Hi! I have written simple code for a model with no associations or validations. If I create a store now, which has summary grouping feature and a memory proxy I get an error while adding a new model instance to my store. He throws :
me.summaryGroups[index - 1] is undefined
in GroupingSummary.js at printData function. Does anyone know what causes this problem ? It is just simple configuration of model and store. Any suggestions?