Looking at the API for Builder it seems that all parts of the query are kept in properties like $joins, $wheres, $groups etc.
I also see those properties are public.
My use case is for example scopes, let's say (pure fiction)
class User extends Model
{
public function scopeIsSmart($query)
{
return $query->join('tests', 'users.id', '=', 'tests.user')
->where('tests.score', '>', 130);
}
public function scopeIsMathGuy($query)
{
return $query->join('tests', 'users.id', '=', 'tests.user')
->where('tests.type', '=', 'math');
}
}
If I now write
User::query()->isSmart()->isMathGuy()->get();
I will get an error for joining the same table 2 times. What is a good way to make the joins array unique? (no duplicate joins)
You can check for existing JOINs:
public function scopeIsMathGuy($query)
{
if (collect($query->getQuery()->joins)->where('table', 'tests')->isEmpty()) {
$query->join('tests', 'users.id', '=', 'tests.user');
}
$query->where('tests.type', '=', 'math');
}
You can also create a helper like joinOnce() (see this PR).
Try this:
$query = Test::query();
if ($request['is_smart']) {
$query->where('score', '>', 130);
}
if ($request['is_math']) {
$query->where('type', 'math');
}
$result = $query->with('users')->all();
$users = $result->get('users');
Related
I tried to pass data from the database to view. Now I have to write some SQL code in the controller. Is it possible to do more queries from two Query Builder instances? Like my code, obviously, it didn't work; it throws an error.
Method Illuminate\Support\Collection::addselect does not exist.
Has anyone a better idea?
class StatisticsController extends Controller
{
public function statistic()
{
$right = DB::table('answers')
->select('questions.question_title', 'questions.chapters_id',
DB::raw('count(*) as rightanswers'))
->join('questions', 'questions.id', '=', 'answers.questions_id')
->where('answers.is_correct', 1)
->groupBy('questions.question_title', 'questions.chapters_id')
->get();
$wrong = DB::table('answers')
->select('questions.question_title', 'questions.chapters_id',
DB::raw('count(*) as wronganswers'))
->join('questions', 'questions.id', '=', 'answers.questions_id')
->where('answers.is_correct', 0)
->groupBy('questions.question_title', 'questions.chapters_id')
->get();
$data = $right->addselect('questions.title', 'chapters_id',
'rightanswers/(rightanswers+wronganswers) as rightigeRate')
->join('wrong', 'right.questions.title', '=', 'wrong.questions.title')
->get();
return view('/statistics', compact('data'));
}
}
I've been trying to solve this for quite a while now. I want to join these two scopes from my Match Model:
public function scopeMainMatches($query)
{
return $query->where('type', 'main');
}
public function scopeDotaMatches($query)
{
return $query->join('leagues', function ($join) {
$join->on('matches.league_id', '=', 'leagues.id')
->select('matches.*')
->where('leagues.type', '=', 'dota2')
->where('matches.type', '=', 'main');
});
}
so basically, when I put in into join eloquent relationship it will be the same like this:
$query = DB::table('matches')
->join('leagues', 'leagues.id', '=', 'matches.league_id')
->select('matches.*')
->where('leagues.type', '=', 'dota2')
->get();
it works fine during the terminal check. but I need to connect 2 scopes for the Controller which looks like this:
$_matches = \App\Match::mainMatches()
->get()
->load('teamA', 'teamB')
->sortByDesc('schedule');
so when I try to connect mainMatches and dotaMatches, it doesn't show up on the matches. although when i run php artisan tinker, it returns the correct output, but it won't show up on the matches table.
$_matches = \App\Match::mainMatches()
->dotaMatches()
->get()
->load('teamA', 'teamB')
->sortByDesc('schedule');
any Ideas how to work on this? TYIA!
I've managed to join two tables in just one scope here is the code:
public function scopeMainMatches($query) {
return $query->join('leagues','leagues.id','=','matches.league_id')->select('matches.*')->where('matches.type', 'main');
}
I read this post which helped, but need more guidance please.
I need a set of Results for a particular $batteryid (on Result) and a particular $age (on Test model) and a particular $gender (from Athlete). Each Test belongs to one athlete. Each test has many results.
Model Battery:
class Battery extends Model{
public function results(){
return $this->hasMany('App\Result');
}
}
Model Result:
class Result extends Model{
public function test(){
return $this->belongsTo('App\Test', 'test_id');
}
public function battery(){
return $this->belongsTo('App\Battery', 'battery_id');
}
}
Model Test:
class Test extends Model{
public function athlete(){
return $this->belongsTo('App\Athlete', 'athlete_id');
}
public function results(){
return $this->hasMany('App\Result');
}
}
I get the correct results with the following, but it's two queries:
$tests = Test::whereHas('Athlete', function($query) use($gender){
$query->wheregender($gender);
})->where('age', $age)->get();
$test_ids = $tests->pluck('id');
$results = Result::where('battery_id', '=', $battery)
->whereIn('test_id', $test_ids)
->get();
I'd like to use model approach, but am completely stuck. test.age not recognised and not sure how to get the age from athlete model. My attempt:
$results = Result::with('test')
->where('test.age', '=', $age)
->join('batteries', 'batteries.id', '=', 'test.battery_id')
//->where('test->athlete().gender', '=' $gender)
->where('battery_id', '=', $battery)
->get();
You can use whereHas for the condition and with method for eager loading it.
