29 lines
816 B
ReStructuredText
29 lines
816 B
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.. _topics-notification:
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=====================
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Sending notifications
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=====================
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Tryton embeds a bus system allowing the system to send text messages to clients
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logged in the system.
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It allows the server to warn quickly the client user about some events using
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the :meth:`trytond.bus.notify` function. Sending the notifications is done in a
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transactional way and will occur at then end of the transaction.
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For example, we warn the user of low stock level when selecting a product::
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from trytond.bus import notify
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class SaleLine:
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__name__ = 'sale.line'
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def on_change_product(self):
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super().on_change_product()
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# compute the product current stock
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stock = …
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if stock < 0:
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notify('Not enough stock', priority=3)
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