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
1
vote
1 answer
Model design for addons in an app
I have a Rails app in which the user can subscribe to addons, the list is dynamic and contains currently about 10 addons.
The list specifies which is on/off.
Each addon has a rather unique set of properties.
My current solution is that the…
Fellow Stranger
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2 answers
need to use `memoize` in custom module in rails3
I have a module in lib folder. Where I have created a InstanceMethods module.
require 'memoist'
extend Memoist
module MyStudentMethods
def self.included base
base.send :include, InstanceMethods
end
module InstanceMethods
def…
Sourabh Upadhyay
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1
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2 answers
Rails table name contains digits
Is it possible to use a table in rails that contains digits in its name?
I have a table named photo_2014_hierarchies
Its model is saved as photo_2014_hierarchy.rb
and inside I use
class Photo2014Hierarchy < ActiveRecord::Base
which works for…
Madeline
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- 5
1
vote
3 answers
More than one has_many :through?
So. I have users and movies. Users have watched some movies and not others. I want to express this relationship something like this:
Note:
Not sure if it matters; but movies don't have to be connected to a user; they can exist independently (i.e.…
TheaterGirl62
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5 answers
How to setup default attributes in a ruby model
I have a model User and when I create one, I want to pragmatically setup some API keys and what not, specifically:
@user.apikey = Digest::MD5.hexdigest(BCrypt::Password.create("jibberish").to_s)
I want to be able to run…
Mitch Dempsey
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1
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2 answers
Why is my model firing the validation at the wrong time?
In my edit action of my employees_controller I have this line of code:
#Employee#edit
69: if @employee.user.person.addresses.length == 0
70: @employee.user.person.addresses << Address.new
71: end
which should add a blank Address if there are none…
aarona
- 35,986
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1 answer
Rails 4: Saving multiple instances of same model in a single form
I have a survey app that allows people to create questions. When a user creates a new question they can also supply answer options. For Ex. Question: What color is the sky? Answer Options: Blue, Red, Purple.
Right now, my single form allows for the…
thedeepfield
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0 answers
Rails: Best way to stub out a model with a string ID?
Say I want to stub out a Product model which will have a product_id field of type string.
Do I add product_id in addition to the default id field that Rails creates?1
rails g model product product_id:string:uniq
Or make product_id the primary…
Dennis
- 56,821
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2 answers
Rails logic best practices
I had some calculations on my controller like this
@travel.food_expenses.map { |e| e.value * e.amount }.sum
I know I shouldn't have the application logic on the controller, so I created a method on the Travel model
def self.sum_food_expenses
…
Cássio Godinho
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Regarding concerns in Rails 4 (multiple engines)
Update!
I have sorted out the issue with the concerns, although I definitely appreciate the ClassMethods suggestion, as it seems to improve the code quality.
The issue with the concern was (and it was a dumb mistake) I removed a concern and…
Mylan Connolly
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1 answer
Rails Model - attr_accessor raise unknown method exception?
The short version (dummy code):
So I have one ActiveRecord (rails model) class:
class User < ActiveRecord::Base
attr_accessor :somevar
end
When I do
@u=User.find(1)
@u.somevar = 1
I get
undefined method `somevar=' for…
Andreas Storvik Strauman
- 1,615
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1 answer
Rails 4. Two model in view. Unknown number of object in second model
I have 2 models, for example model_1 and model_2.
Model_1 has_many model_2.
For model_1 I have "new" and "create" actions and one view for create objects of both models.
In view I used "form_for" for object model_1 and "fields_for" for object…
NYV
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1
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2 answers
Rails Model Associations for Item-Item Relationship?
Looking for some guidance on the best way to implement this scenario:
I have an items table (of products) and want to support the ability to cross-sell / up-sell / complement items. So there is an item-to-item(s) relationship here. In this join…
keruilin
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1 answer
Importing redefined SQL data from old app to new one
I've nearly finished rewriting (with some new features) my Symfony (left a bit bad taste in mounth) application into Rails. There is some amount of data which I need to import from my old application into the new Rails app.
Problem is that schema…
BlackTea
- 1,274
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1
vote
2 answers
Injecting form options and input tags from the model
How do I add options and fields to my form generated by a builder with form_for @user in the model? (ie. without touching the HTML)
The reason I want to do that is that I am adding a pluggable module to my model, and I want it to automatically (a)…
Jonathan Allard
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