我正在开发一个api RubyonRails6.1应用程序，所以我所有的响应都是json。我正在尝试创建一个3级嵌套记录，这意味着我要创建一个包含多天记录的计划记录，该记录每天包含多顿饭。
plan.rb
class Plan < ApplicationRecord
has_many :days
accepts_nested_attributes_for :days
endday.rb
class Day < ApplicationRecord
has_many :meals
belongs_to :plan
accepts_nested_attributes_for :meals
end膳食.rb
class Meal < ApplicationRecord
belongs_to :plan
belongs_to :day
end这是plans_controller.rb中的方法
# POST /create_custon_plan
def create_custon_plan
@plan = Plan.new(plan_params)
@days = @plan.days
@meals = Meal.where("plan_id = ? ", @plan.id)
if @plan.save
@days.each do |day|
day = Day.find_or_create_by!(name: params[:number], plan_id: @plan.id) if params[:number].present?
if day.save
@meals.each do |meal|
meal = Meal.find_or_create_by!(name: params[:name], plan_id: @plan.id, day_id: day.id) if params[:name].present?
if meal.save
render json: {
messages: "meals was successfully created.",
is_success: true,
status: :created,
data: { meal: meal },
}
else
render json: meal.errors, status: :unprocessable_entity
end
end
render json: {
messages: "days was successfully created.",
is_success: true,
status: :created,
data: { day: day },
}
else
render json: day.errors, status: :unprocessable_entity
end
end
render json: {
messages: "Plan was successfully created.",
is_success: true,
status: :created,
data: { plan: @plan, days: @days, meals: @meals },
}
else
render json: @plan.errors, status: :unprocessable_entity
end
end这是我的请求机构http://localhost:3000/api/create_custon_plan
{
"name": "Test Plan",
"monthly_price": 0,
"image_url": null,
"days": [
{
"number": 1,
"plan_id": 4,
"meals": [
{
"id": 269,
"name": "Kale Salad",
"calories": null,
"protein": null,
"fat": null,
"carbohydrates": null,
"plan_id": 4,
"image_url": null,
"categorie": "snack-1"
},
{
"id": 270,
"name": "Fit Burger",
"calories": null,
"protein": null,
"fat": null,
"carbohydrates": null,
"plan_id": 4,
"image_url": null,
"categorie": "meal-1"
},
{
"id": 271,
"name": "Vegan Rataouille",
"calories": null,
"protein": null,
"fat": null,
"carbohydrates": null,
"plan_id": 4,
"image_url": null,
"categorie": "snack-2"
},
{
"id": 272,
"name": "Chicken BBQ",
"calories": null,
"protein": null,
"fat": null,
"carbohydrates": null,
"plan_id": 4,
"image_url": null,
"categorie": "meal-3"
}
]
},
{
"number": 2,
"plan_id": 4,
"meals":
[
{
"id": 273,
"name": "Woldrof Salad",
"calories": null,
"protein": null,
"fat": null,
"carbohydrates": null,
"plan_id": 4,
"image_url": null,
"categorie": "snack-1"
},
{
"id": 274,
"name": "Baked Beef",
"calories": null,
"protein": null,
"fat": null,
"carbohydrates": null,
"plan_id": 4,
"image_url": null,
"categorie": "meal-1"
}
]
}
]
}我们希望创建1个计划记录、多天记录和多个用餐记录，但在终端日志之后，只创建了计划记录，其他模型甚至没有出现在那里，就像代码行不存在一样。这是终端日志
Started POST "/api/create_custon_plan" for ::1 at 2021-07-23 15:43:08 +0100
(0.9ms) SELECT "schema_migrations"."version" FROM "schema_migrations" ORDER BY "schema_migrations"."version" ASC
