Initial commit of akmon project
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create_training_stream_events.sql
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142
create_training_stream_events.sql
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-- Training stream events table & policies for Supabase realtime integration
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-- Generated by GitHub Copilot to support the体育课训练 dashboard mock-to-cloud transition.
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CREATE TABLE IF NOT EXISTS public.training_stream_events (
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id uuid PRIMARY KEY DEFAULT gen_random_uuid(), -- 记录ID
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training_id uuid NOT NULL, -- 训练会话ID，未来可关联 training_sessions
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event_type VARCHAR(32) NOT NULL, -- 事件类型：ack / telemetry / state / summary 等
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class_id uuid NOT NULL REFERENCES public.ak_classes(id) ON DELETE CASCADE, -- 班级ID
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student_id uuid REFERENCES public.ak_users(id) ON DELETE CASCADE, -- 学生ID，可为空表示班级级别事件
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device_id uuid REFERENCES public.ak_devices(id) ON DELETE SET NULL, -- 设备ID
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status VARCHAR(64), -- 状态描述，如 online/offline/ack_failed
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ack BOOLEAN, -- 是否为应答成功
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metrics JSONB, -- 指标明细：hr/spo2/temp 等
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payload JSONB, -- 额外原始载荷
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ingest_source VARCHAR(32) DEFAULT 'gateway', -- 来源：gateway/mock/simulator 等
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ingest_note TEXT, -- 额外说明，如模拟批次
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recorded_at TIMESTAMP WITH TIME ZONE NOT NULL DEFAULT now(), -- 事件发生时间
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ingested_at TIMESTAMP WITH TIME ZONE NOT NULL DEFAULT now(), -- 写入时间
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CONSTRAINT training_stream_events_target_chk CHECK (
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class_id IS NOT NULL
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)
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);
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COMMENT ON TABLE public.training_stream_events IS '课堂训练实时事件流，供 Supabase realtime 推送给教师端';
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COMMENT ON COLUMN public.training_stream_events.training_id IS '训练会话ID（同一课堂 session 内共享）';
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COMMENT ON COLUMN public.training_stream_events.event_type IS '事件类型：ack/telemetry/state/summary 等';
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COMMENT ON COLUMN public.training_stream_events.class_id IS '班级ID，限定可见范围';
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COMMENT ON COLUMN public.training_stream_events.student_id IS '学生ID；为空表示班级级别事件';
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COMMENT ON COLUMN public.training_stream_events.device_id IS '关联设备；为空表示未绑定或无关设备事件';
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COMMENT ON COLUMN public.training_stream_events.metrics IS '结构化指标（JSON），用于实时展示';
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COMMENT ON COLUMN public.training_stream_events.payload IS '原始负载（JSON），用于调试或回放';
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COMMENT ON COLUMN public.training_stream_events.ingest_source IS '事件来源：gateway/mock/simulator/service 等';
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COMMENT ON COLUMN public.training_stream_events.ingest_note IS '模拟批次、异常说明等';
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CREATE INDEX IF NOT EXISTS idx_training_stream_events_training_recorded
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ON public.training_stream_events (training_id, recorded_at DESC);
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CREATE INDEX IF NOT EXISTS idx_training_stream_events_class_recorded
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ON public.training_stream_events (class_id, recorded_at DESC);
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CREATE INDEX IF NOT EXISTS idx_training_stream_events_student_recorded
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ON public.training_stream_events (student_id, recorded_at DESC);
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CREATE INDEX IF NOT EXISTS idx_training_stream_events_event_type
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ON public.training_stream_events (event_type);
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CREATE INDEX IF NOT EXISTS idx_training_stream_events_device_recorded
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ON public.training_stream_events (device_id, recorded_at DESC);
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ALTER TABLE public.training_stream_events ENABLE ROW LEVEL SECURITY;
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-- 服务端（service_role）拥有完全访问权限，用于 Edge Function / Gateway 写入
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CREATE POLICY "service role full access" ON public.training_stream_events
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FOR ALL
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USING (auth.role() = 'service_role')
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WITH CHECK (auth.role() = 'service_role');
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-- 教师可以读取自己负责班级的训练事件
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CREATE POLICY "teacher read class training events" ON public.training_stream_events
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FOR SELECT
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TO authenticated
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USING (
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auth.role() = 'service_role' OR
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public.current_user_has_permission('admin.system.manage') OR
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public.current_user_has_permission('school_admin.class.manage') OR
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EXISTS (
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SELECT 1
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FROM public.ak_users u
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JOIN public.ak_teacher_roles tr ON tr.user_id = u.id
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WHERE u.auth_id = auth.uid()
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AND tr.class_id = public.training_stream_events.class_id
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)
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);
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-- 学生可查看自己的训练事件
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CREATE POLICY "student read own training events" ON public.training_stream_events
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FOR SELECT
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TO authenticated
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USING (
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public.current_user_has_permission('student.training.read') AND
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EXISTS (
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SELECT 1
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FROM public.ak_users u
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WHERE u.auth_id = auth.uid()
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AND u.id = public.training_stream_events.student_id
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)
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);
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DROP POLICY "teacher insert training events" ON public.training_stream_events;
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-- 仅允许服务端或具备班级权限的教师写入事件（方便课堂模拟工具）
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CREATE POLICY "teacher insert training events" ON public.training_stream_events
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FOR INSERT
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TO authenticated
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WITH CHECK (
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auth.role() = 'service_role' OR
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EXISTS (
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SELECT 1
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FROM public.ak_users u
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JOIN public.ak_teacher_roles tr ON tr.user_id = u.id
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WHERE u.auth_id = auth.uid()
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AND tr.class_id = public.training_stream_events.class_id
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)
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);
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-- 清理时只允许服务角色删除
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CREATE POLICY "service role delete training events" ON public.training_stream_events
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FOR DELETE
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USING (auth.role() = 'service_role');
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-- 将表加入 Supabase realtime publication，避免重复添加导致错误
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DO $$
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BEGIN
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IF NOT EXISTS (
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SELECT 1 FROM pg_catalog.pg_publication_tables
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WHERE pubname = 'supabase_realtime'
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AND schemaname = 'public'
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AND tablename = 'training_stream_events'
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) THEN
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EXECUTE 'ALTER PUBLICATION supabase_realtime ADD TABLE public.training_stream_events';
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END IF;
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END;
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$$;
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-- 便于查询学生最近一次指标的视图
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CREATE OR REPLACE VIEW public.training_stream_latest_metrics AS
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SELECT DISTINCT ON (training_id, student_id)
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id,
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training_id,
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class_id,
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student_id,
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device_id,
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event_type,
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status,
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metrics,
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payload,
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recorded_at,
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ingested_at
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FROM public.training_stream_events
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WHERE event_type IN ('telemetry', 'metrics')
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ORDER BY training_id, student_id, recorded_at DESC, ingested_at DESC, id DESC;
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COMMENT ON VIEW public.training_stream_latest_metrics IS '每个学生在当前训练中的最近一次 telemetry/metrics 事件';
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