Difference between Has One, Has Many, BelongsToMany

One to one(hasOne) relationship: A user has(can have) one profile. So, A profile belongs to one user.

belongsToMany vs hasMany · Issue #55 · pipe-dream/laravel-create · GitHub

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User belongs to many roles? : r/laravel

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many to many - Laravel Relationship : retrieve product that belongs to user cart from transaction - Stack Overflow

Difference between Has One, Has Many, BelongsToMany

Laravel BelongsTo and BelongsToMany with Same Table: Possible? Worth it? – Quick Admin Panel

The latestOfMany() method lets you use a 'hasMany' relation as a 'hasOne' relation, returning the latest record

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Saving with relations (hasOne, hasMany)