caching-strategies

Name: caching-strategies
Author: ThibautBaissac

41installs79forks

How to install caching-strategies?

thibautbaissac/rails_ai_agents/caching-strategies

$npx -y skills add ThibautBaissac/rails_ai_agents --skill caching-strategies

Installs into the current project.

Summary

Implements Rails caching patterns for performance optimization. Use when adding fragment caching, Russian doll caching, low-level caching, cache invalidation, or when user mentions caching, performance, cache keys, or memoization. WHEN NOT: General query optimization (use perform

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SKILL.md

1	# Caching Strategies for Rails 8
2
3	## Overview
4
5	Rails provides multiple caching layers:
6	- Fragment caching: Cache view partials
7	- Russian doll caching: Nested cache fragments
8	- Low-level caching: Cache arbitrary data
9	- HTTP caching: Browser and CDN caching
10	- Query caching: Automatic within requests
11
12	## Quick Start
13
14	```ruby
15	# config/environments/development.rb
16	config.action_controller.perform_caching = true
17	config.cache_store = :memory_store
18
19	# config/environments/production.rb
20	config.cache_store = :solid_cache_store # Rails 8 default
21	# OR
22	config.cache_store = :redis_cache_store, { url: ENV["REDIS_URL"] }
23	```
24
25	Enable caching in development:
26	```bash
27	bin/rails dev:cache
28	```
29
30	## Cache Store Options
31
32	\| Store \| Use Case \| Pros \| Cons \|
33	\|-------\|----------\|------\|------\|
34	\| `:memory_store` \| Development \| Fast, no setup \| Not shared, limited size \|
35	\| `:solid_cache_store` \| Production (Rails 8) \| Database-backed, no Redis \| Slightly slower \|
36	\| `:redis_cache_store` \| Production \| Fast, shared \| Requires Redis \|
37	\| `:file_store` \| Simple production \| Persistent, no Redis \| Slow, not shared \|
38	\| `:null_store` \| Testing \| No caching \| N/A \|
39
40	## Fragment Caching
41
42	### Basic Fragment Cache
43
44	```erb
45	<%# app/views/events/_event.html.erb %>
46	<% cache event do %>
47	<article class="event-card">
48	<h3><%= event.name %></h3>
49	<p><%= event.description %></p>
50	<time><%= l(event.event_date, format: :long) %></time>
51	<%= render event.venue %>
52	</article>
53	<% end %>
54	```
55
56	### Cache Key Components
57
58	Rails generates cache keys from:
59	- Model name
60	- Model ID
61	- `updated_at` timestamp
62	- Template digest (automatic)
63
64	```ruby
65	# Generated key example:
66	# views/events/123-20240115120000000000/abc123digest
67	```
68
69	### Custom Cache Keys
70
71	```erb
72	<%# With version %>
73	<% cache [event, "v2"] do %>
74	...
75	<% end %>
76
77	<%# With user-specific content %>
78	<% cache [event, current_user] do %>
79	...
80	<% end %>
81
82	<%# With explicit key %>
