I have an eloquent object Performer that has Albums and Albums have Images
Here is setup:
Model Performer->albums():
public function albums()
{
return $this->belongsToMany('Album','performer_albums','performer_id','album_id');
}
Model Album->images()
public function images()
{
return $this->belongsToMany('Image','album_images','album_id','image_id')->withPivot(['type','size']);
}
I have performer object stored as such:
$performer = Performer::where...->first();
Now I need to get Performer's Albums with images where size is 'large'
So to avoid nesting queries, can I use with()?
I tried
$performer->albums()
->with('images')
->wherePivot('size','large')
->get();
But laravel tells me it's trying to use wherePivot for Performer-Album relationship (M-2-M)
PS. I am also aware that I can do this,
$performer = Performer::with('albums')
->with('albums.images')
->.....-conditions for additional fields in album_images....
->get();
but question remains the same.
You need eager load constraints:
$performer->albums()
->with(['images' => function ($q) {
$q->wherePivot('size','large');
}])
->get();
And btw, no, you can't do this:
Performer::with('albums')
->with('albums.images')
->.....-conditions for additional fields in album_images....
->get();
instead you could do:
Performer::with(['albums.images' => function ($q) {
$q-> .....-conditions for additional fields in album_images....
}])->get();
Related
I'm trying to get the right data from the database, I'm retriving a model with a media relation via eloquent, but I want to return a photo that contains the 'main' tag stored in JSON, if this tag is missing, then I would like to return the first photo assigned to this model.
how i assign tags to media
I had 3 ideas:
Use orWhere() method, but i want more likely 'xor' than 'or'
$models = Model::with(['media' => function ($query) {
$query->whereJsonContains('custom_properties->tags', 'main')->orWhere();
}]);
return $models->paginate(self::PER_PAGE);
Raw SQL, but i don't really know how to do this i tried something with JSON_EXTRACT and IF/ELSE statement, but it was to hard for me and it was a disaster
Last idea was to make 2 queries and just add media from second query if there is no tag 'main'
$models = Model::with(['media' => function ($query) {
$query->whereJsonContains('custom_properties->tags', 'main');
}]);
$models_all_media = Model:: with(['media']);
return $models->paginate(self::PER_PAGE);
but i tried something like
for($i=0; $i<count($models); $i++) {
$models->media = $models_all_media
}
but i can't do this without get() method, beacuse i don't know how to change this to LengthAwarePaginator class after using get()
try using whereHas https://laravel.com/docs/9.x/eloquent-relationships
Model::with('media')
->whereHas('media',fn($media)=>$media->whereJsonContains('custom_properties->tags', 'main'))
->paginate(self::PER_PAGE);
as per your comment you can use
$models = Model::with(['media' => function ($query) {
$query->whereJsonContains('custom_properties->tags', 'main');
}])
->leftJoin('media', function ($join) {
$join->on('models.id', '=', 'media.model_id')
->whereNull('media.custom_properties->tags->main');
})
->groupBy('models.id')
->paginate(self::PER_PAGE);
return $models;
I have an API returning an object with one-to-one relation to another object. As the models behind the objects, do have timestamps, these are also delivered when asking API.
// Get all transactions
Route::get('transaction', function() {
return Transaction::with('Personone','Persontwo')->get();
});
How do I prevent Laravel from returning the timestamps of the objects in the API?
I googled, but only found some hints to middleware or response macros but found no example pointing me into the right direction. Maybe you can help me.
You can make attributes "hidden" so that they do not show up in json.
docs
class Transaction extends Model
{
/**
* The attributes that should be hidden for arrays.
*
* #var array
*/
protected $hidden = ['timestamp'];
}
I'm not sure if I get the question correctly but if you want to select from eager loads there are two ways
first one is inline selecting
Route::get('transaction', function () {
return Transaction::with('Personone:id,foo,bar', 'Persontwo:id,foo,bar,foobar')->get();
});
second one is to pass a closure
Route::get('transaction', function () {
return Transaction::with([
'Personone' => function ($query) {
$query->select('id', 'foo', 'bar');
},
'Persontwo' => function ($query) {
$query->select('id', 'foo', 'bar', 'foobar');
}])->get();
});
Eager Loading Specific Columns You may not always need every column
from the relationships you are retrieving. For this reason, Eloquent
allows you to specify which columns of the relationship you would like
to retrieve:
$users = App\Book::with('author:id,name')->get();
Constraining Eager Loads Sometimes you may wish to eager load a
relationship, but also specify additional query constraints for the
eager loading query. Here's an example:
$users = App\User::with(['posts' => function ($query) {
$query->where('title', 'like', '%first%'); }])->get(); In this example, Eloquent will only eager load posts where the post's title
column contains the word first. Of course, you may call other query
builder methods to further customize the eager loading operation:
$users = App\User::with(['posts' => function ($query) {
$query->orderBy('created_at', 'desc'); }])->get();
I have the following query:
$objects = Object::with("prototypes");
As you can see I do request to model Object and join it with prototypes.
