id nil has_many :through but in parameters exist :id - ruby-on-rails

Question

I have 3 models with has_many :through relation. Users, Events, and Galleries. In the method new and create in gallery_controller I need to get the event_id, however I get a nil event_id. But in the mozilla console and in the parameters, there exists the id. I don't what I am doing wrong?
I also want to know if the structure of new and create actions is ok ? I want add a gallery for a event before created and in the same time in the the current_user galleries, i have not can test it by the previous problem.
Thanks and cheers.
class Event < ActiveRecord::Base
has_many: galleries
has_many: users, through: : galleries, : source => : users, : dependent => : destroy
accepts_nested_attributes_for: users
accepts_nested_attributes_for: galleries
end
class User < ActiveRecord::Base
has_many :galleries
has_many :events, through: :galleries, :dependent => :destroy
accepts_nested_attributes_for :events
accepts_nested_attributes_for :galleriesenter code here
end
class Gallery < ActiveRecord::Base
has_many :pictures, :dependent => :destroy
belongs_to :event
belongs_to :user
end
Gallery_controller
def new
#event = Event.find(params[:event_id])
#galery = Gallery.new
respond_to do |format |
format.html# new.html.erb
format.json {
render json: #gallery
}
end
end
def create
#event = Event.find(params[:id])
#gallery = #event.galleries.build(params[:gallery])
#gallery.user = current_user
respond_to do |format |
if# gallery.save
if params[: images]# The magic is here;)
params[: images].each { | image | #gallery.pictures.create(image: image)
}
end
def gallery_params
params.require(:gallery).permit(:description,
:name,
:pictures,
:event_attributes => [],
:user_attributes => [],
)
end
form_ new gallery
<%= form_for [#event,#gallery], :html => { :class => 'form-horizontal', multipart: true } do |f| %>
<div class="control-group">
<%= f.label :name, :class => 'control-label' %>
<div class="controls">
<%= f.text_field :name, :class => 'text_field' %>
</div>
</div>
<div class="control-group">
<%= f.label :description, :class => 'control-label' %>
<div class="controls">
<%= f.text_field :description, :class => 'text_field' %>
</div>
</div>
<div class="control-group">
<%= f.label :pictures, :class => 'control-label' %>
<div class="controls">
<%= file_field_tag "images[]", type: :file, multiple: true %>
</div>
</div>
<div class="form-actions">
<%= f.submit :class => 'btn btn-primary' %>
<%= link_to t('.cancel', :default => t("helpers.links.cancel")),
galleries_path, :class => 'btn btn-mini' %>
</div>
<% end %>
routes
resources :events do
resources :galleries
end
Image error
http://i.stack.imgur.com/mk1Ti.png

Answer 1

The error is because you have a typo in your new method.
This line
#galery = Gallery.new
should be
#gallery = Gallery.new
Furthermore your create method has some mistakes which needs fixing.
def create
#event = Event.find(params[:event_id])
#gallery = #event.galleries.build(gallery_params)
#gallery.user = current_user
respond_to do |format|
if #gallery.save
if params[:images]
params[:images].each { |image| #gallery.pictures.create(image: image)}
end
format.html { redirect_to #gallery, notice: 'Gallery was successfully created.' }
format.json { render json: #gallery, status: :created, location: #gallery }
else
format.html { render :new }
format.json { render json: #gallery.errors, status: :unprocessable_entity }
end
end
end
And also your gallery_params needs tweaking
def gallery_params
params.require(:gallery).permit(:description,:name)
end
You don't want to include :event_attributes => [], :user_attributes => [] unless your form has nested fields for users and events which needs to be saved.

Answer 2

I think I found your problem. To me there seems more problems. But initially to solve your problem: you need add event_id to permit params methods:
params.require(:gallery).permit(:description,
:name,
:pictures,
:event_id, # this line should be here if your foreign key is event_id for gallery model.
:event_attributes => [],
:user_attributes => [],
)
Also your form doesn't content the right instance variable. Differences here:
<%= form_for [#event,#gallery], :html => { :class => 'form-horizontal', multipart: t # you wrote #gallery here but in your controller you wrote:
# controller's action:
#galery = Gallery.new
Suggested way to keep the foreign key hidden as well as you build from events also:
#event = Event.find(params[:event_id])
#gallery = #event.gallaries.build #note: 1.spelling and 2. building from #event object
Then in your form add the foreign key field as hidden:
<%= f.hidden_field :event_id %>