I am using Laravel Collections methods and am trying to key my query results (which are a collection) by the id. The problem is I have multiple entries with the same id, but point to different countries and I want to have all of the values, not just the last one.
Here is my code that i am using so far:
$allCountries = new Collection($allCountries);
$offerCountries = $allCountries->keyBy('id');
dd($offerCountries);
foreach ($offer as $o) {
$o->countries = $allCountries->get($o->id);
}
To explain, my query puts the results in $allCountries which contains ids and countries and those results looks something like this
id=>225, country=>US
id=>225, country=>IT
id=>3304, country=>NZ
Just to give you a quick idea. I want to key this by the id which results in $offerCountries. I then loop thru a previous Collection that contains offers which have a certain ID that relates to the country result by id. So for the offer 225, the countries it contains are US and IT. I loop thru each offer and set the countries object equal to all the $allCountries id that it equals. The problem I have here is keyBy overwrites the value and only takes the last one. I am hoping to get some results like this:
[
225 => countries: {'id' => 225, 'country' => 'US'}, {'id' =>
'225', 'country' => 'IT'}
3304 => ['id' => 3304, 'country' => 'NZ'],
]
Is there a laravel method to do this, or do I need to write my own keyBy so it does not overwrite. If so, how can I get started to write this method?
Thanks
Instead of using keyBy, use groupBy:
$countriesById = collect($allCountries)->groupBy('id');
You could use filter and create a custom filter
$filtered = $allCountries->filter(function ($item) use ($id) {
return $item->id == $id;
});
$filtered->all();
Related
My data looks like:
countyFIPS,County Name,State,stateFIPS,1/22/20,1/23/20,1/24/20,1/25/20,....
1001,Autauga County,AL,1,0,0,0,0,0,0,0,0,....
...
I've been able to retrieve it using an Ajax call and collect it into a simple PHP array, then convert it to json to use in my javascript application. While it appears that the data is all counties of a state, followed by the same configuration for the next state, there is no guarantee that it won't be mixed up in some later set of data.
I'm an old Fortran programmer, and would tend to build a hash table for the "states", then check if the state exists in the hash table. If not create a new hash table and add this empty hash table as the value for the key with the name of the state to the "state" hash table. Then check the state hash table to see if it has a key for the county. Again, if it doesn't, then add an empty array as the value for the key with the county name and add that to the state hash table, then proceed to put the values for that row into the county array. I know this will work, but thought maybe there was some clever way to use associative arrays in PHP to accomplish the same thing.
I look at array_filter, but can't seem to figure out how to adapt it to this case. Are there other functions that might work here?
Then, once I have this structure of
$nested_object = { state1=>{county1,county2,county3...},state2=>{counties}},
and those counties have:
county=>[values],
how can I easily convert this to a json structure? Should it have other keys like "states", and within a state "counties". From looking at Haroldo's question "Convert a PHP object to an associative array" of Dec 3, 2010, it appears like I would use:
$array = json_decode(json_encode($nested_object), true);
Will this give me the structure I am looking for?
I want to end up with a structure that I can ask for the states as a set of keys, then for a selected state ask for the counties in that state as a set of keys, and upon selecting one, get the array of values for that state/county. This has to run on a server with potentially a large amount of data and a moderate amount of hits per unit time so I wanted as reasonably efficient way as possible.
I want to end up with a structure that I can ask for the states as a set of keys, then for a selected state ask for the counties in that state as a set of keys, and upon selecting one, get the array of values for that state/county
Okay, so you need something like:
$structure = [
'AL' => [
'counties' => [
'FIPS1' => 'County1',
'FIPS2' => 'County2',
],
'data' => [
'FIPS1' => [
[ 'date1' => value1, 'date2' => value2, 'date3' => value3... ]
],
],
],
'AK' => [ ... ]
];
You can do that using array_map() and a lambda function writing to $structure, but... in my experience, it is not worth it.
Best to do like you said:
while ($row = get_another_row()) {
$countyFIPS = array_unshift($row);
$countyName = array_unshift($row);
$stateName = array_unshift($row);
$stateFIPS = array_unshift($row);
if (!array_key_exists($stateName, $structure)) {
$structure[$stateName] = [
'counties' => [ ],
'data' => [ ],
];
}
if (!array_key_exists($countyFIPS, $structure[$stateName]['counties'])) {
$structure[$stateName]['counties'][$countyFIPS] = $countyName;
$structure[$stateName]['data'][$countyFIPS] = [ ];
}
// Now here you will have $headers, obtained from the header row unshifting
// the first four fields.
foreach ($headers as $i => $key) {
$structure[$stateName]['data'][$countyFIPS][$key] = $row[$i];
}
}
This way if you add two CSVs with different dates, the code will still work properly. Dates will not be sorted though, but you can do that with a nested array_map and the aksort function.
