Keeping track of a variable from one controller to another - laravel

Question

Thank you in advance for the assistance.
I am currently learning Laravel and I seem to not be able to wrap my head around a problem.
I am trying to create a quotation and invoice solution for a company that has dealers selling their product.
So what I have is a salesperson that has created a client using a form. The input is stored in a client table.
Schema::create('clients', function (Blueprint $table) {
$table->id();
$table->unsignedBigInteger('user_id');
$table->unsignedBigInteger('system_id');
$table->string('name')->nullable();
$table->string('contact')->nullable();
$table->string('number')->nullable();
$table->string('email')->nullable();
Part of the form the salesperson selects the "system" that they want to quote the client on, this is the system_id above.
The user_id above refers merely to the salesperson that created the client.
Here is my products migration
Schema::create('products', function (Blueprint $table) {
$table->id();
$table->integer('group');
$table->string('code');
$table->string('name');
$table->double('price');
$table->timestamps();
});
The client is stored successfully. Afterwards I use an if statement to determine which route to follow to configure the system.
if ($data['system_id'] == 1){
return redirect(route('system.824'))->with('success', 'Customer details have been saved.');
}elseif($data['system_id'] == 2){
return redirect(route('system.32'))->with('success', 'Customer details have been saved.');
}elseif ($data['system_id']==3){
return redirect(route('system.500'))->with('success', 'Customer details have been saved.');
}
The routes above goes to a certain function inside my SystemsController, here I retrieve the required "groups" as referred to above in my products migration.
These groups are used to configure the systems.
After the systems are configured the data is sent back to the SystemsController for me to perform the required validation and further logic for the configuration on the input received.
After the system is configured it is then sent to the SystemsController where I need to perform some logic based on the form input.
My issue is the accessing the client_id in the SystemsController so I can store the input received into the pivot table I created.
The client_id hasMany products
The products hasMany clients
I need to use the pivot table to keep track of what was quoted on in the configuration for that client. The pivot table will contain the client_id and the product_id with a a final column to save the quantity.
What am I missing here?
Thank you again.

Answer 1

As mentioned in my comments, you could send more data inside the with, either as an array or concatenating more withs.
return redirect(route('system.32'))->with('success', 'Customer details have been saved.')->with('user_id', $userId);
OR
return redirect(route('system.32'))->with(['success' => 'success message', 'user_id' => $userId]);
Referring to your comment, if you want to pass data inside the route action, you would need your route set up like so:
Route::get('path/to/your/route/system_input/{infoId}', 'SystemController#getInput')->name('system.input')
The method in SystemController should accept the parameter.
public function getInput($infoId) {
Then, in your redirect route:
return redirect(route('system.input', ['infoId' => $info->id]) );
Now you will have access to the infoId in your getInput method via $infoId.