I am trying to retrieve multiple data from a database in laravel query builder. I get an error at "from".
I tried looking on internet, it keeps talking about join, but I don't want a join.
$showtitles = DB::table('funny_pictures', 'jokes', 'riddles')
->select('title', 'id', 'type')
->from('funny_pictures', 'jokes', 'riddles')
->where('user_id', $user -> id)
->orderBy('created_at')
->paginate(6);
return view('profile', compact('user', 'jokes', 'showtitles'));
This is the query, it gives the error at from
It only selects "funny_pictures" not jokes and riddles.
I would try something like this (with join rather than table with 3 tables in it).
$showtitles = DB::table('funny_pictures')
->join('jokes', 'user_id', $user -> id)
->join('riddles', 'user_id', $user -> id)
->select('title', 'id', 'type')
->from('funny_pictures')
->where('user_id', $user -> id)
->orderBy('created_at')
->paginate(6);
return view('profile', compact('user', 'jokes', 'showtitles'));
Related
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 3 tables this table is related to, I will call this table with
belanja (parent)
anak_belanja (child)
supplier (has relation with parent)
I can create this relation from parent and child but on table supplier I get an error. Usually I use "with" and I get no error, but now I use query builder and I have a problem
My Belanja Model
public function supplier()
{
return $this->belongsTo(\App\Models\Suplier::class ,'supplier_id');
}
My Anak_Belanja model
public function belanja()
{
return $this->belongsTo(\App\Models\Belanja::class ,'belanja_id');
}
and this is my controller
public function render()
{
$user_id = Auth::user()->id;
$sub = SubRincianUraianKegiatan::where('user_id', $user_id)
->where('id' , $this->newid)
->pluck('uraian', 'id');
$sup = Supplier::all()->pluck('nama' ,'id');
$data = DB::table('belanja AS t')
->select([
't.id',
't.uraian',
't.tgl_belanja',
't.supplier_id',
DB::raw('coalesce(sum(p.harga * p.qty),0) AS total_order')
])
->leftjoin('suplier AS s','t.suplier_id','=','s.id') // on here i think this error
->leftjoin('anak_belanja AS p','p.belanja_id','=','t.id')
->where('sub_id', $this->newid)
->where('uraian', 'like', '%'.$this->search.'%')
->groupBy('t.id')
->groupBy('t.uraian')
->groupBy('t.tgl_belanja')
->groupBy('t.suplier_id')
->paginate(10);
return view('livewire.detail-belanja-lw',
['data' => $data ,
'sup' => $sup,
'sub' => $sub,
]);
}
In my blade I try to add supplier like that
{{$i->supplier->nama}}
but I get an error
Undefined property: stdClass::$supplier
Can someone explain my mistake?
$data = DB::table('belanja AS t')
->select([
't.id',
't.uraian',
't.tgl_belanja',
't.suplier_id',
DB::raw('coalesce(sum(p.harga * p.qty),0) AS total_order'),
DB::raw('s.nama as nama')
])
->leftjoin('suplier AS s','t.suplier_id','=','s.id') // on here i think this error
->leftjoin('anak_belanja AS p','p.belanja_id','=','t.id')
->where('sub_id', $this->newid)
->where('uraian', 'like', '%'.$this->search.'%')
->groupBy('t.id')
->groupBy('t.uraian')
->groupBy('t.tgl_belanja')
->groupBy('t.suplier_id')
->paginate(10);
try this.
My model relation
return $this->hasMany('App\Models\Opportunity')->with('user');
My Attempt
$project = Project::find(1);
$$opportunities = $project->opportunities
->where('status', "confirmed");
$opportunities->each(function ($opportunity) {
return $opportunity->get('user');
});
Goal
My goal is to return the data in the following structure:
Opportunities:
Opportunity:
Status,
Amount
Currency
Name
Note that the user is a subset of the opportunity itself.
Problem
This returns a 1024 SQL error.
Ideally
It would be ideal if I can return all this information with the query itself.
Call get() method on your query to get its results first:
$oppurtunities = $project->opportunities()
->where('status', "confirmed")
->get();
You have eager loaded the user instance for each opportunity so just call $opportunity->user to return each opportunity's user:
$project = Project::find(1);
$opportunities = $project
->opportunities()
->where('status', "confirmed")
->get();
$filtered = $opportunities->map(function ($opportunity) {
return [
'status' => $opportunity->status,
'amount' => $opportunity->amount_pledged,
'currency' => $opportunity->currency,
'name' => optional($opportunity->user)->full_name
];
})->all();
I have posts table (id, user_id, title) and Post model with this content
class Post extends Model
{
public function user()
{
return $this->belongsTo('App\User');
}
}
I want to get some post by id and also the user's information, so I use this query
$post = new Post();
$res = $post->where('id', 1)->select('id', 'title', 'user_id')->with([
'user' => function ($query) {
$query->select('id', 'name', 'email');
}
])->first();
It returns the data as expected, and i can access the post's info like $res->title, or the user's info like $res->user->email, but the problem is it makes 2 queries to the database
I would expect to have one query only
SELECT
`posts`.`id`,
`posts`.`title`,
`posts`.`user_id`,
`users`.`id`,
`users`.`email`,
`users`.`name`
FROM
`posts`
LEFT JOIN `users`
ON `posts`.`user_id` = `users`.`id`
WHERE `posts`.`id` = '1'
LIMIT 1
Please note, this is not the same as N+1 problem
https://laravel.com/docs/5.3/eloquent-relationships#eager-loading
I know I can manually do left join,
$res = $post->where('posts.id', 1)
->select('posts.id', 'posts.title', 'posts.user_id', 'users.email', 'users.name')
->leftJoin('users', 'posts.user_id', '=', 'users.id')
->first();
and it will have the one query as I need, but the problem is in the result all data from related table is in the same array (and besides, what is the point of defining/using relationships if i have to manually make a left join every time)
So, my question is how to get the post data with related tables with one query and result organized according to relations: I am curious what is the best practice in laravel and how experienced Laravel developers are doing this ?
Thanks
Eloquent never uses JOINs to retrieve relationship data, but instead uses seperate queries and links the data together in PHP objects. Therefore, you will always have one extra query for each relationship. Also, Eloquent mostly loads all columns (using *).
To link them together, you have to stop using the query builder and instead use Eloquent directly:
$post = Post::find(1)->load('user');
If you insist on using JOINs, you will have to continue using the query builder.
That is eager loading.
You are using
->with([
'user' => function ($query) {
$query->select('id', 'name', 'email');
}
])
In eager loading, what happens is first run above query and get all the users matching the query.
Then the result is applied to the outer query which is
$post->where('id', 1)->select('id', 'title', 'user_id')->with([
'user' => function ($query) {
$query->select('id', 'name', 'email');
}
])->first();
I have the following in my Event model in Laravel 4. The reason I am using QueryBuilder and not Eloquent is I need to have links in each column header in my results table in my view, that when clicked, order the results in asc or desc based on that column.
The issue I'm having is, if I use Eloquent, it won't work as most of the data is pulled through via relationships to other tables, so Eloquent can't find the required columns/fields.
public static function getEvents($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);