SQL错误：通过表单发送空字符串

I am using Bootforms to edit posts on a blog

<?php $formOptions = [
        'url' => 'user',
        'sm' => [2, 5],
        'lg' => [2, 5],
        'method'=> 'put'
    ]; ?>

    {!! BootForm::openHorizontal($formOptions)->action(route('news.update', $post)) !!}
    <input type="hidden" name="_method" value="PUT">
    {!! BootForm::text('Titre', $post->title) !!}
    {!! BootForm::text('Slug', $post->slug) !!}
    {!! BootForm::textarea('Contenu', $post->content) !!}
    {!! BootForm::submit('Editer') !!}
    {!! BootForm::close() !!}

Here is my PostController function once I update my post :

 public function update($id, Request $request)
{
    $post = Post::findorFail($id);

    $title = $request->input('title');

    $post->title = $title;
    $post->content = $request->input('Contenu');

    $request->has('save');

    $post->save();
    return redirect(route('news.index'));
}

But once I edit my post, I encouter this error like i am sending empty strings : SQLSTATE[23000]: Integrity constraint violation: 1048 Column 'title' cannot be null (SQL: update posts set title = , content = , updated_at = 2016-12-14 20:48:25 where id = 3)

If you see where is the problem, I could use some help ...

It looks like you use invalid parameters in forms. If you want use default values, you should make it as in example from github:

https://github.com/adamwathan/bootforms

BootForm::text('Titre', 'title')->defaultValue($post->title);

Now you use $post->title as field name, so $_POST['title'] is just empty.

May be two things can be done.

1)You should either allow title column allow null values. ALTER TABLE tableName MODIFY table VARCHAR(200);

2) You can first check if title is set or not and display appropriate error message if its not set.

public function update($id, Request $request)
{
    $post = Post::findorFail($id);

    $title = $request->input('title');
    /*
     First check if tile is not empty
    */
     if (empty($title)){
        //show error message // echo 'Please fill in title or whatever';
     }else{

       $post->title = $title;
       $post->content = $request->input('Contenu');

       $request->has('save');

       $post->save();
       return redirect(route('news.index'));
     }
}

It seems intuitive that title should not be empty, So in my advice you should try the 2nd method first.