Laravel 的查询语句构造器也能处理这些。让我们先来看下一个在括号中将约束分组的例子:DB::table('users') ->where('name', '=', 'John') ->orWhere(function ($query) { $query->where('votes', '>', 100) ->where('title', '<>', 'Admin'); }) ->get();如你
$role = $request->input('role'); $users = DB::table('users') ->when($role, function ($query) use ($role) { return $query->where('role_id', $role); }) ->get();只有当 when 方法的第一个参数为 true 时,闭包里的 where 语句才会执行。如果第一个参数是 false,这个闭包将不会被...
The Laravel query builder can handle these as well:1DB::table('users') 2 ->where('name', '=', 'John') 3 ->orWhere(function($query) 4 { 5 $query->where('votes', '>', 100) 6 ->where('title', '<>', 'Admin'); 7 }) 8 ->get();...
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...
[ new CaseRule(new Value("Admin"), new Equal("role", new Value(3))), new CaseRule(new Value("Editor"), new Equal("role", new Value(2))), new CaseRule(new Value("Viewer"), new Equal("role", new Value(1))) ], else: new Value("Unknown Role") ), "role_name" ) ]) -...
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...userMapper.selectUserAndOrdersByUserId(1); System.out.println(user.getOrders().size()); session.close(); } 3、多对多... 这里我们以用户 user 表和 角色role 表为例,假定一个用户能被分配成多重角色,而一种角色也能分给多个用户,故用户和角色构成多对多的关系。 ...session.getMapper(UserMap...
$result= Requent::resource(app(User::class)->where('role','admin') ) ->transformBy(UserTransformer::class) ->keyBy('users') ->get(); We'll walk-through all the available methods and features thatRequentoffers. Let's continue.
1$role = $request->input('role'); 2 3$users = DB::table('users') 4 ->when($role, function (Builder $query, string $role) { 5 $query->where('role_id', $role); 6 }) 7 ->get();The when method only executes the given closure when the first argument is true. If the ...
After Eloquent query, you can modify rows by usingmap()function in Collections. $users=User::where('role_id',1)->get()->map(function(User$user){ $user->some_column=some_function($user); return$user; }); However, this is not adviseable for bigger amount of data, cause you're down...