I have the following table in my mysql DB
I have a model Shipment and i am using Phalcon's ORM to interact with my DB. The master_id field in this table is actually the id of another raw, but in the same table, as you can see in the picture. The id=1 is the Master Shipment and id=2 and id=3 are Subshipments.
My model right now looks like this
class Shipment extends Model
{
protected $id;
protected $hawb;
protected $master_id;
public function initialize()
{
parent::initialize();
$this->hasMany(
'id',
'Shipment',
'master_id'
);
}
//setters and getters are here
}
When I am using $shipment = ShipmentModel::findFirst($id); in my Controller, i can see the master_id of the Shipment.
What i want to have is, call another function from my Shipment model in order to retrieve all the SubShipments as a Collection of Shipment models, or at least an array with Shipment models.
Or even better, if the ShipmentModel::findFirst($id); could populate the SubShipments automatically (if there are any) would be the best!
I don't really know if the $this->hasMany that I have is correct over there, so if someone could show me how to proceed I would be grateful :)
You need to provide full namespace, not just class name - to solve this Model 'Shipment' could not be loaded. Best is to add alias:
$this->hasMany(
'id',
Shipment::class,
'master_id',
['alias' => 'subShipments'])
);
And then just use:
Shipment::findFirst()->getSubShipments() you can add such method if you want and do return $this->getRelated('subShipments')
Related
I'm confused on how to get my model setup in laravel with a table that is connected to a pivot table.
Here's the problem
Say I have
Locations
id
name
area_types
id
name
area_type_location (Pivot table)
id
location_id
area_type_id
area_test
id
area_type_location_id
clean
headCount
Relationship between the tables are different areas type belongs to different locations.
i.e: beach, 25m pools, kids pools, bbq, etc
area_test is connected to the pivot table because the test has to be generated from area that exists, in this case it is area that is registered under different locations. Thus it has to be tested daily, measured, etc.
I understand the structure between area_types and locations for many to many relationship, however I can't get over my head of how do i structure my area_test model? How do I get the data from locations table -> where are my test?
Should I create a model for my pivot table? Is that a good practice in laravel?
Does anyone has the same use case?
I read about eloquent has many through
relationship but I understand that it does not mention about getting through pivot table. I don't quite get if my use case is the same.
Thanks
Finally, apparently there are a couple of way to get data from locations table to area_tests
Tried at tinker and it works,
First Option
I need to create a Pivot model for my Pivot table:
class LocationAreaType extends Pivot{
public function location(){
return $this->belongsTo(Location::class);
}
public function areaType(){
return $this->belongsTo(AreaType::class);
}
public function AreaTests(){
return $this->hasMany(AreaTest::class, 'area_type_location_id');
}
}
I can use hasManyThrough relation that I need to create in my Location table
public function areaTests()
{
return $this->hasManyThrough(
AreaTest::class,
LocationAreaType::class,
'location_id',
'area_type_location_id');
}
this way I can get the areaTests easily by $location->areaTests, My problem was not determining the area_type_location_id as foreign. You need to determine this, apparently when I extends pivot and use hasMany laravel does not auto recognise the Foreign key by itself.
Second option
Another way to access it is from the relation table, I can define withPivot in the areaTypes() relation then access it like this:
$location->areaType[0]->pivot->areaTests
Since laravel only recognise foreign key from both tables location_id and area_type_id, I have to include the id of the pivot table to get the AreaTest table data
So in the Location model I have to get the column
public function areaTypes()
{
// Get the ID of the pivot table to get the poolTests table (connected with ID column)
return $this->belongsToMany(AreaType::class)
->using(AreaTypeLocation::class)
->withPivot('id');
}
There is no need to create a new model for pivot table.
Just declare in Location model below code:
/**
* #return \Illuminate\Database\Eloquent\Relations\BelongsToMany
*/
public function area_types()
{
return $this->belongsToMany('App\AreaType', 'area_type_location', 'location_id', 'area_type_id');
}
and declare below code in AreaType model:
/**
* #return \Illuminate\Database\Eloquent\Relations\BelongsToMany
*/
public function locations()
{
return $this->belongsToMany('App\Location', 'area_type_location', 'area_type_id', 'location_id');
}
every time you need to get for example the locations of an area_type in every controller, you can call the function like this: $areatype->locations()->get();
Don't forget to create area_type_location table migration.
I have a make table and post table. Make table saves make names as make_code and make_name.
Post table has a column make. While saving a post, it will save make in make_code.
While displaying in blade, I want it to display as make_name. How can I do it?
Currently {{$post->make}} gives me make_code. I need it to show make_name.
I think its a one-to-one relationship that's needed. I tried putting it in model but did not work. How can I achieve it?
MAKE MODEL
class Make extends Model
{
public function make()
{
return $this->belongsTo(App\Post::class);
}
}
POST MODEL:
class Post extends Model
{
protected $table = 'posts';
}
Update
As Tim Lewis noticed:
the relationships can't be named make, as that's a conflict.
Assuming that the your relationship work like this:
a Make has many Post
a Post belongs to a Make object.
| Note: Correct me if I'm wrong.
So, if this is correct, you should define your relationships like this:
Post.php
public function make_rel()
{
return $this->belongsTo(Make::class, 'make', 'make_code');
}
Make.php
public function posts()
{
return $this->hasMany(Post::class, 'make', 'make_code');
}
Check the One-to-Many and One-to-Many (Inverse) relationship sections of the documentation.
