32 lines
778 B
ReStructuredText
32 lines
778 B
ReStructuredText
.. _topics-fields_default_value:
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=======================
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Default value of fields
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=======================
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When a record is created, each field, which doesn't have a value specified,
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is set with the default value if exists.
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The following class method::
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Model.default_<field name>()
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Return the default value for ``field name``.
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This example defines an ``Item`` model which has a default ``since``::
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import datetime
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from trytond.model import ModelView, ModelSQL, fields
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class Item(ModelSQL, ModelView):
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"Item"
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__name__ = 'item'
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since = fields.Date('since')
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@classmethod
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def default_since(cls):
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return datetime.date.today()
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See also method ``Model.default_get``: :attr:`~trytond.model.Model.default_get`
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