Polymorphic relationships in Laravel - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to define a polymorphic relation method in a Laravel model.

Laravel

public function image() {
    return $this->[1]('imageable');
}

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

AbelongsTo

BhasMany

CmorphTo

DhasOne

Attempts:

3 left

💡 Hint

Common Mistakes

Using hasMany or belongsTo instead of morphTo causes errors.

Forgetting to pass the relation name 'imageable' to the method.

In Laravel, the morphTo method defines the inverse of a polymorphic relation.

2fill in blank

medium

Complete the code to define a polymorphic relation in the Image model.

Laravel

public function imageable() {
    return $this->[1]();
}

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

AhasOne

BbelongsTo

ChasMany

DmorphTo

Attempts:

3 left

💡 Hint

Common Mistakes

Using belongsTo instead of morphTo breaks the polymorphic relation.

Adding parameters to morphTo in the child model is unnecessary.

The morphTo method is used in the polymorphic child model to access the parent model.

3fill in blank

hard

Fix the error in the polymorphic relation definition in the Post model.

Laravel

public function comments() {
    return $this->[1]('commentable');
}

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

AmorphMany

BhasMany

CbelongsToMany

DmorphTo

Attempts:

3 left

💡 Hint

Common Mistakes

Using hasMany instead of morphMany breaks polymorphic behavior.

Using morphTo is incorrect in the parent model for one-to-many.

Use morphMany in the parent model to define a polymorphic one-to-many relation.

4fill in blank

hard

Fill both blanks to complete the polymorphic relation in the Video model.

Laravel

public function tags() {
    return $this->[1]('taggable');
}

public function taggable() {
    return $this->[2]();
}

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

AmorphToMany

BbelongsToMany

CmorphTo

DhasMany

Attempts:

3 left

💡 Hint

Common Mistakes

Using belongsToMany instead of morphToMany breaks polymorphic many-to-many.

Using hasMany instead of morphToMany is incorrect for many-to-many polymorphic.

The morphToMany method defines a polymorphic many-to-many relation in the parent model, while morphTo accesses the parent in the related model.

5fill in blank

hard

Fill all three blanks to complete the polymorphic relation and query in Laravel.

Laravel

$comments = Comment::where('[1]_id', $post->id)
    ->where('[2]_type', get_class($post))
    ->get();

$post->[3]()->save(new Comment(['body' => 'Nice post!']));

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

Acommentable

Ccomments

Attempts:

3 left

💡 Hint

Common Mistakes

Using wrong column names breaks the query.

Using singular relation method name instead of plural causes errors.

Polymorphic relations use commentable_id and commentable_type columns to query related models. The relation method comments is used to save new comments.