A hasOne relationship is a "one-to-one" relationship. For instance, a User entity might have an UserProfile entity attached to it.

// User.cfc
component extends="quick.models.BaseEntity" {

    function profile() {
       return hasOne( "UserProfile" );


The first value passed to hasOne is a WireBox mapping to the related entity.

Quick determines the foreign key of the relationship based on the entity name and key values. In this case, the UserProfile entity is assumed to have a userId foreign key. You can override this by passing a foreign key in as the second argument:

return hasOne("UserProfile", "FK_userID");

If your parent entity does not use id as its primary key, or you wish to join the child entity to a different column, you may pass a third argument to the belongsTo method specifying your parent table's custom key.

return belongsTo("UserProfile", "FK_userID", "profile_id");

The inverse of hasOne is belongsTo. It is important to choose the right relationship for your database structure. hasOne assumes that the related model has the foreign key for the relationship.

// UserProfile.cfc
component extends="quick.models.BaseEntity" {

    function user() {
        return belongsTo( "User" );


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