Filament•2mo ago

Having trouble setting up a belongs to many select

i have 3 tables, quality_control_steps, machine_centers,and a join table machine_center_quality_control_step and i can see a row in my table, but i cant seem to get the select working, it should allow me to select from all rows from the quality_control_steps table:

 protected static string $relationship = 'qualityControlSteps';

    public function form(Form $form): Form
    {
        return $form
            ->schema([
                Select::make('quality_control_step_id')
                    ->multiple()
                    ->preload()
                    ->relationship('machineCenters', titleAttribute: 'name')
                    ->required()
            ]);
    }

 protected static string $relationship = 'qualityControlSteps';

    public function form(Form $form): Form
    {
        return $form
            ->schema([
                Select::make('quality_control_step_id')
                    ->multiple()
                    ->preload()
                    ->relationship('machineCenters', titleAttribute: 'name')
                    ->required()
            ]);
    }

but it shows me a list of the machine centers instead!

Solution:

but it shows me a list of the machine centers instead!

because you asked for that ->relationship('machineCenters', ... filament does not know your set up, neither do I.. I'm going to make the assumption that qualityControlStepsare related to machineCenters. in which case you would need to use ->relationship('machineCenters.qualityControlSteps', 'titleColumn')...

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5 Replies

delboy1978ukOP•2mo ago

if i change the call to relationship() to use qualityControlSteps then the select throws an exception:

Filament\Support\Services\RelationshipJoiner::prepareQueryForNoConstraints(): Argument #1 ($relationship) must be of type Illuminate\Database\Eloquent\Relations\Relation, null given

Filament\Support\Services\RelationshipJoiner::prepareQueryForNoConstraints(): Argument #1 ($relationship) must be of type Illuminate\Database\Eloquent\Relations\Relation, null given

because it is checking for that method on the quality control object

Solution

Jordy•2mo ago

but it shows me a list of the machine centers instead!

delboy1978ukOP•2mo ago

@Jordy thank you so much! That's exactly all that I needed, machineCenters.qualityControlSteps. Have a great day!

delboy1978ukOP•2mo ago

Oh, only it tries to insert into the quality control steps table, and not the join table?

delboy1978ukOP•2mo ago

but the dropdown looks correct 🙂

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Having trouble setting up a belongs to many select

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