I didn't find anything related to my problem. I have these models:
class Meal < ActiveRecord::Base
has_many :meal_ingredients
has_many :ingredients, through: :meal_ingredients
accepts_nested_attributes_for :ingredients, :reject_if => :all_blank, :allow_destroy => true
accepts_nested_attributes_for :meal_ingredients
end
class Ingredient < ActiveRecord::Base
has_many :meal_ingredients
has_many :meals, through: :meal_ingredients
end
class MealIngredient < ActiveRecord::Base
belongs_to :meal
belongs_to :ingredient
end
In the meal_ingredient model I have a quantity column and I want to let the user set this quantity when creating a new meal with many ingredients. To allow that, I used the cocoon gem. And that's when the problem comes: I must set the ingredient_id and the meal_id to build the association with the quantity but I just hit the database when submiting the "Create Meal" buttom.
Part of the solution I thought is creating a fields_forinside the form and set an instance variable in the controller.
But how can I get these ids? I'm stuck.
class MealsController < ApplicationController
before_action :set_meal, only: [:edit, :update, :show]
autocomplete :ingredients, :name
def index
@meals = Meal.order(updated_at: :desc).paginate(:page => params[:page], :per_page => 4)
end
def show
end
def new
@meal = Meal.new
@qtd = MealIngredient.new
end
def create
@meal = Meal.new(meal_params)
@qtd = @meal.ingredients.map{|r| MealIngredient.new(quantity: params[:quantity], ingredient_id: r.id, meal_id: @meal)}
if @meal.save
flash[:success] = "Refeição criada com sucesso!"
redirect_to meals_path
else
render :new
end
end
def edit
end
def update
if @meal.update(meal_params)
flash[:success] = "Your meal was updated succesfully!"
redirect_to meal_path(@meal)
else
render :edit
end
end
private
def meal_params
params.require(:meal).permit(:name, :picture, ingredients_attributes: [:name, :unit, :carb, :prot, :fat])
end
def set_meal
@meal = Meal.find(params[:id])
end
end
This is what I got so far... I don't think the main problem is being caused by cocoon gem. I think it's about concepts...
The params
Parameters: {"utf8"=>"✓", "authenticity_token"=>"dTYOiz8+pwNfwt432qhy7Yuj0hSVksj0bsTzxp8vD6QaupIJueSO1ASDkwiOB92qCiLO33Ke61aUBGbyvGZJfA==", "meal"=>{"name"=>"tests", "ingredients_attributes"=>{"1449471543091"=>{"name"=>"uva", "unit"=>"und", "carb"=>"1", "prot"=>"1", "fat"=>"1", "_destroy"=>"false"}}}, "meal_ingredient"=>{"quantity"=>"14"}, "commit"=>"Create Meal"}
View _form.html.erb
<div class = "row">
<div class= "col-md-10 col-md-offset-1">
<%= simple_form_for(@meal) do |f| %>
<%= f.error_notification %>
<div class="form-inputs">
<%= f.input :name %>
</div>
<h3>ingredientes</h3>
<div id="ingredients">
<%= f.simple_fields_for :ingredients do |ingredient| %>
<%= render "ingredient_fields", :f => ingredient %>
<% end %>
</div>
<div class="form-actions">
<div><%= link_to_add_association 'adicionar ingrediente', f, :ingredients, :class => "btn btn-default" %></div>
<div><%= f.button :submit, class: "btn btn-success" %></div>
</div>
<% end %>
</div>
</div>
_ingredient_fields.html.erb
<%= render 'shared/errors', obj: @meal %>
<div class = "nested-fields">
<table class= "table">
<thead>
<tr>
<td>
<%= f.label "Nome" %>
</td>
<td>
<%= f.label "Unidade" %>
</td>
<td>
<%= f.label "Carbo" %>
</td>
<td>
<%= f.label "Prot" %>
</td>
<td>
<%= f.label "Gordura" %>
</td>
<td>
<%= f.label "Quantidade" %>
</td>
<td>
<%= f.label "kcal" %>
</td>
</tr>
</thead>
<tbody>
<tr>
<td scope="row" class="col-md-4">
<%= f.text_field :name, required: true, class: "form-control" %>
</td>
<td class="col-md-2">
<%= f.text_field :unit, required: true, class: "form-control" %>
</td>
<td class="col-md-1">
<%= f.text_field :carb, required: true, :pattern => '^\d+(\.\d+)*$', title: "Apenas números separados por pontos", class: "form-control" %>
</td>
<td class="col-md-1">
<%= f.text_field :prot, required: true, :pattern => '^\d+(\.\d+)*$', title: "Apenas números separados por pontos", class: "form-control" %>
</td>
<td class="col-md-1">
<%= f.text_field :fat, required: true, :pattern => '^\d+(\.\d+)*$', title: "Apenas números separados por pontos", class: "form-control" %>
</td>
<td class="col-md-1">
<%= fields_for @qtd do |f| %>
<%= f.hidden_field :ingredient_id %>
<%= f.number_field :quantity, required: true, :pattern => '^\d+(\.\d+)*$', title: "Apenas números separados por pontos", class: "form-control" %>
<% end %>
</td>
<td class="col-md-1">
</td>
<td class="col-md-1">
<%= link_to_remove_association "remove item", f, :class => "btn btn-danger" %>
</td>
</tr>
</tbody>
</table>
</div>
Following this tutorial and looking at the cocoon's demo app. It was easy to solve my problem, although I actually don't know exactly what I did here the
<%= link_to_add_association 'adicionar ingrediente', f, :meal_ingredients, 'data-association-insertion-node' => "#ingredients ol", 'data-association-insertion-method' => "append", :wrap_object => Proc.new {|quantity| quantity.build_ingredient; quantity }, :class => "btn btn-default" %>
I hate coding this way but this time I just went with the flow very carefully...
