Single Table is usually the best choice. On 2015-04-24, 9:30 AM, "HOUNKPONOU Ronald" wrote:
Hi Chuck, I am using horizontal inheritance. I've choose it after i read the section on inheritance in Practical WebObjects. But i read it again may be i miss something 2015-04-24 17:26 GMT+01:00 Chuck Hill <[email protected]<mailto:[email protected]>>: It sounds like you used Vertical Inheritance. I generally don't recommend it. One reason is that you can't enforce foreign key constraints like this. I suggest reading the section on inheritance in Practical WebObjects Chuck On 2015-04-24, 9:22 AM, "HOUNKPONOU Ronald" wrote: Hi, have a problem with Entities and inherance. I have 3 Entities AbstractPerson, Person and Account. AbstractPerson is abstract. Person inherit from AbstractPerson. An AbstractPerson can have many Accounts. I can esaly create a Person. The problem is that when I try to insert an Account that belongs to a Person, i got this ERROR : ERROR: an insert or update instruction on the « Account » violate the foreign key constraint « account_abstractperson_fk » Details: The key (abstractpersonid)=(1) is not present in the table « abstractperson ».
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