Laravel:如何在标签模型中创建唯一标签 [英] Laravel : how to create unique tag in tags model

问题描述

我要为帖子创建标签.我不想保存标签重复，但是重复保存

I want create tag for posts . I don't want tags repetitions to be saved,But it is stored repeated

public function store(Request $request)
{
    $data = $request->all();
    $post = Post::create($data);
    if ($post && $post instanceof Post) {
        $tags = $request->input('tags');
        foreach ($tags as $tag){
                $newTag = Tag::create(['name'=>$tag]);
                $tags[] = $newTag->id;
        }
            $post->tags()->sync($tags);
        return redirect()->back();
    }
}

怎么办?

推荐答案

updateOrCreate 方法将帮助检查如果不存在，它将创建数据，并在数据库中已经存在的情况下进行更新

updateOrCreate method will help check It will create data if it not exists and update in case it already in db

Tag::updateOrCreate(['name'=>$tag]);

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