To create a new one-to-many relationship, you edit your solution, select the entity, click on the Relationships tab, click on + New relationship, and, from the drop-down list, select One-to-many, as shown in the following screenshot:
A pane will open on the right-hand side, as shown in the following screenshot:
The current entity is shown as the One end of the relationship. When creating a relationship, specify the following fields:
- Related (Many): The entity you wish to create the relationship to.
- Lookup field display name: This will default to the name of the current entity.
- Lookup field name: This is the internal name used for the lookup field. It will have the publisher's prefix.
To create the relationship, click on Done.