If someone has already used cocoon for that purpose and can explain better I - and the community - would appreciate :D
Changes made:
Model
class MealIngredient < ActiveRecord::Base
belongs_to :meal
belongs_to :ingredient
accepts_nested_attributes_for :ingredient, :reject_if => :all_blank
end
Controller
class MealsController < ApplicationController
before_action :set_meal, only: [:edit, :update, :show]
autocomplete :ingredients, :name
def index
@meals = Meal.order(updated_at: :desc).paginate(:page => params[:page], :per_page => 4)
end
def show
end
def new
@meal = Meal.new
end
def create
@meal = Meal.new(meal_params)
if @meal.save
flash[:success] = "Refeição criada com sucesso!"
redirect_to meals_path
else
render :new
end
end
def edit
end
def update
if @meal.update(meal_params)
flash[:success] = "Your meal was updated succesfully!"
redirect_to meal_path(@meal)
else
render :edit
end
end
private
def meal_params
params.require(:meal).permit(:name, :picture, :tcarb, :tprot, :tfat, :tkcal, meal_ingredients_attributes: [:quantity, ingredient_attributes: [:id, :name, :unit, :carb, :prot, :fat, :_destroy]])
end
def set_meal
@meal = Meal.find(params[:id])
end
end
Views
_form.html.erb
<div class = "row">
<div class= "col-md-10 col-md-offset-1">
<%= simple_form_for(@meal) do |f| %>
<%= f.error_notification %>
<div class="form-inputs">
<%= f.input :name %>
</div>
<h3>ingredientes</h3>
<fieldset id="ingredients">
<ol>
<%= f.fields_for :meal_ingredients do |meal_ingredient| %>
<%= render "meal_ingredient_fields", :f => meal_ingredient %>
<% end %>
</ol>
<div class="form-actions">
<div><%= link_to_add_association 'adicionar ingrediente', f, :meal_ingredients, 'data-association-insertion-node' => "#ingredients ol", 'data-association-insertion-method' => "append", :wrap_object => Proc.new {|quantity| quantity.build_ingredient; quantity }, :class => "btn btn-default" %></div>
</div>
</fieldset>
<div class="form-actions">
<div><%= f.button :submit, class: "btn btn-success" %></div>
</div>
<% end %>
</div>
</div>
_meal_ingredient_fields.html.erb
<div class = "nested-fields">
<table class= "table">
<thead>
<tr>
<td>
<%= f.label "Nome" %>
</td>
<td>
<%= f.label "Unidade" %>
</td>
<td>
<%= f.label "Carbo" %>
</td>
<td>
<%= f.label "Prot" %>
</td>
<td>
<%= f.label "Gordura" %>
</td>
<td>
<%= f.label "Quantidade" %>
</td>
<td>
<%= f.label "kcal" %>
</td>
</tr>
</thead>
<tbody>
<tr>
<%= f.fields_for :ingredient do |fi| %>
<td scope="row" class="col-md-4">
<%= fi.text_field :name, required: true, class: "form-control" %>
</td>
<td class="col-md-2">
<%= fi.text_field :unit, required: true, class: "form-control" %>
</td>
<td class="col-md-1">
<%= fi.text_field :carb, required: true, :pattern => '^\d+(\.\d+)*$', title: "Apenas números separados por pontos", class: "form-control" %>
</td>
<td class="col-md-1">
<%= fi.text_field :prot, required: true, :pattern => '^\d+(\.\d+)*$', title: "Apenas números separados por pontos", class: "form-control" %>
</td>
<td class="col-md-1">
<%= fi.text_field :fat, required: true, :pattern => '^\d+(\.\d+)*$', title: "Apenas números separados por pontos", class: "form-control" %>
</td>
<% end %>
<td class="col-md-1">
<%= f.number_field :quantity, required: true, :pattern => '^\d+(\.\d+)*$', title: "Apenas números separados por pontos", class: "form-control" %>
</td>
<td class="col-md-1">
</td>
<td class="col-md-1">
<%= link_to_remove_association "remove item", f, :class => "btn btn-danger" %>
</td>
</tr>
</tbody>
</table>
</div>