Is Many To Many possible in a Filament form?

[ApolloDevs]

Looking to have a pre-filled checkbox values based on the pivot table from a many-to-many relationship.

I suppose a good example of this would be roles from Spatie's roles package, allowing you to edit the users' roles.

I couldn't find a good way of doing this, it doesn't seem there are any column types native to Filament that can handle something like this.

Could I have an example if possible? Loving the package and have starred it. :)

[eugenefvdm]

Googled many to many and Filament and got here. I'm sure it's possible! Going to look further.

[danharrin]

https://filamentphp.com/docs/2.x/admin/resources/getting-started#belongstomany

[eugenefvdm]

Thanks so much. The key in my case was to "just try it". It appears one can overthink things coming from Nova where you have to add a class. For my use case:

• Invoices belongsToMany Transactions
• Transactions belongsToMany Invoices

I wanted to see all the transactions on a User resource...

php artisan make:filament-relation-manager InvoiceResource transactions transaction_id

After running the above artisan command and then adding the RelationManager in getRelations of the user resource it just worked.

[mailtijmen]

I don't think this really answers the question right?

Following these steps will show the relations but not a form field to create or edit the relations.

[kakaye-mkubwa]

Can someone mutate the many-to-many table before update?

[mailtijmen]

If you haven't included --attach when creating the relationship manager manually include the various actions in the table section of the relationship manager as set out here:
https://filamentphp.com/docs/2.x/admin/resources/relation-managers#attaching-and-detaching-records

Just to be complete, if you do not see the relationship manager table underneath the specific model:
check: withPivot() in the eloquent model, and the getRelations in the modelResource

[abanghendri]

can you provide an example to do this?
I have withPivot() for my belongsToMany() in my model, but I have no idea where to put in modelResource

[mailtijmen]

 public static function getRelations(): array
    {
        return [
                
                RelationManagers\CategoriesRelationManager::class,
            
        ];
    }

Also Chat probably gives a better explanation than I can