I am trying to use a table for my Users and separate table for users' Projects in my database. However I want the names of the fields to be different for user id. What I want to take the id from the 'Users' table; and while saving the created project to the database, use that (user) id as created_by_id in Projects table.
public function store(CreateProjectRequest $request)
{
$project = new Project($request->all());
Auth::user()->projects()->save($project);
// Project::create($request->all());
return redirect('pages/home');
}
Also in Users.php, I added:
public function projects()
{
return $this->hasMany('App\Project');
}
The commented field is working on its own. However, I guess my problem arises because when I comment that line again, and add the other two lines ($project... and Auth::user... bits), I guess it is assuming I have a field in the Projects table named id.
I thought I would work around this problem with changing the primary key but I couldn't find how to take the Auth::user()->id; and make it write that value in created_by_id in a secure way. This is what I found though:
class Project extends Eloquent {
protected $primaryKey = 'created_by_id';
}
Edit: I don't think changing the primary key is my solution.
You can pass a second and third parameter to hasMany() method to specify the keys to use. Documentation
public function projects()
{
return $this->hasMany('App\Article','userid','created_by');
}
Related
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;
}
I have a following table structure in my existing database :
tbl_Grzyby (ID, Nazwa, ...) - main table,
tblk_TypGrzyba (ID, TypGrzyba, OrderNo) - lookup table,
tblm_TypGrzyba (ID_Grzyb, ID_TypGrzyba) (many-to-many table).
I've created a grzyby Eloquent model class, which has a custom property, defined as:
class grzyby extends Model
{
protected $table = 'tbl_Grzyby';
public function typ_grzyba() {
return $this->belongsToMany('\App\Lookups\typ_grzyba', 'tblm_TypGrzyba','ID_Grzyb', 'ID_TypGrzyba');
}
}
I've also created the lookup table model, defined as:
class typ_grzyba extends Model {
protected $table = 'tblk_TypGrzyba';
public function grzyby() {
return $this->belongsToMany('\App\grzyby', 'tblm_TypGrzyba','ID_Grzyb', 'ID_TypGrzyba');
}
}
When I try with tinker to get record from main with ID=67, like:
$main_record=\App\grzyby::where('ID',67)->first();
it returns me all the details for that record fine. Returning all lookups runs also fine:
$types = \App\Lookups\typ_grzyba::all();
However, if I try to do the following:
$main_record_types = $main_record->typ_grzyba;
tinker returns me an empty collection, despite record existing in the many to many table:
When I run the query log it outputs me following SQL query:
select `tblk_TypGrzyba`.*, `tblm_TypGrzyba`.`ID_Grzyb` as `pivot_ID_Grzyb`, `tblm_TypGrzyba`.`ID_TypGrzyba` as `pivot_ID_TypGrzyba` from `tblk_TypGrzyba` inner join `tblm_TypGrzyba` on `tblk_TypGrzyba`.`id` = `tblm_TypGrzyba`.`ID_TypGrzyba` where `tblm_TypGrzyba`.`ID_Grzyb` is null
If I run that query against the database it returns me empty result, however, if I change the where clause manually to
where `tblm_TypGrzyba`.`ID_Grzyb` = 67
I'm getting the expected results in phpMyAdmin.
What's the reason of it and how I can fix that?
The solution was to add the primaryKey overrride because I was using uppercase for the ID field and then restart tinker.
You mixed up your foreign key defintion in your relationships. You wrote this twice:
return $this->belongsToMany('\App\grzyby', 'tblm_TypGrzyba','ID_Grzyb', 'ID_TypGrzyba');
I assume copy pasting? in the second model, justt swap the foreign key. Foreign key of the current model comes first.
In typ_grzyba model, do
public function grzyby() {
return $this->belongsToMany('\App\grzyby', 'tblm_TypGrzyba', 'ID_TypGrzyba', 'ID_Grzyb');
}
I've got a situation in a project where I need to form a relationship between a primary key on one table and an indexed column (not the primary key) on another. Here's a sample of the database layout:
courses table
id
level
resources table
id
courses_resources table
course_level
resource_id
In my CourseResource model I have the following:
public function courses(){
return $this->belongsToMany('Course', 'courses_resources', 'resource_id', 'course_level');
}
Which works fine.
Then in my Course model I have:
public function resources(){
return $this->belongsToMany('CourseResource', 'course_resources', 'course_level', 'resource_id');
}
Which doesn't work. When I look at the last query performed on the database, it appears Laravel is searching the course_level column using the course's ID. That makes sense, but is there any way to use the level column for this relationship?
Eloquent BelongsToMany depends on PKs, so there is no way to do that with its methods.
You need custom relation object for this, that will check for given field, instead of primary key.
A quick and hacky solution would be this:
// Course model
public function getKey()
{
$relation = array_get(debug_backtrace(1, 2), '1.object', null);
if (method_exists($relation, 'getForeignKey')
&& $relation->getForeignKey() == 'courses_resources.course_level')
{
return $this->getAttribute('level');
}
return parent::getKey();
}
However if you would like to use it in production, do some extensive testing first.
I have a table 'sits' and it has user_id and sitter_id columns.
Inside of my User model, I have the following functions that all work perfectly and return almost everything I need.
public function mySits()
{
return $this->hasMany('Sit', 'sitter_id');
}
public function openSits()
{
return $this->hasMany('Sit')->where('sitter_id', '=', '0');
}
They work perfectly and returns almost everything I need. I say almost because what I need to do is reference the users table to get the name of the Sitter.
In the sits table, the sitter_id maps to id in the users table which has a name field.
Can I add something to the return data in the User model methods, or would I need do something in my controller.
$user = User::find(1)->load('mySits', 'openSits');
Just create a User relationship inside your Sit model. Then access it via $sit->user->name or similar.