I'm still struggeling with the laravel Models. At first I tried doing it all using the tables, but thats not smart, I'll miss out on lots of the laravel functions.
I have the following setup
ProjectTwitterStatus links the projects and the twitter statuses.
TwitterStatus has all the details of a twitter status and has a unique ID ('posted at' datetime of tweet is among the details)
TwitterRetweets has the ID of the TwitterStatus - the actual retweet - and the tweet ID of the retweeted status
TwitterReplies has the ID of the TwitterStatus - that is the actual reply - and/or the user ID if not a reply to a status but to a user.
What I want? To get for each date (DATE(datetime)) the count of the statuses, retweets and replies, using the laravel model relations.
These are the models.
class ProjectTwitterStatus extends Eloquent {
protected $table = 'project_twitter_statuses';
protected $softDelete = true;
public function twitterStatus() {
return $this->belongsTo('TwitterStatus');
}
public function project() {
return $this->belongsTo('Project');
}
}
class TwitterStatus extends Eloquent {
protected $table = 'twitter_statuses';
public function twitterRetweet() {
return $this->hasMany('TwitterRetweet');
}
public function twitterReply() {
return $this->hasMany('TwitterReply');
}
public function twitterUser() {
return $this->belongsTo('TwitterUser');
}
public function projectTwitterStatus() {
return $this->hasMany('ProjectTwitterStatus');
}
}
class TwitterRetweet extends Eloquent {
protected $table = 'twitter_retweets';
public function twitterStatus() {
return $this->belongsTo('TwitterStatus');
}
}
class TwitterReply extends Eloquent {
protected $table = 'twitter_replies';
public function twitterStatus() {
return $this->belongsTo('TwitterStatus');
}
}
I got the count of the twitterStatuses using this:
$twitterStatuses = TwitterStatus::has('projectTwitterStatus')
->groupBy(DB::raw('DATE(datetime)'))
->get(array(DB::raw('COUNT(id) AS tweets'),DB::raw('DATE(datetime) AS date')));
I tried for example this to get the retweet count added but that has no effect (a reference to the model apears in the object -> array().
$twitterStatuses = TwitterStatus::has('projectTwitterStatus')
->with(array('twitterRetweet' => function($query)
{
$query->count();
}))
->groupBy(DB::raw('DATE(datetime)'))
->take(10)
->get(array(DB::raw('COUNT(id) AS tweets'),DB::raw('DATE(datetime) AS date')));
Can anyone point me in the right direction?
Not 100% sure how your intended solution is to be used - Assuming you simply want a count of the number of retweets related to twitterStatus?
$count = $twitterStatus->twitterRetweet()->count();
where $twitterStatus is an already retrieved model - not a collection.
if $twitterStatus is a collection to iterate through you can also eager load the related model using either with() or load()
Then you can iterate through each model in the collection - depends on how you wanted to use the results
Related
there are the following models:
class Page extends Model {
protected $with = ['blocks'];
public function blocks() {
return $this->belongsToMany('\App\Block');
}
}
class Block extends Model {
protected $with = ['fields'];
public function fields() {
return $this->hasMany('\App\Fields');
}
}
class Field extends Model {
protected $with = ['data'];
public function data() {
return $this->hasOne('\App\Data');
}
}
And there is a controller in which I get the data:
public function get() {
$page_id = 1;
$data = Page::find($page_id);
}
The result is the following structure:
Page
- Block 1
- field 1
- Some data
- field 2
- More data
- Block 2
- Field 1
- Other data
The block may belong to multiple pages.
The field belongs to the block.
But the data stored in this field belong to both the field and the page at the same time.
So, I need to pass the variable $page_id to the data() function of the Field model. To get something like this:
public function data() {
return $this->hasOne('\App\Data')->where('page_id', '=', $page_id);
}
Tell me, please, how to do this?
I solved this problem by removing $with from models and selecting the data with this code:
Page::with(['blocks.fields.data'=> function($query) use ($page_id){
$query->where('page_id', $page_id);
}])->find($page_id);
But it's not beautiful. I just want to write Page::find($page_id);
Thanks!
I like force loading relation but in your case maybe this what you looking for :
https://laravel.com/docs/master/eloquent-resources#conditional-relationships
you can do this as the following :
Page::whereHas('blocks.fields.data', function($query) use ($page_id){
$query->where('page_id', $page_id);
})->find($page_id);
I have Post model and related Likes item. I am trying to return the if the related model has a row for authenticated user or not. So the tables look like:
Posts
- id
- body
- etc
Likes
- id
- user_id
- likable_type
- likeable_id
Now I am return Posts eloquent with Posts::get(), however I want to return every model with a parameter inside is_liked which shows if the authenticated user has liked that post or not.
If I use ->with('likes')->where(function($q)) {} approach, it will only return me the Post that user has liked but this is not what I want.
I want every Post object to show if the authenticated user has liked it or not. Such as: Post { id, body, is_liked }
Is there any way of achieving this beside running a for loop? What is the best way to handle such scenario?
