I have 2 tables:
`tasks {id, task_name, status_id}`
`statuses {id, status_name }`
A task can only have one status at a time eg Pending, Active, Completed, Aborted, etc
This is what I have so far.
class Task extends Eloquent
{
public function status
{
return $this->hasOne('Status', 'id');
}
}
When I try $task->status->status_name, I get 'Trying to get a property of non object' error!
My Status class looks like this
class Status extends Eloquent
{
protected $table = 'statuses';
}
Could you explain why I'm having this error?
Since you got the foreign key in Task table, you can use belongsTo and Eloquent will look for column status_id in tasks table for you.
public function status
{
return $this->belongsTo('Status');
}
for more information http://laravel.com/docs/4.2/eloquent in One to One section
For the error Trying to get a property of non object
Please make sure there is a value in column status_id on table tasks on very record.
Related
I have a ManyToMany relationship between Election and Party to connect parties to multiple elections.
public function parties(): BelongsToMany
{
return $this
->belongsToMany(Party::class)
->using(ElectionParty::class)
->withPivot('has_no_answers', 'published', 'program_pdf', 'program', 'id');
}
On the pivot table election_party I added an auto incrementing id.
Parties can give answers to each election, for which reason I created a hasMany relationship to Answer on the pivot table, referenced by electionparty_id
class ElectionParty extends Pivot
{
public function answers(): HasMany
{
return $this->hasMany(Answer::class);
}
}
Now, to get the answers or in this case it's count, i do this in Blade:
#foreach($election->parties as $party)
{{ $party->pivot->answers->count() }}
#endforeach
This however, does not work, because it does not try to get answers by the pivot table id, which I assumed it would be but by the id of the election:
SQLSTATE[42703]: Undefined column: 7 ERROR: column answers.election_id does not exist LINE 1: select * from "answers" where "answers"."election_id" = $1 a... ^ HINT: Perhaps you meant to reference the column "answers.question_id". (SQL: select * from "answers" where "answers"."election_id" = 16 and "answers"."election_id" is not null)
Am I missing something here or doing something not how it's supposed to be done?
The default keys are generated differently in pivot models. Specify the foreign key:
class ElectionParty extends Pivot
{
public function answers(): HasMany
{
return $this->hasMany(Answer::class, 'electionparty_id');
}
}
I work with laravel 5.4, and I want receive information from my relations tables.
I have 3 tables in phpmyadmin
ATHLETES
ID
FIRST_NAME
LAST_NAME
TYPES
ID
NAME
SLUG
ATHLETES_TYPES
ID
TYPE_ID
ATHLETE_ID
I have 3 models
ATHLETE
TYPE
ATHLETEBYTYPE
How do I need to make the relations models to have name and slug from my table TYPES, with my id from my table athletes?
Thank you.
For this you just need 2 model file ATHLETE and TYPE and use many to many relation.and then you can use ATHLETES_TYPES table as pivot table.
for implement this :
first add this method to ATHLETE model file :
public function types()
{
return $this->belongsToMany(TYPE::class,'ATHLETES_TYPES','ATHLETE_ID','TYPE_ID');
}
secode add this method to TYPE model :
public function athletes()
{
return $this->belongsToMany(ATHLETE::class,'ATHLETES_TYPES','TYPE_ID','ATHLETE_ID');
}
and in last remove ID filed from ATHLETES_TYPES table.
done.
now if you have variable from ATHLETE type with $ATHLETE->types you can get types of than.
read more here :
https://laravel.com/docs/5.4/eloquent-relationships#many-to-many
Here are the relationships, buddy
In App/Athlete.php
class Athlete extends Model
{
public function types(){
return $this->belongsToMany('App\Type');
}
}
In App/Type.php
class Type extends Model
{
public function Athletes(){
return $this->belongsToMany('App\Athlete');
}
}
How to join the three table in Laravel Eloquent model. My table structure is like. It is easy with raw(mysql with left join) query to get the desired result, but it is possible to get via Eloquent.
Customer table
id
title
name
Order table(has customer id)
id
customer_id
Hour table (has order id)
id
order_id
From Hour model I want to get the Customer Details and Order Details. Now I am able to get the Order details like below.
public function order()
{
return $this->belongsTo('App\Models\Order', 'order_id', 'id');
}
How to get the Customer Details?
I tried like below, but not get success
1.return $this->hasManyThrough('App\Models\Customer','App\Models\Order','customer_id','id');
2. return $this->hasManyThrough('App\Models\Customer','App\Models\Order','customer_id','order_id');
Edit 1:
class HourLogging extends Model
{
public function order()
{
return $this->belongsTo('App\Models\Order', 'order_id', 'id');
}
$timeoverview = HourLogging::select('hour_logging.*')->whereRaw("hour_logging.date BETWEEN '".$start_date."' AND '".$end_date."'")->orderBy('date','asc');
$timeoverview->with('order.customer');
return $timeoverview->get();
}
class Order extends Model {
public function customer() {
return $this->belongsTo('App\Models\Customer');
}
}
hasManyThrough works the opposite way to what you're trying to achieve. It would let you get Hour models from your Customer model easily.
In order to get what you need you need to define the relations that go the other way - from Hour to Order to Customer. Add the following relations to your models:
class Hour extends Model {
public function order() {
return $this->belongsTo('App\Models\Order');
}
}
class Order extends Model {
public function customer() {
return $this->belongsTo('App\Models\Customer');
}
}
With those relations in place you should be able to access Order data with $hour->order and Customer data with $hour->order->customer.
One thing to remember: Eloquent offers possibility to eagerly load related data to avoid additional queries. It makes sense to do it when you fetch multiple Hour records at once. You an load all Hour records with related Order and Customer data with the following:
$hours = Hour::with('order.customer')->get();
A Venue has many Subscriptions.
