I have the following database tables:
Seasons
id
number
Teams
id
name
Standings
id
season_id
team_id
The question is, how could I get all of the teams in a season through the standings table. At the moment I am getting all of the teams this way:
$teams = [];
$standings = $season->standings;
foreach($standings as $standing){
$teams[] = $standing->team;
}
Is there a way I could do this using Eloquent relationships? I have tried HasManyThrough with no success. These are what my models look like currently:
class Season extends Eloquent{
public function standings(){
return $this->hasMany('Standing');
}
}
class Standing extends Eloquent{
public function team(){
return $this->belongsTo('Team');
}
}
class Team extends Eloquent{
public function standings(){
return $this->belongsToMany('Standing');
}
}
Your relationships look a little off. Here is all the relationships you should need though only the belongsToMany ones are required for this specific scenario of finding all the teams in a season.
class Season extends Eloquent {
public function teams()
{
return $this->belongsToMany('Team', 'Standings');
}
public function standings()
{
return $this->hasMany('Standing');
}
}
class Team extends Eloquent {
public function seasons()
{
return $this->belongsToMany('Season', 'Standings');
}
public function standings()
{
return $this->hasMany('Standing');
}
}
class Standing extends Eloquent {
public function team()
{
return $this->belongsTo('Team');
}
public function season()
{
return $this->belongsTo('Season');
}
}
You would use the belongsToMany relationship rather than a hasManyThrough to query all the teams in a season. That would look something like...
Season::with('teams')->find($season_id);
foreach($season->teams as $team) {
echo $team->name;
}
Related
I have the following models:
users
id
name
organisation_members
id
organisation_id (FK to organisations)
user_id (FK to users)
unqiue(organisation_id, user_id)
organisations
id
name
A user can be a member to many organisations.
My models are written as follows
class User extends Model {
public function organisationMembers(): HasMany
{
return $this->hasMany(OrganisationMember::class);
}
public function organisations()
{
// TODO: how do I do this one
}
}
class OrganisationMember extends Model {
public function organisation(): BelongsTo
{
return $this->belongsTo(Organisation::class);
}
public function user(): BelongsTo
{
return $this->belongsTo(User::class);
}
}
class Organisation extends Model {
public function organisationMembers(): HasMany
{
return $this->hasMany(organisationMember::class);
}
}
How can I write a relationship method in the User model for organisations?
Thanks to #matiaslauriti comment the answer is:
class User extends Model {
public function organisationMembers(): HasMany
{
return $this->hasMany(OrganisationMember::class);
}
public function organisations()
{
return $this->belongsToMany(Organisation::class, 'organisation_members');
}
}
I have three tables:
comments
id
comment_links
id | comment_id | link_id
links
id
I want to get all Links associated with each Comment. As you can see, CommentLink should act as a pivot table, but I don't know how to set up the relationships to make this work. I think I need to use the hasManyThrough relationship, but I'm not 100% sure.
Here are my current class relationships (they may be wrong):
Comment.php:
class Comment extends Model
{
public function commentLinks()
{
return $this->hasMany('App\CommentLink', 'comment_id', 'id');
}
public function links()
{
// How do I fetch all links here using the pivot table?
}
}
CommentLink.php:
class CommentLink extends Model
{
public function comment()
{
return $this->belongsTo('App\Comment');
}
public function link()
{
return $this->hasOne('App\Link', 'id', 'link_id');
}
}
Link.php:
class Link extends Model
{
public function commentLinks()
{
return $this->belongsToMany('App\CommentLink', 'link_id', 'id');
}
}
What do I need to do here to make this work?
You have the right idea, just using the wrong class names.
class Link extends Model
{
public function comments()
{
return $this->belongsToMany('App\Comment');
}
}
class Comment extends Model
{
public function links()
{
return $this->belongsToMany('App\Link');
}
}
You don't actually need to have a class for your pivot table, but you can if you want.
This is quite a good guide on how to do this.
https://laraveldaily.com/pivot-tables-and-many-to-many-relationships/
There are 2 tables and 2 models. Table "games" has 2 foreign keys "team_a_id" and "team_b_id"
I try to define relationship but can't understand how build this relationship. One game can have only one team A and only one team B. But one team can have many games.
At this moment I have
class Game extends Model
{
public function teamA()
{
return $this->hasOne('App\Models\Team', 'team_a_id');
}
public function teamB()
{
return $this->hasOne('App\Models\Team', 'team_b_id');
}
}
and
class Team extends Model
{
public function gameTeamA()
{
return $this->belongsTo('App\Models\GameSerie', 'team_a_id');
}
public function gameTeamB()
{
return $this->belongsTo('App\Models\GameSerie', 'team_b_id');
}
}
I have to define relationship in order to find all games where team was team_a or team_b.
e.g.
