ModelAdmin Search Filter

gistfile1.txt

  private static $searchable_fields = [
        'Title' => [
            'title' => 'Title'
        ],
        'Year' => [
            'title' => 'Year',
            'field' => DropdownField::class
        ],
        'ProductType.Title' => [
            'title' => 'Product Type',
            'field' => DropdownField::class
        ],
    ];

    /**
     * @return SearchContext
     */
    public function getDefaultSearchContext()
    {
        $fields = $this->scaffoldSearchFields();

        $filters = [
            'Title'                         => new PartialMatchFilter('Title'),
            'Year'                          => new ExactMatchFilter('Year'),
            'ProductType.Title'             => new ExactMatchFilter('ProductType.Title'),
        ];

        $yearField = $fields->dataFieldByName('Year');
        if ($yearField) {
            $yearField->setSource($validYears)->setEmptyString('');
        }


        $productTypes = ProductType::get()->map('Title', 'Title');
        $productTypesField = $fields->dataFieldByName('ProductType__Title');
        if ($productTypesField) {
            $productTypesField->setSource($productTypes)->setEmptyString('');
        }

        return new SearchContext(
            WhateverDataObjectClass::class,
            $fields,
            $filters
        );
    }