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pascalbaljetpascalbaljet
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Target binding: support BelongsToMany relationships (#34)
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‎CHANGELOG.md‎

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All notable changes to `laravel-form-components` will be documented in this file
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## 2.5.0 - 2020-12-22
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- Support for `BelongsToMany`, `MorphMany`, and `MorphToMany` relationships (select element)
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## 2.4.0 - 2020-12-11
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- Support for Livewire modifiers
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## 2.3.0 - 2020-12-01
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- Support for PHP 8.0

‎README.md‎

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@@ -280,6 +280,20 @@ If you want a select element where multiple options can be selected, add the `mu
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<x-form-select name="country_code" :options="$countries" multiple :default="['be', 'nl']" />
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```
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#### Using Eloquent relationships
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This package has built-in support for `BelongsToMany`, `MorphMany`, and `MorphToMany` relationships. To utilize this feature, you must add both the `multiple` and `many-relation` attribute to the select element.
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In the example below, you can attach one or more tags to the bound video. By using the `many-relation` attribute, it will correctly retrieve the selected options (attached tags) from the database.
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```blade
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<x-form>
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@bind($video)
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<x-form-select name="tags" :options="$tags" multiple many-relation />
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@endbind
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</x-form>
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```
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### Checkbox elements
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Checkboxes have a default value of `1`, but you can customize it as well.

‎src/Components/FormSelect.php‎

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namespace ProtoneMedia\LaravelFormComponents\Components;
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use Illuminate\Contracts\Support\Arrayable;
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use Illuminate\Support\Arr;
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use Illuminate\Support\Str;
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$bind = null,
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$default = null,
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bool $multiple = false,
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bool $showErrors = true
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bool $showErrors = true,
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bool $manyRelation = false
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) {
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$this->name = $name;
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$this->label = $label;
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$this->options = $options;
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$this->name = $name;
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$this->label = $label;
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$this->options = $options;
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$this->manyRelation = $manyRelation;
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if ($this->isNotWired()) {
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$inputName = Str::before($name, '[]');
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$default = $this->getBoundValue($bind, $inputName) ?: $default;
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$this->selectedKey = old($inputName, $default);
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if ($this->selectedKey instanceof Arrayable) {
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$this->selectedKey = $this->selectedKey->toArray();
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}
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}
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$this->multiple = $multiple;

‎src/Components/HandlesBoundValues.php‎

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namespace ProtoneMedia\LaravelFormComponents\Components;
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use Illuminate\Database\Eloquent\Model;
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use Illuminate\Database\Eloquent\Relations\BelongsToMany;
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use Illuminate\Database\Eloquent\Relations\MorphMany;
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use ProtoneMedia\LaravelFormComponents\FormDataBinder;
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trait HandlesBoundValues
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{
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/**
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* Wether to retrieve the default value as a single
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* attribute or as a collection from the database.
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*
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* @var boolean
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*/
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protected $manyRelation = false;
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/**
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* Get an instance of FormDataBinder.
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*
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$bind = $bind ?: $this->getBoundTarget();
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return $this->manyRelation
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? $this->getAttachedKeysFromRelation($bind, $name)
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: data_get($bind, $name);
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}
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/**
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* Returns an array with the attached keys.
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*
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* @param mixed $bind
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* @param string $name
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* @return void
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*/
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private function getAttachedKeysFromRelation($bind, string $name): ?array
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{
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if (!$bind instanceof Model) {
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return data_get($bind, $name);
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}
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$relation = $bind->{$name}();
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if ($relation instanceof BelongsToMany) {
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$relatedKeyName = $relation->getRelatedKeyName();
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return $relation->getBaseQuery()
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->get($relation->getRelated()->qualifyColumn($relatedKeyName))
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->pluck($relatedKeyName)
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->all();
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}
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if ($relation instanceof MorphMany) {
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$parentKeyName = $relation->getLocalKeyName();
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return $relation->getBaseQuery()
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->get($relation->getQuery()->qualifyColumn($parentKeyName))
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->pluck($parentKeyName)
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->all();
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}
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return data_get($bind, $name);
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}
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}

‎tests/Feature/InteractsWithDatabase.php‎

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<?php
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namespace ProtoneMedia\LaravelFormComponents\Tests\Feature;
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use Illuminate\Database\Eloquent\Model;
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trait InteractsWithDatabase
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{
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protected function setupDatabase()
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{
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Model::unguard();
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$this->app['config']->set('database.default', 'sqlite');
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$this->app['config']->set('database.connections.sqlite', [
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'driver' => 'sqlite',
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'database' => ':memory:',
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'prefix' => '',
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]);
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include_once __DIR__ . '/database/create_posts_table.php';
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include_once __DIR__ . '/database/create_comments_table.php';
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include_once __DIR__ . '/database/create_comment_post_table.php';
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include_once __DIR__ . '/database/create_commentables_table.php';
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(new \CreatePostsTable)->up();
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(new \CreateCommentsTable)->up();
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(new \CreateCommentPostTable)->up();
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(new \CreateCommentablesTable)->up();
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}
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}

