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Questions tagged [rails-models]

a component of the Rails framework that holds the state of an object and is responsible for enforcing business rules and persisting the object.

367 questions
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How do I create two relationships to the same model with different names?

I have two Rails 4 models: Journey and Place. I would like a Journey two have two fields, origin and destination, that are both Places. My Journey class looks like this: class Journey < ActiveRecord::Base has_one :origin, class_name: :place …
Allan Lewis
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Ownership of models with Devise?

I'm using Devise for the first time with my Rails 4 project and I am trying to figure out how to lock down ownership of models to certain users. For example, if a user creates a model only that user should be able to do the following to it, list…
James McMahon
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Rails - model association for recursive user model relationship

In my user model, I have belongs_to :admin_creator, foreign_key: :created_by_user_id, class_name: "User" and in my create controller action I have... def create @user = User.new(user_create_params) @user.created_by_user_id =…
user1322092
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Rails - MVC - Should I move an external API call to the model?

I'm very new to rails and MVC development in general and have been working on an app which makes an external API call to bitly. I've place the following in the view to generate a shorturl which I then use for fb and twit. <% Bitly.use_api_version_3 …
Elliott de Launay
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Create action inside another controller

I am attempting to create a new User inside a controller for my Request class, but have having some difficulty. Below is my 'create' action inside my Requests controller. I realize I can't just call User.new, but am unsure how to structure the…
Bryon Finke
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ruby on rails multiple tables in one model

I am using Ruby on Rails and I have to create an importer from one database to another. There are over 100 tables in each database and I don't want to create a model for each table. Is there any possibility to create queries, specifying a table…
staskjs
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Using a method within model, calling it from view

I have an Update model which belongs to users. To show all of one user's friends' Updates, I am doing something like: Update.where("user_id" => [array_of_friend_ids]) I know the "right" way of doing things is to create a method to create the…
jenno
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Rails: uniqueness validation using array for scope

I'm doing a tags model where one of the attributes is the title of the tag. The goal is that there will be articles that can be tagged by a predefined set of topics: TOPICS = ['Politics', 'Art', 'Sports', 'Tech', 'Business', 'Science'] I would like…
Adler Santos
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Rails attachment on polymorphic model

I've tried many, many things so I'm not even sure which code/errors to give. I'll give my most generic code. Models: Job, Attachment Attachment - polymorphic association through attachable Job Model has_many :attachments, as:…
user2156026
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Rails user profile devise :has_many or :has_many_through relationships

I'm wracking my brain about how to start setting up the following set of model relationships in my project. I'm not looking for the complete solution (models, tables, migrations, etc), just a little help to get me going in the right direction. I…
Kyle Carlson
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Getting current_user's id in model

Forgive me if this is a newb question but I was wondering how they got the current user's id in the User model here: Listing 10.39 I've tried reading it again and again and i still can't figure it out :( class User < ActiveRecord::Base . . . …
Skyalchemist
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How to solve: validates.rb:96:in `rescue in block in validates': Unknown validator (...)

I'm start learning Rails, and I can't go forward because I'm getting a error when I try to run: bundle exec rspec spec/ I think the error is on my "models/users.rb" file: class User < ActiveRecord::Base attr_accessible :email, :name …
Paladini
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Query that joins child model results item erroneously shown multiple times

I have the following models, each a related child of the previous one (I excluded other model methods and declarations for brevity): class Course < ActiveRecord::Base has_many :questions scope :most_answered,…
daspianist
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Multi-layer sorting in Rails model

Im having trouble figuring out how to write a multi-layer sort using a scope method in my model, which can sort through the model's attributes, as well as its related child models' attributes? To put more concretely, I have the following models,…
daspianist
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Using scope to sort entries in related child models

I have three related models such as the following, each being the child of the one above: class Course < ActiveRecord::Base has_many :questions end class Question < ActiveRecord::Base belongs_to :course has_many: :answers default_scope…
daspianist
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