本书介绍了如何使用 Laravel 4 设计模式开发不同的应用程序并解决重复出现的问题。它将引导您了解广泛使用的设计模式——生成器(管理器)模式、工厂模式、存储库模式和策略模式,并将使您能够在使用 Laravel 开发各种应用程序时使用这些模式。本书将帮助您找到稳定和可接受的解决方案,从而提高应用程序的质量。 在本书的...
Eager Loading Specific ColumnsYou may not always need every column from the relationships you are retrieving. For this reason, Eloquent allows you to specify which columns of the relationship you would like to retrieve:1$users = App\Book::with('author:id,name')->get();...
Using an Expression instance will prevent Laravel from wrapping the value in quotes and allow you to use database specific functions. One situation where this is particularly useful is when you need to assign default values to JSON columns:1<?php 2 3use Illuminate\Support\Facades\Schema; 4...
Upserting with specific columns Maatwebsite\Excel\Concerns\WithValidation Validates each row against a set of rules. Row Validation Maatwebsite\Excel\Concerns\SkipsEmptyRows Skips empty rows. Row Validation Maatwebsite\Excel\Concerns\SkipsOnFailure Skips on validation errors. Row Validation Maatwebsite...
注意在这里我们使用了laravel5提供的route model binding特性,我们在控制器中使用Task类typehinting了task参数,而该task参数,而该task参数和routes.php中定义的wildcast路由Route::get('tasks/{task}','xxx'}定义的task相匹配,因此laravel在调用我们的控制器时自动注入Task模型(以id为索引)。这个功能后续再做进一步的...
This command generates a model file in the app directory. You can use this model to interact with the database table. Step 5: Create the Route Laravel uses routes to map URLs to specific controller actions. Define your routes in theroutes/web.phpfile. For a CRUD operation, you typically ...
Performs a modulo operation on the value of a field and selects documents with a specified result. AI检测代码解析 User::where('age', 'mod', [10, 0])->get(); 1. MongoDB-specific Geo operations Near AI检测代码解析 $bars = Bar::where('location', 'near', [ ...
Sometimes you don't need whole tree to be loaded and just some subtree of specific node. It is show in following example: AI检测代码解析 $root = Category::descendantsAndSelf($rootId)->toTree()->first(); 1. In a single query we are getting a root of a subtree and all of its desce...
disallow($user)->toManage(Post::class); Bouncer::disallow($user)->toOwn(Post::class); // Adding & removing abilities for roles Bouncer::allow('admin')->to('ban-users'); Bouncer::disallow('admin')->to('ban-users'); // You can also forbid specific abilities with the same syntax....
This example also demonstrates how toexchange a short-lived access token with a long-lived access tokenand save the user to youruserstable if the entry doesn't exist. Finally it will log the user in using Laravel's built-in user authentication. ...