I am working with four tables in Laravel and trying to display data to a view. I believe I am stuck because one of the tables has a composite primary key.
I have the following in my controller:
public function show($id)
{
//Get application for drug
$application = PharmaApplication::where('ApplNo', $id)->first();
//Return all products for application
$drugs = $application->products;
return view('profiles.drug', compact('drugs'));
}
I have the following in my PharmaApplication model:
public function products()
{
return $this->hasMany('App\PharmaProduct', 'ApplNo', 'ApplNo');
}
I have the following in my view (which I cannot complete)
#foreach ($drugs as $drug)
<li>{{$drug->Strength}}</li>
<li>{{$drug->Form}}</li>
<li>{{$drug->Form}}</li>
#endforeach
I am trying to accomplish the following:
Get the application for a drug - this part of my code works
Return an array of objects for the products (i.e. 7 products that belong to one application). I can do this but get stuck going to the next part.
Next, I have to use the array of objects and search a table with the following columns: MarketingStatusID, ApplNo, ProductNo. I know how to query this table and get one row using DB Query, but then how do I get the proper result to that query within the for loop in my view?
Finally, I use the MarketingStatusID to retrieve the MarketingStatusDescription which I will know how to do.
Related
I am retrieving data from 3 tables account, product and stock. Account and product has one to many relation and product and stock has one to many relation, I am trying to retrieve data using account table, here is my query:
$account=Account::find(1);
$result=$account->product->stock;
echo($result);
I am getting result but problem is that I need some specific columns from stock table and when I write following code I am getting error property does not exist:
$result=$account->product->stock->model;
//in controller first get account data
$account=Account::find(1);
$products=$account->product;
foreach($products as $product){
$productData=$product->stock;
}
//in account model
use App\Product;//model name
function product(){
return $this->hasMany(Product::class, 'account_id');
}
//in product model
use App\Stock //model name
function stock(){
return $this->hasMany(Stock::class, 'product_id');
}
I have two tables related by many to many relation in Laravel Framework. I can display data from each table separately, but not through relation by taking one record from the 1st table and checking related records in the 2nd table. In tinker it accesses data fine.
Relations:
public function underperformances() {
return $this->belongsToMany(Underperformance::Class);
}
...
public function procedures() {
return $this->belongsToMany(Procedure::class);
}
My resource controller part:
...
use App\Underperformance;
use App\Procedure;
...
public function index()
{
$books = Underperformance::orderBy('id','desc')->paginate(9);
$procedures = Procedure::all();
return view('underpcon.underps', compact('books', 'procedures'));
}
Route:
Route::get('/underps', 'UnderpsController#index');
If I try to display data like this:
#foreach($procedures as $procedure)
<li>{{$procedure->underperformances}}</li>
#endforeach
I get such format to the browser:
[{"id":1,"title":"Spare part not taken before service","description":"tekstas","level":"1","costs":600 ...
This is correct data from related table, but I cannot select further the specific column from that table. For example this does not work:
#foreach($procedures as $procedure)
<li>{{$procedure->underperformances->id}}</li>
#endforeach
Nor this one:
#foreach ($procedures->underperformances as $underperformance)
<li>{{$underperformance->id}}</li>
#endforeach
How do I select records of the related table and display specific data from that table?
What would be a conventional way to do this?
#foreach($procedures as $procedure)
<li>{{$procedure->underperformances->id}}</li>
#endforeach
^ This right there $procedure->underperformances will return a collection, not a single item, so you need to treat it as array, you will not be able to access the id directly, you can either #foreach that, or use the pluck method in Laravel Collections.
I'm trying to create a function in our Laravel 5.8 app that would add multiple records to a pivot table. At present we have the following setup;
Users
Training Courses
Users Training Courses (pivot table for the above relationships, with a few extra fields)
I want to be able to show all users in the database, then check their name, pick a training course and hit "Add" and it'll create a record in the pivot table for each user that was selected.
I can't figure out where to start with this - it seems like I need to have a "for each user selected, run the store function" loop in the controller, but I have no idea where to start.
I wasn't sure if there was an easy way to do this in eloquent or not. Is there a simple way to do this?
Eloquent does this automatically if you set up the relationships correctly and you don't have to worry about pivot tables.
class Users
{
public function trainingCourses()
{
return $this->hasMany(TrainingCourses::class);
}
}
class TrainingCourses
{
public function user()
{
return $this->belongsTo(User::class);
}
}
Then you can use the save() method to create the relationship. But I find it better to wrap this function inside a helper method that you can use throughout your code:
class Users
{
...
public function assignTrainingCourse(TrainingCourse $trainingCourse)
{
return $this->trainingCourses()->save($trainingCourse);
}
}
In your code, you could then do something as simple as this:
$user = User::find(1);
$trainingCourse = TrainingCourse::find(1);
$user->assignTrainingCourse($trainingCourse);
Building on this, suppose you have the following route to assign a training course, where it expects a trainingcourse_id in the request:
Route::post('/users/{user}/trainingcourses', 'UserTrainingCoursesController#store');
Thanks to route model binding, Laravel can inference the parent model (user) from the URL, and your controller might look like this:
// UserTrainingCoursesController.php
public function store(User $user)
{
$trainingCourse = TrainingCourse::find(request()->input('trainingcourse_id'));
$user->assignTrainingCourse($trainingCourse);
return back();
}
Of course, you'll want to put some validation in here, but this should get you started.
