Filament•2y ago

Relation Manager

In relation manager for a resource, if the relation is hasOne, how do I stop creation of a another record if one already exists? Thanks in advance for any help.

10 Replies

Dennis Koch•2y ago

You shouldn't use a Relation Manager for HasOne. Use a Layout field like Fieldset

AnishOP•2y ago

But then I have a different issue. Some instances do not have the relation, i.e., it returns null. In such cases, updating fails saying that some fields are required.

Dennis Koch•2y ago

Show your code

AnishOP•2y ago

IssueResource

 

public static function form(Form $form): Form
    {
        


        return $form
            ->schema([

                Forms\Components\Fieldset::make('Information')
                    ->schema([
                        Forms\Components\TextInput::make('volume')
                            ->required(),

                        Forms\Components\Select::make('series')
                            ->options(SankhyaSeries::getAsSelectOptions()),

                        Forms\Components\Select::make('parts')
                            ->options($partOptions)
                            ->multiple()
                            ,

                        Forms\Components\Select::make('year')
                            ->options(array_combine($yearOptions, $yearOptions))
                            ->default(now()->year)
                            ->searchable()
                            ->required(),

                        Forms\Components\Select::make('month')
                            ->options(Month::getAsSelectOptions())
                            ->required(),
                    ])
                    ->columns(2),
                

                Forms\Components\Fieldset::make('Special Issue')
                    ->relationship('special_issue')

                    ->schema([
                        Forms\Components\TextInput::make('name')

                            ->label('Special Issue Name')
                            ->maxLength(1000)
                            ->helperText('Input the name of special issue, if this is one such')
                            ->columnSpan(2),
                    ]),

            ]);
    }

 

public static function form(Form $form): Form
    {
        


        return $form
            ->schema([

                Forms\Components\Fieldset::make('Information')
                    ->schema([
                        Forms\Components\TextInput::make('volume')
                            ->required(),

                        Forms\Components\Select::make('series')
                            ->options(SankhyaSeries::getAsSelectOptions()),

                        Forms\Components\Select::make('parts')
                            ->options($partOptions)
                            ->multiple()
                            ,

                        Forms\Components\Select::make('year')
                            ->options(array_combine($yearOptions, $yearOptions))
                            ->default(now()->year)
                            ->searchable()
                            ->required(),

                        Forms\Components\Select::make('month')
                            ->options(Month::getAsSelectOptions())
                            ->required(),
                    ])
                    ->columns(2),
                

                Forms\Components\Fieldset::make('Special Issue')
                    ->relationship('special_issue')

                    ->schema([
                        Forms\Components\TextInput::make('name')

                            ->label('Special Issue Name')
                            ->maxLength(1000)
                            ->helperText('Input the name of special issue, if this is one such')
                            ->columnSpan(2),
                    ]),

            ]);
    }

Dennis Koch•2y ago

AnishOP•2y ago

Sorry, pressed enter instead of shift enter. The special_issue is the HasOne Relation. Not all issues are special, only some of them.

Dennis Koch•2y ago

You could add a Toggle to enable the special_issue. Or use ->saveRelationshipsUsing() to only save when name is not empty

AnishOP•2y ago

Yes, I have thought about using a toggle to hide / show it. But did want to do it, if there is another cleaner solution. How does one use saveRelationshipsUsing? Should it used on the form component? I am unable to find documentation on that.

Dennis Koch•2y ago

Yes, you use it on the fieldset and it overwrites the saving logic. Check the EntanglesStateWithSingularRelationship::relationship() method for the default implementation. It's a bit complex though. Not sure whether we have a cleaner way. I guess a toggle would be cleaner.

AnishOP•2y ago

Ok. Thanks for the help.

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Relation Manager