So when you're outputting your collection as JSON you're seeing it represented as an object.Ī way to ignore the keys in the collection is to use values, so that a new collection is created (with ascending numeric keys i.e. In PHP, if your array keys aren't integers, in ascending order starting from 0, it is assumed to be an associative array. So in this case you'll be seeing the last item, first and the keys will be 9, 8, 7. The reverse method creates a new collection, but preserves the keys of the original collection. You're getting the same collection back, in reverse order. Now when you're doing: $eventi = \App\Model::with('relation_1', 'relation_2') The keys of the values in the underlying array will be numeric, i.e. You get a Collection object, containing those values. Method-3: Combining IN query with relationships. scores Score::where ('unitid', id) ->where ('createdat', '>', Carbon::now ()->subDays (3)) ->orderBy ('createdat', 'desc') ->take (20) ->get () scores scores->reverse () Done. Method-2: Prepending the whereIn method with the select method. Beware of N+1 issuesĬontinuing with our e-commerce example, let's say that we need to display the brand that each product belongs to.When you do this: $eventi = \App\Model::with('relation_1', 'relation_2') 5 Answers Sorted by: 29 Retrieving the last 20 items is quite easy. This technique is most effective in pages where you need to work with a ton of records, so you probably won't see a big change in memory usage/performance if you apply it to a page that fetches a few database records, nevertheless, it's still good to keep it in mind. This would make our query more efficient, this is especially important since the products' table would presumably contain a body column of type TEXT which could be quite large. You can reduce the amount of data by selecting only the columns you need: public function index() While doing this might seem reasonable (we are even paginating the results!), there may be a lot of information in our products' table that we don't need for a listing page (body, category id, product type, etc). 'products' => Products::query()->paginate()
Our controller would look something like this: public function index() env file As you know, Redis is an in-memory key-value database. I know we can use ->toSql () in laravel but sometimes I need it directly in the database manager to test it, whereas eloquent can't be executed in Database Manager of course because it is one of Laravel's features.
#Reverse query result eloquent laravel generator#
Add Redis configurations, and set the cache driver to use Redis (in the. I hope it's like a web generator or script or something where we just paste the eloquent and the result is an sql query. Let's say for example that we have an e-commerce website, and we want to display a list of products. In this article, we will see how does caching work with Redis in 2 simple steps: I assume you have both Laravel and Redis up and running on your local environment. The more data there is the more time it will take, but that's not all, all that data has to be stored in memory for the lifetime of the request and that can cause your server to slow down and run out of memory under heavy loads.įortunately, in Laravel, we can specify exactly the data we need. When you make a query, the data that the database returns is sent over the network. One way we can optimize a query is by reducing the amount of data we fetch from the database.
Here I some techniques that can improve your load times in your Laravel application. If there is more than one element that should be returned, an \Illuminate\Collections\MultipleItemsFoundException will be thrown.
Did you know that 1 in 4 visitors would abandon a website if it takes more than 4 seconds to load? While multiple factors can slow down a website, one common factor is inefficient database queries.Įloquent is a great tool that makes it easy to interact with the database in our Laravel applications, but sometimes we forget that what looks like a method call or property is running a database query under the hood, which might lead to slow page loads or high memory usage. If there are no elements in the collection that should be returned by the \Illuminate\Collections\ItemNotFoundException exception will be thrown.
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