I am trying this Query in Laravel 5.2
User::with(['posts'])
->withCount('post_images')
->orderBy('post_images_count', 'desc')
->take(8)
->get();
After that I got this error Call to undefined method Illuminate\Database\Query\Builder::post_images()
I did not understand what mistake is here.
Here users table has relation with posts Table and Posts table has relation with post_images table
public function posts()
{
return $this->hasMany(Post::class);
}
public function postimages()
{
return $this->hasManyThrough(PostImage::class, Post::class);
}
Please guide How can I fix this.
As #linktoahref said, withCount is taking a relation method names as argument, not a table nor a column name.
withCount('postimages')should fix your problem
Related
I have a Model RelationDetails with 1 accessor:
public function getFullNameAttribute()
{
return "{$this->FirstName} {$this->Name}";
}
In my controller I have:
$annualPasses = Subscription::entrance()
->whereHas('Activation', function($query)
{
$query->whereDate('ValidUntil', '>=', Carbon::now());
})
->with('RelationDetails')
->get();
But when I want to use in my blade: $annualpass->RelationDetails->FullName I got the error:
Trying to get property 'FullName' of non-object
What am I doing wrong?
It's suppose to be $annualpass->RelationDetails->full_name
Also, return "{$this->FirstName} {$this->Name}"; means that in your DB, your column name is FirstName ... I recommend first_name that way {$this->first_name}. Of course you will have to update your migrations as well.
I recommend going through Laravel Best Practises. Please follow naming standards. Things get easier that way.
What is the function of latest() in laravel?
Example:
public function activity()
{
return $this->hasMany('App\Activity')
->with(['user', 'subject'])
->latest();
}
From Build an activity feed in Laravel on line 44.
I've been looking in the laravel documentation, but I couldn't find it...
latest() is a function defined in Illuminate\Database\Query\Builder Class. It's job is very simple. This is how it is defined.
public function latest($column = 'created_at')
{
return $this->orderBy($column, 'desc');
}
So, It will just orderBy with the column you provide in descending order with the default column will be created_at.
->latest() fetches the most recent set of data from the Database. In short, it sorts the data fetched, using the 'created_at' column to chronologically order the data.
Add ->get() on your code like this:
public function activity()
{
return $this->hasMany('App\Activity')
->with(['user', 'subject'])
->latest()->get();
}
latest() function in Laravel used to get latest records from database using default column created_at.
latest()is the equivalent to orderBy('created_at', 'desc')
In my user model I have added custom attribute get number of post user have created.
I can successfully get that but when I have try to order by it give error.
1054 Unknown column 'posts' in 'order clause'
Can you let us know what is the Eloquent query you're running? Also make sure that the name of the table you're using is correct.
EDIT:
Does the posts column exist in the users table? Or are you trying to get all the posts from the Post Model and order the posts by their name in descending order?
If that is what you want to do then you would need to go to your User Model and set up your relationship with posts.
In User Model create this method:
public function posts() {
return $this->hasMany('Post'); // Post would be the name of the Posts Model
}
In Post model do this:
public function user() {
return $this->belongsTo('User'); // Where User is the name of the Users Model
}
Then according to the Laravel documentation you could do someonething like this with the query:
$users = User::with(array('posts' => function($query)
{
$query->orderBy('name', 'desc'); // assuming that 'name' would be the column in the posts table you want to sort by
}))->take(5)->get();
I hope I am correct and this helps and that solves your issue.
I'm new to Laravel and I'm stuck. This is what I am struggling with:
$questions = Question::find($id)->quiz(); // this code retrieves data from
// the table using the primary key
// in the table. The is a parameter
// that is passed via get.
This is what I have right now:
$questions = Question::where('quiz_id', '=', $id)->quiz();
This is the error I get:
Call to undefined method Illuminate\Database\Query\Builder::quiz()
What I want to do:
I want to run a query to get data from my database table using the foreign key in the table not the primary key, I also want to be able to use relations with this as seen from what I tried to do above.
Edit: Added the Question Model
<?php
class Question extends Eloquent{
protected $table = 'quiz_questions';
public function quiz()
{
return $this->belongsTo('Quiz');
}
}
Calling the quiz() function from Question::find($id)->quiz() will return a Query Builder instance allowing you to query the parent of the Question, its not going to return any data at that point until you call ->get() or another method that actually executes the query.
If you're wanting to return all the questions belonging to a certain quiz then you can do it like this.
$questions = Question::where('quiz_id', $id)->get();
This will return an Eloquent\Collection of the results for all questions with a quiz_id that is equal to $id.
If you've setup the relations between the Quiz and Questions then you can also do this using the Laravel relations.
$quiz = Quiz::findOrFail($id);
foreach($quiz->questions as $question)
{
// Do stuff with $question
}
Laravel will automagically pull Questions from the database that belongTo the Quiz you've already got from the database, this is known as eager loading http://laravel.com/docs/4.2/eloquent#eager-loading
Wader is correct, just calling where() will not execute your query. You either call get() and get an iterable result or use first() if you only want one result.
$quiz = Question::where('quiz_id', '=', $id)->first()->quiz();
I have the following code which works but doesn't seem to follow the laravel eloquent way:
Article::left_join('images', 'articles.id', '=', 'images.article_id')
->join('article_category', 'articles.id', '=', 'article_category.article_id')
->where('article_category.category_id', '=', $category_id)
->get();
I have 4 tables; articles and categories which have a many to many relationship with each other, a pivot table article_category table which holds the article id and category id and an image table which has one to one relationship with an article.
I setup my models as:
class Category extends Eloquent {
public static function get_articles($category_id) {
return static::find($category_id)->has_many_and_belongs_to('Article');
}
class Article extends Eloquent {
public function categories() {
return $this->has_many_and_belongs_to('Category');
}
public function image() {
return $this->has_one('Image');
}
However I can't seem to get all three bits of info together. I can do:
Category::get_articles($current_category)->get();
To get all articles in a given category but I can't seem to get the image for the article, there seems to be nothing I can chain onto? Unless I'm doing it incorrectly? Is there a trick I'm missing?
I even tried the stripped down version from the docs:
foreach (Article::with('image')->get() as $article) {
echo $article->image->foo;
}
However I get an error: Trying to get property of non-object, even though var_dump shows $article->image is an object! Weird.
Thanks
If you have not setup a model for the image table, do that. The ORM needs the model there so it knows what 'Image' refers to.
Can you get the category information using the ::with method or is that troublesome too?