I have this collection
1 => {#27
+"id": 1
+"name": "Zel"
+"age": "43"
}
2 => {#28
+"id": 2
+"name": "Kol"
+"age": "56"
}
3 => {#29
+"id": 3
+"name": "Mil"
+"age": "32"
}
and I would like to return an array with the key values as a string like this:
[
'id',
'name',
'age',
]
Can someone help me with that, please?
use array_keys :
$keys = array_keys($collection->first());
Laravel collection has a keys() method you could simply use it like this:
$keys = $collection->keys();
$get = $keys->all();
It is all clearly written in the Laravel Documentation
EDIT
After looking at your edit, my first consideration would be that if your collection is consistent you could get the first one and subsequently get the keys from there on:
$keys = $collection->first();
$get = $keys->keys()->all();
Or simply put $collection->first()->keys()->all();
EDIT
Here is how i was able to reproduce your problem:
$collection = collect([
[
'id' => 1,
'name' => 'Zel',
'age' => 43
],
[
'id' => 2,
'name' => 'Kol',
'age' => 56
],
[
'id' => 3,
'name' => 'Mil',
'age' => 32
],
]);
$keys = collect($collection->first())->keys()->all();
Here is the Result I got:
array:3 [▼
0 => "id"
1 => "name"
2 => "age"
]
If it still returns a collection or an object based on your last comment, you could try any one of these:
$keys = $keys->toArray();
$keys = collect($keys)->toArray();
Related
I have an array like this, after I use json_decode ($json = json_decode($items, true);), the result looks like this
array:1 [
61 => array:53 [
"id" => 2790
"name" => "ABC"
"created_at" => "2020-12-04 09:43:57.317"
"updated_at" => "2021-02-16 16:47:16.167"
"deleted_at" => null
"remark" => null
]
]
And Iwant to get the value from field name, how to do it in Laravel??
I try like this but, get error Undefined offset name
dd($array['name']);
The correct way to access the element you're trying to get to is $array[61]["name"];
$array[61] will give you:
array:53 [
"id" => 2790
"name" => "ABC"
"created_at" => "2020-12-04 09:43:57.317"
"updated_at" => "2021-02-16 16:47:16.167"
"deleted_at" => null
"remark" => null
]
Then you can use ["name"] to access the value you're after.
Arr::add doesn't work with dot notation. Arr::set will create a new element only if it does not exist, otherwise, it will overwrite the existing one. There is data_set, it works similar to Arr::set, but it accepts the overwrite flag which does not do what I need (if it's set to false instead of adding a new item, it will just skip setting new value).
My code:
$array = [['name' => 'Test', 'link' => 'test_link'], ['name' => 'Test1', 'link' => 'test1_link']];
$result = [];
$position = 1;
foreach($array as $element) {
Arr::set($result, 'itemListElement.type', 'ListItem');
Arr::set($result, 'itemListElement.position', $position);
Arr::set($result, 'itemListElement.item.name', $element['name']);
Arr::set($result, 'itemListElement.item.link', $element['link']);
$position++;
}
And I would like to have multiple list elements within the itemListElement parent, instead of having one list element which is being overwritten all the time.
Here is what it should look like:
[
"itemListElement" => [
[
"type" => "ListItem",
"position" => 1,
"item" => [
"name" => "Test",
"url" => "test_url",
]
],
[
"type" => "ListItem",
"position" => 1,
"item" => [
"name" => "Test1",
"url" => "test1_url",
]
],
]
]
Can you try this:
$array = [['name' => 'Test', 'link' => 'test_link'], ['name' => 'Test1', 'link' => 'test1_link']];
$result = [];
foreach($array as $key=>$element) {
Arr::set($result["itemListElement"][$key], 'type', 'ListItem');
Arr::set($result["itemListElement"][$key], 'position', $key + 1);
Arr::set($result["itemListElement"][$key], 'item.name', $element['name']);
Arr::set($result["itemListElement"][$key], 'item.link', $element['link']);
}
$result;
CakePHP Version: 4.0.1
Introduction
I have 2 methods that both use the index view, index and search. On index the column can be selected from a select list and a value can be inputted via an input form control enabling a search by column and value. This data is sent via GET to the search method where empty values are checked and the query is executed and the index view is rendered.
In the later 3x versions with the below configuration the index view had the sort on the selected column which is what it is meant to do.
