fecha problable de Terminacion' %>
</div>
</div>
<div class="tab-pane fade" id="nombrar">
<div class="span6 offset1">
<%= f.input :definition, label: 'Definicion del Problema', as: :text %>
</div>
</div>
<div class="tab-pane fade" id="lluvia">
<div class="span6 offset1">
<%= f.simple_fields_for :idea do |i| %>
<%= i.input :content, label: 'Idea', as: :text, required: false %>
<%= i.link_to_remove "Quitar", :class => 'btn btn-danger' %>
<% end %>
<%= f.link_to_add "Agregar Idea", :idea %>
</div>
</div>
</div>
</div>
<div class="tab-pane fade" id="arbolproblema">
<ul class="nav nav-tabs">
<li>Causas</li>
<li>Efectos</li>
<li>Generar Diagrama</li>
</ul>
<div class="tab-content">
<div class="tab-pane" id="causas">
<div class="span6 offset1">
<%= f.simple_fields_for :levelonecause do |levelone| %>
<%= levelone.input :content, label: 'Causa', as: :text, required: false %>
<%= levelone.link_to_remove "Quitar", :class => 'btn btn-danger' %>
<% end %>
<%= f.link_to_add "Agregar Causa del nivel 1", :levelonecause %>
</div>
</div>
<div class="tab-pane" id="efectos">
<div class="span6 offset1">
<%= f.simple_fields_for :leveltwocause do |leveltwocause| %>
<%= leveltwocause.input :content, label: 'Efect', as: :text, required: false %>
<%= leveltwocause.link_to_remove "Quitar", :class => 'btn btn-danger' %>
<%= leveltwocause.label :levelonecause_id, "Efecto" %>
<%= leveltwocause.collection_select(:levelonecause_id, Levelonecause.all, :id, :content) %>
<% end %>
<%= f.link_to_add "Agregar Efecto del nivel 1", :leveltwocause %>
</div>
</div>
</div>
</div>
</div>
<%= f.button :submit, 'Guardar Datos', class: 'btn btn-primary pull-right' %>
<% end %>
</div>
EDIT
OK guys i removed the trough in my model and it works! does anyone knows why?
This new Rails version is killing me

Answer 1

Try to add :levelonecause_id to attr_accessible list of levelonecause model and the other models that has it too.