system of change

Gives the change full access, with the reason.

Value

Text that says why the change needs every row: it is read by whoever reads the code, and tent access shows it. Left out, the change writes as its caller.

Full access means that the rules of the tables do not hold: the change reaches every row, whatever access of a table says. How it is used depends on how the change is written:

• Written in our own words, with set, the whole plan or write is carried out with full access.
• Written with run, full access is db.system, and db beside it stays limited to the caller. So one run reads what the caller may see through db, and what it must see beyond that through db.system.

db.system in a change that states no system is code.T3004. The rule of the change itself, its access, holds either way: it says who may call, and system only what the call may reach.

Example

export const closeDay = change('closeDay', {
  access: role('staff'),
  system: 'closes the orders of every customer',
  input: { order: link('orders') },
  set: orders.change(input('order'), { status: 'closed' }),
})

See also

word.change, topic.db, code.T3004