By utilizing cache contexts for language, Drupal can cache different versions of the same page based on the user’s language preference. Each page can be displayed in different languages, and content translation is managed through Drupal’s translation system. Example: Let us suppose our site having multilingual support. This ensures that each user sees their personalized recommendations while still benefiting from caching for other static elements on the page. For example, a block containing user-specific recommendations can have cacheability metadata with a cache context for the user’s role. By leveraging cache contexts, Drupal can serve personalized content while still benefiting from caching. This ensures that users see the updated product information when they visit the corresponding product page.Ĭache Contexts: Cache contexts allow Drupal to vary cache entries based on different conditions, such as user roles, languages, or device types.
When a product’s price or description is modified, Drupal automatically invalidates the cache entries related to that product’s cache tag. Each product node is associated with a specific cache tag.
For example, when a node is updated, Drupal invalidates cache entries associated with that node’s cache tag, ensuring that the updated content is delivered.Įxample: Suppose in our site we have a product catalog. They allow Drupal to invalidate related cache entries when changes occur efficiently. Cache tags identify the entities or elements that affect the cached content, cache contexts define the variations in the cached content based on contextual information, and cache max-age specifies how long the cache entry is considered valid.Ĭache Tags: Cache tags are a type of strings.
Additionally, Drupal defines cache bins as logical storage containers for cached data. The cache storage is typically used to store various types of data, including rendered HTML, configuration, database query results, and more. Various Stages are as follows :-Īt this stage, Drupal stores the generated content or data inside the cache storage backend, such as the database or a caching system like Redis or Memcached (i.e. In this blog, I will dive deep into the cache life cycle in Drupal 9, exploring its key stages and highlighting best practices to maximise caching benefits.
#Drupal 9 cache contexts full#
Here's where the cache ID for the request's route collection is generated ( link to the full source.Cache Life cycle is important to understand as it plays an important role in optimising the performance and scalability of web applications. What I did not know is that the route provider in Drupal creates a cache ID based on the path and language code, only. That makes sense, it can be an expensive process to say /foo is actually an alias of /node/1 and should go to the entity view controller. In this episode of "Matt does ridiculous things with Drupal," I found out that the inbound processing of a path and the lookup for its route gets cached.
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