I have some working queries that are not ideal and I'd like to try perform them the Eloquent way to tidy it up.
I think I've got the relationships defined correctly but I can't figure out how to write the queries and store them in variables in the controller. I need to return these variables back to the view because I json encode them for use in JavaScript.
Here's what I have in my controller:
public function show($idProject)
{
$project = ProjectsModel::with('user')->where('idProjects','=',$idProject)->first();
$objsettings = ObjSettingsModel::where('idObjSettings','=',$project['ObjSettingsID1'])->first();
$obj = ObjModel::where('idObjs','=',$objsettings['Objs_idObjs'])->first();
return view('project')->with('project',$project)->with('obj',$obj)->with('objsettings',$objsettings);
}
The naming conventions are a bit off so here's what this does.
I pass the $idProject to the controller from a link on my index page where I've looped through and paginated all rows from the Projects table.
The first query finds the project row where it's id (idProjects) matches the variable passed from the index page via the link (idProject). I've also successfully pulled the related user row from the user table using an eloquent relationship.
The next query pulls from an ObjSettings table which stores a number of settings values for an object which is shown on the page. I match the idObjSettings column of the ObjSettings table to the previously pulled $project['ObjSettingsID1'] which is essentially the foreign key in the projects table. There can be several ObjSettings for each Project.
The 3rd query pulls from the Obj table which stores details about an object. These are static details on objects such as name or size for example. I match the idObjs column to the previously pulled $objsettings['Objs_idObjs'] which is the foreign key in the ObjSettings table. One Obj can have many ObjSettings which are used in other Projects.
Here's how I'm passing the php variables to JS:
<script>var obj = #json($obj);</script>
<script>var objsettings = #json($objsettings);</script>
Here are my relationships
ProjectsModel
public function user()
{
return $this->belongsTo('App\User', 'Username', 'id');
}
public function objsettings()
{
return $this->hasMany('App\ObjSettingsModel', 'idObjSettings', 'ObjSettingsID1' );
}
ObjSettingsModel
public function objs()
{
return $this->belongsTo('App\ObjsModel', 'Objs_idObjs', 'idObjs');
}
public function projects()
{
return $this->belongsTo('App\ProjectsModel', 'ObjSettingsID1', 'idObjSettings' );
}
ObjModel
public function objsettings()
{
return $this->hasMany('App\ObjSettingsModel', 'idObjs', 'Objs_idObjs');
}
I've tried a whole range of queries such as:
$project = ProjectsModel::with('user')->with('objsettings.objs')->where('idProjects','=',$idProject)->first();
$objsettings = $project->objsettings;
$obj = $project->objsettings->objs;
but I keep running into issues such as "Property [objs] does not exist on this collection instance." I suppose I'm returning multiple rows in this case? Any help would be appreciated.
You need to loop through objsettings
$project = ProjectsModel::with('user')->with('objsettings.objs')->where('idProjects','=',$idProject)->first();
$objsettings = $project->objsettings;
foreach($objsettings as $objsetting){
$objs = $objsetting->objs;
}
How to map data from one table to may other data from other table;
example we have three table region, market, categories, products using eloquent in laravel 5.1
i have tried this but only gives me the last
public function look(Request $request)
{
``$sector_id=$request->input('category');
$cells=Cell::where('sector_id',"=",$sector_id)->get();
foreach ($cells as $cell){
$a=$cell->id;
$markets=Market::where('cell_id',"=",$a)->get();
}
foreach ($markets as $market){
$b=$market->id;
$prices=Price::where('market_id',"=",$b)->get();
}
return view('reports.sector')->with('cells',$cells)->with('markets',$markets)-`>with('prices',$prices);
}
i need to display only the names in above table but what i need is that one elements in each table maps with their corresponding elements from other table how can i do that query.i need all of those data from database please help me i am stuck here.
If you mean three separate tables:
$cells = Cell::where('sector_id', $sector_id)->get();
$markets = Market::whereIn('cell_id', $cells->pluck('id'))->get();
$prices = Price::whereIn('market_id', $markets->pluck('id'))->get();
If you want to display the data in a tree-like structure, and if you have defined your model relations properly you can use eager loading
$cells = Cell::where('sector_id', $sector_id)->with('markets.prices')->get()
Pass cells to the view and you can use the following in your blade template to display the data
#foreach ($cells as $cell)
#foreach ($cell->markets as $market)
#foreach ($market->prices as $price)