Is this one database query or two? Is where allowed after get() in Laravel eloquent?

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Is where allowed after get() in Laravel eloquent? Is this one database query or two?

Student::where('rank_id',1)->get()->where('id',29152);

This part Student::where('rank_id',1)->get() will perform a query into the database and the ->where('id',29152); will filter the collection already retrieved without make another query.

https://laravel.com/docs/5.7/collections#method-where

Database: Query Builder - Laravel, $users = DB::table('users') ->whereIn('id', [1, 2, 3]) ->get();. The whereNotIn method verifies that the given column's value is not contained in the given array: $� Laravel's database query builder provides a convenient, fluent interface to creating and running database queries. It can be used to perform most database operations in your application and works on all supported database systems. The Laravel query builder uses PDO parameter binding to protect your application against SQL injection attacks.

Yes, it is allowed as Student::where('rank_id',1)->get() returns collection and you can chain results of collection using where.

Refer to Illuminate>Support>Collection.php for details of functions that can be used on a collection

Eloquent: Getting Started - Laravel, Models allow you to query for data in your tables, as well as insert new records into the table. Before getting started, be sure to configure a database connection in Since Eloquent models are query builders, you should review all of the methods For Eloquent methods like all and get which retrieve multiple results, an� The Eloquent ORM included with Laravel provides a beautiful, simple ActiveRecord implementation for working with your database. There are two other methods

Laravel connects to different databases uses connections. So until you are not specifying any connection :

  1. By explicitly calling DB::connection()
  2. Or by specifying protected $connection= 'second_db_connection'; in any of your eloquent models

You are basically dealing with just one default connection which means one database.

In your query Student::where('rank_id',1)->get()->where('id',29152), it should be :

Student::where('rank_id',1)->where('id',29152)->get();

It's the syntax used by query builder, which is in the format. ->get() is used to apply the selections and filters you have applied on a query. So where should be before get().

See documentation for more help.

Database: Getting Started - Laravel, Configuration; Read & Write Connections; Using Multiple Database Connections of database backends using either raw SQL, the fluent query builder, and the Eloquent ORM. After creating a new SQLite database using a command such as touch Sometimes you may wish to use one database connection for SELECT� When you dump the above-given laravel eloquent join 3 table query, you will get the following SQL query: select `users`.*, `posts`.`descrption` from `users` inner join `posts` on `posts`.`user_id` = `users`.`id` inner join `comments` on `comments`.`post_id` = `posts`.`id` Example 3: Laravel Eloquent Join() with Multiple Conditions. In this

Basic Database Usage - Laravel, Sometimes you may wish to use one database connection for SELECT be used whether you are using raw queries, the query builder, or the Eloquent ORM. Note that two keys have been added to the configuration array: read and write . To get an array of the executed queries, you may use the getQueryLog method: Laravel memory exception 'Database/Connection.php:301' Tag: php , mysql , laravel , laravel-4 , eloquent I got a strange bug going down here, sometimes select queries dies from a memory exception.

Eloquent ORM - Laravel, Before getting started, be sure to configure a database connection in app/config/ database.php . if a model is not found, allowing you to catch the exceptions using an App::error Of course, you may also use the query builder aggregate functions. User::destroy(1); User::destroy(array(1, 2, 3)); User::destroy(1, 2, 3);. Laravel is the most popular open-source PHP framework. So, today we will be talking about the most frequently asked questions about Laravel.

Eloquent: Relationships - Laravel, Before getting started, be sure to configure a database connection in config/ database.php . After saving or creating a new model that uses auto- incrementing IDs, you may retrieve the ID by Scopes allow you to easily re-use query logic in your models. Of course, you may eager load multiple relationships at one time: Teams. Q&A for Work. Stack Overflow for Teams is a private, secure spot for you and your coworkers to find and share information.

Comments
  • One should add that it is preferred to use where() on the query builder than on collections where possible as performance of database queries is normally a lot better. What's best depends on the exact use case and other details.
  • It will be one query as your chaining on collection the part before where('id',29152); gets you database results.