Retrieving data in Laravel - php

Question

I can't find solution how to retrieve links that belongs to user where campaign is active?
Here are my models:
User model:
public function links(){
return $this->hasMany('Link','user_id');
}
public function analytic(){
return $this->hasManyThrough('Analytic','Link');
}
Campaign model:
public function task(){
return $this->hasMany('Task','campaign_id');
}
public function links(){
return $this->hasManyThrough('Link','Task');
}
Task model:
public function campaign(){
return $this->belongsTo('Campaign','campaign_id');
}
public function links(){
return $this->hasMany('Link','task_id');
}
public function analytic(){
return $this->hasManyThrough('Analytic','Link');
}
Link model:
public function task(){
return $this->belongsTo('Task','task_id');
}
public function user(){
return $this->belongsTo('User','user_id');
}
public function analytic(){
return $this->hasMany('Analytic','link_id');
}
So, admin creates a campaign and task that belongs to campaign and users can start task, once they start task they are getting their link assigned for that task and campaign.
In this case I can easily count all user links:
$user = User::find(1);
echo $user->links->count();
But my question is how to echo only links that are related to active campaigns.
Again: CAMPAIGN has many TASK, TASK has many LINKS, USER has many LINKS.
Get the number of links that belongs to user only for active campaigns.
Similar thing with analytics :(
Every link has many analytics ( tracking clicks )
Analytic model:
public function links(){
return $this->belongsTo('Link','link_id');
}
Also need to echo the count of links only for tasks that are under active campaign.

Answer 1

First off, you don't need to run query for a user if you have his id:
$user=User::find($id); // redundant
// instead
Link::where('user_id', $id)->count();
Now to get those links for active campaigns:
Link::whereHas('task', function ($q) {
$q->whereHas('campaign', function ($q) {
$q->active(); // or where('status', 'active'); see below
});
})->where('user_id', $id)->get();
// of course you can start with $user->links()->whereHas ... instead
My example covers scope for a campaign:
// Campaign model
public function scopeActive($query)
{
$query->where('status', 'active');
}
The same goes for count:
Link::whereHas('task', function ($q) {
$q->whereHas('campaign', function ($q) {
$q->active();
});
})->where('user_id', $id)->count();
You can wrap that whereHas chain in a scope as well:
// Link model
public function scopeOnlyActiveCampaigns($query)
{
$query->whereHas('task', function ($q) {
$q->whereHas('campaign', function ($q) {
$->active();
});
});
}
// then simply:
Link::onlyActiveCampaigns()->where('user_id', $id)->count();
And as stated in the comment: use consistent names for relations, it will make your life easier:
$link->analytic; // collection, better analytics
$analytic->links; // single Link model, better link etc