c# - Not able to delete the foreign key contraint in Nhibernate Mappings - 


public class reviewmap : classmapbase<review>     {         public reviewmap()         {             table("reviews");              list(x => x.objectives, m =>             {                 m.table("objectives");                 m.cascade(cascade.all.include(cascade.deleteorphans));                 m.key(k => k.column("reviewid"));                 m.where("deletiondate null");                 m.orderby("orderno");                 m.index(x => x.column("orderno"));                 m.inverse(true);             }, m => m.onetomany());         }   public class objectivemap : classmapbase<objective>     {         public objectivemap()         {             table("objectives");              // use "soft deletes" allow capture results against deleted items             where("deletiondate null");             sqldelete("update objectives set deletiondate = getutcdate(), orderno = 1 id=?");              manytoone(x => x.review, m =>             {                 m.column("reviewid");                 m.notnullable(true);             });              property(x => x.details, m =>             {                 m.notnullable(true);                 m.length(1000);                 m.column("details");             });              property("orderno", m =>             {                 m.notnullable(false);             });          }     }

when try delete reviews gives me error foreign key constraint in objective table. reviewid foreign key in objectives table.

can suggest problem ?

you prevent deletions in objectives table custom sql-delete require objectives have reference review row. how should work? require reviews never deleted.

a way can work if remove foreign key constraint on objectives.reviewid column, wouldn't recommend that. since id of deleted review row won't history purposes, better way make objectives.reviewid column nullable , null out in custom sql-delete.


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