83	<% cache "featured-events-#{Date.current}" do %>
84	<%= render @featured_events %>
85	<% end %>
86	```
87
88	## Russian Doll Caching
89
90	Nested caches where inner caches are reused when outer cache is invalidated:
91
92	```erb
93	<%# app/views/events/show.html.erb %>
94	<% cache @event do %>
95	<h1><%= @event.name %></h1>
96
97	<section class="vendors">
98	<% @event.vendors.each do \|vendor\| %>
99	<% cache vendor do %>
100	<%= render partial: "vendors/card", locals: { vendor: vendor } %>
101	<% end %>
102	<% end %>
103	</section>
104
105	<section class="comments">
106	<% @event.comments.each do \|comment\| %>
107	<% cache comment do %>
108	<%= render comment %>
109	<% end %>
110	<% end %>
111	</section>
112	<% end %>
113	```
114
115	Use `touch: true` on `belongs_to` associations to cascade invalidation up the chain. See [cache-invalidation.md](references/cache-invalidation.md) for examples.
116
117	## Collection Caching
118
119	### Efficient Collection Rendering
120
121	```erb
122	<%# Caches each item individually %>
123	<%= render partial: "events/event", collection: @events, cached: true %>
124
125	<%# With custom cache key %>
126	<%= render partial: "events/event",
127	collection: @events,
128	cached: ->(event) { [event, current_user.admin?] } %>
129	```
130
131	## Low-Level Caching
132
133	Use `Rails.cache.fetch` with a block for the most common pattern. See [low-level-caching.md](references/low-level-caching.md) for:
134	- Basic read/write/fetch examples
135	- Caching in service objects
136	- Caching in query objects
137	- Instance variable memoization
138	- Request-scoped memoization with `CurrentAttributes`
139
140	## Cache Invalidation
141
142	Three strategies: time-based expiration, key-based expiration (using `updated_at`), and manual deletion. See [cache-invalidation.md](references/cache-invalidation.md) for:
143	- Time-based and key-based expiration
144	- Manual invalidation in model callbacks and services
145	- Pattern-based deletion (`delete_matched`)
146	- `touch: true` for Russian doll cascade
147	- Built-in and custom counter caches
148
149	## HTTP Caching
150
151	Use `stale?` for conditional GET (ETags/Last-Modified) and `expires_in` for Cache-Control headers. See [http-caching-and-testing.md](references/http-caching-and-testing.md) for full examples.
152
153	## Testing Caching
154
155	Use a `:caching` metadata tag to enable caching in specs. See [http-caching-and-testing.md](references/http-caching-and-testing.md) for:
156	- `rails_helper.rb` configuration
157	- Testing cached view invalidation
158	- Testing cache invalidation in services
159	- Performance monitoring and instrumentation
160
161	## Checklist
162
163	- [ ] Cache store configured for environment
164	- [ ] Fragment caching on expe

