How to get nested relation value with Eager Loading using hasManyThrough? - php

Question

I want to retrieve tags related to each model without loading all columns of intermediate tables. I want to display tags on index page. Please tell me if any solution exist for this scenario.
I tried with hasManyThrough relationship to get tags but its not working because of polymorphic index table.
(Table Name => Table Columns)
food_index => id, description, food_type, food_id
fruits => id, description, price, availability
vegetables => id, description, price, availability, calories
cereal => id, description, price, availability, brand
tags => id, tag
(pivot table)
taggable => id, tag_id, taggable_type, taggable_id
Models =>
class Fruit extends Model
{
public function index()
{
return $this->morphOne('App\FoodIndex', 'indexable', 'food_type', 'food_id');
}
public function tags() {
return $this->morphToMany('App\Tag', 'taggable');
}
}
class Vegetable extends Model
{
public function index()
{
return $this->morphOne('App\FoodIndex', 'indexable', 'food_type', 'food_id');
}
public function tags() {
return $this->morphToMany('App\Tag', 'taggable');
}
}
class Cereal extends Model
{
public function index()
{
return $this->morphOne('App\FoodIndex', 'indexable', 'food_type', 'food_id');
}
public function tags() {
return $this->morphToMany('App\Tag', 'taggable');
}
}
class Tag extends Model
{
public function fruits() {
return $this->morphedByMany('App\Fruit', 'taggable');
}
public function vegetables() {
return $this->morphedByMany('App\Vegetable', 'taggable');
}
public function cereals() {
return $this->morphedByMany('App\Cereal', 'taggable');
}
}
class FoodIndex extends Model
{
public function owner()
{
return $this->morphTo("owner", "food_type", "food_id");
}
public function tags()
{
// return $this->hasManyThrough("App\Tag", "App\FoodIndex", "food_id", 'food_type', "taggable_id", "taggable_type");
// return $this->hasManyThrough('App\Tag', $this->food_type, 'id', 'id');
}
}
Code in controller =>
$index = FoodIndex::whereRaw("MATCH description AGAINST (? IN BOOLEAN MODE)", [$this->fullTextWildcards($term)])->with([
'tags'
])->simplePaginate(5);
I expect $index->tag property to return the tag associated with each food item
but I am getting errors