Laravel 5 session array update - laravel

I am having trouble while updating session array value in laravel 5. Here is my function,
public function postCartItemAdd()
{
$id = Request::input('id');
Session::push('items', $id);
dd(Session::all());
}
Instead of pushing a new id into the array it just replaces the existing value leaving single item. Am I doing something wrong?

The problem is the session is saved as a flash data. So, you need to save the session whenever you push the data.
$request->session()->push('user.items', 'item1');
$request->session()->push('user.items', 'item2');
$request->session()->save();

or try this
$items = Session::pull('items');
$items[] = $id;
Session::push('items', $items);

umm i think you used it wrong,
see the DOC
it says
Session::push('user.teams', 'developers');
user is the array and we gonna put a value developers to that array with teams key
so then you need to use it in your case as,
Session::push('items.id', $id);
OR if you need to maintain items as an array with default keys like 0,1,2,3... to put the ids, then items should be an array
so there should be a something like,
Session::put('items', []);
then you can use Session::push('items', $id);
if you need to push ids in to same array as you tried.

Related

How can i sort a laravel's elequent list by another ids

I have a challenge that if I want to sort the records when getting using Laravel's ORM based on a list of IDs, how should I do it?!!!!!!!
I mean :
Suppose we have a table called users, which contains 100 records and each record has a unique ID.
We also have an array of IDs.
$ids = [4,1,2,3]
Now I want to get the list of users, but only the users who are first in the ids array and secondly according to the same order as they are listed in this array.
User::whereIn('id' , $Ids)->sortBy('id',$ids)->get();
Can you think of a solution to do this?
User::whereIn('id' , $Ids)->sortBy('id',$ids)->get();
The collections sortBy() function can take a custom call back this way:
$users = User::whereIn('id', $Ids)->get()
->sortBy(function($user, $key) use($ids) {
return array_search($user->id, $ids);
});
This will sort your collection according to the given array.
You can also reference the docs for more information.
Note that the sortBy() function must act upon a collection, which means that the get() function must come before it.

read manipulate and write to the db in Laravel

I am going to read the data by query, manipulate some values and write it back to the db. I use the code below but I get an error.
$data = DB::table('users')->get()->toArray();
foreach ($data as $d){
$d->id = $id+100;
DB::table('users')->insert($d);
}
Argument 1 passed to Illuminate\Database\Query\Builder::insert() must be of the type array,
but the input is already an array. Do you have a better solution for this?
Ok. let's explain this, what ->toArray() actually did is converting the whole collection to array not casting the selected records to array so if you dd($data) you will find it's an array of objects not array of arrays, so what you need to do is to cast each record in the selected records like so
$data = DB::table('users')->get()->map(function ($user) {
return (array) $user;
})->toArray();
as i said
->toArray() - this will convert the whole collection to array
(array) $user - this will convert the selected record to array
you can simply use increment function
DB::table('users')
->increment('id', 100);
more info : laravel docs

How to apply an operation/functionality on one column during getting data of a table in Laravel Controller?

I want to get all the data of today's Date, but during getting it I want to apply an operation on the data of one column only NOT others. This operation is from another function.
$data = Net::whereDate('created_at', Carbon::today())->get();
I have two options:
During getting data, call to that function on the specific column
After getting data, put a loop and then apply that operation and save data into new object
In this table, there is a column called profit, and I want to encode this profit into alphabets by calling encode_code() function remaining the other data as it is.
I don't know how I can do this, please help me if anyone knows.
You can use a foreach loop to get each object from the collection and for each of those object,call the desired function.
$data = Net::whereDate('created_at', Carbon::today())->get();
foreach($data as $key => $dat)
{
$data[$key]->profit = encode_code($dat->profit);
}
I think you should call the function and turn it like this
I just didn't know what you wanted to do, so this is my best
$data = Net::whereDate('created_at', Carbon::today())->get();
foreach($data as $i => $d){
$data[$i]->profit = encode_codeļ¼ˆ$d->profit);
}
Of course you could loop through your result and encode each row, but this would prevent you from reusing this code.
Instead you could put that encode function directly into the model, so that you can reuse it everywhere:
public function getEncodedProfit() {
return encode_code($this->profit);
}
Now you can just use this function everywhere in your controllers or views like that:
echo $net->getEncodedProfit();

Laravel - Eloquent multiple delete vs destroy array

I was wondering what's the best way to destroy multiples database entries with ELOQUENT and I don't find a way to determine that.
So I have 3 array of id's (2 with ints, 1 with strings).
Is it better to go with a foreach and ->delete() every entry or destroy the array ?
When I look at the destroy function, it states the following :
We will actually pull the models from the database table and call
delete on each of them individually so that their events get fired
properly with a correct set of attributes in case the developers
wants to check these.
And the code clearly shows :
$key = $instance->getKeyName();
foreach ($instance->whereIn($key, $ids)->get() as $model) {
if ($model->delete()) {
$count++;
}
}
So I guess there's no real difference and the destroy function is just to avoid the use of a foreach. Can anyone confirm or inform and explain ?
Thanks :)
At first you need to know the difference between destroy and delete, destroy is think to be used for removing an entity (object/model) and delete for being used on a query builder.
Both are different ways but they have the same purpose you can do like:
Model::destroy(array(1, 2, 3));
or
$ids = explode(",", [1,2,3]);
$model->find($ids)->each(function ($model, $key) {
//Do things before deleting
$model->delete();
});
But as you can see the first one is just more direct, on the second one you can do custom things before deleting.

Doctrine toarray does not convert relations

I followed doctrine documnetation to get started. Here is the documentation.
My code is
$User = Doctrine_Core::getTable("User")->find(1);
when I access relations by $User->Phonenumbers, it works. When I convert User object to array by using toArray() method, it does not convert relations to array. It simply display $User data.
Am I missing something?
By using the find method you've only retrieved the User data which is why the return of toArray is limited to that data. You need to specify the additional data to load, and the best place to do this is usually in the original query. From the example you linked to, add the select portion:
$q = Doctrine_Query::create()
->select('u.*, e.*, p.*') // Example only, select what you need, not *
->from('User u')
->leftJoin('u.Email e')
->leftJoin('u.Phonenumbers p')
->where('u.id = ?', 1);
Then when toArray'ing the results from that, you should see the associated email and phonenumber data as well.
I also noticed an anomaly with this where if you call the relationship first then call the ToArray, the relationship somehow gets included. what i mean is that, taking your own eg,
$User = Doctrine_Core::getTable("User")->find(1);
$num= $User->Phonenumbers->office; // assumed a field 'office' in your phone num table
$userArray = $user->toArray(true);
In the above case, $userArray somehow contains the whole relationship. if we remove the $num assignment it doesn't.
am guessing this is due to doctrine only fetching the one record first, and it's only when you try to access foreign key values that it fetches the other related tables

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