I have a problem with using Class-Table-Inheritance gem. When I try check in console the correctness of inheritance console return this error:
NoMethodError: undefined method `set_primary_key' for Client (call
'Client.connection' to establish a connection):Class
I define primary key for Client, but there is still error.
class Person < ActiveRecord::Base
acts_as_superclass
self.table_name = 'people'
end
Model Client
class Client < ActiveRecord::Base
inherits_from :person
self.primary_key = "person_id"
end
Part of migration file CreatePeople
create_table :people do |t|
t.string :pesel, null: false
t.string :first_name, null: false
t.string :last_name, null: false
t.string :email, null: false
t.date :date_of_birth, null: false
t.timestamps null: false
end
Part of migration file CreateClients
create_table :clients, :inherits => :person do |t|
end
How to resolve this problem?
Related
I have a User table and a Booking Table that is linked by a create_join_table what holds the user id and booking ids. When a user books a room, i need the id of both the user and new booking to go into that. I am getting the error above and im not sure why.
I have looked online and saw something similar, their class names were plural however I don't think I have that.
booking.rb
class Booking < ApplicationRecord
enum room_type: ["Basic Room", "Deluxe Room", "Super-Deluxe Room", "Piton Suite"]
has_many :join_tables
has_many :users, through: :join_tables
end
user.rb
class User < ApplicationRecord
has_secure_password
validates :email, format: {with: URI::MailTo::EMAIL_REGEXP}, presence: true, uniqueness: true
has_many :join_tables
has_many :bookings, through: :join_tables
end
join_table.rb
class JoinTable < ApplicationRecord
belongs_to :users
belongs_to :bookings
end
bookings_controller.rb
def create
#booking = Booking.create(booking_params)
current_user.bookings << #booking ##Where the error happens
db/schema
ActiveRecord::Schema.define(version: 2019_12_13_181019) do
create_table "bookings", force: :cascade do |t|
t.integer "room_type"
t.date "check_in"
t.date "check_out"
t.datetime "created_at", null: false
t.datetime "updated_at", null: false
end
create_table "join_tables", force: :cascade do |t|
t.integer "users_id"
t.integer "bookings_id"
t.datetime "created_at", null: false
t.datetime "updated_at", null: false
t.index ["bookings_id"], name: "index_join_tables_on_bookings_id"
t.index ["users_id"], name: "index_join_tables_on_users_id"
end
create_table "users", force: :cascade do |t|
t.string "name"
t.string "email"
t.string "password_digest"
t.datetime "created_at", null: false
t.datetime "updated_at", null: false
end
end
I have just tried to reproduce your problem and I have a similar exception
irb(main):003:0> User.first.bookings
NameError (uninitialized constant User::Bookings)
but, when I change
belongs_to :users
belongs_to :bookings
to
belongs_to :user
belongs_to :booking
in app/models/join_table.rb everything works as expected.
This is how I created the JoinTable model
$ rails generate model JoinTable
class CreateJoinTables < ActiveRecord::Migration[6.0]
def change
create_table :join_tables do |t|
t.references :user
t.references :booking
t.timestamps
end
end
end
As you can see in the belongs_to docs, it is used in the singular form most of the time.
So I am struggling with this error. While building a react on rails project.
Completed 500 Internal Server Error in 75ms (ActiveRecord: 6.1ms)
ActiveModel::UnknownAttributeError (unknown attribute 'product_id' for >Property.):
When I run this controller:
class SendDataController < ApplicationController
protect_from_forgery with: :null_session
def save
product = Product.create(name:params[:name], upc:params[:upc].to_i, available_on:params[:availableon])
property = product.Properties.build(name:params[:properties][0][:name])
property.save
end
end
I have tried to things found here and here. But I am getting no where. Below is my current setup.
Models:
class ProductProperty < ApplicationRecord
belongs_to :Property
belongs_to :Product
end
class Product < ApplicationRecord
has_many :Properties
has_many :ProductProperties
end
class Property < ApplicationRecord
belongs_to :Product
has_one :ProductProperty
end
Migration:
class CreateProducts < ActiveRecord::Migration[5.2]
def change
create_table :products do |t|
t.string :name
t.string :upc
t.datetime :available_on
t.timestamps
end
end
end
class CreateProperties < ActiveRecord::Migration[5.2]
def change
create_table :properties do |t|
t.string :name
t.timestamps
end
end
end
class CreateProductProperties < ActiveRecord::Migration[5.2]
def change
create_table :product_properties do |t|
t.string :value
t.timestamps
end
end
end
class AddProductRefToProperties < ActiveRecord::Migration[5.2]
def change
add_reference :properties, :Product, foreign_key: true
end
end
class AddProductRefToProductProperties < ActiveRecord::Migration[5.2]
def change
add_reference :product_properties, :Product, foreign_key: true
end
end
class AddPropertiesRefToProductProperties < ActiveRecord::Migration[5.2]
def change
add_reference :product_properties, :Property, foreign_key: true
end
end
Schema:
ActiveRecord::Schema.define(version: 2018_09_24_163027) do
create_table "product_properties", force: :cascade do |t|
t.string "value"
t.datetime "created_at", null: false
t.datetime "updated_at", null: false
t.integer "Product_id"
t.integer "Property_id"
t.index ["Product_id"], name: "index_product_properties_on_Product_id"
t.index ["Property_id"], name: "index_product_properties_on_Property_id"
end
create_table "products", force: :cascade do |t|
t.string "name"
t.string "upc"
t.datetime "available_on"
t.datetime "created_at", null: false
t.datetime "updated_at", null: false
end
create_table "properties", force: :cascade do |t|
t.string "name"
t.datetime "created_at", null: false
t.datetime "updated_at", null: false
t.integer "Product_id"
t.index ["Product_id"], name: "index_properties_on_Product_id"
end
end
Thanks for any help you can give me!
