nhibernate - Ruling out NHiberate mappings causing deletion of entity -

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i have nhibernate issue update entity , causes deletion of entity. set of entities , related mappings large replicate here wanted create sample data in order discuss issue. in cut out example imagine updating d results in deletion of a.

q: fair impossible mapping issue given mapping files related a ie (bmappingfile & cmappingfile) have mapping a set .cascade.none() or there other nhib config/mapping related setting should aware of achieve behaviour?

db tables

a

aid | aname

b

bid | bname | aid

c

cid | cname | aid

d

did | dname | cid

and set of corresponding mapping files along lines of

amappingfile

public amap() {     table("[dbo].[a]");     lazyload();     cache.readwrite().includeall();      id(x=>x.aid)     .access.camelcasefield(prefix.underscore)     .column("[aid]")     .generatedby.identity();  hasmany(x=>x.bs)     .access.camelcasefield(prefix.underscore)     .cascade.alldeleteorphan()     .fetch.select()     .inverse()     .lazyload()     .keycolumns.add("[aid]")     .cache.readwrite().includeall();  hasmany(x=>x.cs)     .access.camelcasefield(prefix.underscore)     .cascade.alldeleteorphan()     .fetch.select()     .inverse()     .lazyload()     .keycolumns.add("[aid]")     .cache.readwrite().includeall();      ... }

bmappingfile

public bmap() {     table("[dbo].[b]");     lazyload();     cache.readwrite().includeall();      id(x=>x.bid)     .access.camelcasefield(prefix.underscore)     .column("[bid]")     .generatedby.identity();      references(x=>x.a)     .access.camelcasefield(prefix.underscore)     .cascade.none()     .fetch.select()     .columns("[aid]");      ... }

cmappingfile

public cmap() {     table("[dbo].[c]");     lazyload();     cache.readwrite().includeall();      id(x=>x.cid)     .access.camelcasefield(prefix.underscore)     .column("[cid]")     .generatedby.identity();      references(x=>x.a)     .access.camelcasefield(prefix.underscore)     .cascade.none()     .fetch.select()     .columns("[aid]");  hasmany(x=>x.ds)     .access.camelcasefield(prefix.underscore)     .cascade.alldeleteorphan()     .fetch.select()     .inverse()     .lazyload()     .keycolumns.add("[did]")     .cache.readwrite().includeall();      ... }

dmappingfile

public dmap() {     table("[dbo].[d]");     lazyload();     cache.readwrite().includeall();      id(x=>x.did)     .access.camelcasefield(prefix.underscore)     .column("[did]")     .generatedby.identity();      references(x=>x.c)     .access.camelcasefield(prefix.underscore)     .cascade.none()     .fetch.select()     .columns("[cid]");      ... }

you should provide snippet of code or queries question.

i have nhibernate issue update entity , causes deletion of entity

suppose persisted a-entity instance collection of 5 b. once update instance of a using empty collection of bs bs removed.


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