recordcreation.js

// Model definition code

Essaissprout.A = SC.Record.extend({
  aProp: SC.Record.attr(String),
  bLink: SC.Record.toOne('Essaissprout.B', {inverse: 'aLink'})
});

Essaissprout.B = SC.Record.extend({
  bProp: SC.Record.attr(String),
  aLink: SC.Record.toMany('Essaissprout.A', {inverse: 'bLink'})
});

// Test code I run into Firefox

ES = Essaissprout;

dataHash = {bProp: "Hello I'm B", aLink: []};
tmpId = SC.guidFor(dataHash);
bRecord = ES.store.createRecord(ES.B, dataHash, tmpId);
ES.store.commitRecord(ES.B, null, bRecord.get('storeKey'));
dataHash = {aProp: "Hello I'm A", bLink: bRecord};
tmpId = SC.guidFor(dataHash);
aRecord = ES.store.createRecord(ES.A, dataHash, tmpId);
ES.store.commitRecord(ES.A, null, aRecord.get('storeKey'));

// After that, if I check what is in bRecord, the attribute "aLink" is still empty ...