IE: Index view has due_date sorted on the initial load and I select task_name then submit the form to the search method. The task_name has the sort when the view is rendered.
TASKS CONTROLLER
Public pagination property:
public $paginate = [
'sortWhitelist' => [
'Tasks.due_date',
'Tasks.task_name',
'Tasks.type',
'Tasks.priority',
'Tasks.related_to_name',
'Contacts.first_name',
'Contacts.last_name',
'Accounts.account_name',
'Tasks.task_desc'
]
];
Search Method
I initialise the data received from the index method and apply the config to the pagination property and send the query object to the view.
$this->setPage('');
$this->setSort($this->request->getQuery('column'));
$this->setDirection('asc');
// Validation of the page, sort, direction and limit is done here.
// IE: The $this->getSort() must be a string and not be numeric and has a strlen check
// and the $this->getDirection() can only be a string with values 'asc' or 'desc' etc.
if (!empty($this->getPage())) {
$this->paginate['page'] = $this->getPage();
}
$this->paginate['sort'] = $this->getSort();
$this->paginate['direction'] = $this->getDirection();
$this->paginate['limit'] = $this->getLimit();
debug($this->paginate);
$tasks = $this->paginate($query);
$this->set(compact('tasks'));
The result of debug is:
[
'sortWhitelist' => [
(int) 0 => 'Tasks.due_date',
(int) 1 => 'Tasks.task_name',
(int) 2 => 'Tasks.type',
(int) 3 => 'Tasks.priority',
(int) 4 => 'Tasks.related_to_name',
(int) 5 => 'Contacts.first_name',
(int) 6 => 'Contacts.last_name',
(int) 7 => 'Accounts.account_name',
(int) 8 => 'Tasks.task_desc'
],
'sort' => 'Tasks.task_name',
'direction' => 'asc',
'limit' => (int) 25
]
Result
The sort is on the task_name.
A couple of months ago I upgraded to 4 and have just revisted this functionality to find the sort is on the column that was present on index and not the column that was selected. I tried the below to fix the problem:
I referenced this information in the cookbook. And this from SO.
$config = $this->paginate = [
'page' => $this->getPage(),
'sort' => $this->getSort(),
'direction' => $this->getDirection(),
'limit' => $this->getLimit()
];
debug($config);
$tasks = $this->Paginator->paginate($query, $config);
debug($this->Paginator);
$this->set(compact('tasks'));
The result of debug $config is:
[
'page' => '',
'sort' => 'Tasks.task_name',
'direction' => 'asc',
'limit' => (int) 25
]
The result of debug $this->Paginator is:
object(Cake\Controller\Component\PaginatorComponent) {
'components' => [],
'implementedEvents' => [],
'_config' => [
'page' => (int) 1,
'limit' => (int) 20,
'maxLimit' => (int) 100,
'whitelist' => [
(int) 0 => 'limit',
(int) 1 => 'sort',
(int) 2 => 'page',
(int) 3 => 'direction'
]
]
}
NOTE: The whitelist contains limit, sort, page and direction? And the limit is 20 and I don't even have a selection of 20?
Result
The sort is on the due_date and I need it on the task_name.
Extra Info
If I then click the sort on task_name the sort is on the task_name. All the sorts work just not on the initial load?
Question
How can I configure the pagination property so the sort is on the task_name from the initial load of the search method.
Thanks Z.
The fix is a bit costly and not ideal but it does work. I do a redirect on the initial load. Basically submit the form to search then redirect back to search. IE:
if ($this->request->getQuery('initial') === 'yes') {
$redirect = $this->request->getQuery('redirect', [
'action' => 'search',
'?' => [
'method' => 'search',
'column' => $this->getColumn(),
'input' => $this->getInput(),
'page' => $this->getPage(),
'sort' => $this->getSort(),
'direction' => $this->getDirection(),
'limit' => $this->getLimit(),
'filter' => $this->getFilter(),
]
]);
return $this->redirect($redirect);
exit(0);
}
$config = $this->paginate = [
'sortWhitelist' => [
'Tasks.due_date',
'Tasks.task_name',
'Tasks.type',
'Tasks.priority',
'Tasks.related_to_name',
'Contacts.first_name',
'Contacts.last_name',
'Accounts.account_name',
'Tasks.task_desc'
],
'page' => $this->getPage(),
'sort' => $this->getSort(),
'direction' => $this->getDirection(),
'limit' => $this->getLimit()
];
$tasks = $this->Paginator->paginate($query, $config);
$this->set(compact('tasks'));
The sort is now on the task_name.
