Flowing query is working fine on mysql database but how can I retrieve this in laravel? code of mysql is given bellow:
select count('brand_id') from products where brand_id=3
You could do
$number = 3;
DB::table('products')->where('brand_id',$number)->count();
But I recommend using Models
Product::where('brand_id',$number)->count();
Following what laravel has on https://laravel.com/docs/5.6/queries at the aggregates topic:
$products = DB::table('products')->where('brand_id', 3)->count();
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As #PlayMa256 said, you can do exactly this query using
DB::table('products')->where('brand_id', 3)->count();
BUT, if you have defined your models correctly, you can do this directly using you model class. If your model is called Product, then:
Product::where('brand_id', 3)->count();
Another awesome way to do this is by using the magic methods for where clause:
Product::whereBrandId(3)->count();
Related
I have the following query which retrieves the child configuration records (confch) associated with the parent configuration (confp) and it works fine.
$data["items"] = Confp::find(decrypt($type))->Confch;
I just need to paginate the results.
adding ->paginate(10) would definitly not work as it does not exist in the resulting collection. I found nothing helping in the laravel documentation.
How can I do that please?
Try this instead of above code.
$confp = Confp::find(decrypt($type));
$data["items"] = $confp->setRelation('Confch',$confp->Confch()->paginate(10));
Back when I was using CodeIgniter I had functions in my models like
public function GetArticlesFormatted($inactive = FALSE)
and then in my controller I could have had
$articles->GetArticlesFormatted(true);
And so on.
How should I achieve the same with Laravel 5.4? The database of the app I'm building is already built and full and is a mess so most of the "automated" super-restrictive things that Laravel has don't work out of the box.
For example there is a Country Code that I'm retrieving and I need it as is, but in some instances I need it converted in a Country Name which I had in another table.
Right now I just have in my controller wherever I am retrieving data from the model:
$countryResult = Country::where('country_code', $item['country_code'])->first();
$countryArray = $countryResult->toArray();
$item['country'] = $countryArray['country_name'];
Can I somehow achieve that in a more elegant way?
I tried accessors but for some reason couldn't get anything to work for my purposes.
A select query can be used to limit selection to a particular column.
$countryName = Country::select('country_name')
->where('country_code', $item['country_code'])
->first();
Simple question here:
In laravel 5.3 how would I pull the comments from a database table? Is there a clean way of doing it using some of the out-of-the-box features that laravel provides??
Thank you in advance.
Laravel 5.2-5.3, as far as I know, comes with a built-in package called doctrine that allows you to interact with a lot more within a database and it's tables than eloquent. I believe the framework members will eventually add more to the system so you can make more dynamic use of a DB and tables etc.
For the time being this is how I implement accessing the structure (comments included) of a database table:
$settings = SomeModel::where($items_match)->get(); //Making use of Eloquent
$columns = DB::connection('database_name_here')
->getDoctrineSchemaManager()
->listTableDetails('table_name_here');
foreach ($settings as $key => $value) {
if ($comments[$key] = $columns->getColumn($key)->getComment()) {
}
}
It's fairly clean and get's the job done. The only downside I see is it's a double hit to the DB which I'm thoroughly against, I'm working on a way to combine the 2 implementations in laravel so that it's only 1 query doing both jobs.
I have write down this query
Controller
$data = User::where('name',$name)->with('country');
In User model
function country () {
return $this->belongsTo('App\Country');
}
In view
echo $data->country->name;
It is working fine but it run 2 queries :(
Select * from user where name = "xyz"
Select * from country where id = "745"
I want to stop this, I want to fetch data with one query only. Join is the solution, Is any other solution for this?
Unfortunately this is the way Eloquent works. It uses two queries because it's a simpler task to initialise your models and to avoid column naming conflicts.
If you are concerned about performance but still want some sort of querying tool, use the Query Builder shipped with Laravel.
To answer your question, joins will be your best bet.
$data=user::with('country')->where('id',745)->where('name','xyz')->get();
i hope that will help you
I am trying to get related model however i cannot seem to find correct documention. In yii 1.x i can do $jobsprocess->category0, but yii 2.x tell me to do $jobsprocess->getCategory(). This does not return a model but an ActiveQuery. How can I return a model object?
In your query use $model = YourModel::find()->with(['category])->all().
All relations using the getRelation() functions can be access with the with() function, but without the get and lowercase first letter.
You can then access the relational data with $model->category.