Update
class Post extends Model {
protected $appends = ['is_liked'];
public function getIsLikedAttribute() {
return $this->has('likes.user_id', '=', Auth::id())->exists();
}
public function likes() {
return $this->morphOne('App\Like', 'likeable');
}
}
class Like extends Model {
protected $fillable = [
'user_id', 'likeable_id', 'likeable_type'
];
public function likeable() {
return $this->morphTo();
}
}
Writing through this morph works, however, $this->has('likes.user_id' part returns error
Method Illuminate\Database\Query\Builder::user_id does not exist.
You can use am accessor and add that property to the append protected variable:
protected $appends = ['is_liked'];
public function getIsLikedAttribute() {
return $this->likes()->where('user_id', '=', Auth::id())->exists();
}
Now you can also check the accessor like
$post->is_liked // bool
So I have a model called data_storage and another model entity_states
I have to fetch the record from data_storage with entity_states where entity_state has data_storage_id and state_id.
How can I use eloquent to achieve this ?.
Or Ill have to use Query builder and use innerJoin?
Update1
My Actual Query
$this->values['new_leads'] = $data_storages->with('actions','states','sla')->where('wf_id',$wfid)->get();
My data_storage modal
class data_storages extends Model
{
//
protected $fillable = ['layout_id','member_id','company_id','team_id','data','status','wf_id'];
function actions()
{
return $this->hasMany('App\Models\ActionDataMaps', 'data_id', 'id' );
}
function states()
{
return $this->hasOne('App\Models\workflow_states','id','status');
}
function sla()
{
//Here I have to get those row from entity_states model where , data_storage_id and state_id
}
}
Thanks
Here's the more reasonable way to do it:
class DataStorage extends Model {
public states() {
return $this->belongsToMany(State::class,"entity_states");
}
}
class State extends Model {
public storages() {
return $this->belongsToMany(DataStorage::class,"entity_states");
}
}
Then you can eager-load related models via e.g.:
$storage = DataStorage::with("states")->first();
$storage->states->first()->column_in_related_state;
Or via the state:
$state = State::with("storages")->first();
$state->storages->first()->column_in_related_storage;
If there are additional columns in the pivot table entity_states then you can refer to them in the relationship as e.g.:
public states() {
return $this->belongsToMany(State::class)->withPivot("pivot_column");
}
In your model data_storage you can define a property / method entity_states to get them:
class data_storage extends Model
{
public function entity_states()
{
return $this->hasMany('App\entity_states','data_storage_id')->where('state_id ','=',$this->table());
}
}
Then you can access them in an instance by
$entityStatesOfDataStorage = $yourDataStorageInstance->entity_states;
See this link:
https://laravel.com/docs/5.3/eloquent-relationships
for Query Builder you may use this:
DB::table('data_storage')
->join('entity_states','data_storage.data_storage_id','=','entity_states.state_id')
->get();
For your reference Laravel Query Builder
I am trying to grasp the concept of Eloquent ORM by creating a ticketing system at the moment. What I am trying to achieve is:
The tickets with the user who posted the ticket
The feedback belonging to the ticket and the user who entered the
feedback
This is what I have right now:
// TicketController.php
public function index()
{
$tickets = Ticket::with('feedback')->with('user')->orderBy("created_at", "desc")->get();
//dd($tickets);
return View::make('modules.helpdesk.index')->withTickets($tickets);
}
And the following models
// Ticket.php
class Ticket extends Eloquent {
protected $table = 'helpdesk_tickets';
public function feedback()
{
return $this->hasMany('Feedback');
}
public function user()
{
return $this->belongsTo('User');
}
}
// Feedback.php
class Feedback extends Eloquent {
protected $table = 'helpdesk_tickets_feedback';
public function ticket()
{
return $this->belongsTo('Ticket');
}
}
// User.php
class User extends Eloquent {
protected $table = 'users';
public function ticket()
{
return $this->belongsTo('Ticket');
}
}
What I have now is the tickets, their related feedback and user who created the ticket. What I am trying to achieve now is to also get the user who created the feedback.
You need to fix the relation:
// User model
public function tickets()
{
return $this->hasMany('Ticket'); // adjust namespace if needed
}
Next add the relation:
// Feedback model
public function user()
{
return $this->belongsTo('User'); // namespace like above
}
then use eager loading:
// it will execute 4 queries:
// 1st for tickets
// 2nd for feedback
// 3rd for feedbacks' user
// 4th for tickets' user
$tickets = Ticket::with('feedback.user', 'user')->latest()->get();
you can then access the relations in a loop, like below:
#foreach ($tickets as $ticket)
{{ $ticket->title }} by {{ $ticket->user->name }}
#foreach ($ticket->feedback as $feedback)
{{ $feedback->content }}
#endforeach
#endforeach
What you want to do is create nested relations, just like Ticket add a belgonsTo relation on feeback
When you want to use it you can chain relations using the dot notation feedback.user
The code
// Feedback.php
class Feedback extends Eloquent {
protected $table = 'helpdesk_tickets_feedback';
public function ticket()
{
return $this->belongsTo('Ticket');
}
public function user()
{
return $this->belgonsTo('User')
}
}
// TicketController.php
public function index()
{
$tickets = Ticket::with('feedback')->with('user')->with('feedback.user')->orderBy("created_at", "desc")->get();
//dd($tickets);
return View::make('modules.helpdesk.index')->withTickets($tickets);
}
EDIT:
Even though this would work, it will execute more queries than needed. See Jareks answer.