$allGames = $team->games($id);
Also i am not sure that i defined relationships right
It's the other way around. The model with the foreign key has the BelongsTo relationship:
class Game extends Model
{
public function teamA()
{
return $this->belongsTo('App\Models\Team', 'team_a_id');
}
public function teamB()
{
return $this->belongsTo('App\Models\Team', 'team_b_id');
}
}
class Team extends Model
{
public function gameTeamA()
{
return $this->hasOne('App\Models\GameSerie', 'team_a_id');
}
public function gameTeamB()
{
return $this->hasOne('App\Models\GameSerie', 'team_b_id');
}
}
I have a recently started learning Laravel 5.4, I am having trouble with my 3 way table relationship, I've looked at a few articles online regarding many to many, but this relationship is just a "hasOne" on both sides.
Could anyone give me a helpful hint as to how to structure my table relationship, here is the PK/FK relationship:
Users table (id)
Listings table (id, user_id)
Insights table (id, listing_id) - one insight row per listing only.
And the models below:
Users Model
class User extends Model
{
public function listing()
{
return $this->belongsTo('App\Listing');
}
}
Listing Model
class Listing extends Model
{
public function insight()
{
return $this->hasOne('App\Insight');
}
}
Insight Model
class Insight extends Model
{
public function listing()
{
return $this->hasOne('App\Listing');
}
}
And what I am trying to achieve is to query the users own listings, with each listings current insights.
Thanks a bunch.
Simon.
User model
class User extends Model
{
public function listing()
{
return $this->hasOne('App\Listing');
}
}
Listing Model
class Listing extends Model
{
public function insight()
{
return $this->hasOne('App\Insight');
}
public function user()
{
return $this->belongsTo('App\User');
}
}
Insight Model
class Insight extends Model
{
public function listing()
{
return $this->belongsTo('App\Listing');
}
}
And if you want query users with Listing and Insight
$users = User::with(['listing', 'listing.insight'])->get();
foreach($users as $user) {
$user->listing->insight;
}
class User extends Model
{
public function listing()
{
return $this->hasMany(Listing::class);
}
}
class Listing extends Model
{
public function insight()
{
return $this->hasOne(Insight::class);
}
public function user()
{
return $this->belongsTo(User::class);
}
}
class Insight extends Model
{
public function listing()
{
return $this->belongsTo(Listing::class);
}
}
$users = User::with('listing.insight')->get();
foreach($users as $user) {
$user->listing->insight;
}
In my Laravel application I have the following classes:
class Product extends Model
{
public function extended()
{
return $this->morphTo();
}
public function users {
return $this->belongsToMany('App\User', 'products_users', 'product_id');
}
}
class Foo extends Model
{
public function product()
{
return $this->morphOne('App\Product', 'extended');
}
public function bars()
{
return $this->hasMany('App\Bar');
}
}
class Bar extends Model
{
public function product()
{
return $this->morphOne('App\Product', 'extended');
}
public function foo()
{
return $this->belongsTo('App\Foo');
}
}
class User extends Model
{
public function products()
{
return $this->belongsToMany('App\Product', 'products_users', 'user_id');
}
}
I can easily get users of a bar object using Bar::find(1)->product->users and I can also get the bars of a user with User::find(1)->products.
How can I get the users of all bars belonging to a specific foo? That is, Foo::find(1)->users should return all users that have the bars belonging to Foo with id 1. It's basically hasManyThrough with polymorphic and many-to-many relations.
Try something like this:
public function users()
{
$Foo = static::with(['bars', 'bars.products', 'bars.product.users'])->get();
return collect(array_flatten(array_pluck($Foo, 'bars.*.product.users')));
}
This should work for you (code has been tested, but not against the exact same structure as your setup). The first line will return all the users deeply nested through the relationships. The second line will pull out the users, flatten them into an array, then transform the array into a collection.
I created a HasManyThrough relationship for cases like this: Repository on GitHub
After the installation, you can use it like this:
class Foo extends Model {
use \Staudenmeir\EloquentHasManyDeep\HasRelationships;
public function users() {
return $this->hasManyDeep(
User::class,
[Bar::class, Product::class, 'products_users'],
[null, ['extended_type', 'extended_id']]
);
}
}