我有一个帖子/类别Manytomany关系,并且希望能够将名为"未分类"的默认类别附加到创建的每个新帖子中。我怎样才能做到这一点?属于详细信息页面,而不在创建页面上。
BelongsToMany::make(__('Categories'), 'categories', Category::class),
您还可以将默认值设置为数据库字段,以便您可以省略传递类别,并将默认为 nockorized ,例如使用MySQL,您可以通过创建迁移
这样做$table->text('category')->default(0);
,因为属于nova model中的属于模式上的属于属于模式。因此,我们必须通过将此代码添加到您的字段中进行自定义选择:
public function fields(Request $request)
{
if($request->editMode=="create"){
$categories = AppCategory::get(['id','name']);
$options = [];
foreach($categories as $value){
$options[$value->id] = $value->name;
}
return [
ID::make()->sortable(),
Text::make('Title'),
Text::make('Summary'),
Textarea::make('Content'),
Select::make('Categories', 'category_id')
->options($options)
->displayUsingLabels()
->withMeta(['value' => 1]) // 1 = id of Uncategorised in categories table
];
}
return [
ID::make()->sortable(),
Text::make('Title'),
Text::make('Summary'),
Textarea::make('Content'),
BelongsToMany::make('Categories','categories')->display('name'),
];
}
不要忘记在帖子和类别模型中的关系功能:
class Post extends Model
{
public function categories(){
return $this->belongsToMany(Category::class, 'category_post', 'post_id', 'category_id');
}
}
和:
class Category extends Model
{
public function posts(){
return $this->belongsToMany(Post::class,'category_post', 'category_id', 'post_id');
}
}
然后,自定义函数处理邮政资源页面模式上的数据,它位于nova src http controllers resourcestorecontroller.php,更改函数句柄:
public function handle(CreateResourceRequest $request)
{
$resource = $request->resource();
$resource::authorizeToCreate($request);
$resource::validateForCreation($request);
$model = DB::transaction(function () use ($request, $resource) {
[$model, $callbacks] = $resource::fill(
$request, $resource::newModel()
);
if ($request->viaRelationship()) {
$request->findParentModelOrFail()
->{$request->viaRelationship}()
->save($model);
} else {
$model->save();
// your code to save to pivot category_post here
if(isset($request->category_id)&&($resource=='AppNovaPost')){
$category_id = $request->category_id;
$post_id = $model->id;
AppPost::find($post_id)->categories()->attach($category_id);
}
}
ActionEvent::forResourceCreate($request->user(), $model)->save();
collect($callbacks)->each->__invoke();
return $model;
});
return response()->json([
'id' => $model->getKey(),
'resource' => $model->attributesToArray(),
'redirect' => $resource::redirectAfterCreate($request, $request->newResourceWith($model)),
], 201);
}
}
在我的计算机上一切都很好。一个有趣的问题!希望您最好,问我是否需要!
我最终要做的是在boot((中保存邮政模型上的数据。
public static function boot()
{
parent::boot();
static::created(function (Post $post) {
$post->categories()->attach([1]);
});
}