‎tests/Feature/SelectRelationTest.php‎

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<?php
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namespace ProtoneMedia\LaravelFormComponents\Tests\Feature;
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use Illuminate\Database\Eloquent\Model;
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use Illuminate\Support\Facades\DB;
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use Illuminate\Support\Facades\Route;
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use ProtoneMedia\LaravelFormComponents\Tests\TestCase;
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class PostBelongsToMany extends Model
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{
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protected $table = 'posts';
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public function comments()
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{
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return $this->belongsToMany(Comment::class, 'comment_post', 'post_id', 'comment_id');
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}
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}
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class PostMorphMany extends Model
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{
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protected $table = 'posts';
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public function comments()
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{
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return $this->morphMany(Comment::class, 'commentable');
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}
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}
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class PostMorphToMany extends Model
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{
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protected $table = 'posts';
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public function comments()
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{
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return $this->morphToMany(Comment::class, 'commentable');
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}
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}
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class Comment extends Model
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{
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}
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class SelectRelationTest extends TestCase
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{
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use InteractsWithDatabase;
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/** @test */
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public function it_handles_belongs_to_many_relationships()
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{
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$this->setupDatabase();
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$post = PostBelongsToMany::create(['content' => 'Content']);
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$commentA = Comment::create(['content' => 'Content A']);
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$commentB = Comment::create(['content' => 'Content B']);
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$commentC = Comment::create(['content' => 'Content C']);
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$post->comments()->sync([$commentA->getKey(), $commentC->getKey()]);
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$options = Comment::get()->pluck('content', 'id');
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Route::get('select-relation', function () use ($post, $options) {
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return view('select-relation')
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->with('post', $post)
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->with('options', $options);
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})->middleware('web');
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DB::enableQueryLog();
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$this->visit('/select-relation')
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->seeElement('option[value="' . $commentA->getKey() . '"]:selected')
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->seeElement('option[value="' . $commentB->getKey() . '"]:not(:selected)')
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->seeElement('option[value="' . $commentC->getKey() . '"]:selected');
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// make sure we cache the result for each option element
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$this->assertCount(1, DB::getQueryLog());
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}
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/** @test */
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public function it_handles_morph_many_relationships()
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{
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$this->setupDatabase();
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$post = PostMorphMany::create(['content' => 'Content']);
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$commentA = $post->comments()->create(['content' => 'Content A']);
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$commentB = Comment::create(['content' => 'Content B']);
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$commentC = $post->comments()->create(['content' => 'Content C']);
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$options = Comment::get()->pluck('content', 'id');
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Route::get('select-relation', function () use ($post, $options) {
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return view('select-relation')
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->with('post', $post)
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->with('options', $options);
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})->middleware('web');
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DB::enableQueryLog();
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$this->visit('/select-relation')
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->seeElement('option[value="' . $commentA->getKey() . '"]:selected')
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->seeElement('option[value="' . $commentB->getKey() . '"]:not(:selected)')
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->seeElement('option[value="' . $commentC->getKey() . '"]:selected');
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// make sure we cache the result for each option element
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$this->assertCount(1, DB::getQueryLog());
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}
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/** @test */
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public function it_handles_morph_to_many_relationships()
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{
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$this->setupDatabase();
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$post = PostMorphToMany::create(['content' => 'Content']);
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$commentA = $post->comments()->create(['content' => 'Content A']);
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$commentB = Comment::create(['content' => 'Content B']);
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$commentC = $post->comments()->create(['content' => 'Content C']);
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$options = Comment::get()->pluck('content', 'id');
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Route::get('select-relation', function () use ($post, $options) {
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return view('select-relation')
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->with('post', $post)
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->with('options', $options);
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})->middleware('web');
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DB::enableQueryLog();
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$this->visit('/select-relation')
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->seeElement('option[value="' . $commentA->getKey() . '"]:selected')
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->seeElement('option[value="' . $commentB->getKey() . '"]:not(:selected)')
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->seeElement('option[value="' . $commentC->getKey() . '"]:selected');
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// make sure we cache the result for each option element
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$this->assertCount(1, DB::getQueryLog());
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}
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}

‎tests/Feature/database/create_comment_post_table.php‎

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<?php
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use Illuminate\Database\Migrations\Migration;
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use Illuminate\Database\Schema\Blueprint;
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use Illuminate\Support\Facades\Schema;
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class CreateCommentPostTable extends Migration
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{
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/**
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* Run the migrations.
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*
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* @return void
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*/
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public function up()
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{
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Schema::create('comment_post', function (Blueprint $table) {
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$table->unsignedBigInteger('post_id');
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$table->unsignedBigInteger('comment_id');
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});
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}
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/**
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* Reverse the migrations.
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*
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* @return void
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*/
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public function down()
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{
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Schema::dropIfExists('comment_post');
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}
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}

‎tests/Feature/database/create_commentables_table.php‎

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<?php
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use Illuminate\Database\Migrations\Migration;
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use Illuminate\Database\Schema\Blueprint;
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use Illuminate\Support\Facades\Schema;
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class CreateCommentablesTable extends Migration
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{
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/**
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* Run the migrations.
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*
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* @return void
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*/
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public function up()
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{
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Schema::create('commentables', function (Blueprint $table) {
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$table->bigIncrements('id');
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$table->unsignedBigInteger('comment_id');
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$table->morphs('commentable');
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});
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}
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/**
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* Reverse the migrations.
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*
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* @return void
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*/
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public function down()
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{
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Schema::dropIfExists('comments');
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}
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}

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