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')
Related
I have 2 table:
products: id, name
auctions: id, product_id, expired_time
Model product
function getAuctions(){
return $this->hasOne('App\Models\Auction', 'product_id', 'id');
}
How can I do the same as below(auctions.expired_time not working):
Controller
function getProductAuctions(){
return \App\Models\Product::with('getAuctions')->whereHas('getAuctions', function(){})->orderBy('auctions.expired_time', 'asc');
}
Thanks everyone.
You can do it with sortBy() method. That method applies to collections only.
function getProductAuctions(){
$products = \App\Models\Product::all();
return $products->sortBy(function ($product, $key) {
return $product->getAuctions->expired_time;
})
}
This should now sort your products collection by the auctions expired time, if you want reversed order, you can just use sortByDesc() method, rest is the same. Also, in your product model, if you are having hasOne() relationship, rename the function name to getAuction() or even better auction() (singular).
you can use one of these to get sort your result
in your controller
function getProductAuctions(){
return \App\Models\Product::with('getAuctions')->whereHas('getAuctions', function($query){
$query->orderBy('expired_time', 'asc');
})->get();
}
and if you want to sort in your model then just use this
function getAuctions(){
return $this->hasOne('App\Models\Auction', 'product_id', 'id')->orderBy('expired_time', 'asc');
}
and thats all no need to do any thing...your result is already sorted
Thank everyone. I found the answer here and I find it correct: https://laracasts.com/discuss/channels/eloquent/order-by-on-relationship
"When you use the with method the Eloquent makes another query in database to retrieve the related data using whereIn. This is why we can't order by a relation field."
I'm having a really strange issue with my eloquent query. I have a table called Calls which I am joining to Contacts and Companies. I am trying to reference the column calls.id but it has been replaced with the id for Companies.
Here is my query:
$calls=DB::table('calls')
->leftJoin('contacts','calls.contact_id','=','contacts.id')
->leftJoin('companies','calls.company_id','=','companies.id')
->where('completed','=',false)
->orderBy('call_on','asc')
->get();
return $calls;
I have seen on Github that this seems to be a known bug but no-one has put forward a workaround.
Can anyone point me in the right direction?
The most direction solution to your immediate question is to add a select to your Eloquent query:
$calls=DB::select('calls.* from calls')
->leftJoin('contacts','calls.contact_id','=','contacts.id')
->leftJoin('companies','calls.company_id','=','companies.id')
->where('completed','=',false)
->orderBy('call_on','asc')
->get();
return $calls;
Instead of the default select *, explicitly dictate what is returned. However, this can be done a lot more cleanly with Eloquent using models:
Calls::whereHas('companies', function (Builder $query) {
$query->where('completed', false);
})->orderBy('call_on', 'asc')->get();
In order for this to work you need to setup the relationship on the model level:
// App\Calls model:
public function companies() {
return $this->belongsTo(App\Companies::class);
}
// App\Companies model:
public function calls() {
return $this->hasMany(App\Calls::class);
}
I'm trying to do where clause for fortune_code inside joindraw table, comparing with the lucky_fortune_code from product table. How can i access and do the check?
Product::where('status', StatusConstant::PT_ENDED_PUBLISHED)
->where('lucky_fortune_code', '<>', '')
->with(['joindraw' => function ($query){
$query->where('fortune_code', $this->lucky_fortune_code)
->with('user');}])->desc()->get();
Product.php
class Product extends Model
{
public function joindraw(){
return $this->hasMany('App\Models\Joindraw');
}
Joindraw.php
class Joindraw extends Model
{
public function product(){
return $this->belongsTo('App\Models\Product', 'product_id');
}
What you can do is a join:
Product::where('status', StatusConstant::PT_ENDED_PUBLISHED)
->where('lucky_fortune_code', '!=', '')
->join('joindraws', 'joindraws.fortune_code', '=', 'products.lucky_fortune_code')->get();
By the way, you can also omit the second 'product_id' parameter in the belongsTo() relation, as this column name is already assumed by convention.
Also, there is no desc() method on the query builder. Use orderBy('lucky_fortune_code', 'desc') instead.
However, whenever you have to write joins in Laravel, you should think about your relationship structure, because there's probably something wrong.
I have several relationships, one specifically that I would like to use for ordering a list, but I can't seem to find the right way to do it.
Below are my relationships:
public function date(){
return $this->hasOne(agent_billings_dates::class,'id','dateID');
}
public function carrier(){
return $this->hasOne(customer::class,'id','carrierID');
}
As well as two attributes which I have added as appends:
public function getItemCountAttribute(){
return $this->items->count();
}
public function getItemMissingAttribute(){
return $this->itemIssues->count();
}
public function getBatchSumAttribute(){
return $this->items->sum('amount');
These show up all fine when I have the following in my function:
$batches = agent_billings_batches::with(['date','carrier','carrier.carrierDetails'])
->where('status',$request->status)
->get();
But the attributes and the with's fall off when I do this (however the date is sorted appropriately):
$batches = agent_billings_batches::with(['carrier','carrier.carrierDetails'])
->join('agent_billings_dates', 'agent_billings_dates.id', '=', 'agent_billings_batches.dateID')
->orderBy('agent_billings_dates.date','desc')
->where('status',$request->status)
->get();
Am I doing something wrong? I'd appreciate any help anyone could give.
Thanks!
Eloquent does not use Joins when loading relationships. It loads them in a separate query, therefore you cannot order the main result using a relationship at query time, you need to do it after the data is collected:
$batches = agent_billings_batches::with(['date','carrier','carrier.carrierDetails'])
->where('status',$request->status)
->get()
->sortBy(function ($batch) {
return $batch->date->date;
});
I'm building a small application where I'm having many to many relationship between two models something like this:
class Contact extends Model
{
public function company()
{
return $this
->belongsToMany('App\Company', 'company_contact', 'company_id', 'contact_id')->withTimestamps();
}
}
Now while retrieving this I want only the latest model through the pivot table or you may say relational table, for this I'm trying to implement:
public function getData()
{
$allData = Contact::all();
foreach($allData as $data)
{
$getCompany = $data->company()->latest()->first();
$data->company = $getCompany;
}
return response()->json(['model' => $allData], 200);
}
But I'm unable to retrieve the latest table it is showing the same old value or the first value.
Guide me how can I achieve this.
You can try this :
latest() is a function defined in Illuminate\Database\Query\Builder Class.
public function latest($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
OR
public function getData()
{
$allData = Contact::all();
foreach($allData as $data)
{
$getCompany = $data->company()->orderBy('created_at', 'desc')->first();
$data->company = $getCompany;
}
return response()->json(['model' => $allData], 200);
}
So basically idea is if you are finding the relational data from many to many relation like $data->company() in this question and try to sort this with latest it will sort the company table with created_at sorting desc in order to get relational latest data you need to sort through pivot tables i.e.
$getCompany = $data->company()->withPivot('created_at')->orderBy('pivot_created_at', 'desc')->first();
This is how I achieved the latest relational table.
Note: You must have pivot table in your relation, in this answer created_at is the pivot field I'm using.