Unpermitted Parameter for Nested Resource in JSON Payload - ruby-on-rails

Question

I am having difficulty sending a JSON payload to an endpoint that contains a nested resource that I would like created with associations in-tact and persisted... no matter what I do I am presented in the console with Unpermitted parameter: :ingredients.
models/meal.rb
class Meal < ApplicationRecord
has_many :ingredients
accepts_nested_attributes_for :ingredients
end
models/ingredient.rb
class Ingredient < ApplicationRecord
belongs_to :meal
end
controller/meals_controller.rb
class MealsController < ApplicationController
def create
#meal = Meal.new(meal_params)
puts meal_params.inspect
# just want to see the parameters in the log
# ...
end
private
def meal_params
params.require(:meal).permit(
:name,
ingredients_attributes: [:id, :text]
)
end
end
db/migrate/xxx_create_inredients.rb
class CreateIngredients < ActiveRecord::Migration[5.1]
def change
create_table :ingredients do |t|
t.belongs_to :meal, index: true
t.string :text
t.timestamps
end
end
end
request JSON payload
{
"meal": {
"name": "My Favorite Meal",
"ingredients": [
{ "text": "First ingredient" },
{ "text": "Second ingredient" }
]
}
}
I tried another approach from a SO article encountering a similar problem that seemed to recognize the ingredients parameter, but ultimately threw a 500:
params.require(:meal).permit(:name, { ingredients: [:id, :text] })
When doing that I receive the following:
ActiveRecord::AssociationTypeMismatch (Ingredient(#70235637684840) expected, got {"text"=>"First Ingredient"} which is an instance of ActiveSupport::HashWithIndifferentAccess(#70235636442880))
Any help in pointing out my flaw is much appreciated. And yes, I want the nested ingredients resource to be part of the payload going to this endpoint.

Answer 1

The only problem that you have here is that you have in your meal params ingredients_attributes
def meal_params
params.require(:meal).permit(
:name,
ingredients_attributes: [:id, :text]
)
end
so in your payload you need to have it with that key too
{
"meal": {
"name": "My Favorite Meal",
"ingredients_attributes": [
{ "text": "First ingredient" },
{ "text": "Second ingredient" }
]
}
}
they need to match.