single-table-inheritance

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validate uniqueness amongst multiple subclasses with Single Table Inheritance

I have a Card model that has many CardSets and a CardSet model that has many Cards through a Membership model:[详细]

2023-01-02 21:24 分类：问答
How to get the DiscriminatorValue at run time

We have the following classes @Entity @Inheritance(strategy = InheritanceType.SINGLE_TABLE) // optional annotation as this is default[详细]

2023-01-02 16:30 分类：问答
ActiveRecord Validations for Models with has_many, belongs_to associations and STI

I have four models: User Award Badge GameWeek The associations are as follows: User has many awards. Award belongs to user.[详细]

2022-12-31 17:14 分类：问答
Organizing a lot of models that use STI in rails

I have a scenario where I am going to be creating a large number of models that use STI and I\'m wondering what the best way to organize this is.I already have othe开发者_C百科r models using STI and I[详细]

2022-12-30 21:13 分类：问答
using STI and ActiveRecordBase<> with full FindAll

Is it possible to use generic support with single table inheritance, and still be able to FindAll of the base class?[详细]

2022-12-29 13:13 分类：问答
Modeling a cellphone bill: should I use single-table inheritance or polymorphic associations?

In my domain: Users have many Bills Bills have many BillItems (and therefore Users have many BillItems through Bills)[详细]

2022-12-27 07:18 分类：问答
Adding STI to Existing Table

I want to add STI to an existing table using a custom type column.Let\'s call this taste_type whose corresponding model is Fruit.[详细]

2022-12-26 16:39 分类：问答
STI and polymorphs

I have pro开发者_JAVA技巧blem with my code class Post < ActiveRecord::Base end class NewsArticle < Post[详细]

2022-12-26 09:08 分类：问答
How to return children objects?

I have -- what I think -- is a simple question.Here\'s my code: class开发者_如何转开发 Fruit < ActiveRecord::Base[详细]

2022-12-26 08:29 分类：问答
Is it OK to have multiple ActiveRecord `belongs_to` pointing to the same class?

In linking a sports event to two teams, at first this seemed to make sense: events - id:integer - integer:home_team_id[详细]

2022-12-25 08:10 分类：问答