Nested has_many attributes (Ruby on Rails) throwing errors - ruby-on-rails

Question

So this may be somewhat related to my question that I asked earlier, so here is a link to it, just in case.
So, currently I'm getting the error undefined method 'location' for #<Block:0x6503478>.
I've already gotten the has_one relation for cue working, but what seems to be the problem is the has_many relations with block_block and block_character.
The parameters being passed are:
{"utf8"=>"✓",
"authenticity_token"=>"blahblahblah",
"block"=>{"block_code"=>"1",
"block_duration"=>"",
"cue"=>"no",
"cue_attributes"=>{"cue_code"=>"",
"cue_type_code"=>"",
"cue_description"=>"",
"cue_method_code"=>""},
"location_code"=>"1",
"scene_code"=>"1",
"block_description"=>"",
"block_block"=>{"block_block_code"=>"",
"primary_block_code"=>"",
"secondary_block_code"=>"",
"block_block_start"=>""},
"block_character"=>{"block_character_code"=>"",
"character_code"=>"",
"block_code"=>"",
"character_action"=>"",
"character_motivation"=>""}},
"blockblock"=>{"block"=>"no"},
"blockblockdirect"=>{"blockdirect"=>"before"},
"blockchar"=>{"character"=>"no"},
"commit"=>"Create Block"}
Here is my form for block (views/block/_form.html.erb):
<%= form_for(#block) do |f| %>
<% if #block.errors.any? %>
<div id="error_explanation">
<h2><%= pluralize(#block.errors.count, "error") %> prohibited this block from being saved:</h2>
<ul>
<% #block.errors.full_messages.each do |message| %>
<li><%= message %></li>
<% end %>
</ul>
</div>
<% end %>
<div class="field hidden">
<%= f.label :block_code, class: "hidden" %><br>
<%= f.text_field :block_code, class: "form-control hidden" %>
</div>
<div class="field">
<%= f.label :block_duration %><br>
<div class="input-group">
<%= f.number_field :block_duration, class: 'text_field form-control', :step => 'any' %>
<div class="input-group-addon">seconds</div>
</div>
</div>
<div class="field">
<%= label "cue", "Does this block have a cue associated with it?" %>
<!-- Add whether it is specific/generic cue -->
<%= radio_button_tag "block[cue]", "yes", false %> Yes
<%= radio_button_tag "block[cue]", "no", true %> No
<div class="field" id="cue_fields" style="display:none;">
<%= f.fields_for :cue, #block.build_cue do |ff| %>
<div class="field hidden">
<%= ff.label :cue_code, class: "hidden" %><br>
<%= ff.text_field :cue_code, class: "hidden" %>
</div>
<div class="field">
<%= ff.label "Cue Type" %><br>
<%= ff.collection_select(:cue_type_code, CueType.all, :cue_type_code, :cue_type_name, {prompt: "Select a cue type..."}, {class: "form-control"}) %>
</div>
<div class="field">
<%= ff.label "Cue Description" %><br>
<%= ff.text_area :cue_description, class: "form-control" %>
</div>
<div class="field">
<%= ff.label "Cue Method" %><br>
<%= ff.collection_select( :cue_method_code, CueMethod.all, :cue_method_code, :cue_method_name, {prompt: "Select a cue method..."}, {class: "form-control"}) %>
</div>
<% end %>
</div>
</div>
<div class="field">
<%= f.label "Location" %><br>
<%= collection_select :block, :location_code, Location.all, :location_code, :location_name, {prompt: "Select a location..."}, {class: "form-control", required: true} %>
</div>
<div class="field">
<%= f.label "Scene" %><br>
<%= f.collection_select :scene_code, Scene.all, :scene_code, :actAndScene, {prompt: "Select a scene..."}, {class: "form-control", required: true} %>
</div>
<div class="field">
<%= f.label "Block Description" %><br>
<%= f.text_area :block_description, class: "form-control" %>
</div>
<!-- This needs work -->
<div class="field">
<%= label "blockblock", "Is this block associated with any other blocks?" %>
<%= radio_button_tag "blockblock[block]", "yes", false %> Yes
<%= radio_button_tag "blockblock[block]", "no", true %> No
<div class="field" id="blockblock_fields" style="display:none;">
<ol>
<li>
