I use this hasOneThrough to get user through post to display result inf file:
Controller
File::where('agent_id', $user->id)
->with(['user' => function ($q) {
$q->select('name','phone');
}])->get(['post_id', 'status']);
Model
// __________________________ related__|__through_|_1key_|_2key_|_lkey_|_seclkey
return $this->hasOneThrough('App\User', 'App\Post', 'id', 'id', 'post_id', 'user_id');
// ___________________________________________^ > want to get `hash` from `post`
This work good, but now I need one item from post called hash in this result, is it possible to get any data from through (Post table). Already able to get any data from file and user but how can I get data from through (Post table) ?
I don't know how can do this, so I searched and nothing found, so I couldn't try anything.
You should use hasOne in your model:
public function post(){
return $this->hasOne('App\Post', 'id', 'post_id');
}
And in your controller you can use eager loading but I noticed you get null, in order for this to work, you also have to select the id:
$files = File::where('agent_id', $user->id)->with('user:phone,name', 'post:id,hash')->get(['post_id', 'status']);
If your File table has a post_id, and between posts and files table there is a One to Many relation, just declare a new relation:
public function post(){
return $this->belongsTo('App\Post', 'post_id', 'id');
}
Also keep in mind that if inside a with you want to select only specific fields, you can just do ->with('user:phone,name')
Related
Im trying to make list with comments, including data about user and his car, that are stored in another tables.
Controller contained such query:
Charging::available()
->with('some.ports', 'shares')
->find($id);
And I rewrote it to such:
Charging::available()
->with('some.ports', 'shares')
->with('chargingComments.user')
->with('chargingComments.car')
->find($id);
Thats how ChargingComments model looks like:
public function comments() {
return $this->belongsTo(\App\Models\Charging::class);
}
public function user() {
return $this->belongsTo(\App\Models\User::class);
}
public function car() {
// here 'id' is the row in the table with users cars
// 'car_id' is in the table with comments
return $this->hasOne(\App\Models\UserCar::class, 'id', 'car_id');
}
It returns me data about each comments` user and his car, but btw I have to somehow limit result to 10 rows. I tried to add
'user' => function($query) {
return $query->take(10);
}])
But it didnt work.
Im sure that should be the better way to write this code, but dont know how
try this
Charging::with('some.ports', 'shares')->with('chargingComments.user')->with('chargingComments.car')->find($id)->latest()->take(10)->get();
I've got this query in Laravel that's returning all forums with some extra information:
return Forum::with(['messages.user' => function($query){
$query->select('id', 'name');
}])->withCount('messages')->paginate(10);
but now it eager loads all related messages as well but I only need the author from a message. How could I get this result?
Assuming the table you have for your Message model is messages and that it has the columns forum_id and user_id, and the table for your User model is users you could just define a belongsToMany and get the information that way:
public function users()
{
return $this->belongsToMany(User::class, 'messages')->distinct();
}
then:
return Forum::with(['users' => function($query){
$query->select('users.id', 'users.name');
}])->withCount('messages')->paginate(10);
Hope this helps!
Without eager loading,
//for a particular forum
//Get a forum entity
$forum = Forum::find($id);
// Get its messages as a Collection
$forumMessages = $forum->messages;
// Iterate over each message on the Collection to find its author. This will look for id in the User model based on the 'author_id' stored by you in the message table.The collection $forumMessages will now have the author's name. This is just to give you an idea. Structure accordingly to your needs.
$forumMessages->each(function ($message){
$message->author = User::find($message->author_id)->name;
});
Try using
return Forum::with([
'messages' => function ($messages) {
return $messages->with([
'user' => function ($user) {
return $user->select('id', 'name');
}
])->select('id', 'author'); // you get author from messages
}
])->withCount('messages')->paginate(10);
This also eager loads but you only get id and author. id is needed to make the relationship with user.
I would like to display the posts of everyone the current user follows, ordered by date desc.
I have a many to many relationship supplying all the people the user is following.
$users = User::find(Auth::user()->id)->follow()->get();
I have a one to many relationship displaying the posts for any user.
$updates = App\User::find(?????)->updates()->orderBy('created_at', 'desc')->get();
The question mark's shows where the followers ID's need to be placed.
I can put the above query inside the for each loop but that obviously works its way through each follower rather than all posts in date order.
I suspect I may need to set a new relationship and work from the beginning. Can anyone advise.