Original Answer:
First of all you need to get your relationships straightened, in User.php you should call the user relationship with HasMany.
public function ticket() {
return $this->hasMany('Ticket');
}
In modules.helpdesk.index you should now have a Ticket Collection since your attaching the $ticket variable to the view.
If you loop through this collection with a foreach loop then what you should get is a model each loop:
foreach($tickets as $ticket) {
// Prints the name property of the Ticket model
print $ticket->name;
// Since a ticket only belongs to ONE user then that means that you are trying to fetch a model
// What we're doing here is getting the User model via the relationship you made in the model Ticket.php and then getting the name.
print $ticket->user()->first()->username;
// Since a ticket can have MANY feedbacks that means were fetching a collection
// which needs to be broken down to models so we do that looping the collection.
// Here we are doing the same thing as with the User model except with a collection.
foreach($ticket->feedback()->get() as $feedback) {
$feedback->text;
}
}
You should definitely check out the Laravel API and see Collection and Model there. http://laravel.com/api/ You get alot of help from there when you get stuck, trust me :)
I hope this answered your question.
Hi i thought i can handle this myself, but actually i don't know how to bite it.
I am trying to categorise my programs. There will be only 2 levels of categories:
1 CATEGORY
2 |-Subcategory
I want it to be as simple as possible.
- program can belong to only one subcategory,
- categories can have many subcategories,
- subcategories can have many programs,
Of course i would like to list all programs from subcategories, when someone choose a main category.
I am also not sure about my current database tables structure and relationship in models.
Tables in database:
programs: id, title, description, program_subcategory_id
programs_categories: id, name
programs_subcategories: id, name, program_category_id
Models:
Program.php
class Program extends Eloquent {
protected $table = 'programs';
public function user()
{
return $this->belongsTo('User');
}
public function subcategory()
{
return $this->belongsTo('ProgramSubcategory', 'program_subcategory_id');
}
}
ProgramCategory.php
class ProgramCategory extends Eloquent {
protected $table = 'programs_categories';
public function subcategories()
{
return $this->hasMany('ProgramSubcategory');
}
}
ProgramSubcategory.php
class ProgramSubcategory extends Eloquent {
protected $table = 'programs_subcategories';
public function programs()
{
return $this->hasMany('Program');
}
public function category()
{
return $this->belongsTo('ProgramCategory');
}
}
Actual controllers:
ProgramsController.php
class ProgramsController extends BaseController {
public function index()
{
$programs = Program::with('subcategory')->orderBy('programs.id', 'desc')->paginate(5);
$acategories = ArticleCategory::All();
$pcategories = ProgramCategory::All();
return View::make('programs.index', compact('programs', 'acategories', 'pcategories'));
}
}
ProgramsSubcatecories.php
class ProgramsSubcategories extends BaseController {
public function index($cname)
{
$programs = ProgramSubcategory::whereAlias($cname)->first()->programs()->orderBy('id', 'DESC')->paginate(10);
$pcategories = ProgramCategory::All();
$scategories = ProgramSubcategory::All();
$acategories = ArticleCategory::All();
return View::make('programs.index', compact('programs', 'pcategories', 'scategories ', 'acategories'));
}
public function show($cname, $id)
{
$category = ProgramSubcategory::whereAlias($cname)->first();
$program = $category->programs()->findOrFail($id);
$pcategories = ProgramCategory::All();
$acategories = ArticleCategory::All();
return View::make('programs.show', compact('program', 'category', 'pcategories', 'scategories ', 'acategories'));
}
}
It is not a problem for me to list all items from one category with eager loading. But i have problem how to do it with 2-levels categories.
Please advise how to start it.
You are not looking for eager loading, you need to solve how to manage hierarchical data in your database.
Nested sets model serves this purpose very well. You should read some theory on Wiki: http://en.wikipedia.org/wiki/Nested_set_model
Fortunately, there are Eloquent implementations already.
To mention some:
- Baum (the best free, imho), https://github.com/etrepat/baum
- Laravel Nested Set, https://github.com/atrauzzi/laravel-nested-set
- Laravel4-nestedset, https://github.com/lazychaser/laravel4-nestedset
and the paid one (surely highest quality as well)
from Cartalyst company - https://cartalyst.com/manual/nested-sets