<%= label "blockdirect", "Does this block come directly before or after another block?" %>
<%= radio_button_tag "blockblockdirect[blockdirect]", "before", true %> Before
<%= radio_button_tag "blockblockdirect[blockdirect]", "after", false %> After
<%= f.fields_for :block_block do |gg| %>
<div class="field hidden">
<%= gg.label :block_block_code, class: 'hidden' %><br>
<%= gg.text_field :block_block_code, class: 'hidden' %>
</div>
<div class="field" id="blockblock_after_fields" style="display:none;">
<%= gg.label "Primary Block Code" %><br>
<%= gg.text_field :primary_block_code, class: 'form-control' %>
</div>
<div class="field" id="blockblock_before_fields">
<%= gg.label "Secondary Block Code" %><br>
<%= gg.text_field :secondary_block_code, class: 'form-control' %>
</div>
<div class="field">
<%= gg.label "Block Start" %><br>
<p><i>This field indicates the amount of time after the first block starts that the second block should begin, i.e. if you type "1" here, then the second block will start 1 second after the first block starts</i></p>
<div class="input-group">
<%= gg.number_field :block_block_start, class: 'text_field form-control', :step => 'any' %>
<div class="input-group-addon">seconds</div>
</div>
</div>
<% end %>
</li>
</ol>
</div>
</div>
<!-- This needs work -->
<div class="field">
<%= label "character", "Are any characters associated with this block?" %>
<%= radio_button_tag "blockchar[character]", "yes", false %> Yes
<%= radio_button_tag "blockchar[character]", "no", true %> No
<div class="field" id="character_fields" style="display:none;">
<ol>
<%= f.fields_for :block_character do |hh| %>
<li>
<div class="field hidden">
<%= hh.label :block_character_code, class: 'hidden' %><br>
<%= hh.text_field :block_character_code, class: 'hidden' %>
</div>
<div class="field">
<%= hh.label "Character" %><br>
<%= hh.collection_select :character_code, Character.all, :character_code, :character_name, {prompt: "Select a character..."}, {class: "form-control"} %>
</div>
<div class="field hidden">
<%= hh.label :block_code, class: 'hidden' %><br>
<%= hh.text_field :block_code, class: 'hidden' %>
</div>
<div class="field">
<%= hh.label :character_action %><br>
<%= hh.text_field :character_action, class: 'form-control' %>
</div>
<div class="field">
<%= hh.label :character_motivation %><br>
<%= hh.text_area :character_motivation, class: 'form-control' %>
</div>
</li>
<% end %>
</ol>
</div>
</div>
<div class="actions">
<%= f.submit "Create Block", class: "btn btn-primary" %>
</div>
<% end %>
Additionally, here are the models associated with block, block_character, and block_block, respectively:
class Block < ActiveRecord::Base
validates_presence_of :location
validates_presence_of :scene
has_one :cue
has_many :block_blocks
has_many :block_characters
accepts_nested_attributes_for :cue, allow_destroy: true
accepts_nested_attributes_for :block_blocks, allow_destroy: true
accepts_nested_attributes_for :block_characters, allow_destroy: true
attr_accessor :block_blocks
attr_accessor :block_characters
end
class BlockBlock < ActiveRecord::Base
belongs_to :block
end
class BlockCharacter < ActiveRecord::Base
belongs_to :block
end
Here is the controller for block:
class BlocksController < ApplicationController
before_action :set_block, only: [:show, :edit, :update, :destroy]
# GET /blocks
# GET /blocks.json
def index
#blocks = Block.all
end
# GET /blocks/1
# GET /blocks/1.json
def show
end
# GET /blocks/new
def new
#block = Block.new
# Set block code as next integer after max block code.
#block.block_code = (Block.maximum(:block_code).to_i.next).to_s(2)
end
# GET /blocks/1/edit
def edit
end
# POST /blocks
# POST /blocks.json
def create
#block = Block.new(block_params)
respond_to do |format|
if #block.save
format.html { redirect_to #block, notice: 'Block was successfully created.' }
format.json { render :show, status: :created, location: #block }
