## how to fix relationship error between models?

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I have set up two models and made the relationship between them. I want to pass the attributes of the user as well as the user_detail.

I have used a similar code somewhere and it worked perfectly. But it is not working here.

//This is the function in "User.php" model.
public function user_detail(){
return $this->hasOne('App\Profile'); } //This is the function in "Profile.php" model. public function user(){ return$this->belongsTo('App\User');
}

//edit function in ProfileController
public function edit($id) {$user=User::find($id); return view('profile.edit')->with('data',$user->user_detail);
}


When I click the edit button in the view, I expect the extract all the details from user table as well as from user_detail table.

I think you should edit your this code a little bit

public function edit($id) {$user=User::findOrFail($id); return view('profile.edit')->with('data',$user);
}


And in your blade file (profile.edit), You can get all details from User and Profile Model.

{{ $data->id }} {{$data->user_detail->YOURPARAMETERS }}


Overfitting Regression Models: Problems, Detection, and Avoidance , In this post, I explain how overfitting models is a problem and how you can identify The green line represents the true relationship between the variables. The random error inherent in the data causes the data points to fall randomly around  Multivariable linear model. Multivariable model looks exactly like the simple linear model, only this time β, η t, x t and x* t are k×1 vectors. {= + ′ ∗ +, = ∗ +.The general identifiability condition for this model remains an open question.

The problem is with the relationship naming. Make it camelCase like,

//This is the function in "User.php" model.
public function userDetail(){
return $this->hasOne('App\Profile'); } //edit function in ProfileController public function edit($id)
{
$user=User::find($id);
return view('profile.edit')->with('data',$user->userDetail); }  3.3 Relationship between variables: linear models and correlation , 3.3 Relationship between variables: linear models and correlation Y values, there will be some error associated with each prediction when we compare it to the original We can also think of this problem from more a statistical point of view. If you create a scatter plot of values for x and y and see that there is not a linear relationship between the two variables, then you have a couple options: 1. Apply a nonlinear transformation to the independent and/or dependent variable. try using where instead of find and then use with: $user = User::where('id', $id)->with('user_detail')->first(); return view('profile.edit')->with('data',$user);


public function user_detail(){