Creating columns with editable cells in Gtk treeview using Glade

For anyone dealing with a similar problem, I have solved it - whenever a cell is edited, appropriate record in the model needs to be changed, example code in Python:

cell.connect("edited", self.text_edited, model, column)

def text_edited( self, w, row, new_text, model, column)
  model[row][column] = new_text