I have a 1-N relationship in Mongoid/Rails:
class Company
include Mongoid::Document
field :name, type: String
embeds_many :people, class_name: 'Person'
end
class Person
include Mongoid::Document
field :first_name, type: String
embedded_in :company, class_name: 'Company', inverse_of: 'people'
end
Now I can successfully create a Company as follows in the console; for example:
> c = Company.new(name: 'GLG', :people => [{first_name: 'Jake'}]) # OK!
> c.people # OK!
Then I have a JSON API controller to update a company, along the lines of:
# PUT /api/companies/:id
def update
if Company.update(company_params)
# ... render JSON
else
# ... render error
end
end
private
def company_params
params.require(:company).permit(:name, :people => [:first_name])
end
Now, when the PUT request comes in from the frontend, the company_params is always missing the :people attribute. Rails log says:
Parameters: {"id"=>"5436fbc64a616b5240050000", "name"=>"GLG", "people"=>[{"first_name"=>"Jake"}], "company"=>{"name"=>"GLG"}}
I don't get an "Unpermitted parameters" warning. I've tried every conceivable way of permitting the people field and it still doesn't get included.
params.require(:company).permit!
Results in the same. What am I doing wrong?
You have to accept nested_attributes on assignment
class Company
include Mongoid::Document
field :name, type: String
embeds_many :people, class_name: 'Person'
accepts_nested_attributes_for :people
end
Related
I need help implement a route to fetch all blog posts by author_ids.
The post that we're fetching needs to have at least one of the authors specified in the passed in author_ids parameters. I've created a helper function to help me fetch all blog posts by their ID, Post.get_posts_by_user_id
I also need to sort the posts by query parameters given. Also, I need to delete any duplicated posts as efficiently as possible.
I'm stumped here because of the way author_ids is being given. (I'm extremely new to Ruby)
This is what we should get returned from the route: "posts": [{"id": 1, "likes": 960, "popularity": 0.13, "reads": 50361, "tags": ["tech", "health"], text": "Some text here."}, ... ]
Query parameters expected to be given to this route
Update:
After creating the index method, it seems that it is only getting one post rather than getting all posts that are associated with the passed in authorIds.
def index
posts = current_user
.posts
.where(id: params[:authorIds].split(','))
.order(sort_column => sort_direction)
if posts
render json: { post: posts }, status: :ok
else
render json: {error: posts.errors}, status: :unprocessable_entity
end
end
Test cases
Update 2:
Post Model:
class Post < ApplicationRecord
# Associations
has_many :user_posts
has_many :users, through: :user_posts, dependent: :destroy
# Validations
validates :text, presence: true, length: { minimum: 3 }
validates :popularity, inclusion: { in: 0.0..1.0 }
def tags
if super
super.split(",")
end
end
def tags=(value)
if value.kind_of? Array
super value.join(",")
else
super value
end
end
def self.get_posts_by_user_id(user_id)
Post.joins(:user_posts).where(user_posts: { user_id: user_id })
end
end
User Model:
class User < ApplicationRecord
has_secure_password
# Associations
has_many :user_posts
has_many :posts, through: :user_posts, dependent: :destroy
# Validations
validates :username, :password, presence: true
validates :password, length: { minimum: 6 }
validates :username, uniqueness: true
end
User_post Model:
class UserPost < ApplicationRecord
belongs_to :user
belongs_to :post
end
I would do it like below.
def index
author_ids_array = params[:ids].to_s.split(',')
Post
.get_posts_by_user_id(author_ids_array)
.order(sort_column => sort_direction)
end
private
def sort_column
allow_list = %w[id reads likes popularity]
params[:sortBy].presence_in(allow_list) || allow_list.first
end
def sort_direction
allow_list = %w[asc desc]
params[:direction].presence_in(allow_list) || allow_list.first
end
This question already has answers here:
Rails HABTM setup, model object, & join_table insertion controller setup
(2 answers)
Closed 2 years ago.
I'm new to Ruby on Rails, and I'm developing a backend API.
Currently, I got 2 Active Record Models called Book and Genre.
Active Record Model
class Book < ActiveRecord::Base
has_and_belongs_to_many :genres
end
class Genre < ActiveRecord::Base
hast_and_belongs_to_many :books
end
DB Schema Model
create_table :books do |t|
t.string "title"
end
create_table :genres do |t|
t.string "genre"
end
create_join_table :books, :genres do |t|
t.index [:book_id, :genre_id]
t.index [:genre_id, :book_id]
end
REST POST Request
# POST /book
def create
book= Book.new(books_params)
if book.save
render json: {status: 'SUCCESS', message:'Book Saved', data: book},status: :ok
else
render json: {status: 'ERROR', message: 'Booknot saved', data: book.errors}, status: :unprocessable_entity
end
end
private
def books_params
params.require(:book).permit(:title)
end
QUESTION
I'd like to make an HTTP Post request to create a new book with it's genres. I've already tested the book insertion (without genres, just passing the book name), it works perfectly. However I'd also like to add some genre categories.
Both the has_many and has_and_belongs_to_many class methods create a set of _ids setters and getters:
book = Book.new
book.genre_ids = [1, 2, 3]
book.genre_ids == [1, 2, 3] # true
These setters will automatically create and delete rows in the join table. Since ActiveModel::AttributeAssignment maps the hash argument to .new, .update and .create to setters in the model all you need to do is whitelist the genre_ids parameter:
def books_params
params.require(:book).permit(:title, genre_ids: [])
end
Passing an empty array permits an array of permitted scalar values like for example numericals or strings.
