a component of the Rails framework that holds the state of an object and is responsible for enforcing business rules and persisting the object.
Questions tagged [rails-models]
367 questions
2
votes
2 answers
How to eager load child model's sum value for ruby on rails?
I have an Order model, it has many items, it looks like this
class Order < ActiveRecord::Base
has_many :items
def total
items.sum('price * quantity')
end
end
And I have an order index view, querying order table like this
def index
…
Fang-Pen Lin
- 13,420
- 15
- 66
- 96
2
votes
1 answer
Turning a Rails AssociationRelation into a CollectionProxy
Say I have these classes:
class Zoo < ActiveRecord::Base
has_many :animals
end
class Animal < ActiveRecord::Base;
belongs_to :zoo
end
class Lion < Animal; end
class Tiger < Animal; end
I can easily do a_zoo.animals but moreover a_zoo.animals…
whatyouhide
- 15,897
- 9
- 57
- 71
2
votes
2 answers
search the records using two keys in two tables in rails
I have models named User and Service
User model has the following columns: user_name and location_name
Service model has the following columns: user_location and service_name
Now i want to search for the Users who are residing in a particular…
monu
- 698
- 4
- 10
2
votes
1 answer
more than one entry saved on has_one association rails
I am trying to create a has_one association among two model.
class User < ActiveRecord::Base
has_one :emergency_contact
end
class EmergencyContact < ActiveRecord::Base
belongs_to :user
end
when i try to test it through rails console more than…
Abhishek Rai
- 47
- 2
- 7
2
votes
1 answer
Rails: Use reload! in controller
I'm creating a rails code that could add/remove field of a model.
I've a model Inventory, where I could add a list of fields as below:
def update_new_fields
@fieldnames = params["fieldnames"]
@fieldnames.each do |fieldname|
…
Gavin Yap
- 642
- 12
- 26
2
votes
1 answer
What is the proper way to use namespaces and reference models inheriting from other (mongoid/rails)?
I have the model HandlingScenario who inherits from Scenario. Like this:
## models/scenario.rb
class Scenario
include Mongoid::Document
end
## models/scenarios/handling_scenario.rb
class Scenarios::HandlingScenario < Scenario
include…
Cjoerg
- 1,271
- 3
- 21
- 63
2
votes
2 answers
How to join model with attribute of other (related) model (plotting data from child)
In an app using the chartkick gem:
I have the following database table relations:
class User < ActiveRecord::Base
has_many :games
contains id, email
end
class Game < ActiveRecord::Base
has_many :levels
belongs_to :user
#contains id,…
David Karlsson
- 9,396
- 9
- 58
- 103
2
votes
1 answer
Create a select from existing or create new in a form Rails 3
So I'm trying to set a name attribute of organizations and create a new organization or choose from a previously existing organization from the same form.
I've tried to follow Ryan Bates' railscast on the topic here:…
CimmerianMuse
- 77
- 8
2
votes
1 answer
How to test Model Errors with Mocha and rspec?
I have this problem related to testing model errors with Mocha:
This is my controller (Api / Artist controller):
class Api::ArtistsController < ApplicationController
respond_to :json
def create
artist = Artist.new(params[:artist])
…
diegocst90
- 61
- 7
2
votes
3 answers
How to display this instance method from rails model?
I have two rails models, Usage & Price. So far they look like this:
class Usage < ActiveRecord::Base
has_one :price
def spend
usage.amount * price.amount
end
end
and
class Price < ActiveRecord::Base
belongs_to…
KevL
- 403
- 6
- 15
2
votes
1 answer
Get variable from another table in ROR models
I am trying to get a user who has not filled out their profile to redirect to the edit page.
I have two tables - Users (Devise handles) and Profiles.
Profiles has a row called profile_complete
In my user model I am trying to define a method called…
user1847224
2
votes
1 answer
How does Rails automatically load ModelHelper into Model
I'm interested in how Rails automatically loads the modules in app/helpers into models.
To wit: when app/helpers/widget_helper.rb exists and contains WidgetHelper that module is automatically loaded into the Widget model.
I have need of a directory…
JohnMetta
- 18,782
- 5
- 31
- 57
2
votes
1 answer
Devise: Nested sign up form when the user and profile are separate models
I'm and usings devise for my authentication and would like to keep the details of my users in a separate model called profile. Profile contains information like first and last name. I want to be able to have a single sign up form that will be able…
Aaron Dufall
- 1,177
- 10
- 34
2
votes
1 answer
Updating 2 models at once with same attributes in ruby on rails
i hav this in my store_opening_stock form
<%= simple_form_for @store_opening_stock do |f| %>
<%= f.error_messages %>
<%= f.hidden_field :user_id, :value => current_user.id %> <%= f.label :employee_id %> <%=…
bharath
- 623
- 7
- 30
1
vote
2 answers
Rails: two models with one-to-one relationship, one controller
I've created a simple webapp with user authentication. I've made two models: Users for user authentication and Details for additional user details. They are associated with one-to-one relationship. I'm having problems with updating two models from…
aL3xa
- 35,415
- 18
- 79
- 112