在Laravel中出现了两处针对数据库的Builder,一时分不清楚。Eloquent\BuilderQuery\Builder首先,确认Eloquent\Builder与Query\Builder是否是有继承关系:1/ 打印两者之间的instanceof关系,发现并没有关系2/ 查看源码:Eloquent\Builder的构造器方法中有一个注入参数QueryBuilder1 2
* @param \Illuminate\Database\Query\Builder $query * @return void */ public function __construct(QueryBuilder $query) { $this->query = $query; } 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. 13. 14. 15. 16. 17. 可见两者之间并没有继承的关系,而是Eloquent\Builder采用了代理模式...
其实就是更为安全地操作数据库的方式,具体有三方面的好处: (1) Laravel查询构造器(query builder)提供方便、流畅的接口,用来建立及执行数据库查找语法 (2) 使用PDO参数绑定,以保护应用程序免于SQL注入。因此传入的参数不需额外转义特殊字符 (3) 基本可以满足所有的数据库操作,而且在所有支持的数据库系统上都可以执行...
Anweb applicationalways needs to interact with a database and Laravel makes this task hassle free. A few tools that makeLaravelan awesome framework is the inclusion of “Query Builder and Eloquent ORM”. Through this blog I intend to share few quick pointers on these concepts. Query Builder: ...
19 * @param \Illuminate\Database\Eloquent\Model $model 20 * @return void 21 */ 22public function remove(Builder $builder, Model $model) 23{ 24 $column = $model->getQualifiedDeletedAtColumn(); 25 26 $query = $builder->getQuery(); 27 28 foreach ((array) $query->wheres as $key...
使用enableQueryLog()函数打开SQL记录,然后是正常的数据库逻辑,最后,使用 getQueryLog() 方法获取一个包含了生成的SQL语句,还有绑定的参数。 上述语句打印的结果大致如下: 还有一种方法,就是链式调用 QueryBuilder 的 toSql 方法,即可打印当前模型的SQL语句,而并不执行。
Build Eloquent queries from API requests Basic usage useSpatie\QueryBuilder\QueryBuilder;$users= QueryBuilder::for(User::class) ->allowedFilters('name') ->get();// all `User`s that contain the string "John" in their name Read more about filtering features like: partial filters, exact filte...
The Eloquent all method will return all of the results in the model's table. Since each Eloquent model serves as a query builder, you may also add constraints to queries, and then use the get method to retrieve the results:1$flights = App\Flight::where('active', 1) 2 ->orderBy('...
Build Eloquent queries from API requests Basic usage Filter a query based on a request:/users?filter[name]=John: useSpatie\QueryBuilder\QueryBuilder;$users= QueryBuilder::for(User::class) ->allowedFilters('name') ->get();// all `User`s that contain the string "John" in their name ...
use Illuminate\Database\Eloquent\Builder; $posts = Post::whereDoesntHave('comments.author', function (Builder $query) { $query->where('banned', 0); })->get();多态关联查询要查询多态关联关系的存在,可以使用 whereHasMorph 和whereDoesntHaveMorph 方法。这些方法接受关联名称作为它们的第一个参数。接...