Graph and pivot views

Graph views provide a graphical view of the data, in the form of a chart. The current fields available in the To-Do Tasks are not good candidates for a chart, so we will add one to use on such a view.

In the TodoTask class, at the todo_stage/models/todo_task_model.py file, add:

effort_estimate = fields.Integer('Effort Estimate') 

It also needs to be added to the To-Do Task form, so that we can add values for it on the existing records and are able to check this new view.

Now let's add the To-Do Tasks graph view:

<record id="view_graph_todo_task" model="ir.ui.view"> 
  <field name="model">todo.task</field> 
  <field name="arch" type="xml"> 
    <graph type="bar"> 
      <field name="stage_id" /> 
      <field name="effort_estimate" type="measure" /> 
    </graph> 
  </field> 
</record> 

The graph view element can have a type attribute that can be set to bar (the default), pie, or line. In the case of bar, the additional...