func UpdateFeedback(node model.Node, feedback float64) {
db := persistence.GetDatabase().DbMap()
avg := node.LocalFeedbackAverage
fc := node.FeedbackCount
newAvg := computeNewAverage(avg, float64(fc), feedback)
node.LocalFeedbackAverage = newAvg
node.FeedbackCount = fc + 1
db.Update(&node)
}
func FindOrCreateNode(name string, parent model.Node) model.Node {
db := persistence.GetDatabase().DbMap()
node := model.Node{}
db.SelectOne(&node, "select * from nodes where Name=? and ParentId=?", name, parent.Id)
if node.Id == 0 {
node.Name = name
insertAndAssociateNodeToParent(&node, parent)
}
return node
}
func insertAndAssociateNodeToParent(node *model.Node, parent model.Node) {
db := persistence.GetDatabase().DbMap()
node.ParentId = parent.Id
parent.ChildrenCount++
db.Update(&parent)
db.Insert(&node)
}