Better solution to get column from Relationship with Main Model columns - php

Question

Need a better solution
There is a Post which belongs to multiple Categories and both having Many-to-Many relationship in between them. The intermediate table for many-to-many relationship is PostCategory. PostCategory contains post_id, category_id and sequence of the post. I want to get this sequence with the Post model attributes (title, description, ...).
To get this, am doing like this
$posts = Post::where([
'is_active' => 1,
'is_deleted' => 0,
'is_published' => 1,
'status' => 'publish'
])->whereHas('category', function ($query) use ($params) {
return $query->where([
'category_id' => $params['categoryId'],
]);
})->with([
'category' => function ($query) use ($params) {
return $query->where([
'category_id' => $params['categoryId'],
]);
}
])
->orderBy('live_date', 'DESC')
->orderBy('publish_time', 'DESC')
->get()
->toArray();
foreach ($posts as &$post) {
$post['sequence'] = $post['category']['sequence'];
}
Am getting the expected result but as you can see, first I've to use the closure twice and then have to iterate through entire collection to set sequence at the top-level but as I mentioned, I need a better solution to this (If any)
Post.php
namespace App\Models\Mongo;
/**
* #mixin \Illuminate\Database\Eloquent\Builder
* #mixin \Jenssegers\Mongodb\Query\Builder
*/
class POST extends \Jenssegers\Mongodb\Eloquent\Model
{
/** #var string Mongo Connection Name */
//protected $connection = 'mongodb';
/** #var string Mongo Collection Name */
protected $collection = 'posts';
/** #var bool Enable/Disable Timestamp */
public $timestamps = true;
/** #var string Date format */
protected $dateFormat = 'Y-m-d H:i:s';
/** #var array */
protected $dates = ['created_at', 'updated_at', 'live_date', 'expire_date'];
/**
* // I know this relation is not correct, it must either belongsToMany or hasMany
* // but as of now, I've to fetch the posts belonging to a single category id
* // so using hasOne relation
* #return \Jenssegers\Mongodb\Relations\HasOne
*/
public function category()
{
return $this->hasOne(
PostCategory::class,
'post_id',
'_id'
);
}
}
PostCategory.php
namespace App\Models\Mongo;
/**
* #mixin \Illuminate\Database\Eloquent\Builder
* #mixin \Jenssegers\Mongodb\Query\Builder
*/
class PostCategory extends \Jenssegers\Mongodb\Eloquent\Model
{
/** #var string Mongo Connection Name */
//protected $connection = 'mongodb';
/** #var string Mongo Collection Name */
protected $collection = 'post_category';
/**
* #return \Jenssegers\Mongodb\Relations\HasMany
*/
public function post()
{
return $this->hasMany(Post::class, '_id', 'post_id');
}
}
Changes
change relation to belongsToMany in Post
Relation is not working
return $this->belongsToMany(
Category::class,
'post_category',
'post_id',
'category_id',
'_id', <-- post primary key
'_id', <-- category primary key
)->withPivot('sequence');

Answer 1

You could use a many-to-many relationship instead and access sequence as pivot column.
namespace App\Models\Mongo;
/**
* #mixin \Illuminate\Database\Eloquent\Builder
* #mixin \Jenssegers\Mongodb\Query\Builder
*/
class POST extends \Jenssegers\Mongodb\Eloquent\Model
{
/** #var string Mongo Connection Name */
//protected $connection = 'mongodb';
/** #var string Mongo Collection Name */
protected $collection = 'posts';
/** #var bool Enable/Disable Timestamp */
public $timestamps = true;
/** #var string Date format */
protected $dateFormat = 'Y-m-d H:i:s';
/** #var array */
protected $dates = ['created_at', 'updated_at', 'live_date', 'expire_date'];
/**
* // I know this relation is not correct, it must either belongsToMany or hasMany
* // but as of now, I've to fetch the posts belonging to a single category id
* // so using hasOne relation
* #return \Jenssegers\Mongodb\Relations\HasOne
*/
public function category()
{
return $this->belongsToMany(
Category::class
)->withPivot('sequence');
}
}
You probably have to add one or more optional parameters to belongsToMany() to make it work. But since you know your data structure better than I do, I bet, you can figure that out faster than I can.