The prototypes table has structure:
prototype_id
name
How to make where in above query like as:
$objects = Object::with("prototypes")->where("prototype_id", 3);
Object model:
public function prototypes()
{
return $this->belongsToMany('App\Prototype', 'object_prototype', 'object_id');
}
Prototype model:
public function objects(){
return $this->belongsToMany("App\Object", "object_prototype", "prototype_id", "object_id");
}
If the relationship is correctly set in your Eloquent models, you can use the WhereHas function to query relationship existence.
$objects = Object::with('prototypes')
->whereHas('prototypes', function ($query) {
$query->where('prototype_id', 3);
})
->get();
Just to add on #Jerodev answer.
If you need even more power, you may use the whereHas and
orWhereHas methods to put "where" conditions on your has queries.
These methods allow you to add customized constraints to a
relationship constraint, such as checking the content of a comment:
// Retrieve all posts with at least one comment containing words like foo%
$posts = Post::whereHas('comments', function ($query) {
$query->where('content', 'like', 'foo%');
})->get();
You can read more about Eloquent Relationships
And in your case you can also construct a your query like.
Object::whereHas('prototypes', function ($query)){
$query->where('prototype_id', 3);
})->get();
i have a question regarding whereHas in Laravel
public function index($category = null) {
$videos = Video::with(['content', 'content.categories' => function($query) use ($category) {
return $query->where('name', $category);
}])->paginate(10);
return view('frontend.videos')->with('videos', $videos);
}
Take that method, i have a Video model, the Video Model has a 1-to-1 relationship with the Content Model which in turn has a many-to-many relationship with the Categories Model
I need to get all videos where the which have a content with a category where the name matches whatever has been searched, is this possible? if so how?
I've figured it out, the final solution looks something like this, the eager loading will get me the Categories Model in the Subquery and i can simply use that and check against it.
$videos = Video::whereHas('content.categories', function($categories) use ($category) {
$categories->where('name', $category);
})->paginate(10);
I am testing eloquent for the first time and I want to see if it suit my application.
I have Product table:
id, name
and model:
class Produit extends Eloquent {
public function eavs()
{
return $this->belongsToMany('Eav')
->withPivot('value_int', 'value_varchar', 'value_date');
}
}
and eav table:
id, name, code, field_type
and pivot table:
product_id, eav_id, value_int, value_varchar, value_date
class Eav extends Eloquent {
public function produitTypes()
{
return $this->belongsToMany(
'ProduitType'
->withPivot('cs_attributs_produits_types_required');
}
All this is working.
But I want to search in that relashionship:
e.g: all product that have eav_id=3 and value_int=3
I have tested this:
$produits = Produit::with( array('eavs' => function($query)
{
$query->where('id', '3')->where('value_int', '3');
}))->get();
But I get all the product, and eav data only for these who have id=3 and value_int=3.
I want to get only the product that match this search...
Thank you
I know the question is very old. But added the answer that works in the latest versions of Laravel.
In Laravel 6.x+ versions you can use whereHas method.
So your query will look like this:
Produit::whereHas('eavs', function (Builder $query) {
// Query the pivot table
$query->where('eav_id', 3);
})->get()
My suggestion and something I like to follow is to start with what you know. In this case, we know the eav_id, so let's go from there.
$produits = Eav::find(3)->produits()->where('value_int', '3')->get();
Eager loading in this case isn't going to save you any performance because we are cutting down the 1+n query problem as described in the documentation because we are starting off with using find(). It's also going to be a lot easier to read and understand.
Using query builder for checking multiple eavs
$produits = DB::table('produits')
->join('eav_produit', 'eav_produit.produit_id', '=', 'produits.id')
->join('eavs', 'eavs.id', '=', 'eav_produit.eav_id')
->where(function($query)
{
$query->where('eav_produit.value_int','=','3');
$query->where('eavs.id', '=', '3');
})
->orWhere(function($query)
{
$query->where('eav_produit.value_int','=','1');
$query->where('eavs.id', '=', '1');
})
->select('produits.*')
->get();
Making it work with what you already have...
$produits = Produit::with( array('eavs' => function($query)
{
$query->where('id', '3')->where('value_int', '3');
$query->orWhere('id', '1')->where('value_int', '1');
}))->get();
foreach($produits as $produit)
{
if(!produit->eavs)
continue;
// Do stuff
}
From http://four.laravel.com/docs/eloquent:
When accessing the records for a model, you may wish to limit your results based on the existence of a relationship. For example, you wish to pull all blog posts that have at least one comment. To do so, you may use the has method
$posts = Post::has('comments')->get();
Using the "has()" method should give you an array with only products that have EAV that match your criteria.
$produits = Produit::with( array('eavs' => function($query)
{
$query->where('id', '3')->where('value_int', '3');
}))->has('eavs')->get();