To output this in JSON, just use json_encode on $structure.
I have table attribute_values(id, value, attr_group_id).
I need to return the collection grouped by key attr_group_id.
in clear php using ORM RedBean i made:
$data = \DB::table('attribute_values')->get();
$attrs = [];
foreach ($data as $k => $v){
$attrs [$v['attr_group_id']][$k] = $v['value'];
}
return $attrs;
I need same using Laravel, after this one:
$data = \DB::table('attribute_values')->get();
My table
id value attr_group_id
1 one 1
2 two 1
3 three 2
4 four 2
5 five 3
6 six 3
And i need result
Array(
[1] => Array
(
[1] => one
[2] => two
)
[2] => Array
(
[3] => three
[4] => four
)
[3] => Array
(
[5] => five
[6] => six
)
)
Fetch all data, and map it with attribute id of every row will work,
$data = \DB::table('attribute_values')->get();
$attrs = [];
foreach ($data as $key => $value) {
// -> as it return std object
$attrs[$value->attr_group_id][] = $value->value;
}
dd($attrs);
You can use the groupBy() function of collection as:
$data = \DB::table('attribute_values')->get()->groupBy('attr_group_id');
It merges records with same attr_group_id under this field's value as making key of the collection.
Doing all this in raw SQL will be more efficient, SQL database are quite good at these operations. SQL has a group by function, since you are overwriting value, i just get it out with max() (this seems weird, that you overwrite the value, do you actually just want unique results?).
DB::table('attribute_values')
->select('attr_group_id', DB::raw('max(value)'))
->groupBy('attr_group_id')
->get();
EDIT
Since the scope has changed, you can utilize Laravels Collection methods, that is opreations on a Collection.
DB::table('attribute_values')
->get()
->groupBy('attr_group_id')
->toArray();
Friends, this is a ready task that I needed !
I did it myself and you helped me. If anyone interested can read.
I'll explain to you why I needed this particular method. I am doing an online store with a clock and now there was a task to make filters and attributes for filters.
So there are three tables
attribute_groups table
attribute_products table
attribute_values
I need to display the Laravel widget on my .blade.php like as
{{ Widget::run('filter', 'tpl' => 'widgets.filter', 'filter' => null,]) }}
When i creating a new product in the admin panel.
I must to save the product id and attribute_id in attribute_products, but there can be as many attributes as possible for one product. so, if I'll use this option
$data = \DB::table('attribute_values')
->get()
->groupBy('attr_group_id')
->toArray();
I got result:
But! each new array starts with index 0. But I need an index that means its id. attr_group_id from table attribute_value for saving into attribute_products.
And after I see only one method for me.
$data = \DB::table('attribute_values')->get();
$attrs = [];
foreach ($data as $key => $value) {
$attrs[$value->attr_group_id][$value->id] = $value->value;
}
return $attrs;
and the result I was looking for
now you can see what's the difference and what was needed. Array index starts 1,2,3,4,5 and this index = attr_group_id. Unfortunately I could not initially ask the right question. thanks to all.
Laravel Version 5.8
So You need to Group the id
if You need in the Model Way I have created the Model as AttributeValue
$modelWay = \App\AttributeValue::get()
->groupBy('attr_group_id');
if You need in the DBWay I have created the table as attribute_values
$dbWay = \DB::table('attribute_values')
->get()
->groupBy('attr_group_id');
Both Will give the Same Result
I have an object where there are all my articles.
I'm currently looping my object to fill an array where I create an associative table for each article.
In my object I also have a Categories object and I would like to add the label of each category at the end of each associative array previously completed, but
I don't know how to do that.. In the Categories object there may be multiple labels.
My code :
$articles = $this->entityManager->getRepository('SGBundle:Article')->findBy([], ['id'=>'desc']);
$arrayCollection = [];
foreach($articles as $article) {
$arrayCollection[] = [
'id' => $article->getId(),
'date_publication' => $article->getDatePublication(),
...
];
foreach($article->getCategories() as $categorie) {
$arrayCollection[] = ['categorie' => $categorie->getLibelle()];
}
}
On my screenshot, for each article there is an array with 36 values and an array with 1 value and I would like this table to be in the table where there are 36 values. It's possible ?
First gather categories, then add'em to article item:
foreach($articles as $article) {
$categories = [];
foreach($article->getCategories() as $categorie) {
$categories[] = $categorie->getLibelle();
}
$arrayCollection[] = [
'id' => $article->getId(),
'date_publication' => $article->getDatePublication(),
...
//
'categorie' => $categories,
];
}
If the article.categories field is marked as lazy, then it won't be hydrated by default and the $article->getCategories() will perform a new query on each loop round.
Instead of a simple findBy, you might want a custom DQL query in this case to optimize this and get the exact array you want in one single request.