ActiveModel::UnknownAttributeError (unknown attribute 'product_id' for
Property.)
It says there is no product_id in properties table. That is true because you have Product_id instead of product_id, so is the error.
Rails Conventions
By default, attribute names should be snakecase. You should generate a migration which will change Product_id to product_id and migrate as to fix the error. You should also change association names to snakecase as well. For instance
belongs_to :Property
belongs_to :Product
should be
belongs_to :property
belongs_to :product
In my Rails project with a Postgres database, I have a user and workspace model. They are associated by a many to many relationship (users_workspaces). If I open up my rails console and try to get all user workspaces with UserWorkspace.all, I get the following 'relation does not exist' error:
2.5.1 :001 > UserWorkspace.all
Traceback (most recent call last):
ActiveRecord::StatementInvalid (PG::UndefinedTable: ERROR: relation "user_workspaces" does not exist)
LINE 1: SELECT "user_workspaces".* FROM "user_workspaces" LIMIT $1
^
: SELECT "user_workspaces".* FROM "user_workspaces" LIMIT $1
2.5.1 :002 >
I don't understand why it's looking for user_workspaces (user being singular) rather than users_workspaces (both names plural). I'll looked through my codebase to see if this is in fact set somewhere as user_workspaces, but can't find it. I've also run rails db:drop db:create db:migrate, but still no luck. Here are related files, but I'm not sure where is issue is originating from.
user model
class User < ApplicationRecord
has_secure_password
has_and_belongs_to_many :workspaces
validates_presence_of :username, :email, :password, :subscription_plan
validates_uniqueness_of :username, :email
validates_length_of :username, :within => 3..40
validates_length_of :password, :within => 8..100
end
workspace model
class Workspace < ApplicationRecord
has_and_belongs_to_many :users
validates_presence_of :name
validates_presence_of :admin_id
end
user_workspace model
class UserWorkspace < ApplicationRecord
belongs_to :user
belongs_to :workspace
validates_presence_of :user, :workspace
end
schema.rb
ActiveRecord::Schema.define(version: 2018_07_28_040836) do
# These are extensions that must be enabled in order to support this database
enable_extension "plpgsql"
create_table "users", force: :cascade do |t|
t.string "username", null: false
t.string "email", null: false
t.string "first_name"
t.string "last_name"
t.string "password_digest"
t.integer "subscription_plan", default: 0, null: false
t.integer "current_workspace"
t.datetime "created_at", null: false
t.datetime "updated_at", null: false
t.index ["username"], name: "index_users_on_username", unique: true
end
create_table "users_workspaces", id: false, force: :cascade do |t|
t.bigint "user_id", null: false
t.bigint "workspace_id", null: false
t.index ["user_id", "workspace_id"], name: "index_users_workspaces_on_user_id_and_workspace_id"
t.index ["workspace_id", "user_id"], name: "index_users_workspaces_on_workspace_id_and_user_id"
end
create_table "workspaces", force: :cascade do |t|
t.string "name", null: false
t.text "description"
t.integer "admin_id"
t.datetime "created_at", null: false
t.datetime "updated_at", null: false
end
end
users migrations
class CreateUsers < ActiveRecord::Migration[5.2]
def change
create_table :users do |t|
t.string :username, null: false, index: {unique: true}
t.string :email, null: false, unique: true
t.string :first_name
t.string :last_name
t.string :password_digest
t.integer :subscription_plan, null: false, default: 0
t.integer :current_workspace
t.timestamps
end
end
end
workspaces migration
class CreateWorkspaces < ActiveRecord::Migration[5.2]
def change
create_table :workspaces do |t|
t.string :name, null: false
t.text :description
t.integer :admin_id
t.timestamps
end
end
end
users_workspaces (join table) migration file
class CreateJoinTableUsersWorkspaces < ActiveRecord::Migration[5.2]
def change
create_join_table :users, :workspaces do |t|
t.index [:user_id, :workspace_id]
t.index [:workspace_id, :user_id]
end
end
end
Any and all help would be greatly appreciated. Thanks!