A Subscription has many Subscribers (User).
Theres a pivot table, containing the relation between user_id and subscription_id.
How can I get all Subscribers from a Venue?
I have tried with:
class Venue {
/**
* Members
*/
public function members() {
return $this->hasManyThrough('App\User', 'App\Subscription');
}
}
But it fails with MySQL error:
SQLSTATE[42S22]: Column not found: 1054 Unknown column 'users.subscription_id' in 'on clause' (SQL: select `users`.*, `sub
scriptions`.`venue_id` from `users` inner join `subscriptions` on `subscriptions`.`id` = `users`.`subscription_id` where `
users`.`deleted_at` is null and `subscriptions`.`venue_id` = 1)
How my Subscription model look:
`Subscription`
class Subscription extends Model {
protected $table = 'subscriptions';
/**
* Subscripers
*/
public function subscribers() {
return $this->belongsToMany('App\User');
}
/**
* Venue
*/
public function venue() {
return $this->belongsTo('Venue');
}
}
Simple question: Why are you using a third model for Subscriptions? It sounds like a normal n:m relation between User and Venue, as already written in the comments above.
class User {
public function venues() {
return $this->belongsToMany('App\Venue');
}
}
class Venue {
public function users() {
return $this->belongsToMany('App\User');
}
}
This constellation actually needs three tables, which are (i gave each model a column name):
users
- id
- name
venues
- id
- name
user_venue
- user_id
- venue_id
But to access the relations, you can simply use the Eloquent magic:
// List of all venues (as Venue models) that are in relation with User with id $id
$venues = User::find($id)->venues()->get();
// Returns the alphabetically first user that has a relation with Venue with id $id
$user = Venue::find($id)->users()->orderBy('name', 'asc')->first();
If you need to store additional information in the pivot table (e.g. when the relation has been established), you can use additional pivot fields:
user_venue
- user_id
- venue_id
- created_at
class User {
public function venues() {
return $this->belongsToMany('App\Venue')->withPivot('created_at');
}
}
class Venue {
public function users() {
return $this->belongsToMany('App\User')->withPivot('created_at');
}
}
// Returns the date of the relations establishment for the alphabetically
// first Venue the User with id $id has a relation to
$created_at = User::find($id)->venues()->orderBy('name', 'asc')->first()->pivot->created_at;
I've never tried to do whatever you are trying to do there, because it seems (with the current information) conceptually wrong. I also don't know if it is possible to set up an own model for a pivot table, but I think it should work if the pivot table has an own primary id column. It could probably be helpful if you've a third model that needs to be connected with a connection of two others, but normally that doesn't happen. So try it with pivot tables, like shown above, first.
Alright, I still don't see a good use case for this, but I can provide you a query that works. Unfortunately I wasn't able to get an Eloquent query working, but the solution should be still fine though.
class Venue {
public function members($distinct = true) {
$query = User::select('users.*')
->join('subscription_user', 'subscription_user.user_id', '=', 'users.id')
->join('subscriptions', 'subscriptions.id', '=', 'subscription_user.subscription_id')
->where('subscriptions.venue_id', '=', $this->id);
if($distinct === true) {
$query->distinct();
}
return $query;
}
}
The relation can be queried just as normal:
Venue::find($id)->members()->get()
// or with duplicate members
Venue::find($id)->members(false)->get()
I was trying to get the attendance of each user in a course where the users and the courses have many to many relationship and the attendance table is based on the relationship.
But i couldn't call $user->pivot->attendance(); directly i had to call for the pivot object it self so i can call a function to it as you can see in the answer
The Following is a sample of my Database scheme
I need to run
$users=$course->users;
foreach($users as $user)
{
$user->pivot->attendance(); //error in this line
}
this line gives and error
Call to undefined method
Illuminate\Database\Query\Builder::attendance()
users
id
name
etc
courses
id
name
startDate
endDate
course_user
id
course_id
user_id
payment
regDate
status
userattendance
id
course_user_id
time
inOrOut
And here is the CourseUserPivot Class
class CourseUserPivot extends Eloquent {
protected $table ="course_user";
public function course()
{
return $this->belongsTo('Course');
}
public function user()
{
return $this->belongsTo('User');
}
public function attendance()
{
return $this->hasMany('Userattendance','course_user_id');
}
}
P.S: $user->pivot->payment works and displays the attribute but i cant call methods
You can't use $user->pivot->attendance(); as this calls attendance on the user object not on the pivot object
You will have to fetch the pivot object then call the function like so
CourseUserPivot::find($user->pivot->id)->attendance();
make user that where you used withPivot() function you include the id in the array
like in
class Course{
...
...
public function users()
{
return $this->belongsToMany('Candidate')
->withPivot('id',
'summary',
'status',
'payment'
);
}
}
I was trying to accomplish the same thing, and I was having trouble getting it to work like I wanted until I included the 'id' column of my custom pivot model in the withPivot() method.
For some context, my database structure is:
User table
id
Items Table
id
Sets table (defines a set and the items that can be in an instance of it)
id
Set_User table (Custom Pivot Model, instances of a set created by a user)
id, set_id, user_id
Items_SetUser table (items that belong to a set instance that belong to a user)
item_id, setuser_id
I do this in the controller to get all the sets that user has made an instance of, with custom pivot table data:
$user_sets = \Auth::user()->sets()->withPivot('id', 'name')->get();
And then in blade I can access the items associated with each set instance like this:
$set->pivot->set_items()->count()
Without including 'id' in the call to withPivot(), the above is not possible. Note that set_items() is a method on the custom pivot model that defines a relationship with the items table.