this function is usually atan2y x returning the inverse tangent of y x but it s atan2x y on spatialite 5 0 0 cast integers to float to avoid inconsistentbuggy behavior if the arguments are mixed between integer and float or decimal https www gaiagis itfossillibspatialitetktview name0f72cca3a2 this function is usually logb x returning the logarithm of x to the base b but on spatialite it s logx b this function is usually atan2 y x returning the inverse tangent of y x but it s atan2 x y on spatialite 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 this function is usually log b x returning the logarithm of x to the base b but on spatialite it s log x b override transform s arity 1 to enable passing precision
import math

from django.db.models.expressions import Func, Value
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


class Abs(Transform):
    function = "ABS"
    lookup_name = "abs"


class ACos(NumericOutputFieldMixin, Transform):
    function = "ACOS"
    lookup_name = "acos"


class ASin(NumericOutputFieldMixin, Transform):
    function = "ASIN"
    lookup_name = "asin"


class ATan(NumericOutputFieldMixin, Transform):
    function = "ATAN"
    lookup_name = "atan"


class ATan2(NumericOutputFieldMixin, Func):
    function = "ATAN2"
    arity = 2

    def as_sqlite(self, compiler, connection, **extra_context):
        if not getattr(
            connection.ops, "spatialite", False
        ) or connection.ops.spatial_version >= (5, 0, 0):
            return self.as_sql(compiler, connection)
        
        
        
        
        
        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)


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)


class Cos(NumericOutputFieldMixin, Transform):
    function = "COS"
    lookup_name = "cos"


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
        )


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,
        )


class Exp(NumericOutputFieldMixin, Transform):
    function = "EXP"
    lookup_name = "exp"


class Floor(Transform):
    function = "FLOOR"
    lookup_name = "floor"


class Ln(NumericOutputFieldMixin, Transform):
    function = "LN"
    lookup_name = "ln"


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)
        
        
        clone = self.copy()
        clone.set_source_expressions(self.get_source_expressions()[::-1])
        return clone.as_sql(compiler, connection, **extra_context)


class Mod(FixDecimalInputMixin, NumericOutputFieldMixin, Func):
    function = "MOD"
    arity = 2


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
        )


class Power(NumericOutputFieldMixin, Func):
    function = "POWER"
    arity = 2


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,
        )


class Random(NumericOutputFieldMixin, Func):
    function = "RANDOM"
    arity = 0

    def as_mysql(self, compiler, connection, **extra_context):
        return super().as_sql(compiler, connection, function="RAND", **extra_context)

    def as_oracle(self, compiler, connection, **extra_context):
        return super().as_sql(
            compiler, connection, function="DBMS_RANDOM.VALUE", **extra_context
        )

    def as_sqlite(self, compiler, connection, **extra_context):
        return super().as_sql(compiler, connection, function="RAND", **extra_context)

    def get_group_by_cols(self):
        return []


class Round(FixDecimalInputMixin, Transform):
    function = "ROUND"
    lookup_name = "round"
    arity = None  

    def __init__(self, expression, precision=0, **extra):
        super().__init__(expression, precision, **extra)

    def as_sqlite(self, compiler, connection, **extra_context):
        precision = self.get_source_expressions()[1]
        if isinstance(precision, Value) and precision.value < 0:
            raise ValueError("SQLite does not support negative precision.")
        return super().as_sqlite(compiler, connection, **extra_context)

    def _resolve_output_field(self):
        source = self.get_source_expressions()[0]
        return source.output_field


class Sign(Transform):
    function = "SIGN"
    lookup_name = "sign"


class Sin(NumericOutputFieldMixin, Transform):
    function = "SIN"
    lookup_name = "sin"


class Sqrt(NumericOutputFieldMixin, Transform):
    function = "SQRT"
    lookup_name = "sqrt"


class Tan(NumericOutputFieldMixin, Transform):
    function = "TAN"
    lookup_name = "tan"