25 lines
864 B
Python
25 lines
864 B
Python
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from django.db.models import DecimalField, DurationField, Func
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class IntervalToSeconds(Func):
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function = ''
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template = """
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EXTRACT(day from %(expressions)s) * 86400 +
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EXTRACT(hour from %(expressions)s) * 3600 +
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EXTRACT(minute from %(expressions)s) * 60 +
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EXTRACT(second from %(expressions)s)
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"""
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def __init__(self, expression, **extra):
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output_field = extra.pop('output_field', DecimalField())
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super(IntervalToSeconds, self).__init__(expression, output_field=output_field, **extra)
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class SecondsToInterval(Func):
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function = 'NUMTODSINTERVAL'
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template = "%(function)s(%(expressions)s, 'SECOND')"
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def __init__(self, expression, **extra):
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output_field = extra.pop('output_field', DurationField())
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super(SecondsToInterval, self).__init__(expression, output_field=output_field, **extra)
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