Laravel Eloquent $model->save() 没有保存但没有错误

Question

When updating my Post model, I run:

$post->title = request('title');
$post->body = request('body');

$post->save();

This does not update my post. But it should according to the Laravel docs on updating Eloquent models . Why is my model not being updated?

• I get no errors.
• The post does not get updated in the db.
• Besides not being updated in the db, nothing else seems odd. No errors. Behavior as normal.
• Result of running this test to see if save succeeded was true .
• This Laravel thread was no help

Post model:

class Post extends Model
{
    protected $fillable = [
        'type',
        'title',
        'body',
        'user_id',
    ];

   ....
}

Post controller:

public function store($id)
{
    $post = Post::findOrFail($id);

    // Request validation
    if ($post->type == 1) {
        // Post type has title
        $this->validate(request(), [
            'title' => 'required|min:15',
            'body' => 'required|min:19',
        ]);

        $post->title = request('title');
        $post->body = request('body');
    } else {
        $this->validate(request(), [
            'body' => 'required|min:19',
        ]);

        $post->body = request('body');
    }

    $post->save();

    return redirect('/');
}

Bonus info

Running dd($post->save()) returns true .

Running

$post->save();

$fetchedPost = Post::find($post->id);
dd($fetchedPost);

shows me that $fetchedPost is the same post as before without the updated data.

Answer 1

Check your database table if the 'id' column is in uppercase 'ID'. Changing it to lower case allowed my save() method to work.

Answer 2

I had the same and turned out to be because I was filtering the output columns without the primary key.

$rows = MyModel::where('...')->select('col2', 'col3')->get();
foreach($rows as $row){
    $rows->viewed = 1;
    $rows->save();
}

Fixed with

$rows = MyModel::where('...')->select('primary_key', 'col2', 'col3')->get();

Makes perfect sense on review, without the primary key available the update command will be on Null.

Answer 3

I had the same problem and changing the way I fetch the model solved it!

Was not saving even though everything was supposedly working just as you have mentioned:

$user = User::find($id)->first(); 

This is working:

$user = User::find($id);

Answer 4

您必须确保调用save()的实例具有属性id

Answer 5

Since Laravel 5.5 laravel have change some validation mechanism I guess you need to try this way.

public function store(Request $request, $id)
{
    $post = Post::findOrFail($id);

    $validatedData = [];

    // Request validation
    if ($post->type == 1) {
        // Post type has title
        $validatedData = $request->validate([
          'title' => 'required|min:15',
          'body' => 'required|min:19',
      ]);
    } else {
      $validatedData = $request->validate([
        'body' => 'required|min:19',
    ]);
    }

    $post->update($validatedData);

    return redirect('/');
}

Answer 6

Running dd() inside a DB::transaction will cause a rollback, and the data in database will not change.

The reason being, that transaction will only save the changes to the database at the very end. Ergo, the act of running "dump and die" will naturally cause the script to cease and no therefore no database changes.

Answer 7

Check your table if primary key is not id ("column name should be in small letters only") if you have set column name with different key then put code in your Model like this

protected $primaryKey   = 'Id';

So this might be one of the possible solution in your case also if your column name contains capital letters. Yes this worked for me fine, You should have column names in small letter, If you don't have then mention it in the model file, mainly for primaryKey by which your model will try to access database.

Answer 8

For use save () method to update or delete if the database has a primary key other than "id". need to declare the attribute primaryKey = "" in the model, it will work

Answer 9

Try this

public function store($id,Request $request)
{
    $post = Post::findOrFail($id);

    // Request validation
    if ($post->type == 1) {
        // Post type has title
         $request->validate([
            'title' => 'required|min:15',
            'body' => 'required|min:19',
        ]);
        $post->update([
              'title' => request('title');
              'body' => request('body');
             ]);
    } else {
         $request->validate([
            'body' => 'required|min:19',
        ]);

        $post->update([
              'body' => request('body');
             ]);
    }

    return redirect('/');
}

Answer 10

In my experience, if you select an Eloquent model from the db and the primary_key column is not part of the fetched columns, your $model->save() will return true but nothing is persisted to the database.

So, instead of doing \App\Users::where(...)->first(['email']) , rather do \App\Users::where(...)->first(['id','email']) , where id is the primary_key defined on the target table.

If the (sometimes micro-optimization) achieved by retrieving only a few columns is not really of importance to you, you can just fetch all columns by doing \App\Users::where(...)->first() , in which case you do not need to bother about the name of the primary_key column since all the columns will be fetched.

Answer 11

If you using transactions. Do not forget call DB::commit();

It must look like this:

try{
    DB::beginTransaction();
    // Model changes
    $model->save();
    DB::commit();
}catch (\PDOException $e) {
    DB::rollBack();
}

Answer 12

I have the same issue although there are try / catch block in controller@action() but there were no response, it just stops at $model->save(); there is no log entry either in apache error.log or laravel.log . I have just wrapped the save() with try / cactch as follows, that helped me to figure out the issue

    try{
        $model->save();
    }
    catch (\PDOException $e) {
        echo $e->getMessage();
    }

Answer 13

I have been experiencing the same issue and found a workaround. I found that I was unable to save() my model within a function called {{ generateUrl() }} on my home.blade.php template. What worked was moving the save() call to the controller that return s the home.blade.php template. (IE, save() ing before the view is return ed, then only performing read operations within {{ generateUrl() }} .)

I was (and am) generating a state to put in a URL on page load:

<!--views/home.blade.php-->

<a href="{{ EveAuth::generateUrl() }}">Add Character</a>

Below is what did not work.

// Providers/EveAuth.php

function generateUrl()
{
    $authedUser = auth()->user();
    if (!$authedUser) {
        return "#";
    }
    $user = User::find($authedUser->id);
    $user->state = str_random(16);
    $user->save();

    $baseUrl = 'https://login.eveonline.com/oauth/authorize?state=';

    return $baseUrl . $user->state;
}

This was able to find() the User from the database, but it was unable to save() it back. No errors were produced. The function appeared to work properly... until I tried to read the User 's state later, and found that it did not match the state in the URL.

Here is what did work.

Instead of trying to save() my User as the page was being assembled, I generated the state , save() d it, then rendered the page:

// routes/web.php

Route::get('/', 'HomeController@index');

Landing at the root directory sends you to the index() function of HomeController.php :

// Controllers/HomeController.php

public function index()
{
    $authedUser = auth()->user();
    if ($authedUser) {
        $user = User::find($authedUser->id);
        $user->state = str_random(16);
        $user->save();
    }
    return view('home');
}

Then, when generating the URL, I did not have to save() the User , only read from it:

// Providers/EveAuth.php

function generateUrl()
{
    $authedUser = auth()->user();
    $user = User::find($authedUser->id);

    $baseUrl = 'https://login.eveonline.com/oauth/authorize?state=';

    return $baseUrl . $user->state;
}

This worked! The only difference (as far as I see) is that I'm save() ing the model before page assembly begins, as opposed to during page assembly.