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This article mainly shows you how to use the with method in laravel. The content is simple, easy to understand and clearly organized. I hope it can help you solve your doubts. Let Xiaobian lead you to study and learn the article "How to use the with method in laravel".

In laravel, the with() method is used as "eager loading", indicating that laravel will be preloaded with the exact association relationship of the main model. Using this method can alleviate the "1+N" query problem, and only "1+1" queries are needed to solve the problem.

Operating environment: Windows 10 system, Laravel version 6, Dell G3 computer.

How to use laravel with method

with()

The with() method is used as a "craving load," which basically means that laravel will be preloaded with the exact relationships associated with the main model. This is very helpful if you want to add all the associations to a model. Because "eager loading" alleviates 1+N query problems, it only takes 1+1 queries to solve the problem, which has a qualitative improvement in query speed.

For example:

user > hasMany > post$users = User::with('posts')->get();foreach($users as $user){ $users->posts; // posts has been loaded, no DB queries added}

Expansion:

has()

The has() method filters the query results of the model based on the association relationship, so its role is very similar to the where condition. If you only use has ('post '), that means you only want to get this model, which has at least one post associated with it.

For example:

user > hasMany > post//User has at least one post association $users = User::has ('post ')->get();

You can also use ". "to construct nested has statements.

For example:

user > hasMany > post$user = User::has ('post. votes','>', '3')->get(); The above is "How to use the with method in laravel" All the content of this article, thank you for reading! I believe that everyone has a certain understanding, hope to share the content to help everyone, if you still want to learn more knowledge, welcome to pay attention to the industry information channel!

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