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import datetime
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from rest_framework import serializers
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from django_filters.rest_framework import FilterSet
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import django_filters
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from app.models import TP
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import logging
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logger = logging.getLogger('mylogger')
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class SerialMyModel(serializers.ModelSerializer):
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class Meta:
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model = TP
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fields = "__all__"
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class SerialFilter(FilterSet):
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"""
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过滤器，支持模糊查询
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record_time，日期时间格式，如 2023-01-01 00:00:00
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police_id，支持模糊匹配
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event_type，支持模糊匹配
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"""
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record_time = django_filters.DateTimeFilter(field_name='record_time', lookup_expr='icontains')
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police_id = django_filters.CharFilter(field_name='police_id', lookup_expr='icontains')
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event_type = django_filters.CharFilter(field_name='event_type', lookup_expr='icontains')
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# 记录时间范围查询
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start_time = django_filters.DateTimeFilter(field_name='record_time', lookup_expr='gte')
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# end_time = django_filters.DateTimeFilter(field_name='record_time', lookup_expr='lte')
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end_time = django_filters.DateTimeFilter(field_name='record_time', method='time_range_filter')
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# todo bug: start_time 和 end_time同一天的情况 done
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violation = django_filters.NumberFilter(field_name='is_violation', method='is_violation_query')
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violation_type = django_filters.CharFilter(field_name='ai_analysis', lookup_expr='icontains')
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def time_range_filter(self, queryset, name, value):
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"""
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@params queryset: 为TP.objects.all()返回的合集, 即视图类中的的queryset
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@params name: 为field_name
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@params value: 为前端通过end_time字段传过来的值
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"""
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return queryset.filter(record_time__lte=value + datetime.timedelta(days=1))
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def is_violation_query(self, queryset, name, value):
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if value == 2:
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return queryset
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elif value == 1:
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return queryset.filter(is_violation=True)
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elif value == 0:
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return queryset.filter(is_violation=False)
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else:
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return queryset.filter(is_violation=True)
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class Meta:
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# 指定模型
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models = TP
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# 指定需要模糊查询的字段
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fields = ("record_time", "police_id", "event_type", "ai_analysis",)
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