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6 picks

Type

caching-strategies

41installs79forks

View on GitHub

How to install caching-strategies?

thibautbaissac/rails_ai_agents/caching-strategies

$npx -y skills add ThibautBaissac/rails_ai_agents --skill caching-strategies

Installs into the current project.

Summary

Files · 1

View on GitHub

SKILL.md

1	# Caching Strategies for Rails 8
2
3	## Overview
4
5	Rails provides multiple caching layers:
6	- Fragment caching: Cache view partials
7	- Russian doll caching: Nested cache fragments
8	- Low-level caching: Cache arbitrary data
9	- HTTP caching: Browser and CDN caching
10	- Query caching: Automatic within requests
11
12	## Quick Start
13
14	```ruby
15	# config/environments/development.rb
16	config.action_controller.perform_caching = true
17	config.cache_store = :memory_store
18
19	# config/environments/production.rb
20	config.cache_store = :solid_cache_store # Rails 8 default
21	# OR
22	config.cache_store = :redis_cache_store, { url: ENV["REDIS_URL"] }
23	```
24
25	Enable caching in development:
26	```bash
27	bin/rails dev:cache
28	```
29
30	## Cache Store Options
31
32	\| Store \| Use Case \| Pros \| Cons \|
33	\|-------\|----------\|------\|------\|
34	\| `:memory_store` \| Development \| Fast, no setup \| Not shared, limited size \|
35	\| `:solid_cache_store` \| Production (Rails 8) \| Database-backed, no Redis \| Slightly slower \|
36	\| `:redis_cache_store` \| Production \| Fast, shared \| Requires Redis \|
37	\| `:file_store` \| Simple production \| Persistent, no Redis \| Slow, not shared \|
38	\| `:null_store` \| Testing \| No caching \| N/A \|
39
40	## Fragment Caching
41
42	### Basic Fragment Cache
43
44	```erb
45	<%# app/views/events/_event.html.erb %>
46	<% cache event do %>
47	<article class="event-card">
48	<h3><%= event.name %></h3>
49	<p><%= event.description %></p>
50	<time><%= l(event.event_date, format: :long) %></time>
51	<%= render event.venue %>
52	</article>
53	<% end %>
54	```
55
56	### Cache Key Components
57
58	Rails generates cache keys from:
59	- Model name
60	- Model ID
61	- `updated_at` timestamp
62	- Template digest (automatic)
63
64	```ruby
65	# Generated key example:
66	# views/events/123-20240115120000000000/abc123digest
67	```
68
69	### Custom Cache Keys
70
71	```erb
72	<%# With version %>
73	<% cache [event, "v2"] do %>
74	...
75	<% end %>
76
77	<%# With user-specific content %>
78	<% cache [event, current_user] do %>
79	...
80	<% end %>
81
82	<%# With explicit key %>
83	<% cache "featured-events-#{Date.current}" do %>
84	<%= render @featured_events %>
85	<% end %>
86	```
87
88	## Russian Doll Caching
89
90	Nested caches where inner caches are reused when outer cache is invalidated:
91
92	```erb
93	<%# app/views/events/show.html.erb %>
94	<% cache @event do %>
95	<h1><%= @event.name %></h1>
96
97	<section class="vendors">
98	<% @event.vendors.each do \|vendor\| %>
99	<% cache vendor do %>
100	<%= render partial: "vendors/card", locals: { vendor: vendor } %>
101	<% end %>
102	<% end %>
103	</section>
104
105	<section class="comments">
106	<% @event.comments.each do \|comment\| %>
107	<% cache comment do %>
108	<%= render comment %>
109	<% end %>
110	<% end %>
111	</section>
112	<% end %>
113	```
114
115	Use `touch: true` on `belongs_to` associations to cascade invalidation up the chain. See [cache-invalidation.md](references/cache-invalidation.md) for examples.
116
117	## Collection Caching
118
119	### Efficient Collection Rendering
120
121	```erb
122	<%# Caches each item individually %>
123	<%= render partial: "events/event", collection: @events, cached: true %>
124
125	<%# With custom cache key %>
126	<%= render partial: "events/event",
127	collection: @events,
128	cached: ->(event) { [event, current_user.admin?] } %>
129	```
130
131	## Low-Level Caching
132
133	Use `Rails.cache.fetch` with a block for the most common pattern. See [low-level-caching.md](references/low-level-caching.md) for:
134	- Basic read/write/fetch examples
135	- Caching in service objects
136	- Caching in query objects
137	- Instance variable memoization
138	- Request-scoped memoization with `CurrentAttributes`
139
140	## Cache Invalidation
141
142	Three strategies: time-based expiration, key-based expiration (using `updated_at`), and manual deletion. See [cache-invalidation.md](references/cache-invalidation.md) for:
143	- Time-based and key-based expiration
144	- Manual invalidation in model callbacks and services
145	- Pattern-based deletion (`delete_matched`)
146	- `touch: true` for Russian doll cascade
147	- Built-in and custom counter caches
148
149	## HTTP Caching
150
151	Use `stale?` for conditional GET (ETags/Last-Modified) and `expires_in` for Cache-Control headers. See [http-caching-and-testing.md](references/http-caching-and-testing.md) for full examples.
152
153	## Testing Caching
154
155	Use a `:caching` metadata tag to enable caching in specs. See [http-caching-and-testing.md](references/http-caching-and-testing.md) for:
156	- `rails_helper.rb` configuration
157	- Testing cached view invalidation
158	- Testing cache invalidation in services
159	- Performance monitoring and instrumentation
160
161	## Checklist
162
163	- [ ] Cache store configured for environment
164	- [ ] Fragment caching on expe

People who liked this also viewed

6 picks

Type