加入table个数量带茧（has_many个通过）
Join table Quantity with cocoon (has_many through)
我没有找到与我的问题相关的任何内容。
我有这些型号：
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
在 meal_ingredient 模型中，我有一个 数量 列，我想让用户在创建包含许多成分的新餐时设置此数量。为此，我使用了 cocoon gem。这就是问题来的时候：我必须设置 ingredient_id 和 meal_id 来建立与数量的关联，但我只是在提交 "Create Meal" 按钮时访问了数据库。
我认为的部分解决方案是在表单中创建一个 fields_for 并在控制器中设置一个实例变量。
但是我怎样才能得到这些ID？我卡住了。
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
这是我目前得到的...我不认为主要问题是由茧引起的 gem。我认为这是关于概念的...
参数
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"}
查看
_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>
我也用过 cocoon，但在设置时遇到了一些麻烦。我认为你必须意识到 Rails 比你想象的更聪明。您可以轻松地在参数字符串上调用保存。只要确保所有参数都被接受。例如，您还需要 :id 表示 ingredients_attributes（以及 :_destroy，如果您也允许删除）。哦，还有为你的加入 table 松开 nested_attributes。
我认为这样的事情应该可行：
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
private
def meal_params
params.require(:meal).permit(:name, :picture, ingredients_attributes: [:id, :name, :unit, :carb, :prot, :fat, :_destroy])
end
如果没有，请post您包含主要形式和部分形式的视图。
正在关注 this tutorial and looking at the cocoon's demo 个应用。很容易解决我的问题，虽然我实际上并不知道我在这里做了什么
<%= 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" %>
我讨厌这样编码，但这次我非常小心地顺其自然...
如果有人已经为此目的使用了 cocoon 并且可以更好地解释我 - 以及社区 - 将不胜感激：D
所做的更改：
型号
class MealIngredient < ActiveRecord::Base
belongs_to :meal
belongs_to :ingredient
accepts_nested_attributes_for :ingredient, :reject_if => :all_blank
end
控制器
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
观看次数
_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>
我没有找到与我的问题相关的任何内容。 我有这些型号：
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
在 meal_ingredient 模型中，我有一个 数量 列，我想让用户在创建包含许多成分的新餐时设置此数量。为此，我使用了 cocoon gem。这就是问题来的时候：我必须设置 ingredient_id 和 meal_id 来建立与数量的关联，但我只是在提交 "Create Meal" 按钮时访问了数据库。
我认为的部分解决方案是在表单中创建一个 fields_for 并在控制器中设置一个实例变量。
但是我怎样才能得到这些ID？我卡住了。
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
这是我目前得到的...我不认为主要问题是由茧引起的 gem。我认为这是关于概念的...
参数
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"}
查看 _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>
我也用过 cocoon，但在设置时遇到了一些麻烦。我认为你必须意识到 Rails 比你想象的更聪明。您可以轻松地在参数字符串上调用保存。只要确保所有参数都被接受。例如，您还需要 :id 表示 ingredients_attributes（以及 :_destroy，如果您也允许删除）。哦，还有为你的加入 table 松开 nested_attributes。
我认为这样的事情应该可行：
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
private
def meal_params
params.require(:meal).permit(:name, :picture, ingredients_attributes: [:id, :name, :unit, :carb, :prot, :fat, :_destroy])
end
如果没有，请post您包含主要形式和部分形式的视图。
正在关注 this tutorial and looking at the cocoon's demo 个应用。很容易解决我的问题，虽然我实际上并不知道我在这里做了什么
<%= 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" %>
我讨厌这样编码，但这次我非常小心地顺其自然...
如果有人已经为此目的使用了 cocoon 并且可以更好地解释我 - 以及社区 - 将不胜感激：D
所做的更改：
型号
class MealIngredient < ActiveRecord::Base
belongs_to :meal
belongs_to :ingredient
accepts_nested_attributes_for :ingredient, :reject_if => :all_blank
end
控制器
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
观看次数
_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>