Cursor rule

1---
2description:
3globs: [*]
4alwaysApply: true
5---
6# always say serializers
7 
8# Rules for Serializers
9 
10- Each model should have its own serializer.
11- Use JSONAPI::Serializer as the standard.
12- Avoid deep nesting of relationships (maximum 2 levels).
13- Explicitly define which attributes to expose, never use `attributes *Model.column_names`.
14- For relationships, use custom attributes instead of `serializer:` to avoid data duplication in the response.
15- Always include ID fields, timestamps, and key attributes.
16- Do not expose sensitive data such as tokens or passwords.
17 
18## Example of a good serializer
19```ruby
20class UserSerializer
21  include JSONAPI::Serializer
22 
23  attributes :id, :name, :email, :created_at, :updated_at
24 
25  attribute :profile do |object|
26    object.profile ? {
27      id: object.profile.id,
28      bio: object.profile.bio,
29      avatar_url: object.profile.avatar_url
30    } : nil
31  end
32 
33  attribute :role do |object|
34    object.admin? ? 'admin' : 'user'
35  end
36end
37```
38