Creating custom object relationships

Considerations to be made when creating object relationships are as follows:

• Create the object relationships as a first step before starting to build the custom fields, page layouts, and any related list
• The Related To entry cannot be modified after you have saved the object relationship

You can create a maximum of two master-detail relationships and up to 40 total relationships on each.

Where an object has more than one master-detail relationship, the first master-detail relationship that was created becomes the primary master-detail relationship field. The ownership via the sharing settings of the record is therefore derived from the first master-detail relationship that was created.

• When planning the creation of a new master-detail relationship field on a custom object, be aware that it can only be created before the object contains...