Many-to-many (belongsToMany) in Laravel - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to define a many-to-many relationship in a Laravel model.

Laravel

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

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

AhasMany

BbelongsToMany

ChasOne

DbelongsTo

Attempts:

3 left

💡 Hint

Common Mistakes

Using hasMany instead of belongsToMany

Using belongsTo which is for one-to-many or one-to-one

In Laravel, many-to-many relationships are defined using the belongsToMany method.

2fill in blank

medium

Complete the code to attach a role to a user using the many-to-many relationship.

Laravel

$user->roles()->[1]($roleId);

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Adetach

Bsync

Cattach

Dsave

Attempts:

3 left

💡 Hint

Common Mistakes

Using detach which removes the link

Using save which is for saving models

The attach method adds a record to the pivot table linking the two models.

3fill in blank

hard

Fix the error in the code to retrieve all roles of a user.

Laravel

$roles = $user->[1];

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Aroles

Bget_role

Crole

DgetRoles

Attempts:

3 left

💡 Hint

Common Mistakes

Using singular form 'role' instead of 'roles'

Trying to call a method that doesn't exist

The relationship method is named roles, so accessing it as a property returns the collection of roles.

4fill in blank

hard

Fill both blanks to define a many-to-many relationship with a custom pivot table and foreign keys.

Laravel

public function permissions() {
    return $this->[1](Permission::class, '[2]', 'user_id', 'permission_id');
}

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

AbelongsToMany

BhasMany

Crole_user

Dpermission_user

Attempts:

3 left

💡 Hint

Common Mistakes

Using hasMany instead of belongsToMany

Using wrong pivot table name

Use belongsToMany to define the relationship and specify the pivot table name permission_user.

5fill in blank

hard

Fill all three blanks to sync roles for a user, replacing existing links.

Laravel

$user->[1]()->[2]([[3]]);

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

Aroles

Bsync

C1, 2, 3

Dattach

Attempts:

3 left

💡 Hint

Common Mistakes

Using attach instead of sync which adds without removing

Passing a string instead of an array for role IDs

Use the roles relationship, call sync to replace existing roles, and pass an array of role IDs.