I'm having problems relating some tables, I have the client table with the fields ("name, age and gender") and another table called personal_documents with the fields "cpf, rg, etc ...), I tried the relationship of personal_documents belongs_to client but when i search for client only the fields of client ("name, age and gender) and "personal_documents_id" appear, the fields for personal documents ("cpf, rg, etc...) should also appear too, thanks for the help!
Code:
In client model:
has_one :personal_documents
in personal_documents model:
belongs_to :client
rails generate model Client
inside migration file you create as follow
class CreateClients < ActiveRecord::Migration[6.0]
def change
create_table :clients do |t|
t.string :user_kind
# your other field here
t.timestamps
end
end
end
rails generate model PersonalDocument
inside migration file you create as follow
class CreatePersonalDocuments < ActiveRecord::Migration[6.0]
def change
create_table :personal_documents do |t|
# this is the one that relate personal document
# to client
t.references :client, index: true
t.string :rg_front
# other field
t.timestamps
end
end
end
inside model you can declare as follow
class Client < ApplicationRecord
# please note personal_document in singular
has_one :personal_document, dependent: :destroy
accepts_nested_attributes_for :personal_document, allow_destroy: :true
# now you can do some like above for disponibility, personal_document_legal, bank_information
end
class PersonalDocument < ApplicationRecord
belongs_to :client
end
inside your controller you declare as follow
class ClientsController < ApplicationController
def barang_params
params.require(:client).permit(
:user_kind,
personal_document_attributes: [
:id,
:rg_front,
:rg_back,
:cpf,
:cnh_front,
:cnh_back,
:bank_card_front,
:address_proof,
:profile_picture
]
# this from your other question, and I think it's already correct
)
end
end
To access personal_documents of client
Client.find(1).personal_documents.cpf
To access client of personal_documents
PersonalDocument.find(id).client.name
both
document = PersonalDocument.find(id)
client = document.client
or
client = Client.find(1)
document = client.personal_documents
document.cpf
client.name
additionaly change :has_one to singular personal_document
I'm facing to a stupid problem. I have created a collection select which is creating elements into a join table "staffs_task" to reference an association between the model staff and task.
And now I would like two things: (1) a button delete this association (2) and a little bit of code for my model staffs_task to avoid duplication, so with the task_id and staff_id. And last info, task is a model built by ranch
my code:
(the collection in new_task)
<%= select_tag "staffs_task", options_from_collection_for_select(#staffs, 'id', 'name') , :multiple => true %>
(task_controller)
skip_before_action :configure_sign_up_params
before_action :set_ranch
before_action :set_task, except: [:create]
def create
#task = #ranch.tasks.create(task_params)
#staffs = Staff.where(:id => params[:staffs_task])
#task.staffs << #staffs
if #task.save
#task.update(done: false)
#task.update(star: false)
flash[:success] = "The task was created "
else
flash[:success] = "The task was not created "
end
redirect_to #ranch
end
private
def task_params
params.require(:task).permit(:content, :deadline, :row_order, :date, :assigned_to)
end
def set_ranch
#ranch = Ranch.find(params[:ranch_id])
end
def set_task
#task = #ranch.tasks.find(params[:id])
end
So if you have any idea about one of this two things, your help would be welcome
Thanks in advance !!
Lets say you have the following many to many setup with a join model:
class Staff
has_many :assignments
has_many :tasks, through: :assignments
end
class Task
has_many :assignments
has_many :staff, through: :assignments
end
class Assignment
belongs_to :task
belongs_to :staff
end
Note that the plural of staff is staff - unless you are talking about the sticks carried by wizards.
ActiveRecord creates "magical" _ids setters for all has_many relationships. When used with a has_many through: relationship rails is smart enough to just remove the rows from the join table.
You can use this with the collection_select and collection_checkboxes methods:
<%= form_for([#task.ranch, #task]) do |f| %>
<%= f.collection_select(:staff_ids, Staff.all, :id, :name, multiple: true) %>
<% end %>
You would then set your controller up like so:
def create
#task = #ranch.tasks.new(task_params) do |t|
# this should really be done by setting default values
# for the DB columns
t.done = false
t.star = false
end
if #task.save
redirect_to #ranch, success: "The task was created"
else
render :new, error: "The task was not created"
end
end
private
def task_params
params.require(:task)
.permit(:content, :deadline, :row_order, :date, :assigned_to, staff_ids: [])
end
staff_ids: [] will allow an array of scalar values. Also not that .new and .create are not the same thing! You where saving the record 4 times if it was valid so the user has to wait for 4 expensive write queries when one will do.
I have created Rails(version 3.2) application with mysql database. I have table Message with column content. I can update the following data using rails console but I can't using run same code from seeds.rb.
data: "Join **** Audio / Video Meeting. This is an online meeting by ****, the community marketplace to find products and services in your neighbourhood. http://*****.dev:3000/conferences/80"
I have following code in my seeds.rb file
all_messages = Message.all
all_messages.each do |message|
message_content = message.content
if message_content.present? && message_content[/\/(.*)\/(.*)\/conferences/,2].present?
message_content.slice! (message_content[/\/(.*)\/(.*)\/conferences/,2]+'/')
if message.update_attributes!(content: message_content)
puts message.content
else
puts "nothing"
end
end
end
It does't show any errors, but data is not updated in db and not shown any errors.
This is my model file
class Message < ActiveRecord::Base
attr_accessible :content
after_save :update_conversation_read_status
belongs_to :sender, :class_name => "Person"
belongs_to :conversation
has_one :request
validates_presence_of :sender_id
validates_presence_of :content
def update_conversation_read_status
conversation.update_attribute(:last_message_at, created_at)
conversation.participations.each do |p|
last_at = p.person.eql?(sender) ? :last_sent_at : :last_received_at
p.update_attributes({ :is_read => p.person.eql?(sender), last_at => created_at})
end
end
end
Note: content is text type in db.