(self, compiler, connection)
| 256 | super().__init__(expression, output_field=output_field, **extra) |
| 257 | |
| 258 | def as_sql(self, compiler, connection): |
| 259 | sql, params = compiler.compile(self.lhs) |
| 260 | tzname = None |
| 261 | if isinstance(self.lhs.output_field, DateTimeField): |
| 262 | tzname = self.get_tzname() |
| 263 | elif self.tzinfo is not None: |
| 264 | raise ValueError("tzinfo can only be used with DateTimeField.") |
| 265 | if isinstance(self.output_field, DateTimeField): |
| 266 | sql, params = connection.ops.datetime_trunc_sql( |
| 267 | self.kind, sql, tuple(params), tzname |
| 268 | ) |
| 269 | elif isinstance(self.output_field, DateField): |
| 270 | sql, params = connection.ops.date_trunc_sql( |
| 271 | self.kind, sql, tuple(params), tzname |
| 272 | ) |
| 273 | elif isinstance(self.output_field, TimeField): |
| 274 | sql, params = connection.ops.time_trunc_sql( |
| 275 | self.kind, sql, tuple(params), tzname |
| 276 | ) |
| 277 | else: |
| 278 | raise ValueError( |
| 279 | "Trunc only valid on DateField, TimeField, or DateTimeField." |
| 280 | ) |
| 281 | return sql, params |
| 282 | |
| 283 | def resolve_expression( |
| 284 | self, query=None, allow_joins=True, reuse=None, summarize=False, for_save=False |
nothing calls this directly
no test coverage detected