One-to-one (hasOne, belongsTo) in Laravel - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to define a one-to-one relationship in the User model using hasOne.

Laravel

public function profile() {
    return $this->[1](Profile::class);
}

Drag options to blanks, or click blank then click option'

AhasMany

BbelongsTo

ChasOne

DbelongsToMany

Attempts:

3 left

💡 Hint

Common Mistakes

Using belongsTo instead of hasOne here.

Confusing hasOne with hasMany.

The hasOne method defines a one-to-one relationship where the current model owns the related model.

2fill in blank

medium

Complete the code to define the inverse one-to-one relationship in the Profile model using belongsTo.

Laravel

public function user() {
    return $this->[1](User::class);
}

Drag options to blanks, or click blank then click option'

AbelongsTo

BhasOne

ChasMany

DbelongsToMany

Attempts:

3 left

💡 Hint

Common Mistakes

Using hasOne instead of belongsTo here.

Mixing up which model holds the foreign key.

The belongsTo method defines the inverse of a one-to-one or one-to-many relationship, pointing back to the owning model.

3fill in blank

hard

Fix the error in this User model relationship method to correctly define a one-to-one relation.

Laravel

public function profile() {
    return $this->[1](Profile::class)->withTimestamps();
}

Drag options to blanks, or click blank then click option'

AhasOne

BbelongsTo

ChasMany

DbelongsToMany

Attempts:

3 left

💡 Hint

Common Mistakes

Using belongsTo instead of hasOne.

Trying to use hasMany for one-to-one.

The hasOne method is correct for one-to-one ownership. The withTimestamps() method is not valid here and should be removed, but the blank focuses on the relationship method.

4fill in blank

hard

Fill both blanks to define a one-to-one relationship with a custom foreign key and local key.

Laravel

public function passport() {
    return $this->[1](Passport::class, '[2]', 'id');
}

Drag options to blanks, or click blank then click option'

AhasOne

BbelongsTo

Cuser_id

Dpassport_id

Attempts:

3 left

💡 Hint

Common Mistakes

Using belongsTo instead of hasOne here.

Using the wrong foreign key name.

Use hasOne to define the relationship. The foreign key on the Passport model is usually user_id.

5fill in blank

hard

Fill all three blanks to define the inverse one-to-one relationship with custom keys.

Laravel

public function user() {
    return $this->[1](User::class, '[2]', '[3]');
}

Drag options to blanks, or click blank then click option'

AbelongsTo

Bpassport_id

Cid

Duser_id

Attempts:

3 left

💡 Hint

Common Mistakes

Using hasOne instead of belongsTo here.

Mixing up foreign key and owner key names.

The belongsTo method defines the inverse relation. The foreign key on this model is user_id, and the owner's key is id.