$results = Result::whereHas('test', function($q) use ($age) {
$q->where('age', '=', $age);
$q->whereHas('athlete', function ($q) {
$q->where('gender', 'male');
});
})
->with('test')
->whereHas('battery', function($q) use($battery) {
$q->where('battery_id', '=', $battery);
})
->with('battery')
->get();
I want to sort a laravel collection by an attribute of an nested relationship.
So I query all projects (only where the project has tasks related to the current user), and then I want to sort the projects by deadline date of the task relationship.
Current code:
Project.php
public function tasks()
{
return $this->hasMany('App\Models\ProjectTask');
}
Task.php
public function project()
{
return $this->belongsTo('App\Models\Project');
}
UserController
$projects = Project->whereHas('tasks', function($query){
$query->where('user_id', Auth::user()->id);
})->get()->sortBy(function($project){
return $project->tasks()->orderby('deadline')->first();
});
I don't know if im even in the right direction?
Any advice is appreciated!
A nice clean way of doing this is with the . operator
$projects = Project::all()->load('tasks')->sortBy('tasks.deadline');
I think you need to use something like join() and then sort by whatever you need.
For exapmle:
Project::join('tasks', 'tasks.project_id', '=', 'projects.id')
->select('projects.*', DB::raw("MAX(tasks.deadline) as deadline_date"))
->groupBy('tasks.project_id')
->orderBy('deadline_date')
->get()
Update
Project::join('tasks', function ($join) {
$join->on('tasks.project_id', '=', 'projects.id')
->where('tasks.user_id', Auth::user()->id)
->whereNull('tasks.completed');
})
->select('projects.*', DB::raw("MAX(tasks.deadline) as deadline_date"))
->groupBy('tasks.project_id')
->orderBy('deadline_date')
->get()
Update2
Add with in your query as:
->with(['tasks' => function ($q) {
$q->where('user_id', Auth::user()->id)
->whereNull('completed');
})
Try This,
$tasks = Task::with('project')
->where('user_id',Auth::user()->id)
->orderBy('deadline')
->get();
After that you can access project properties like below
$tasks->first()->project()->xxx
In Laravel we can setup relationships like so:
class User {
public function items()
{
return $this->belongsToMany('Item');
}
}
Allowing us to to get all items in a pivot table for a user:
Auth::user()->items();
However what if I want to get the opposite of that. And get all items the user DOES NOT have yet. So NOT in the pivot table.
Is there a simple way to do this?
Looking at the source code of the class Illuminate\Database\Eloquent\Builder, we have two methods in Laravel that does this: whereDoesntHave (opposite of whereHas) and doesntHave (opposite of has)
// SELECT * FROM users WHERE ((SELECT count(*) FROM roles WHERE user.role_id = roles.id AND id = 1) < 1) AND ...
User::whereDoesntHave('Role', function ($query) use($id) {
$query->whereId($id);
})
->get();
this works correctly for me!
For simple "Where not exists relationship", use this:
User::doesntHave('Role')->get();
Sorry, do not understand English. I used the google translator.
For simplicity and symmetry you could create a new method in the User model:
// User model
public function availableItems()
{
$ids = \DB::table('item_user')->where('user_id', '=', $this->id)->lists('user_id');
return \Item::whereNotIn('id', $ids)->get();
}
To use call:
Auth::user()->availableItems();
It's not that simple but usually the most efficient way is to use a subquery.
$items = Item::whereNotIn('id', function ($query) use ($user_id)
{
$query->select('item_id')
->table('item_user')
->where('user_id', '=', $user_id);
})
->get();
If this was something I did often I would add it as a scope method to the Item model.
class Item extends Eloquent {
public function scopeWhereNotRelatedToUser($query, $user_id)
{
$query->whereNotIn('id', function ($query) use ($user_id)
{
$query->select('item_id')
->table('item_user')
->where('user_id', '=', $user_id);
});
}
}
Then use that later like this.
$items = Item::whereNotRelatedToUser($user_id)->get();
How about left join?
Assuming the tables are users, items and item_user find all items not associated with the user 123:
DB::table('items')->leftJoin(
'item_user', function ($join) {
$join->on('items.id', '=', 'item_user.item_id')
->where('item_user.user_id', '=', 123);
})
->whereNull('item_user.item_id')
->get();
this should work for you
$someuser = Auth::user();
$someusers_items = $someuser->related()->lists('item_id');
$all_items = Item::all()->lists('id');
$someuser_doesnt_have_items = array_diff($all_items, $someusers_items);
Ended up writing a scope for this like so:
public function scopeAvail($query)
{
return $query->join('item_user', 'items.id', '<>', 'item_user.item_id')->where('item_user.user_id', Auth::user()->id);
}
And then call:
Items::avail()->get();
Works for now, but a bit messy. Would like to see something with a keyword like not:
Auth::user()->itemsNot();
Basically Eloquent is running the above query anyway, except with a = instead of a <>.
Maybe you can use:
DB::table('users')
->whereExists(function($query)
{
$query->select(DB::raw(1))
->from('orders')
->whereRaw('orders.user_id = users.id');
})
->get();
Source: http://laravel.com/docs/4.2/queries#advanced-wheres
This code brings the items that have no relationship with the user.
$items = $this->item->whereDoesntHave('users')->get();