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Replace cache_key with cache_key_with_version on caching_with_rails guides [ci skip]

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tnantoka 2018-11-16 10:20:27 +09:00
parent b5302d5a82
commit 96a31c41af
1 changed files with 3 additions and 3 deletions
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6
guides/source/caching_with_rails.md
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@ -302,7 +302,7 @@ class Product < ApplicationRecord
end
```
NOTE: Notice that in this example we used the `cache_key` method, so the resulting cache key will be something like `products/233-20140225082222765838000/competing_price`. `cache_key` generates a string based on the model's `id` and `updated_at` attributes. This is a common convention and has the benefit of invalidating the cache whenever the product is updated. In general, when you use low-level caching for instance level information, you need to generate a cache key.
NOTE: Notice that in this example we used the `cache_key_with_version` method, so the resulting cache key will be something like `products/233-20140225082222765838000/competing_price`. `cache_key_with_version` generates a string based on the model's `id` and `updated_at` attributes. This is a common convention and has the benefit of invalidating the cache whenever the product is updated. In general, when you use low-level caching for instance level information, you need to generate a cache key.
### SQL Caching
@ -563,7 +563,7 @@ class ProductsController < ApplicationController
# If the request is stale according to the given timestamp and etag value
# (i.e. it needs to be processed again) then execute this block
if stale?(last_modified: @product.updated_at.utc, etag: @product.cache_key)
if stale?(last_modified: @product.updated_at.utc, etag: @product.cache_key_with_version)
respond_to do |wants|
# ... normal response processing
end
@ -577,7 +577,7 @@ class ProductsController < ApplicationController
end
```
Instead of an options hash, you can also simply pass in a model. Rails will use the `updated_at` and `cache_key` methods for setting `last_modified` and `etag`:
Instead of an options hash, you can also simply pass in a model. Rails will use the `updated_at` and `cache_key_with_version` methods for setting `last_modified` and `etag`:
```ruby
class ProductsController < ApplicationController