else
format.html { render :new }
format.json { render json: #block.errors, status: :unprocessable_entity }
end
end
end
# PATCH/PUT /blocks/1
# PATCH/PUT /blocks/1.json
def update
respond_to do |format|
if #block.update(block_params)
format.html { redirect_to #block, notice: 'Block was successfully updated.' }
format.json { render :show, status: :ok, location: #block }
else
format.html { render :edit }
format.json { render json: #block.errors, status: :unprocessable_entity }
end
end
end
# DELETE /blocks/1
# DELETE /blocks/1.json
def destroy
#block.destroy
respond_to do |format|
format.html { redirect_to blocks_url, notice: 'Block was successfully destroyed.' }
format.json { head :no_content }
end
end
private
# Use callbacks to share common setup or constraints between actions.
def set_block
#block = Block.find(params[:id])
end
# Never trust parameters from the scary internet, only allow the white list through.
def block_params
params.require(:block).permit(:block_code, :block_duration, :cue_code, :location_code, :scene_code, :block_description, :cue_attributes => [:id, :cue_code, :cue_type_code, :cue_description, :cue_method_code], :block_block_attributes => [:id, :block_block_code, :primary_block_code, :secondary_block_code, :block_block_start], :block_character_attributes => [:id, :block_character_code, :character_code, :block_code, :character_action, :character_motivation])
end
end
And finally, the migrations I added for id and foreign_key for both block_block and block_character:
class AddBelongsToToBlockBlocks < ActiveRecord::Migration
def change
add_reference :block_blocks, :block, index: true
add_foreign_key :block_blocks, :blocks
end
end
class AddBelongsToToBlockCharacters < ActiveRecord::Migration
def change
add_reference :block_characters, :block, index: true
add_foreign_key :block_characters, :blocks
end
end
Honestly, thank you all so much for your help through this, I am by no means an advanced Rails user and this has all been amazingly helpful. Please let me know if you need any more information!
UPDATE 1
So I changed the following in block.rb (the model file), as suggested by Vijay (thanks so much!!!):
class Block < ActiveRecord::Base
validates_presence_of :location_code
validates_presence_of :scene_code
has_one :cue
has_many :block_blocks
has_many :block_characters
accepts_nested_attributes_for :cue, allow_destroy: true
accepts_nested_attributes_for :block_blocks, allow_destroy: true
accepts_nested_attributes_for :block_characters, allow_destroy: true
attr_accessor :block_blocks
attr_accessor :block_characters
end
At this point, the block saves (and appears in the index view), but the block_block and block_character do not do so. There is no associated error however...
UPDATE 2
This is currently what the params submitted look like:
Which is odd because it says that cue, block_block, and block_character are unpermitted parameters, even though, in the controller they are:
def block_params
params.require(:block).permit(:block_code, :block_duration, :cue_code, :location_code, :scene_code, :block_description, :cue_attributes => [:id, :cue_code, :cue_type_code, :cue_description, :cue_method_code], :block_block_attributes => [:id, :block_block_code, :primary_block_code, :secondary_block_code, :block_block_start], :block_character_attributes => [:id, :block_character_code, :character_code, :block_code, :character_action, :character_motivation])
end

Answer 1

Are you triggering the error in the validation?
validates_presence_of :location
From your code it looks like it should be
validates_presence_of :location_code

Answer 2

Not sure why you've added these in Rails 4
attr_accessor :block_blocks
attr_accessor :block_characters
Try removing them and see if they are interfering with the controller (I'm guessing, but happy to play if you put up a jsfiddle)