How to create a lot of categories for card laravel voyager

Let’s say in your case, we need to define the category for every features. So feature can have many categories and inverse category can have many features. Thus, it will be a Many To Many relationships.

To accomplish this we need to create 3 tables features, categories, and intermediate table feature_category. The feature_category table will have the feature_id and category_id column which connects both feature and category table and this intermediate table called the pivot table.

Here are the table structures:

features
    id - integer
    name - string
 
categories
    id - integer
    name - string
 
feature_category
    feature_id - integer
    category_id - integer

=> category

id  name                 
--  -------    
1   Category 1
2   Category 2
3   Category 3
4   Category 4 

=> features

id  name                 
--  -------    
1   Feature 1
2   Feature 2
3   Feature 3
4   Feature 4 

=> feature_category

id  feature_id   category_id            
--  -------        -------
1      1              1
2      2              2
3      3              2
4      3              3
4      3              4

===============================

Our feature_category table before sync() operation:

id  feature_id   category_id            
--  -------        -------
1      1              1
2      2              2
3      2              3
4      2              4
5      3              2
6      4              3

Laravel Sync() example:

<?php
 
    use AppModelsFeature;
 
    $user = Feature::find(2);
 
    // Want to keep only "Category 2" (Id 2) category
    $user->category()->sync([2]); 

After performing the above operation, our feature_category table will look like below:

id  feature_id   category_id            
--  -------        -------
1      1              1
2      2              2
5      3              2
6      4              3

Checkboxes or dropdowns can be used from the frontend to select multiple categories for features and sync() method can be used to update feature cards accordingly.