User Model
public function updates()
{
return $this->hasMany('App\update');
}
/**
* User following relationship
*/
// Get all users we are following
public function follow()
{
return $this->belongsToMany('App\User', 'user_follows', 'user_id', 'follow_id')->withTimestamps()->withPivot('id');;;
}
// This function allows us to get a list of users following us
public function followers()
{
return $this->belongsToMany('App\User', 'user_follows', 'follow_id', 'user_id')->withTimestamps();;
}
}
Update Model
public function user_update()
{
return $this->belongsTo('App\User');
}
Thank you.
Since you want the posts, it is probably going to be easier starting a query on the Post model, and then filter the posts based on their relationships.
Assuming your Post model has an author relationship to the User that created the post, and the User has a follower relationship to all the Users that are following it, you could do:
$userId = Auth::user()->id;
$posts = \App\Post::whereHas('author.follower', function ($q) use ($userId) {
return $q->where('id', $userId);
})
->latest() // built in helper method for orderBy('created_at', 'desc')
->get();
Now, $posts will be a collection of your Post models that were authored by a user that is being followed by your authenticated user.
I am wanting to limit a controller's function's result to only pass certain columns into the view.
It is necessary because it will be used within an API, and so I need the results to be as streamlined as possible.
I have done this successfully with the following function:
public function getIndex()
{
$alerts = Criteria::select('id', 'user_id', 'coordinate_id', 'alert_name')
->with(['coordinate' => function($q){
$q->select('name', 'id');
}])
->get();
}
So it only returns id, user_id and coordinate_id from the criteria table.
However on the function below, I am using a has query (to access a relationship), and thus, using with afterwards to limit the columns, but it's still returning all:
public function getMatches()
{
$matches = Criteria::select('id')
->has('alerts')
->with(['alerts' => function ($q){
$q->select('id', 'headline', 'price_value', 'price_type');
}])
->with('alerts.user.companies')
->get();
}
But, for example, it's still returning the description column, which is in the alert's table. The with query proceeding the has query clearly isn't working (but it's presenting no errors).
Also, the ->with('alerts.user.companies') query, is returning everything within the user's table, which is also unnecessary. How can I return just the companies table data, that's related to the user, who's related to the alert?
Your help would be greatly appreciated.
Depending what you want to achieve, you could use $hidden property to hide columns you don't want to return as json or arrays.
In your Alert model you could do:
protected $hidden = ['description'];
And this way description field won't be returned.
If it's not the way for you (sometimes you want to return description) you could create extra relationships where you limit fields from database.
You could for example create the following relationship:
public function alertsSimple() {
return $this->hasMany('Alert')->select('id', 'headline', 'price_value', 'price_type', 'criteria_id');
}
Also maybe in your select the problem is that you don't use foreign key at all. You could also try with:
$q->select('id', 'headline', 'price_value', 'price_type','criteria_id');
instead of
$q->select('id', 'headline', 'price_value', 'price_type');
In the documentation of Eloquent it is said that I can pass the keys of a desired relationship to hasManyThrough.
Lets say I have Models named Country, User, Post. A Country model might have many Posts through a Users model. That said I simply could call:
$this->hasManyThrough('Post', 'User', 'country_id', 'user_id');
This is fine so far! But how can I get these posts only for the user with the id of 3 ?
Can anybody help here?
So here it goes:
models: Country has many User has many Post
This allows us to use hasManyThrough like in your question:
// Country model
public function posts()
{
return $this->hasManyThrough('Post', 'User', 'country_id', 'user_id');
}
You want to get posts of a given user for this relation, so:
$country = Country::first();
$country->load(['posts' => function ($q) {
$q->where('user_id', '=', 3);
}]);
// or
$country->load(['posts' => function ($q) {
$q->has('user', function ($q) {
$q->where('users.id', '=', 3);
});
})
$country->posts; // collection of posts related to user with id 3
BUT it will be easier, more readable and more eloquent if you use this instead:
(since it has nothing to do with country when you are looking for the posts of user with id 3)
// User model
public function posts()
{
return $this->hasMany('Post');
}
// then
$user = User::find(3);
// lazy load
$user->load('posts');
// or use dynamic property
$user->posts; // it will load the posts automatically
// or eager load
$user = User::with('posts')->find(3);
$user->posts; // collection of posts for given user
To sum up: hasManyThrough is a way to get nested relation directly, ie. all the posts for given country, but rather not to search for specific through model.
$user_id = 3;
$country = Country::find($country_id);
$country->posts()->where('users.id', '=', $user_id)->get();
$this->hasManyThrough('Post', 'User', 'country_id', 'user_id')->where(column,x);
What happen here is you get the collection in return you can put any condition you want at the end.