Laravel会话变量未更新

Question

I have a complex record stored in session. I want to update parts of this record in session then update the DB row with the session data. So far I have managed to overwrite the entire structure and not just the part of it I intend to.

Example:

base                <-- whole record
base.field1         <-- single field
base.field2         <-- single field
base.field3         <-- single field
base.users          <-- array of objects (users), stored as JSON column
base.details        <-- single dimensional array of fields
base.cards          <-- array of objects (cards), stored as JSON column
base.regions        <-- array of objects (regions), stored as JSON column

This whole structure is stored as a row in a progress table.

I load and store this data in session like this:

session()->put('base', Progress::find($id));

I then update some of the fields in the cards array:

$cards = session()->get('base.cards');
$cards[$index]['points'] = 100;

I then try (unsuccessfully) to update the session variable, having tried both below:

session()->put('base.cards', $cards);
session()->push('base.cards', $cards);
session('base.cards', $cards);

Then lastly I want to store this record in the progress table by updating its instance, like this:

Progress::find($id)->update(session()->get('base'));

How do I manipulate then update in session just one of the JSON/array fields?

UPDATE: I added:

session()->put('base.cards', $cards);
session()->save();

But still, when I dd(session()->get('base')) I get the $cards array?!

Answer 1

I would suggest your problem is caused by you using Session in a way that was not intended. You seem to be storing an Eloquent model called Progress in the Session with the key 'base' and then expecting the get , put and push methods of Session to understand how to interact with your Model's parameters.

How about you make life simple and just store the ID in the Session...

$progress = Progress::find($id);
session()->put('progress_id', $progress->id );
session()->save();

And then when you want to pull it out to manipulate, save in database etc do this...

$progress_id = session()->get('progress_id');
$progress = Progress::find($progress_id);
$progress->cards = $cards->asJSON(); // Give your cards model a method that serialises itself
$progress->save();

Overall your code is now easier to read and everything's being used in a very 'normal' way. The session is just holding an ID, the model exists as a proper Eloquent model being accessed in the documented way.

Future you will be grateful when he comes to review this code :-)

Oh, and if you were storing the model in the session because you're worried about speed, pulling a single record from a properly indexed database is probably no slower than pulling the data from a session. We're talking thousands of a second but please do run tests to put your mind at ease.

Answer 2

Complex structures supported by session storage is limited to arrays.

To benefit from . syntax in key names, you need to convert the model to array, eg:

session()->put('base', Progress::find($id)->toArray());

So you can do later

session()->put('base.cards', $cards);