Also note that your current query is fetching all articles of your database. While this is probably your purpose, keep in mind that this could get pretty heavy with the data growing. In most cases, this kind of query should be paginated.
I have this following Yii 2 query
$find = People::find()->where(['c_id' => $c_id])->orderBy('totals DESC, id DESC')->all();
So imagine this query was an array. Everything found by this query has an "id" attribute.
Since it's sorted by "totals", I essentially want to return the position in the array where I can find this specific id.
Currently, I'm using this code.
foreach ($find as $t) {
$arr[] = $t->id;
if ($t->id == $id) {
break;
}
}
$key = count($arr);
return $key;
However, this code is vany wayow on a 100k+ result query.
Is there anyway to speed this up?
You could get the result as an array (instead of object) as
$find = People::find()->where(['c_id' => $c_id])
->orderBy('totals DESC, id DESC')
->asArray()
->all();
then you could find your value using array_search()
$my_index = array_search($id,$find);
but for 100k+ you should find using a direct select in db...instead tha looping on php or load all in php and scan with array_search()
To get array from query in YII, you can use queryAll();
$find = People::find()->where(['c_id' => $c_id])->orderBy('totals DESC, id DESC')->queryAll();
OR, another way to convert the object into an array is:
$find = json_decode(json_encode($find), true); // to convert all data into array.
And once you get results in array, you can implement the actual code for your requirement as given below.
You can use array_search() function to get index of your value.
$a=array("a"=>"red","b"=>"green","c"=>"blue");
echo array_search("red",$a);
The array_search() function search an array for a value and returns the key.
Maybe I didn't understand you correctly but I assume that you are trying to detect the index or key for your desired id inside an array returned from an SQL query that is sorted by some other column like total.
So let us fetch records from the database with your query with a little change asArray() like this
$find = People::find()
->where(['c_id' => $c_id])
->orderBy('totals DESC, id DESC')
->asArray()
->all();
in the result, let us assume the People table returns you an array with the following dataset ordered by columns total and id DESC.
[
0 => [
'id' => 2 ,
'c_id'=>2,
'name' => 'John' ,
'age'=>18,
'totals'=>100,
],
1=>[
'id'=>1,
'c_id'=>55,
'name'=>'Bob',
'age'=>20,
'totals'=>80,
],
2=>[
'id'=>3,
'c_id'=>85,
'name'=>'Peter',
'age'=>15,
'totals'=>75,
]
];
Now if you look into \yii\helpers\ArrayHelper you will find ArrayHelper::getColumn().
Let us use this on the array we received from the query, I assume that you are searching $id inside the column id so we will first filter out the id column like below.
$idsArray = ArrayHelper::getColumn($find, 'id');
this will give us the ids in the following sequence which is in the same order as the initial result set.
[2,1,3]
then lets use the built-in php function array_search()
$key=array_search($yourId,$idsArray);
Hope this is what you are looking for.
I am trying to achieve something like this:
I am using Laravel, and for example to display the results I would do a foreach on the array and display the title, the body etc.
Example
#foreach($resArray as $res)
{{$res->Title}}
#endforeach
And that will display the title of each result in the array, I also have the date in $res->startDate but I am not sure how to list each result with same date under their specific date.
You probably didn't understood..
So for example if I have two notifications from 10/07/2017 and one from 11/07/2017 they will display as this:
10/07/2017
- notification 1
- notification 2
11/07/2017
- notification
I was thinking at an if statement but what statement
if($res->startDate) what so this won't work either, I was thinking to store them in arrays, for example array of date 11/07/2017 and display those arrays but would that even work...
Couldn't find too much from google as I am not too sure how to google this in a good maneer.
EDIT 1
I tried doing this:
$notifResult = notifications::where('userID', '=', $userID)->select('*')->groupBy(['date'])->get();
dd($notifResult);
but it didn't work, first of all, I had 3 results in database, it only got 2 of them and it didn't even group them by date, the two results that are listed before are from different days...
EDIT 2
I added toArray to it and this is what I've got:
still, it only picks two results...
One naive but simple solution is to sort the results by start date and then in the foreach check if the previous date (store it in temp var) is different from the current one, and if true display the new date.
$prevDate = '';
#foreach($resArray as $res)
#if($prevDate != '' && $prevDate != $res->startDate) {
//do sth to break the html and display the new date
#endif
{{$res->Title}}
{{$prevDate = $res->startDate;}}
#endforeach
if i understand your problem you must use group by
$collection = collect([
['date' => '10/07/2017', 'title' => 'notification 1'],
['date' => '10/07/2017', 'title' => 'notification 2'],
['date' => '11/07/2017', 'title' => 'notification'],
]);
$grouped = $collection->groupBy('date');
$grouped->toArray();
dd($grouped);