Creating custom object relationships

Considerations to be observed 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

Note

Each custom object can have up to two master-detail relationships and up to 25 total relationships. Where an object has more than one master-detail relationship, the first master-detail relationship that was created, becomes the primary master-detail relationship. The owner of the record therefore is derived from the first master-detail relationship that was created.

• When planning to create a master-detail relationship on an object, be aware that it can only be created before the object contains record data

Note

Master-detail relationships can be created on an object that contains record data by first creating a lookup relationship field, populating the lookup field...