Wizard

A wizard is a finite state machine.

There is also a more practical introduction into wizards.

class trytond.wizard.Wizard(session_id)

This is the base for any wizard. It contains the engine for the finite state machine. A wizard must have some State instance attributes that the engine will use.

Class attributes are:

Wizard.__name__

It contains the unique name to reference the wizard throughout the platform.

Wizard.start_state

It contains the name of the starting state.

Wizard.end_state

It contains the name of the ending state. If an instance method with this name exists on the wizard, it will be called on deletion of the wizard and it may return one of the client side action keywords.

Wizard.__rpc__

Same as trytond.model.Model.__rpc__.

Wizard.states

It contains a dictionary with state name as key and State as value.

Class methods are:

classmethod Wizard.__setup__()

Setup the class before adding into the trytond.pool.Pool.

classmethod Wizard.__post_setup__()

Setup the class after added into the trytond.pool.Pool.

classmethod Wizard.__register__(module_name)

Register the wizard.

classmethod Wizard.create()

Create a session for the wizard and returns a tuple containing the session id, the starting and ending state.

classmethod Wizard.delete(session_id)

Delete the session.

classmethod Wizard.execute(session_id, data, state_name)

Execute the wizard for the state. session_id is a session id. data is a dictionary with the session data to update. active_id, active_ids, active_model and action_id must be set in the context according to the records on which the wizard is run.

State

class trytond.wizard.State

This is the base for any wizard state.

Instance attributes are:

State.name

The name of the state.

StateView

class trytond.wizard.StateView(model_name, view, buttons)

A StateView is a state that will display a form in the client. The form is defined by the ModelView with the name model_name, the XML id in view and the buttons.

Instance attributes are:

StateView.model_name

The name of the ModelView.

StateView.view

The XML id of the form view.

StateView.buttons

The list of Button instances to display on the form.

Instance methods are:

StateView.get_view()

Returns the view definition like fields_view_get().

StateView.get_defaults(wizard, state_name, fields)

Return default values for the fields.

  • wizard is a Wizard instance
  • state_name is the name of the State
  • fields is the list of field names
StateView.get_buttons(wizard, state_name)

Returns button definitions of the wizard.

  • wizard is a Wizard instance
  • state_name is the name of the StateView instance

StateTransition

class trytond.wizard.StateTransition

A StateTransition brings the wizard to the state returned by the method having the same name as the state but starting with transition_.

StateAction

class trytond.wizard.StateAction(action_id)

A StateAction is a StateTransition which let the client launch an ir.action. This action definition can be customized with a method on wizard having the same name as the state but starting with do_.

Instance attributes are:

StateAction.action_id

The XML id of the ir.action.

Instance methods are:

StateAction.get_action()

Returns the ir.action definition.

Button

class trytond.wizard.Button(string, state[, icon[, default]])

A Button is a single object containing the definition of a wizard button.

Instance attributes are:

Button.string

The label display on the button.

Button.state

The next state to reach if button is clicked.

Button.icon

The name of the icon to display on the button.

Button.default

A boolean to set it as default on the form.