Laravel 5如何在使用Blade模板的视图中调用函数时使用参数

Question

I have a foreach in my view which displays tasks.

 @foreach($project_item->getVisibleTasks($tasklist->id) as $task)

And in my model I have the following function:

  public function getVisibleTasks($tasklist_id)
  {
    return $this->hasMany('App\Task', 'project_id')->where('tasklist_id', $tasklist_id)->orderBy('order', 'asc');
  }

The function does work when I delete the parameters. (But shows all the results. Because the where clause is deleted). When I pass a static number (for example 1) in my view, it still doesnt work.

How can I make this work?

Regards,

Dylan

Answer 1

I'm not sure you can use a where clause when setting an eloquent relationship. The Laravel Eloquent Relationship doc page doesn't say that is possible.

If possible use the code below where you rather use the eloquent query builder;

public function getVisibleTasks($tasklist_id){
    return App\Task::where('id',$this->project_id)->where('tasklist_id',$tasklist_id)->orderBy('order', 'asc')->get();
}

Answer 2

it may not be working because the relationship query is being called inside the relationship, you could create a relationship function and a query function, for example

public functon tasks() {
    return $this->hasMany('App\Task', 'project_id');
}

and then your function will be like this

public function getVisibleTasks($tasklist_id)
  {
    return $this->tasks()->where('tasklist_id', $tasklist_id)->orderBy('order', 'asc');
  }

that way laravel fetch the relationship and then filter it.

See this post

Answer 3

This seems odd to me, it looks as though you are defining a relationship and running the query where the relationship is defined. you should first define the relationship in the project_item model

 public function getVisibleTasks()
      {
        return $this->hasMany('App\Task', 'project_id');
      }

Also define the inverse of that relationship.

Then call it from your controller via

$project_item ->getVisibleTasks()->orderBy('order', 'asc'); this will automatically call the data that is related to your model.