I have the following in my Event model in Laravel 4. The reason I am using QueryBuilder and not Eloquent is I need to have links in each column header in my results table in my view, that when clicked, order the results in asc or desc based on that column.
The issue I'm having is, if I use Eloquent, it won't work as most of the data is pulled through via relationships to other tables, so Eloquent can't find the required columns/fields.
public static function getEvents($perPage = 10)
{
$order = Session::get('event.order', 'start_date.desc');
$order = explode('.', $order);
$columns = array(
'events.id as id',
'title',
'locations.city as city',
'suppliers.name as supplier_name',
'venues.name as venue_name',
'start_date',
'courses.price as course_price',
'type',
'status',
'max_delegates as availability',
'tutors.first_name as tutor_first_name',
'tutors.last_name as tutor_last_name',
'contacts.first_name as d_first_name'
);
$events = DB::table('events')
->leftJoin('courses', 'course_id', '=', 'courses.id')
->leftJoin('suppliers', 'supplier_id', '=', 'suppliers.id')
->leftJoin('locations', 'location_id', '=', 'locations.id')
->leftJoin('venues', 'venue_id', '=', 'venues.id')
->leftJoin('event_types', 'event_type_id', '=', 'event_types.id')
->leftJoin('event_statuses', 'event_status_id', '=', 'event_statuses.id')
->leftJoin('tutors', 'tutor_id', '=', 'tutors.id')
->leftJoin('delegate_event', 'delegate_event.event_id', '=', 'events.id')
->leftJoin('delegates', 'delegates.id', '=', 'delegate_event.delegate_id')
->leftJoin('contacts', 'delegates.contact_id', '=', 'contacts.id')->groupBy('events.id')
->select($columns)
->orderBy($order[0], $order[1])
->paginate($perPage);
return $events;
}
If you look at my EventsController at the getOrder method:
public function getOrder($order)
{
Session::put('event.order', $order);
return Redirect::back();
}
You can see I am storing the order in the session and then in my model using that to sort the order of results.
Is there a way to do this in Eloquent the way I need to?
You know you can just add a join() to eloquent right?
So, as an example, if you have users and each user has some blog posts (i.e. user has_many blogs), you can output an eloquent model showing username and blog title, ordered by blog title, as follows:
user::join('blogs', 'blogs.id','=','users.blog_id')
->order_by('blogs.title', 'asc')
->select(array('users.username', 'blogs.title'))
->paginate(10);
Related
I need get specify columns of the relationship. But both recomended in documentation way don't work for me.
I can do this by specifying the desired columns in the model, but I don't want to do it: maybe in the future I will need this relationship elsewhere with more (or fewer) columns.
Data base: table Author (id, name) and Article (id, title, author_id)
The author_id column is foreign key for id column of Author table.
Controller:
//it display all columns
$pack = Author::with(['Article' => function ($query) {
$query->select('id', 'title');
}])
->where('id', $id)
->get();
//also it display all columns
$pack = Author::query()
->with(['Article' => function ($query) {
$query->select('id', 'title');
}])
->where('id', $id)
->get()
//also it display all columns
$pack = Author::with(['Article:id,title'])
->where('id', $id)
->get();
Model:
class Author extends Model
{
protected $guarded = [];
public function Article()
{
return $this->hasMany('App\Models\Article')
//->select('id', 'title'); //If uncommented, then specifying columns works
;
}
}
Why doesn't specifying columns in the controller work for me?
This is working:
$clients = Client::with([
'contacts' => function ($query) {
$query
->select('client_id', 'first_name', 'last_name')
->where('contact_type_id', '=', 1);
}])
->orderBy('client_name')
->get(['id', 'client_name', 'city', 'state']);
dd($clients);
However, I'm unsure of how to access first_name and last_name on the subquery. They're showing up in the "relations" object in the dump, but in my mind I'm envisioning a dataset that I would access like,
$client->first_name, etc.
When I try to add the fields to the get() method at the end, it doesn't recognize them, so I'm doing something wrong, or I need to access the subquery fields differently.
When you are eager loading the relationships, you are just preloading them.
If your relationship is defined as hasMany (which seems to be the case here, a Client hasMany Contact), then you'll always get a collection from eager loading.