This negates the initial load problem and simulates usage after the page initially loads where I know the sorts work.
I met some difficulties when I was trying to get value from an array in my php blade.
It has rather clear structure (printed with dd function)
{{dd($attr)}}
array:4 [▼
"id" => "215"
"type" => "select"
"name" => "Status"
"value" => array:2 [▼
"pred" => array:3 [▼
0 => "Employed"
1 => "On vacation"
2 => "Dismissed"
]
"sel_val" => "0"
]
]
And when I want to get a value by key 'sel_val' or 'pred'
print_r($attr['value']['pred']);
it gives me Illegal string offset 'pred'
And it works nice in Controller. What should i do?
It gives that error because pred is also an array. you'll have to do $attr['value']['pred'][0] to get Employed, $attr['value']['pred'][1] to get On vacation, $attr['value']['pred'][2] to get Dismissed and $attr['value']['sel_val'] to get the value of sel_val which is 0 in this case. Hope this helps.
working fine when we send array in compact function in the controller
$record = array('id' => '215', 'type' => 'select', 'value' => array('pred' => array('0'=> 'Employed', '1' => 'On vacation', '2' => 'Dismissed'),'sel_val' => '0'));
return view('home', compact('record'));
I have a hash whose keys is a string and key is array(the complication is that the array is defined in the square bracket), So my hash is like this..
model = {
'add' => [
{'name' => 'abc1', 'value' => 'def' },
{'name' => 'abc2', value => 'ghi'}
],
'remove' => [
{'name' => 'abc1', 'value' => 'def' },
{'name' => 'abc2', value => 'ghi'}
]
};
So what I am trying to achive is that when I try to iterate through the hashes of array
model->{add} as
print $_->{name} foreach(model->{add})
it doesnt work.
I guess this is because the array is in [] instead of ().
Considering the input cannot be changed. please let me know how to get through this...
$model = { 'add' => [ {'name' => 'abc1', 'value' => 'def' },
{'name' => 'abc2', 'value' => 'ghi'} ],
'remove' => [ {'name' => 'abc1', 'value' => 'def' },
{'name' => 'abc2', 'value' => 'ghi'} ] };
print $_->{name} foreach( #{ $model->{add} } );
You have a 3-level nested structure: A HashRef containing ArrayRefs containing HashRefs.
my $model = {
'add' => [
{
'name' => 'abc1',
'value' => 'def'
}, {
'name' => 'abc2',
value => 'ghi'
}
],
'remove' => [
{
'name' => 'abc1',
'value' => 'def'
}, {
'name' => 'abc2',
value => 'ghi'
}
]
};
To access those nested arrays and hashes, you need to dereference them, by adding % or # in front of it, depending on whether it is a hash or array.
my $arrayref = $model->{add};
foreach my $hashref (#$arrayref) {
print $hashref->{name}, "\n";
}
The statement:
print $_->{name} foreach(model->{add})
Does not work because model is a bareword, not a variable. If you have these two pragmas in your code:
use strict;
use warnings;
You will not be able to make mistakes like this. warnings will tell you:
Unquoted string "model" may clash with future reserved word at ...
Name "main::model" used only once: possible typo at ...
Use of uninitialized value in print at ...
And strict will tell you:
Can't use bareword ("model") as a HASH ref while "strict refs" in use at ...
However, if you do not have those two pragmas enabled, Perl will happily print the empty string and be silent about the whole thing. Which makes the mistake rather hard to detect.
The correct way to handle this is to grab the correct scalar value from the hash, and dereference it using the correct sigil. If you look at the key 'add':
'add' => [
You'll see that it has an array reference stored in it, which means the sigil to use is #. You'll need support curly braces to disambiguate the references. Also, you have to refer to your variable as $model.
print $_->{name} for #{ $model->{add} };
Which is the same as
my $adds = $model->{add};
print $_->{name} for #$adds;
First and foremost use use strict; use warnings;
The scalar model should be written as
my $model = { 'add' => [ {'name' => 'abc1', 'value' => 'def' }, {'name' => 'abc2', value => 'ghi'} ], 'remove' => [ {'name' => 'abc1', 'value' => 'def' }, {'name' => 'abc2', value => 'ghi'} ] };
and
print $_->{name} foreach( ( #{ $model->{ add } } ) );