Is it possible to use delegate with has_many or has_one association in a polymorphic model? How does that work? class Generic < ActiveRecord::Base ... belongs_to :generable, polymorphic: tru...

Introduction: I have these Tables with their Models: addresses table --> Address model users table --> User model companies table --> Company model properties table --> Property model ...

The recommended way to handle polymorphic associations in Phoenix seems to be adding an intermediate schema that contains the references to the other schemas: Inverse polymorphic with ecto https:...

I have a table which stores comments, the comment can either come from another user, or another profile which are separate entities in this app. My original thinking was that the table would have...

class Transaction < ActiveRecord::Base belongs_to :account, :polymorphic => true end class Bankaccount < ActiveRecord::Base has_many :transactions, :as => :account end class Creditc...

I have a Products table and want to add a column: t.references :imageable, :polymorphic => true I was trying to generate migration for this by doing: $ rails generate migration AddImageableT...

Say we have two classes that each implement an interface, IParent, as follows: public class Foo : IParent { public long Id { get; set; } ... public IList<Child> Children { get; set; } .....

If I have a polymorphic association between 3 models as: Comment belongs_to :book, :class_name => 'Book', :foreign_key => 'ref_id', conditions: "comments.ref_type = 'Book'" belongs_to :art...

So I have an app with a 2 different models, Comments and Replies, each of which you can either Agree or Disagree, so I have a polymorphic model called Emotion. Here is my code for these: class Com...

I am using PostgreSQL 9.5 (but upgrade is possible to say 9.6). I have permissions table: CREATE TABLE public.permissions ( id integer NOT NULL DEFAULT nextval('permissions_id_seq'::regclass), ...

I need some help with doctrine 2 that uses "polymorphic associations". Let me clarify myself. Entitys can support file attachments using a subset of the polymorphic relationship. the File entity is...

I can eager load polymorphic relations/models without any n+1 issues. However, if I try to access a model related to the polymorphic model, the n+1 problem appears and I can't seem to find a fix. H...

I have a table with a polymorphic reference that I generated via the following migration: def change add_reference :table_name, :thing, polymorphic: true, index: true end When I ran the migra...

I have the same exact schema as described here with a polymorphic join table: http://aaronvb.com/articles/a-polymorphic-join-table.html class Location < ActiveRecord::Base has_many :note_joins...

I am using a legacy database, so i do not have any control over the datamodel. They use a lot of polymorphic link/join-tables, like this create table person(per_ident, name, ...) create table per...

I read this interesting article about Using Polymorphism to Make a Better Activity Feed in Rails. We end up with something like class Activity < ActiveRecord::Base belongs_to :subject, polymo...

I'm trying to learn how to use polymorphic associations in my Rails 5 app. I recently asked this question, but I edited it so many times to show all the things I was trying, it has become messy I ...

I'm trying to learn how to use polymorphic associations in my Rails 5 app. I have models called Organisation, Proposal and Package::Bip. The associations are: Organisation has_many :bips, as:...

I have a legacy database that has a few tables which were designed using Polymorphic Associations. By polymorphic associations, I mean that those tables can be child of different tables according t...

Is it posible to validate the uniqueness of a child model's attribute scoped against a polymorphic relationship? For example I have a model called field that belongs to fieldable: class Field &lt...

I have this fixture: resource: name: my resource owner: user_1 (User) Resource is defined like this: class Resource < ActiveRecord::Base belongs_to :owner, :polymorphic => true User ...

I'm trying to add an Evaluation model to my Rails 4 app. I have made a model called evaluation.rb. It has: class Evaluation < ActiveRecord::Base belongs_to :evaluator, :polymorphic => tru...

A Person can have many Events and each Event can have one polymorphic Eventable record. How do I specify the relationship between the Person and the Eventable record? Here are the models I have: ...

I am making an application with the mean.js boilerplate. It is a recruitment engine with users as employers and candidates. Now Employers and candidates should be stored as separate documents and e...

I have few models in my Rails application, which are: User Photo Album Comment I need to make comments belog to either to Photo or Album, and obviously always belong to User. I'm going to use p...