Ruby Nested Form

Question

Actually, On saving it must save, but i am getting error and tried to figure out the error where i did mistake.

Kindly help me with this error.

Thanks in Advance.

Controller

def new
  @fooditem = Fooditem.new
  3.times { @fooditem.fooditemprices.build}
end

#Creating Food Items
def create
    @fooditem = Fooditem.new(fooditem_params)
    if @fooditem.save
        flash[:success] = "Food item created successfully."
        redirect_to fooditems_path
    else
        render 'new'
    end
end

Model(s)

class Fooditem < ApplicationRecord
  has_many  :fooditemprices, dependent: :destroy
  accepts_nested_attributes_for :fooditemprices, reject_if: lambda {|attributes| attributes['price'].blank?}, allow_destroy: true
end

class Fooditemprice < ApplicationRecord
  belongs_to :fooditem

  validates :size, presence: { message: "Size must exists." }
  validates :price, presence: { message: "Price must exists." }
end

Form data

<%= f.fields_for :fooditemprices do |ftp_form| %>
 <div class="col-sm-9 row col-sm-offset-3">
   <div class="col-sm-3">  
     <%= ftp_form.select :size, ["Full", "Half", "Small", "Medium", "Large"].collect { |p| [p, p] },{}, {class: "form-control"} %>
   </div>     
   <div class="col-sm-3">
      <%= ftp_form.number_field :price, placeholder: "Price", class: "form-control" %>
   </div>
   <div class="col-sm-3">      
      <%= ftp_form.number_field :weight, placeholder: "Weight", class: "form-control" %>
   </div>                
   <div class="col-sm-3">               
      <%= ftp_form.select :weight_in, ["Grams", "ml"].collect { |p| [p, p] },{}, {class: "form-control"} %>
   </div>
  </div>
<% end -%>

Error

fooditem must exist

Params Received

"fooditem"=>{"name"=>"Food Item Name",
              "bdescription"=>"Food Item description of brief",
              "ddescription"=>"Food Item description of detailed",
              "priority"=>"1",
              "foodtype_id"=>"1",
              "foodcategory_id"=>"1",
              "fooditemprices_attributes"=>{
                    "0"=>{"size"=>"Full", "price"=>"120", "weight"=>"200", "weight_in"=>"Grams"},
                    "1"=>{"size"=>"Full", "price"=>"80", "weight"=>"120", "weight_in"=>"Grams"},
                    "2"=>{"size"=>"Full", "price"=>"50", "weight"=>"60", "weight_in"=>"Grams"}},
              "sku"=>"",
              "active"=>"1"},
              "commit"=>"Create Food Item"}

can yo try to replace belongs_to :fooditem with belongs_to :fooditem, optional: true? — Thanh
– Thanh, Commented Dec 22, 2016 at 6:14
Could you print params, received by your controller and fooditem_params method here? And I don't see anything about FoodItem in your view, only FooditemPrices — unkmas
– unkmas, Commented Dec 22, 2016 at 6:32
' "fooditem"=>{"name"=>"Food Item Name", "bdescription"=>"Food Item description of brief", "ddescription"=>"Food Item description of detailed", "priority"=>"1", "foodtype_id"=>"1", "foodcategory_id"=>"1", "fooditemprices_attributes"=>{ "0"=>{"size"=>"Full", "price"=>"120", "weight"=>"200", "weight_in"=>"Grams"}, "1"=>{"size"=>"Full", "price"=>"80", "weight"=>"120", "weight_in"=>"Grams"}, "2"=>{"size"=>"Full", "price"=>"50", "weight"=>"60", "weight_in"=>"Grams"}}, "sku"=>"", "active"=>"1"}, "commit"=>"Create Food Item"} ' — Modi Ranga Nayakulu
– Modi Ranga Nayakulu, Commented Dec 22, 2016 at 6:36

Thanh · Accepted Answer · 2016-12-22 07:05:12Z

2

You are using Rails 5, so default belongs_to requires association record must be exist.

Try to add inverse in your association like this:

class Fooditem < ApplicationRecord
  has_many  :fooditemprices, dependent: :destroy, inverse_of: :fooditem
end

class Fooditemprice < ApplicationRecord
  belongs_to :fooditem, inverse_of: :fooditemprices
end

and it should work.

edited Dec 22, 2016 at 7:05

answered Dec 22, 2016 at 6:48

Thanh

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