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EasyCache

A simple on demand caching extension for Laravel.

Works similar to paginate() or get() extending to also allow cache().

Install

composer require websanova/easycache

Examples

Models:

$item = Item::cache($id);            // Get via integer.
$item = Item::cache($val);           // Get via string value.
$item = Item::cache($email, 'email') // Get from cache via email `$passthrough`.

Collections:

$items = Item::cache();         // Paginated, using `$perPage`.
$items = Item::cache(true, 40); // Paginated with custom.
$items = Item::cache(false);    // No pagination (`get`).

Queries:

We can also build the queries as we would normally.

$items = Item::active()->user()->cache();

$item = Item::cache($id);
$comments = $item->comments()->active()->cache();

Note the methods active and user, comments are all arbitrary.

Flush, Reset, Recount:

We also have some helper methods that work both on models and collections.

$item->flush();                      // Flush item.
$items->flush();                     // Flush all items.
$item->comments()->cache()->flush(); // Flush all comments.

$item->recount('comments_total');    // Reset `comments_total`.

$items->reset();                     // Flush and re-cache items.

Setup

Trait:

The extension comes as a trait so just include it on any model you want to use it.

class Item extends \Illuminate\Database\Eloquent\Model
{
    use \Websanova\EasyCache\EasyCache;

    ...
}

Usually it's best to just create a BaseModel and include it once there.

Caching:

You may be wondering at this point how do I control what is cached. This is controlled by a property called cacheBy set to id by default.

Based on this value the cache() method will call a function (or scope) by this name. In this method you specify what actually gets cached.

class Item extends \Illuminate\Database\Eloquent\Model
{
    use \Websanova\EasyCache\EasyCache;

    public function id()
    {
        return $this->select('id', 'slug', 'name')
                    ->active()
                    ->with('user');
    }

    ...
}

I like to use a plain id() method. But it's also useful to set it as scopeId for re-use when not using cache.

Note because the id() method actually controls the data we don't need to specify any select parameters in our query builders. The cache will work off the cacheBy field only.

Methods

cache() passthrough

Sometimes we will want to get an item from cache which is stored by id but through a different field. A good example is getting a user by an email or facebook_id. We don't want to cache the same data twice. This will do a quick look up first using the passthrough field before fetching the model by id.

User::cache('[email protected]', 'email');

---

public function id()
{
    ...
}

public function email()
{
    return $this;
}

The passthrough field will try to find a method by the same name where you can specify additional parameters for the look up. If you don't have any just return $this.

flush()

This works just as the Cache::flush() method. It will just remove the item from the cache. It also works on collections.

$item = Item::cache($id);

$item->flush();
$item->comments()->cache()->flush();

reset()

Flushes item(s) from cache and calls them again. This performs a full reset of the model(s) in the cache.

$item = Item::cache($id);

$item->reset();
$item->comments()->cache()->reset();

recount()

Actually this one has nothing to do with caching but it's a common feature I use along with flush and reset.

It performs a full recount rather than an increment or decrement. This is for more accurate counting as total counts can be off easily when errors occur. Perhaps not needed on each request but also useful in a command to reset totals.

$item = Item::cache($id);

$item->recount('comments_total');                    // Will use `comments()` relation.
$item->recount('comments_total', 'commentsRecount'); // Specify relation to use for count.

recache()

This just overwrites an item in the cache. Useful for increments and decrements. Note this is not available with collections.

$item = Item::cache($id);

$item->comments_total += 1;
$item->recache();

cacheInc()

This works similar to the Laravel increment() method. However in this case we increment the value in the cache and only perform a save operation.

$item = Item::cache($id);

$item->cacheInc('comments_total');

We can also increment by a number and also specify a factor by which to perform the actual save.

$item->cacheInc('comments_total', 1, 10);

In this case we would do the save only once every ten times.

cacheDec()

Calls the cacheInc() method but as a negative value.

$item = Item::cache($id);

$item->cacheDec('comments_total');

Note that you should supply a positive number and cacheDec will pass it as a negative for you.

cacheOrFail()

Similar to findOrFail() except that it works in conjunction with the cached items. Small difference is that it only works for models and not collections (for now).

Item::cacheOrFail($id);

It also throws the same ModelNotFoundException as findOrFail if a model is not found.

Note that if the model is not cached, it will cache it first then return it.

There is also a second parameter for a set or arguments it can receive. This is in case you want to keep a more loose set of models in your cache. For instance without status, so that all "active", "pending", etc items get cached. This allows you to set additional parameters which are useful when route model binding for one. You can set additional parameters for strictness there.

Item::cacheOrFail($id, [
    'status' => 'active'
    ...
]);

Parameters

cached

This is mostly used for testing but is convenient to look up to know whether the model is actually from the cache or not.

cacheKey

This field is set by default using the getTable() method. However you can overwrite it in case you have some more complicated class structure in your models.

It will cache the items using this key like so:

Cache::tags('items')->put('items-id-14', $model, $this->cacheTime);
Cache::tags('items')->put('items-slug-en', $model, $this->cacheTime);

cacheTime

The length of time the items stays in the cache. It's best to set this in a BaseModel with appropriate overwrites.

cacheBy

The field which we will cache by set to id by default.

Appending

In some cases we will to have some additional data come along with our query which is not stored in the cache.

We want to be able to take advantage of the way Eloquent automatically builds our relationships when using with. This is useful in a case such as a users score on some item. We can store the items in cache but not the user score (at least not along with the item).

We can simply include this in our query and the cache method will automatically build it for us.

$items = Item::active()->orderBy('created_at')->with('score')->cache();

This will perform just one query for getting the score rather than multiple queries if we didn't include it in the query beforehand.

License

Laravel Easy Cache is licensed under The MIT License (MIT).