Filament•8mo ago

How to avoid duplicate queries

I am using table with TextColumn, i am fetching custom data from another table based on the id of the $record. For some reason it gives me duplicate entries despite using callback. Any help please?

TextColumn::make('specialitie_id')
                    ->formatStateUsing(
                        fn($record) => Speciality::find($record->speciality->first()->parent_id, ['name'])
                        )
                ->label('Speciality'),

TextColumn::make('specialitie_id')
                    ->formatStateUsing(
                        fn($record) => Speciality::find($record->speciality->first()->parent_id, ['name'])
                        )
                ->label('Speciality'),

4 Replies

Majid Al Zariey•8mo ago

This is normal as you are using a query in the formatStateUsing I recommend using join relationship with left join option by modifying the Resource query

kingtoxOP•8mo ago

it doesn't happened in V2, strange. i have a large data including relationship so are you sure it's normal and won't affect the performance etc?

Povilas K•8mo ago

@kingtox weird to hear that it doesn't happen in v2, as there's clearly a separate DB query for every record. And yes, my recommendation is the same, to change the initial query to use join, probably @kingtox I've tried to reproduce it to create a demo video, so here's how you can load that parent relationship directly from TextColumn:

class Job extends Model
{
    public function speciality(): BelongsTo
    {
        return $this->belongsTo(Speciality::class);
    }
}

class Speciality extends Model
{
    public function parent(): BelongsTo
    {
        return $this->belongsTo(Speciality::class, 'parent_id');
    }
}

// JobResource in Filament:
    public static function table(Table $table): Table
    {
        return $table
            ->columns([
                Tables\Columns\TextColumn::make('name'),
                Tables\Columns\TextColumn::make('speciality.parent.name'),
            ])

class Job extends Model
{
    public function speciality(): BelongsTo
    {
        return $this->belongsTo(Speciality::class);
    }
}

class Speciality extends Model
{
    public function parent(): BelongsTo
    {
        return $this->belongsTo(Speciality::class, 'parent_id');
    }
}

// JobResource in Filament:
    public static function table(Table $table): Table
    {
        return $table
            ->columns([
                Tables\Columns\TextColumn::make('name'),
                Tables\Columns\TextColumn::make('speciality.parent.name'),
            ])

Povilas K•8mo ago

will load only two queries for the relationship, no matter the amount of rows

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How to avoid duplicate queries