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 I am building a task manager application and among other I have these tables:   TaskTypes : [id, name, instructions]   TaskElements : [id, name, description, task_type_id, element_category_id]   ElementCategories : [id, name]   In the TaskTypes  view.cpt  I want to create a button which will open a new screen where the user can select an Element Category  from a drop down menu and then will see a table with all the TaskElements  that belong to this Element Category . Each row (Task Element) will have a checkbox, so the user can select Task Elements  and then with a Submit  button the selected Task Elements  will be duplicated with the task_type_id  filled from the TaskTypes view.cpt .   Because I am fairly new to cakephp I have these questions:   How I can write the code to update the table based on the dropdown ...