If you defined another relationship in your model in order to get only one result, for instance:
public function contact()
{
return $this->hasOne(Contact::class)->where('contact_type_id', 1)->latest('id');
}
Your new relationship contact would return only one result:
$clients = Client::with('contact')
->orderBy('client_name')
->get(['id', 'client_name', 'city', 'state']);
foreach($clients as $client){
dd($client->contact->first_name);
}
// each Client of $clients would have a ->contact relationship
You should add field id to select() method in subquery and field contact_id to get() method
$clients = Client::with(['contacts' => function ($query) {
$query->select('id', 'client_id', 'first_name', 'last_name')->where('contact_type_id', '=', 1);
}])
->orderBy('client_name')
->get(['id', 'client_name', 'city', 'state', 'contact_id']);
foreach ($clients as $key => $client) {
dd($client->contacts->first_name);
// Or
dd($client->contacts()->first()->first_name);
}
I have comics and categories related many to many through pivot tables. I use join and groupBy caterories.id but it doesn't group categories same comics id.
If I do not use the group
$result = DB::table('comics')
->select('comics.name','categories.title')
->join('category_comic', 'comics.id', '=', 'category_comic.comic_id')
->join('categories', 'category_comic.category_id', '=', 'categories.id')
->get();
I want each comic group category
(source: uphinh.org)
First of all
try tou use Laravel Eloquent Relationship and its really cool and very easy to use
In Eloquent Method
In Comics Model
add relationship function
public function cat(){
return $this->hasOne(ComicCategory::class,'id','comic_id'); //ComicCategory::class is your category_comic model
}
Then you just need you Comic Model to get a group of your category com
$result = Comic::with('cat')->get(); //Commic is your model
In query Builder, you need to group manual using foreach
$result = DB::table('comics')
->select('comics.name','categories.title')
->join('category_comic', 'comics.id', '=', 'category_comic.comic_id')
->join('categories', 'category_comic.category_id', '=', 'categories.id')
->get();
$result = json_decode(json_encode($result), TRUE);
$new_result = [];
foreach($result as $row){
$arr[$row['id']]['name'] = $row['name'];
$arr[$row['id']]['cat'][] = $row['title'];
}
and finally rearange the key
$new_result = array_values($new_result );
PS : thats array method, i never group using object method
I have model Company with relation
public function contact()
{
return $this->belongsToMany(\App\Models\Contact::class, 'company_contacts', 'company_id', 'contact_id')
->wherePivot('primary', '=', true)->withPivot('primary');
}
I need to sort items with contact.last_name column.
So I build query
$scope = $scope->leftJoin('company_contacts', "companies.id", '=', "company_contacts.company_id")
->leftJoin('contacts', "company_contacts.contact_id", '=', "contacts.id")
->groupBy(['companies.id', 'contacts.id'])
->select(['companies.*', 'contacts.last_name'])
->order('contacts.last_name');
But this should be more universal
Value of names and tables I can get from $relation
$relation = $scope->getRelation('contact');
$key = $relation->getQualifiedOwnerKeyName(); // etc
And then substitute values into the scope-builder. But I can not get this part::
->wherePivot('primary', '=', true)->withPivot('primary')
I found public property pivotWheres of BelongsToMany class and I can use that.
$relation->pivotWheres
(laravel 4.2)
There are four tables involved; users, posts, flags, and post_flags.
I want to retrieve every post a certain user has, and retrieve the flags set for the post, but only the flags that are set by the user in question.
For example: A post can have flags: 1,2,2,3 where flag 2 is set twice. Once by User A, once by User B. I don't want to see the flags that User B has set.
The Eloquent query in my controller:
$posts = Post::whereHas('companies', function($q) use($company_id) {
$q->where('id', '=', $company_id);
})->with('flags')->get();
The Relation in my Post model:
public function flags() {
return $this->belongsToMany('PostFlag', 'post_postflags', 'post_id', 'flag_id')
->withTimestamps()->withPivot('owner');
}
How would I achieve this using Eloquent ORM?
UPDATE
My final query, thanks to andrewtweber:
Final query
$posts = Post::whereHas('users', function($q) use($id) {
$q->where('id', '=', $id);
})->get()->load([
'flags' => function($query) use($id) {
$query->where('owner', '=', $id)->orWhere('owner', '=', 'SYSTEM');
}
]);
Use wherePivot
http://laravel.com/api/4.2/Illuminate/Database/Eloquent/Relations/MorphToMany.html
$flags = $post->flags()
->wherePivot('user_id', '=', $user_id)
->get();
Or with eager loading
$posts->load([
'flags' => function ($query) use($user_id) {
$query->wherePivot('user_id', '=', $user_id);
}
]);