So, you could do in your controller (or wherever you want):
$post = Post::find(1);
dd($post->make_rel->make_name); // 'Harley Davidson'
Additionally, you could create a computed property as a shorcout to access this related property in your Post model:
Post.php
// ...
public function getMakeNameAttribute()
{
return $this->make_rel->make_name;
}
Now, you can access it like this:
$post = Post::find(1);
dd($post->make_name); // 'Harley Davidson'
Suggestion
As a suggestion, I strongly advice you to change your foreign key column from make to make_id (in your 'posts' table) to avoid conflicts. Also, you could relate the post to the make primmary key instead of a custom key given the fact that this link is almost invisible and it is handled by Laravel. This would speed up the execution of the query because primmary id's are indexed by default.
In my database I have to save people and the data of people that have a relationship with the first. For example: father, mother, son, daughter, etc
Then the design of the database, I did it in the following way Is a relation many-to-many because, a person have many people related to it.
But I'm not sure if is ok..
class Person extends Model
{
protected $fillable = [
'name',
'surname',
'profile_picture'
.....
];
public function relationships()
{
return $this -> belongsToMany(Person::class);
}
}
When I create the relation I create a thirth migration table call person_person to save the ids and a description (father, mother, son, daughter)
it's ok describe the relationship this way?
public function relationships()
{
return $this -> belongsToMany(Person::class);
}
What should I add to complete successful this relationship?
You'll need to define the table, primary and foreign key, as Laravel likely can't determine this (it'll try, but it probably won't succeed). Something like:
public function relationships(){
return $this->belongsToMany(Person::class, "person_person", "id_person", "id_person_related")
->withPivot(["parentesco"]);
}
or similar. Table name is a bit awkward, consider something else, like 'relationships' or something that conveys more meaning.
See https://laravel.com/docs/5.8/eloquent-relationships#many-to-many for details on how to define additional parameters for belongsToMany()
Laravel provide a nice convention for manyToMany relationship for two different tables but this convention does not work when we need manyToMany relationship in the same table.
solution steps:
create a pivot table and give it a meaningful name like relatives(person_person is not suitable)and create tow columns in this table persion_id and relative_persion_id.
with classname, pass other three arguments as the Table name (relatives), persion_id and relative_persion_id.
this link has perfect solutuion https://laracasts.com/series/laravel-6-from-scratch/episodes/58
public function relationships() { return $this->belongsToMany(Person::class,'relatives','persion_id','relative_persion_id'); }
So I have two tables named 'customers' and 'billing_addresses'.
I also have two models named 'Customer' and 'BillingAddress'.
In the billing_addresses table, there are multiple addresses, each having an 'id'.
In the customers table, each customer has an 'billing_address_id' value corresponding to one of the entries in the billing_addresses table.
What I managed to create so far is:
// Customer relationship method(in the model file)
public function address()
{
return $this->hasOne('App\BillingAddress','id');
}
/////////
// BillingAddress relationship method(in the model file)
public function customer()
{
return $this->hasMany('App\Customer','id');
}
I am indeed getting the right data when I do something like Customer::with('address');
but I feel like there is a better approach for all this as I'm also getting
BadMethodCallException
Call to undefined method
Illuminate\Database\Eloquent\Relations\HasOne::getForeignKey()
when I try to filter with datatables(can't tell if its related but first I'd want to have the best approach on the relationships).
Thank you!
What you want to achieve is this:
// Customer Model
public function address()
{
return $this->belongsTo('App\BillingAddress');
}
// BillingAddress Model
public function customer()
{
return $this->hasMany('App\Customer');
}
You need the belongsTo on your Customer Model because you have the Billing id stored within the Customer table. Eloquent will automatically match the billing id to the foreign Key in your customer model. You just need to follow Eloquente naming conventions for foreign keys. Look here for more infos.
Eloquent Relations
A custom can have multiple billing addresses. So it customer can have many addresses and an address belongs to a customer.
// Customer Model
public function addresses()
{
return $this->belongsTo('App\BillingAddress', 'customer_id');
}
// BillingAddress Model
public function customer()
{
return $this->hasMany('App\Customer', 'billing_address_id');
}
Then you can do : Customer::with('addresses')->get();
Secondly, make sure you are passing correct foreign key column as second parameter to the relationship methods. See documentation for reference
The second error is probably causing because of incorrect foreign key column passed as second argument.
I'm working on a project that has a many to many relationship between User and Club. This relationship works and I can get the respective objects with: $user->clubs. The pivot table I've named memberships. I can get the pivot data with $club->pivot. Foreign keys are defined for the memberships table in migrations.
However, I'd like the pivot table to be represented by a model so that I can easily update attributes of Membership such as role (Or even add a Role model to Membership!) or status.
I've looked at "Defining A Custom Pivot Model" in the docs, but what it says doesn't work for me, I get:
ErrorException
Argument 1 passed to Illuminate\Database\Eloquent\Model::__construct() must be of the type array, object given
I've also looked at this description of how to do it, but it's more or less the same as above.
Membership model:
class Membership extends Eloquent {
protected $table = 'memberships';
public function user()
{
return $this->belongsTo('User');
}
public function club()
{
return $this->belongsTo('Club');
}
}
Has anyone done this before?
This has been solved by a suggestion by a reddit user to extend Pivot in my Membership model. I also had to add ->withPivot('status', 'role')->withTimestamps() to the relationship declarations in the User and Club models.
You can do this by adding some manual code.
Your Membership model looks ok. You can get all clubs of a $user easily if you define method $user->clubs() where you get all the clubs manually.
clubs() {
$memberships=$this->memberships;
$clubs=new \Illuminate\Database\Eloquent\Collection();
foreach($memberships as $m) {
$clubs=$clubs->merge($m->clubs);
}
return $clubs;
}