我们从Python开源项目中，提取了以下33个代码示例，用于说明如何使用django.db.models.fields.DateField()。
def check_expression_support(self, expression): bad_fields = (fields.DateField, fields.DateTimeField, fields.TimeField) bad_aggregates = (aggregates.Sum, aggregates.Avg, aggregates.Variance, aggregates.StdDev) if isinstance(expression, bad_aggregates): for expr in expression.get_source_expressions(): try: output_field = expr.output_field if isinstance(output_field, bad_fields): raise NotImplementedError( 'You cannot use Sum, Avg, StdDev, and Variance ' 'aggregations on date/time fields in sqlite3 ' 'since date/time is saved as text.' ) except FieldError: # Not every subexpression has an output_field which is fine # to ignore. pass
def get_django_field_map(self): from django.db.models import fields as djf return [ (djf.AutoField, PrimaryKeyField), (djf.BigIntegerField, BigIntegerField), # (djf.BinaryField, BlobField), (djf.BooleanField, BooleanField), (djf.CharField, CharField), (djf.DateTimeField, DateTimeField), # Extends DateField. (djf.DateField, DateField), (djf.DecimalField, DecimalField), (djf.FilePathField, CharField), (djf.FloatField, FloatField), (djf.IntegerField, IntegerField), (djf.NullBooleanField, partial(BooleanField, null=True)), (djf.TextField, TextField), (djf.TimeField, TimeField), (djf.related.ForeignKey, ForeignKeyField), ]
def get_db_converters(self, expression): converters = super(DatabaseOperations, self).get_db_converters(expression) internal_type = expression.output_field.get_internal_type() if internal_type == 'DateTimeField': converters.append(self.convert_datetimefield_value) elif internal_type == 'DateField': converters.append(self.convert_datefield_value) elif internal_type == 'TimeField': converters.append(self.convert_timefield_value) elif internal_type == 'DecimalField': converters.append(self.convert_decimalfield_value) elif internal_type == 'UUIDField': converters.append(self.convert_uuidfield_value) elif internal_type in ('NullBooleanField', 'BooleanField'): converters.append(self.convert_booleanfield_value) return converters
def _encodeValue(self, field, value): if value is fields.NOT_PROVIDED: return pyamf.Undefined if value is None: return value # deal with dates .. if isinstance(field, fields.DateTimeField): return value elif isinstance(field, fields.DateField): return datetime.datetime( value.year, value.month, value.day, 0, # hour 0, # minute 0, # second ) elif isinstance(field, fields.TimeField): return datetime.datetime( 1970, # year 1, # month 1, # day value.hour, value.minute, value.second, value.microsecond ) elif isinstance(value, files.FieldFile): return value.name return value
def _decodeValue(self, field, value): if value is pyamf.Undefined: return fields.NOT_PROVIDED if isinstance(field, fields.AutoField) and value == 0: return None elif isinstance(field, fields.DateTimeField): # deal with dates return value elif isinstance(field, fields.DateField): if not value: return None return datetime.date(value.year, value.month, value.day) elif isinstance(field, fields.TimeField): if not value: return None return datetime.time( value.hour, value.minute, value.second, value.microsecond, ) return value
def get_db_converters(self, expression): converters = super(DatabaseOperations, self).get_db_converters(expression) internal_type = expression.output_field.get_internal_type() if internal_type == 'DateTimeField': converters.append(self.convert_datetimefield_value) elif internal_type == 'DateField': converters.append(self.convert_datefield_value) elif internal_type == 'TimeField': converters.append(self.convert_timefield_value) elif internal_type == 'DecimalField': converters.append(self.convert_decimalfield_value) elif internal_type == 'UUIDField': converters.append(self.convert_uuidfield_value) return converters
def __init__(self, lookup, lookup_type): super(Date, self).__init__(output_field=fields.DateField()) self.lookup = lookup self.col = None self.lookup_type = lookup_type
def resolve_expression(self, query=None, allow_joins=True, reuse=None, summarize=False, for_save=False): copy = self.copy() copy.col = query.resolve_ref(self.lookup, allow_joins, reuse, summarize) field = copy.col.output_field assert isinstance(field, fields.DateField), "%r isn't a DateField." % field.name if settings.USE_TZ: assert not isinstance(field, fields.DateTimeField), ( "%r is a DateTimeField, not a DateField." % field.name ) return copy
def set_date(instance, field): """ DateField """ start = 2 * 24 * 3600 end = 5 * 365 * 24 * 3600 value = now() - timedelta(seconds=random.randint(start, end)) setattr(instance, field.name, value)
def check_expression_support(self, expression): bad_fields = (fields.DateField, fields.DateTimeField, fields.TimeField) bad_aggregates = (aggregates.Sum, aggregates.Avg, aggregates.Variance, aggregates.StdDev) if isinstance(expression, bad_aggregates): try: output_field = expression.input_field.output_field if isinstance(output_field, bad_fields): raise NotImplementedError( 'You cannot use Sum, Avg, StdDev and Variance aggregations ' 'on date/time fields in sqlite3 ' 'since date/time is saved as text.') except FieldError: # not every sub-expression has an output_field which is fine to # ignore pass
def export_selected_data(self,request,queryset): ops = self.model._meta workbook = xlwt.Workbook(encoding='utf-8') dd = datetime.date.today().strftime('%Y%m%d') file_name = force_text(ops.verbose_name+dd) sheet = workbook.add_sheet(force_text(ops.verbose_name)) obj_fields = getattr(self,'export_fields',None) or self.list_display or self.fields head_col_index = 0 for field in obj_fields: col_name = field try: f = ops.get_field(field) col_name = f.verbose_name except Exception,e: f = getattr(self.model,field) if hasattr(f,'short_description'): col_name = f.short_description sheet.write(0,head_col_index,force_text(col_name)) head_col_index+=1 row_index = 1 for obj in queryset: col_index = 0 for field in obj_fields: f = field try: f = ops.get_field(field) except Exception,e: pass v = getattr(obj,field,'') if hasattr(v,'__call__') or callable(v): v = v() elif type(f) == fields.DateField: v = v.strftime('%Y-%m-%d') elif type(f) == fields.DateTimeField: v = v.strftime('%Y-%m-%d %H:%M') elif type(f) == fields.CharField and f.choices: fc = 'get_'+field+'_display' v = getattr(obj,fc)() elif type(f) == related.ForeignKey: v = str(v) sheet.write(row_index,col_index,v) col_index += 1 row_index += 1 response = HttpResponse(content_type='application/vnd.ms-excel') agent = request.META.get('HTTP_USER_AGENT') nn = smart_str(file_name) if agent and re.search('MSIE',agent): nn = urlquote(file_name) response['Content-Disposition'] = 'attachment; filename=%s.xls'%nn workbook.save(response) return response #self.message_user(request,'SUCCESS')
