Saving a reference through belongsTo

I'm making a script using some already created (not by me) domain classes from grails.

开发者_如何转开发

class Person extends OAP {
  static hasMany = [addresses: Address]
(...)
}

class Address {
  static belongsTo = [oap: OAP]
(...)
}

class OAP has no reference to Address.

So I was trying to do:

p.save()
a.oap = p
println a.oap
a.save()

with p being Person and a being Address, but although it prints the correct person on the console, the reference is not saved on the address table (oap_id stays null)

P.S.: It may not be the best relationship set-up in grails, but that's what I have to work with

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Try p.addToAddresses(a) and then p.save(). It should save both p and a. See http://grails.org/doc/latest/guide/5.%20Object%20Relational%20Mapping%20%28GORM%29.html#5.2.4%20Sets,%20Lists%20and%20Maps

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I have no idea how GORM will behave in this situation because you have essentially entered into this weird zone where you have a unidirectional hasMany on Person which results in a SAVE-UPDATE cascade behavior from Person and a NONE on Address. Then you also have a unidirectional one-to-one between Person and OAP which results in an ALL cascade behavior on the OAP side, and a NONE on the Address side. So I'm not sure what to even expect here. You need to fix the relationship to either:

• Make it so OAP and not Person hasMany = [address:Address]
• Make it so Address belongsTo = [person:Person]

Or, give some additional explanation as to what you're trying to do in your relationship and we can go from there.

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Please try with this, it resolved my problem

p.addToAddresses(a);
p.save(flush:true)