After creating new custom BO and its Odata service, now I want to do some checking before create new BO in Odata.
If A already exists in system(check field A, field B and field C), I will update it and otherwise I will create new BO.
With Post method, system always create new item I don't know how to check exist to update it
With Put method, it required to pass ObjectID to update that record but ObjectID is generated by Odata, I don't want external system to store it.
Could you please give me your advice? Thanks a lot for your help!