As mentioned in schema.rb table is created by the name users_workspaces and your class name is UserWorkspaces.
By default, rails try to infer the table name for a Model by its class name.
So, If classname is UserWorkspace then its corresponding table_name will be user_workspaces and not users_workspaces.
Now, You have two options either rename your model or somehow mention in your model that the table you want to use for this model.
Option-1
Rename Model
class UsersWorkspace < ApplicationRecord
belongs_to :user
belongs_to :workspace
validates_presence_of :user, :workspace
end
Option-2
Allow UserWorkspace model to point to users_workspaces table
class UserWorkspace < ApplicationRecord
self.table_name = 'users_workspaces'
belongs_to :user
belongs_to :workspace
validates_presence_of :user, :workspace
end
UPDATE
In addition to above in UserWorkspace/UsersWorkspace Model you don't need
validates_presence_of :user, :workspace
as since you are using rails 5.2, therefore, rails itself adds presence validation along with belongs_to association unless you have pass optional: true argument or you have declared it in the following way in application.rb
Rails.application.config.active_record.belongs_to_required_by_default = false
I'm getting a database ROLLBACK with this error in development when I try to update a Puzzle object's User object through the Rails console:
TypeError: can't cast ActiveRecord::ConnectionAdapters::PostgreSQL::OID::Array::Data
This only happens when I attempt to use update (or save after something like puzzle.user = some_user). Adding the initial owner commits to the database without issue.
Here are the models in the schema:
create_table "users", force: :cascade do |t|
t.string "username"
t.string "password_digest"
t.string "email"
t.datetime "created_at", null: false
t.datetime "updated_at", null: false
t.integer "location_id"
end
create_table "puzzles", force: :cascade do |t|
t.string "name"
t.integer "pieces"
t.integer "missing_pieces"
t.string "previous_owners", array: true
t.integer "user_id"
t.datetime "created_at", null: false
t.datetime "updated_at", null: false
end
And here are the puzzle.rb and user.rb files so far:
class User < ApplicationRecord
validates :username, presence: true
validates :email, presence: true#, uniqueness: true
# use bcrypt for password security
has_secure_password
has_many :puzzles
has_many :reviews
belongs_to :location
end
class Puzzle < ApplicationRecord
validates :name, uniqueness: true
validates :pieces, presence: true, numericality: { only_integer: true }
belongs_to :user
has_many :puzzle_tags
has_many :tags, through: :puzzle_tags
has_many :reviews
delegate :location, to: :user
end
Any idea what could be causing the issue?
***Please note: I'm a newbie and using PostgreSQL for the first time. I specifically chose Postgres as my development database instead of SQLite3 because it allows for array data types. Thanks!
You have previous_owners set up as a string array, but you are pushing integers into it. ActiveRecord is good at casting strings to integers and vice versa normally, but as of Rails 5.1.5, that functionality doesn't work in array fields.
Try using a migration to change the field to an integer array. You'll need to do:
$ rails g migration change_previous_owners_to_integer_array
Then edit the resulting migration file like this:
def change
remove_column :puzzles, :previous_owners, :string, array: true
add_column :puzzles, :previous_owners, :integer, array: true
end
This is a very noob question, I am starting with Rails. I have a class User that has many Rates and each rates belongs to a user.
Rate Class
class Rate < ActiveRecord::Base
belongs_to :user
end
User Class
class User < ActiveRecord::Base
include Authenticable
has_many :rates
validates :username, uniqueness: true, allow_blank: true, allow_nil: true
Migration of Rates
class CreateRates < ActiveRecord::Migration
def change
create_table :rates do |t|
t.string :points
t.timestamps null: false
end
end
end
Migration of User
class DeviseCreateUsers < ActiveRecord::Migration
def change
create_table :users do |t|
## Database authenticatable
t.string :email, null: true, default: ""
t.string :encrypted_password, null: false, default: ""
## Recoverable
t.string :reset_password_token
t.datetime :reset_password_sent_at
## Trackable
t.integer :sign_in_count, default: 0, null: false
t.datetime :current_sign_in_at
t.datetime :last_sign_in_at
t.inet :current_sign_in_ip
t.inet :last_sign_in_ip
t.string :authentication_token, default: ""
## User attributes
t.string :username, default: ""
t.timestamps
end
add_index :users, :email, unique: true
add_index :users, :reset_password_token, unique: true
add_index :users, :authentication_token, unique: true
end
end
When I create the database and run rake db:migrate, all entity are migrated ok but the table rate has not user_id
You need to add user_id column to rates table
Hard to say without seeing the migration files themselves, but you can use the add_reference function in your migrations to add a reference to a table:
class AddUserIdToRate < ActiveRecord::Migration
def change
unless column_exists? :rates, :user_id
add_reference :rates, :user, index: true
end
end
end
If you get an error, post it here and we can hopefully provide more information.
Edit
There's nothing in your migrations involving the creation of a user_id column on your rates table. Adding a migration with the above code should add the user_id foreign key.