Laravel 多个 Table 子查询

Question

我正在使用 Laravel 6.0 我有 4 个不同的 tables.

表格：

post_category

id	relation_post_id	post_type	category_id

photo_post

id	title	image	created_at

text_post

id	title	content	created_at

video_post

id	title	video_source_url	created_at

我想列出 post_category table 两个日期范围内的帖子。例如

PostCategory::whereBetween('created_at',[$from, $to])->get();

结果应该是：

结果

https://i.ibb.co/y53PmJ9/image.png

我该怎么做？

型号： Post类别

class PostCategory extends Model
{
use SoftDeletes;
protected $table = 'post_category';
public $timestamps = true;

protected $fillable = [
    'relation_post_id',
    'post_type', // 1: text, 2: photo, 3: video
    'category_id',


];

public function text()
{
    return $this->belongsTo('App\TextPost','relation_post_id','id');
}
public function photo()
{
    return $this->belongsTo('App\PhotoPost','relation_post_id','id');
}
public function video()
{
    return $this->belongsTo('App\VideoPost','relation_post_id','id');
}}

文字Post

class TextPost extends Model
{
use SoftDeletes;
protected $table = 'text_post';
public $timestamps = true;

protected $fillable = [
    'title',
    'content',
];
}

照片Post

class PhotoPost extends Model
{
use SoftDeletes;
protected $table = 'photo_post';
public $timestamps = true;

protected $fillable = [
    'title',
    'image',

];
}

视频Post

class VideoPost extends Model
{
use SoftDeletes;
protected $table = 'video_post';
public $timestamps = true;

protected $fillable = [
    'title',
    'video_source_url',

];
}

Answer 1

当然，这是可能的。但是因为我们只知道你的数据库设计而不是你的代码库，所以很难说。直觉上我会选择 polymorphic relationship.

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