I have categories and items tables. Each item belongs to only one category and each category has many items. So, in Category model I defined this relationship:
public function items()
{ return $this->hasMany('Item', 'catid'); }
and I retrieve data for a category this way:
$category = Category::find($id);
return View::make('admin.categories.catdetails')->with('category', $category);
and in my view I can loop through data:
#foreach ($category->items as $item)
<tr>
<td> {{ $item->name }} </td>
<td> {{number_format($item->price, 2, '.', '')}} </td>
</tr>
#endforeach
but this results in all items in on page. How to make use of laravel pagination in case that I have so many items for one page??
How can I use
::paginate() // in controller or model
->links() // in view
as, so far, it throws many errors and I can't figure it out.
Thanks in advance.
You can call paginate() on the relationship object, which you access by ->items() (not ->items)
$items = $category->items()->paginate(10);
return View::make('admin.categories.catdetails')
->with('category', $category)
->with('items', $items);
Then in your view:
#foreach ($items as $item)
And:
$items->links()
You could use an attribute accessor to achieve what you want. In your model:
public function getPaginatedItemsAttribute(){
return $this->items()->paginate(10);
}
And then you use it like this:
#foreach ($category->paginatedItems as $item)
And:
$category->paginatedItems->links()
Related
I need to get the list of product categories from the table.
2 tables in total. tblProduct & tblProductCatLink
1 product can have many product category link.
tblProductCatLink consists of product_id, category_id
Now from my controller & view, i want to get the list of categories belong to one product.
Product.php
public function productcategorylink(){
return $this->HasMany('App\ProductCategoryLink', 'product_id', 'id');
}
ProductCategoryLink.php
public function projects(){
return $this->hasMany('App\Project', 'id', 'product_id');
}
Controller
foreach ($projects as $project) {
foreach ($project->productcategorylink as $value) {
echo $value->category_id;
}
}
The above code is returning first row of category for the product only. I had 3 rows of records for product 297 in my DB.
I need to access the product category link from the view while I looping the product data
In a controller:
$products = Product::with('productcategorylink')->get();
In view:
#foreach ($products as $product)
#foreach ($product->productcategorylink as $link)
{{ $link->category_id }}
#endforeach
#endforeach
You need to call productcategorylink and projects. So it would be
$projects = projects();
foreach ($projects as $project) {
$productCategoryLink = $project->productcategorylink();
foreach ($productCategoryLink as $value) {
echo $value->category_id;
}
}
First time to try laravel eloquent relatioinstip
I know it's really simple but I am getting this error don't know what's wrong with it
I have 2 tables in data base, news and news_image
in database
Tables:
news
id | header | details
news_image
id | image | news_id
And have 2 models News , newsImage
newsImage model :
class newsImage extends Eloquant {
protected $table = 'news_image';
public function news()
{
return $this->belongsTo('News');
}
}
News model
class News extends Eloquent
{
protected $table = 'news';
public $timestamps = false;
public function image()
{
return $this->hasMany('newsImage');
}
}
The view:
foreach($news as $new)
<tr>
<td> {{$new->id}} </td>
<td> {{ $new->header}}</td>
<td> {{ $new->details }}</td>
</td> {{$new->news->image}}</td>
</tr>
when I run this it's get error :
Trying to get property of non-object (View: /var/www/html/clinics/app/views/news/index.blade.php)
Any ideas on what could be causing this error?
First, assuming what you are passing to your view is an array or Collection of News objects, you should probably be using $new->image to access the News Item relation. By defining the function image() in your News model, you can access the relation with either the ->image or ->image() calls. In either case, what you need to call is probably
$new->image->first()->image
To break that down:
->image gets the Collection of NewsImage relations
->first() gets the first item in the Collection
->image (the secone one) gets the image field from that NewsImage
If the Collection has more than one item, you can instead loop over it to get all of the images as shown in the other answer.
There are a couple things I would change:
In your News model, change the relationship from "image" to "images" since it's a one to many relationship. It just keeps your code clean.
