Associated Python functions

For a BASIC element, the associated Python function (having the same id) will return the content of the element.

For field elements (TEXT, NUMBER, DATETIME), the associated Python function will return its default value.

For an ACTION element, the associated Python function will be executed when the action is triggered.

Special Python functions

on_save

Executed when a record is saved with the block. If it returns a value, it must be a string, and it will be used as a redirection URL for the current request.

on_display

Executed when a block is displayed. It will be executed before all the element functions. It can be used to do some computation and put the result in the context so it can be accessed by the different elements. It can also be used to redirect to another page (using context.request.response.redirect()).

on_delete

Executed when a record is deleted. If it returns a value, it must be a string, and it will be used as a redirection URL for the current request.

record_id

Executed at creation time to compute the record id.