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  • 문서 버전: 2.2

Source code for django.db.models.functions.math

import math

from django.db.models.expressions import Func
from django.db.models.fields import FloatField, IntegerField
from django.db.models.functions import Cast
from django.db.models.functions.mixins import (
    FixDecimalInputMixin, NumericOutputFieldMixin,
)
from django.db.models.lookups import Transform


[문서]class Abs(Transform): function = 'ABS' lookup_name = 'abs'
[문서]class ACos(NumericOutputFieldMixin, Transform): function = 'ACOS' lookup_name = 'acos'
[문서]class ASin(NumericOutputFieldMixin, Transform): function = 'ASIN' lookup_name = 'asin'
[문서]class ATan(NumericOutputFieldMixin, Transform): function = 'ATAN' lookup_name = 'atan'
[문서]class ATan2(NumericOutputFieldMixin, Func): function = 'ATAN2' arity = 2 def as_sqlite(self, compiler, connection, **extra_context): if not getattr(connection.ops, 'spatialite', False) or not ( (4, 3, 0) <= connection.ops.spatial_version < (5, 0, 0) ): return self.as_sql(compiler, connection) # This function is usually ATan2(y, x), returning the inverse tangent # of y / x, but it's ATan2(x, y) on SpatiaLite >= 4.3.0, < 5.0.0. # Cast integers to float to avoid inconsistent/buggy behavior if the # arguments are mixed between integer and float or decimal. # https://www.gaia-gis.it/fossil/libspatialite/tktview?name=0f72cca3a2 clone = self.copy() clone.set_source_expressions([ Cast(expression, FloatField()) if isinstance(expression.output_field, IntegerField) else expression for expression in self.get_source_expressions()[::-1] ]) return clone.as_sql(compiler, connection, **extra_context)
[문서]class Ceil(Transform): function = 'CEILING' lookup_name = 'ceil' def as_oracle(self, compiler, connection, **extra_context): return super().as_sql(compiler, connection, function='CEIL', **extra_context)
[문서]class Cos(NumericOutputFieldMixin, Transform): function = 'COS' lookup_name = 'cos'
[문서]class Cot(NumericOutputFieldMixin, Transform): function = 'COT' lookup_name = 'cot' def as_oracle(self, compiler, connection, **extra_context): return super().as_sql(compiler, connection, template='(1 / TAN(%(expressions)s))', **extra_context)
[문서]class Degrees(NumericOutputFieldMixin, Transform): function = 'DEGREES' lookup_name = 'degrees' def as_oracle(self, compiler, connection, **extra_context): return super().as_sql( compiler, connection, template='((%%(expressions)s) * 180 / %s)' % math.pi, **extra_context )
[문서]class Exp(NumericOutputFieldMixin, Transform): function = 'EXP' lookup_name = 'exp'
[문서]class Floor(Transform): function = 'FLOOR' lookup_name = 'floor'
[문서]class Ln(NumericOutputFieldMixin, Transform): function = 'LN' lookup_name = 'ln'
[문서]class Log(FixDecimalInputMixin, NumericOutputFieldMixin, Func): function = 'LOG' arity = 2 def as_sqlite(self, compiler, connection, **extra_context): if not getattr(connection.ops, 'spatialite', False): return self.as_sql(compiler, connection) # This function is usually Log(b, x) returning the logarithm of x to # the base b, but on SpatiaLite it's Log(x, b). clone = self.copy() clone.set_source_expressions(self.get_source_expressions()[::-1]) return clone.as_sql(compiler, connection, **extra_context)
[문서]class Mod(FixDecimalInputMixin, NumericOutputFieldMixin, Func): function = 'MOD' arity = 2
[문서]class Pi(NumericOutputFieldMixin, Func): function = 'PI' arity = 0 def as_oracle(self, compiler, connection, **extra_context): return super().as_sql(compiler, connection, template=str(math.pi), **extra_context)
[문서]class Power(NumericOutputFieldMixin, Func): function = 'POWER' arity = 2
[문서]class Radians(NumericOutputFieldMixin, Transform): function = 'RADIANS' lookup_name = 'radians' def as_oracle(self, compiler, connection, **extra_context): return super().as_sql( compiler, connection, template='((%%(expressions)s) * %s / 180)' % math.pi, **extra_context )
[문서]class Round(Transform): function = 'ROUND' lookup_name = 'round'
[문서]class Sin(NumericOutputFieldMixin, Transform): function = 'SIN' lookup_name = 'sin'
[문서]class Sqrt(NumericOutputFieldMixin, Transform): function = 'SQRT' lookup_name = 'sqrt'
[문서]class Tan(NumericOutputFieldMixin, Transform): function = 'TAN' lookup_name = 'tan'
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