我发现这些方法背后的概念和含义有点令人困惑,是否有人可以向我解释在一个例子(如果可能)的背景下,has和之间的区别with是什么?
如何使用Laravel Query Builder或Eloquent ORM在Laravel 3/4中检索原始执行的SQL查询?
例如,像这样:
DB::table('users')->where_status(1)->get();
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要么:
(posts (id, user_id, ...))
User::find(1)->posts->get();
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否则,至少我如何保存执行到laravel.log的所有查询?
我正在尝试在Laravel中创建外键但是当我使用artisani 迁移我的表时抛出以下错误:
[Illuminate\Database\QueryException]
SQLSTATE[HY000]: General error: 1215 Cannot add foreign key constraint (SQL
: alter table `priorities` add constraint priorities_user_id_foreign foreign
key (`user_id`) references `users` (`id`))
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我的迁移代码如下:
优先级迁移文件
public function up()
{
//
Schema::create('priorities', function($table) {
$table->increments('id', true);
$table->integer('user_id');
$table->foreign('user_id')->references('id')->on('users');
$table->string('priority_name');
$table->smallInteger('rank');
$table->text('class');
$table->timestamps('timecreated');
});
}
/**
* Reverse the migrations.
*
* @return void
*/
public function down()
{
//
Schema::drop('priorities');
}
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用户迁移文件
public function up()
{
//
Schema::table('users', function($table)
{
$table->create();
$table->increments('id');
$table->string('email');
$table->string('first_name');
$table->string('password');
$table->string('email_code'); …Run Code Online (Sandbox Code Playgroud) 简单的问题 - 如何通过Laravel 4中的'id'降序排序.
我的控制器的相关部分如下所示:
$posts = $this->post->all()
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据我了解你使用这一行:
->orderBy('id', 'DESC');
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但是这与我上面的代码有什么关系呢?
我用unsigned创建了一个迁移user_id.如何user_id在新迁移中编辑以进行编辑nullable()?
Schema::create('throttle', function(Blueprint $table)
{
$table->increments('id');
// this needs to also be nullable, how should the next migration be?
$table->integer('user_id')->unsigned();
}
Run Code Online (Sandbox Code Playgroud) I have two tables, User and Post. One User can have many posts and one post belongs to only one user.
In my User model I have a hasMany relation...
public function post(){
return $this->hasmany('post');
}
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And in my post model I have a belongsTo relation...
public function user(){
return $this->belongsTo('user');
}
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Now I want to join these two tables using Eloquent with() but want specific columns from the second table. I know I can use the Query …
我正在将我们的一个Web应用程序从CodeIgniter转换为Laravel.但是此时我们不想将updated_at/ created_atfields 添加到所有表中,因为我们已经有了一个日志类,它已经为我们更深入地完成了所有这些.
我知道我可以$timestamps = false;进入:
Vendor\laravel\framework\src\illuminate\Datebase\Eloquent\Model.php
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但是我宁愿不为Laravel更改核心文件,也不要让我的每个模型都在顶部.有没有办法在其他所有型号禁用它?
如果新记录不存在,插入新记录或更新的简写是什么?
<?php
$shopOwner = ShopMeta::where('shopId', '=', $theID)
->where('metadataKey', '=', 2001)->first();
if ($shopOwner == null) {
// Insert new record into database
} else {
// Update the existing record
}
Run Code Online (Sandbox Code Playgroud) 我们如何使用Eloquent ORM在Laravel中执行批量数据库插入?
我想在Laravel中完成此任务:https://stackoverflow.com/a/10615821/600516 但我收到以下错误.
SQLSTATE [HY093]:参数号无效:混合命名和位置参数.
有没有办法用Laravel的ELOQUENT ORM"限制"结果?
SELECT * FROM `games` LIMIT 30 , 30
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和Eloquent?