Processing by PlansController#create_custon_plan as */*
Parameters: {"name"=>"Test Plan", "monthly_price"=>0, "image_url"=>nil, "days"=>[{"number"=>1, "plan_id"=>4, "meals"=>[{"id"=>269, "name"=>"Kale Salad", "calories"=>nil, "protein"=>nil, "fat"=>nil, "carbohydrates"=>nil, "plan_id"=>4, "image_url"=>nil, "categorie"=>"snack-1"}, {"id"=>270, "name"=>"Fit Burger", "calories"=>nil, "protein"=>nil, "fat"=>nil, "carbohydrates"=>nil, "plan_id"=>4, "image_url"=>nil, "categorie"=>"meal-1"}, {"id"=>271, "name"=>"Vegan Rataouille", "calories"=>nil, "protein"=>nil, "fat"=>nil, "carbohydrates"=>nil, "plan_id"=>4, "image_url"=>nil, "categorie"=>"snack-2"}, {"id"=>272, "name"=>"Chicken BBQ", "calories"=>nil, "protein"=>nil, "fat"=>nil, "carbohydrates"=>nil, "plan_id"=>4, "image_url"=>nil, "categorie"=>"meal-3"}]}, {"number"=>2, "plan_id"=>4, "meals"=>[{"id"=>273, "name"=>"Woldrof Salad", "calories"=>nil, "protein"=>nil, "fat"=>nil, "carbohydrates"=>nil, "plan_id"=>4, "image_url"=>nil, "categorie"=>"snack-1"}, {"id"=>274, "name"=>"Baked Beef", "calories"=>nil, "protein"=>nil, "fat"=>nil, "carbohydrates"=>nil, "plan_id"=>4, "image_url"=>nil, "categorie"=>"meal-1"}]}], "plan"=>{"name"=>"Test Plan", "monthly_price"=>0}}
Can't verify CSRF token authenticity.
TRANSACTION (0.3ms) BEGIN
↳ app/models/plan.rb:13:in `acceptable_image'
Plan Create (1.0ms) INSERT INTO "plans" ("name", "monthly_price", "created_at", "updated_at") VALUES ($1, $2, $3, $4) RETURNING "id" [["name", "Test Plan"], ["monthly_price", 0], ["created_at", "2021-07-23 14:43:08.845314"], ["updated_at", "2021-07-23 14:43:08.845314"]]
↳ app/controllers/plans_controller.rb:42:in `create_custon_plan'
TRANSACTION (1.0ms) COMMIT
↳ app/controllers/plans_controller.rb:42:in `create_custon_plan'
Day Load (1.7ms) SELECT "days".* FROM "days" WHERE "days"."plan_id" = $1 [["plan_id", 34]]
↳ app/controllers/plans_controller.rb:43:in `create_custon_plan'
[active_model_serializers] Meal Load (2.9ms) SELECT "meals".* FROM "meals" WHERE (plan_id = NULL )
[active_model_serializers] ↳ app/controllers/plans_controller.rb:69:in `create_custon_plan'
[active_model_serializers] Rendered ActiveModel::Serializer::Null with Hash (5.92ms)
Completed 200 OK in 49ms (Views: 5.3ms | ActiveRecord: 13.8ms | Allocations: 14452)最后是请求的返回体
{
"messages": "Plan was successfully created.",
"is_success": true,
"status": "created",
"data": {
"plan": {
"id": 34,
"name": "Test Plan",
"monthly_price": 0,
"created_at": "2021-07-23T14:43:08.845Z",
"updated_at": "2021-07-23T14:43:08.845Z",
"is_custom": null
},
"days": [],
"meals": []
}
}很抱歉，我说了这么长时间，但我想尽可能多地提供细节。
1条答案
按热度按时间hgtggwj01#
您不需要在它们上循环并单独创建它们。
Plan.new(plan_params)要完成这项工作，只需正确指定嵌套属性。变化：days到day_attributes不需要通过身份证。例如：
}
您还可以在许可参数中正确传递它们，如：
有关更多信息，请参阅：https://api.rubyonrails.org/v3.2/classes/activerecord/nestedattributes/classmethods.html