Your foreach loop in your view should loop through all the news models, but remember that each news model has multiple images, so you should have another loop inside your existing loop to display the images, i.e. foreach ($new->images as $image)
#foreach ($news as $new)
<tr>
<td> {{$new->id}} </td>
<td> {{ $new->header}}</td>
<td> {{ $new->details }}</td>
<td>
#foreach ($new->images as $image)
{{ $image->image }}
#endforeach
</td>
</tr>
#endforeach
I was wondering what the cleanest way was to count the number of posts that are connected to a category in my blog.
Here is how the table relationship is set up.
What I have is a hasMany relationship from the Category to the Post models like this:
In Categories Model
public function blog_posts()
{
return $this->hasMany('App\Http\Models\Blog_Post', 'category_id');
}
And in the Blog_Post Model
public function blog_categories()
{
return $this->belongsTo('App\Http\Models\BlogCategories', 'category_id');
}
In effect all I want to do is be able to return to my view the total number of posts that each category has as shown below. Where x is the number of posts within each category.
cat1 (x)
cat2 (x)
cat3 (x)
It's not hard to count I know however as I only want a count I do not want to also retrieve the records as they are not required and I also do not want to create more queries than is necessary.
I have not completed the view as yet but probably a start would be to pass through the categories in a loop to display each and add the count at the same time?
#foreach ($categories as $category)
{!! $category->name !!} - {!! Count of posts here !!}
#endforeach
Hopefully that is clear(ish)!
Eager load the relation in your controller:
public function index()
{
$categories = Category::with('blog_posts')->get();
return view('categories.index', compact('categories'));
}
You can then use the count() method on the blog_posts relation when looping over categories in your view:
#foreach ($categories as $category)
<li>{{ $category->name }} ({{ $category->blog_posts->count() }})</li>
#endforeach
EDIT: Since Laravel 5.3, you can use withCount() to load counts of relations, i.e.
$categories = Category::withCount('blog_posts')->get();
This will make the count available via a property:
foreach ($categories as $category) {
$blog_posts_count = $category->blog_posts_count;
}
The nicest way to do it with eager loading support I know is to create a separate relation with the post count. Check this out:
public function blog_posts_count() {
return $this->hasOne('App\Http\Models\Blog_Post', 'category_id')
->selectRaw('category_id, count(*) as aggregate')
->groupBy('category_id');
}
public function getBlogPostsCountAttribute() {
if(!array_key_exists('blog_posts_count', $this->relations))
$this->load('blog_posts_count');
$related = $this->getRelation('blog_posts_count');
return $related ? (int) $related->aggregate : 0;
}
Usage is simple:
{{ $category->blog_posts_count }}
I have a typical model relation. I have the model QR, which hasMany Rating, and a Model Rating, which belongsTo Qr.
Now I want to output the Ratings, which belong to a single qr model, through a foreach loop like this:
<table>
<tr>
<th>ID</th>
<th>UnitID</th>
<th># of Ratings</th>
</tr>
#foreach($qrs as $qr->ratings)
<tr>
<td>{{$qr->id}}</td>
<td>{{$qr->unit_id}}</td>
<td>{{$qr->ratings->count()}}</td>
</tr>
#endforeach
</table>
This is my Controller:
public function index()
{
//
$unit = Unit::all()->first();
$qrs = Qr::all()->first();
return View::make('index')
->with('unit', $unit)
->with('qrs', $qrs);
}
Here are my two Models
Rating.php:
class Rating extends \Eloquent {
protected $guarded = [];
public function qr(){
return $this->belongsTo('Qr');
}
}
Qr.php:
class Qr extends \Eloquent {
protected $guarded = [];
public function unit(){
return $this->belongsTo('Unit');
}
public function ratings(){
return $this->hasMany('Rating');
}
}
I actually want to output the count of ratings, a Qr-Code has. I know it is possible to do it somehow like this:
{{Rating::where('qr_id', $qr->id)->count()}}
But I want to do it somehow like this in the foreach loop
{{ $Qr->rating->count() }}
If this is somehow possible.
