Filament•10mo ago

Relationship belongstoMany

Good evening, I tried to make my own portfolio using filament since I'm not good at frontend. My goal is a project can have many tags and a tags can have many project too. For example Project A Tag1, Tag2, Tag3 Project B Tag2, Tag3 Project C Tag3 I followed the filament code source on GitHub for the database migration. On the filament demo, a product can have multiple categories. So I check the database migration for tables product, there is no category_id in it but I can create a product with multiple categories. In my case I need to add foreignUuid for tag_id inside my projects table. Anyone can explain to me ?

Solution:

Check this, it's working for many-to-many

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22 Replies

daisy21•10mo ago

there is no category_id inside product tables, because if u are using manytomany it will create a new table pivot table i suggest you read this https://laravel.com/docs/10.x/eloquent-relationships#many-to-many

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daisy21•10mo ago

the table in the demo should be shop_category_product

einnlleinhatt_•10mo ago

Yeah, I did follow the source code but when I tried to create a new project and submit. It will give me an error like tag_id is column is not exist or something like that. I have 3 tables projects tags project_tag I'm not sure if because I'm using uuid('id)->primary()

daisy21•10mo ago

can you show your filament form code?

cheesegrits•10mo ago

Show the code you have for the tags() relationship on your Project model, and your Project form scheme. Is this in an admin panel, or standalone form?

einnlleinhatt_•10mo ago

projects table
uuid('id')->primary()
string('name')
string('image')
string('url')
long text('description')
timestamp()

tags table
uuid('id')->primary()
string('name')
timestamp()

project_tag table
primary(['projects_id', 'tags_id'])
foreignUuid('projects_id')
foreignUuid('tags_id')
timestamp()

projects table
uuid('id')->primary()
string('name')
string('image')
string('url')
long text('description')
timestamp()

tags table
uuid('id')->primary()
string('name')
timestamp()

project_tag table
primary(['projects_id', 'tags_id'])
foreignUuid('projects_id')
foreignUuid('tags_id')
timestamp()

ProjectModel

public function tags(): BelongsToMany
    {
        return $this->belongsToMany(Tag::class, 'project_tag', 'projects_id', 'tags_id')->withTimestamps();
    }

TagModal
public function projects(): BelongsToMany
    {
        return $this->belongsToMany(Project::class, 'project_tag', 'projects_id', 'tags_id')->withTimestamps();
    }

ProjectModel

public function tags(): BelongsToMany
    {
        return $this->belongsToMany(Tag::class, 'project_tag', 'projects_id', 'tags_id')->withTimestamps();
    }

TagModal
public function projects(): BelongsToMany
    {
        return $this->belongsToMany(Project::class, 'project_tag', 'projects_id', 'tags_id')->withTimestamps();
    }

It's an admin panel. It will not work untill I add a new table foreignUuid('tag_id).

cheesegrits•10mo ago

Need to see the form schema, specifically the Select or Tags field.

einnlleinhatt_•10mo ago

Forms\Components\Select::make('tags')
                                    ->relationship('tags', 'name')
                                    ->multiple()
                                    ->required(),

Forms\Components\Select::make('tags')
                                    ->relationship('tags', 'name')
                                    ->multiple()
                                    ->required(),

Vp•10mo ago

Base on your tables and your code it should work.. but I've never seen primary(['projects_id', 'tags_id']) like this..

einnlleinhatt_•10mo ago

It won't work untill I add tag_id column inside projects table. I'm following filament source code in GitHub. https://github.com/filamentphp/demo/tree/main/database/migrations The shop products, categories and category product migration.

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einnlleinhatt_•10mo ago

I add this to my projects table and it's work $table->foreignUuid('tags_id')->nullable()->constrained()->nullOnDelete();

Vp•10mo ago

If you add tag_id inside project table, then it cannot be many-to-many, I'll share my gits related many-to-many for refs https://gist.github.com/valpuia/087dad4afc37818a3d532d63767ca430

einnlleinhatt_•10mo ago

As to my goal I'm correct to use many to many relationship right ?

Solution

Vp•10mo ago

Check this, it's working for many-to-many

Vp•10mo ago

Yes

einnlleinhatt_•10mo ago

It's not the uuid problem right? Also thanks for the gits. I will try using id with a new project when I'm home.

Vp•10mo ago

Uuid should not be the problem..

daisy21•10mo ago

wait is this really the error? It will give me an error like tag_id is column is not exist u said error was tag_id but your table use tags_id you should screenshot the error too

einnlleinhatt_•10mo ago

Yes we have the same error I think, just different name. My original tables doesn't have tags_id column, but when I add it. It's work.

einnlleinhatt_•10mo ago

Thank you, fixed now

daisy21•10mo ago

can you share the fix?

einnlleinhatt_•10mo ago

I'm following this code https://discord.com/channels/883083792112300104/1156455683986825246/1156487354022887544

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Relationship belongstoMany