I get the relation, if I just output the first() of Qr and then
var_dump($qrs->ratings->toArray())
But I don't know how to get the count Number of ratings in combination with the foreach loop. Any help would be dearly appreciated.
Couple of things wrong here:
// view:
#foreach($qrs as $qr->rating)
// should be:
#foreach($qrs as $qr)
// controller:
$unit = Unit::all()->first();
$qrs = Qr::all()->first();
// this way you get all Units then fetch first Unit from the collection,
// the same with Qrs, so change it to:
$unit = Unit::all(); // do you need it at all?
$qrs = Qr::with('ratings')->get();
This will solve the problem and in the foreach loop you will be able to access $qr->ratings->count() which will be Collection method.
At first you have used this:
#foreach($qrs as $qr->ratings)
You need to change it to this (as already stated in an answer):
#foreach($qrs as $qr)
Then in your index method you have used this:
public function index()
{
$unit = Unit::all()->first();
$qrs = Qr::all()->first();
return View::make('index')->with('unit', $unit)->with('qrs', $qrs);
}
In this case you need to get a collection of QR models and since Unit and Rating are related to Qr then you may use with and get() to get a collection of QR models like this:
public function index()
{
$qrs = Qr::with(array('unit', 'ratings'))->get();
return View::make('index')->with('qrs', $qrs);
}
Then you'll be able to loop the Qr models in your view like this:
#foreach($qrs as $qr)
<tr>
<td>{{ $qr->id }}</td>
<td>{{ $qr->unit_id }}</td>
<td>{{ $qr->ratings->count() }}</td>
</tr>
#endforeach
I have "posts" table that has many-to-one relationship with "categories" table. The goal is to show all of posts and their categories.
Tables:
Posts: id, content, category_id, etc
Categories: id,name
Here's my code
Models:
class Posts extends Eloquent
{
public static $table = 'posts';
public function categories()
{
return $this->belongs_to('Categories');
}
}
class Categories extends Eloquent
{
public static $table = 'categories';
public function posts()
{
return $this->has_many('posts');
}
}
My controller
public function get_posts()
{
$posts = Posts::with('categories')->all();
return View::make('admin.posts')
->with('title', 'Posts')
->with('posts', $posts);
}
My view
#foreach($posts as $post)
<tr>
<td>{{ $post->title }}</td>
<td>{{ $post->categories->name }}</td>
<td><small> {{$post->updated_at}} </small></td>
<td>
<button>
{{HTML::link_to_route('edit_post','Edit',array($post->id))}}
</button>
{{Form::open('admin/delete','Delete')}}
{{Form::hidden('id', $post->id)}}
<input type="submit" name="edit_post" value="Delete"/>
{{Form::close()}}
</td>
</tr>
#endforeach
ERROR:
Error rendering view: [admin.posts]
Trying to get property of non-object
I am a newbie, please help me solve this issues
{{ $post->categories->name }} before test is categories exists
Example:
#if( ! empty($post->categories))
<td>{{ $post->categories->name }}</td>
#else
#end if
Aesis.
Just use ::all() instead of ::with(..)->all()
categories is an array as you are using a has_many relationship. There are many categories, hence an array is returned, so to access it you have to index it like an array
the correct solution would be
$post->categories[0]->name
Are you using Laravel 4? First the syntax for declaring relationship is hasMany and belongsTo, in camel case. Check it out in Laravel documentation
In view, check if categories are empty collection, ie., whether post has its category:
#if($post->categories->count())
<td>{{ $post->categories->name }}</td>
...
#endif
By the way, I would use singular form as model class name, like Post and Category instead of plural forms. And in Post class I would define inverse one-to-many relationship with singular form, to show there's only one entry in category table for this given Post.
public function category()
{
return $this->belongsTo('Category');
}