PaperBasicInfo

safety-cedu-service/src/main/java/org/qinan/cedu/mapper/ClassStudentMapper.java

@@ -2,11 +2,23 @@ package org.qinan.cedu.mapper;
 
 import com.baomidou.mybatisplus.core.mapper.BaseMapper;
 import org.apache.ibatis.annotations.Mapper;
+import org.apache.ibatis.annotations.Param;
 import org.qinan.cedu.model.entity.ClassStudentDO;
+import org.qinan.cedu.model.vo.ClassStudentStatVO;
+
+import java.util.List;
 
 /**
  * 班级学员 Mapper
  */
 @Mapper
 public interface ClassStudentMapper extends BaseMapper<ClassStudentDO> {
+
+    /**
+     * 按班级分组统计学员数量（涉及学员人员数、完成人员数）
+     *
+     * @param classIds 班级id集合
+     * @return 各班级学员统计结果
+     */
+    List<ClassStudentStatVO> countByClassIds(@Param("classIds") List<Long> classIds);
 }

safety-cedu-service/src/main/java/org/qinan/cedu/model/vo/ClassManagementVO.java

@@ -93,4 +93,10 @@ public class ClassManagementVO extends BaseVO {
      */
     @ApiModelProperty("试卷id")
     private String paperId;
+
+    @ApiModelProperty("涉及学员人员数")
+    private Long studentCount;
+
+    @ApiModelProperty("完成人员数")
+    private Long completedCount;
 }

safety-cedu-service/src/main/java/org/qinan/cedu/model/vo/ClassStudentStatVO.java

@@ -0,0 +1,20 @@
+package org.qinan.cedu.model.vo;
+
+import io.swagger.annotations.ApiModelProperty;
+import lombok.Data;
+
+/**
+ * 班级学员数量统计结果
+ */
+@Data
+public class ClassStudentStatVO {
+
+    @ApiModelProperty("班级id")
+    private Long classId;
+
+    @ApiModelProperty("涉及学员人员数")
+    private Long studentCount;
+
+    @ApiModelProperty("完成人员数")
+    private Long completedCount;
+}

safety-cedu-service/src/main/java/org/qinan/cedu/service/impl/ClassManagementServiceImpl.java

@@ -7,20 +7,27 @@ import org.qinan.cedu.convertor.ClassManagementConvertor;
 import org.qinan.cedu.enums.ClassStatusEnum;
 import org.qinan.cedu.enums.DeleteEnum;
 import org.qinan.cedu.mapper.ClassManagementMapper;
+import org.qinan.cedu.mapper.ClassStudentMapper;
 import org.qinan.cedu.model.dto.ClassManagementDTO;
 import org.qinan.cedu.model.entity.ClassManagementDO;
 import org.qinan.cedu.model.query.ClassManagementPageQuery;
 import org.qinan.cedu.model.vo.ClassManagementVO;
+import org.qinan.cedu.model.vo.ClassStudentStatVO;
 import org.qinan.cedu.service.ClassManagementService;
 import org.qinan.safetyeval.infrastructure.support.InsertFieldDefaults;
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.stereotype.Service;
 import org.springframework.transaction.annotation.Transactional;
+import org.springframework.util.CollectionUtils;
 import org.springframework.util.StringUtils;
 
 import java.time.LocalDate;
 import java.time.LocalDateTime;
+import java.util.List;
+import java.util.Map;
 import java.util.Objects;
+import java.util.function.Function;
+import java.util.stream.Collectors;
 
 /**
  * 班级管理服务实现
@@ -32,9 +39,12 @@ public class ClassManagementServiceImpl extends ServiceImpl<ClassManagementMappe
     @Autowired
     private ClassManagementConvertor classManagementConvertor;
 
+    @Autowired
+    private ClassStudentMapper classStudentMapper;
+
     @Override
     public IPage<ClassManagementVO> pageQuery(ClassManagementPageQuery query) {
-        return this.lambdaQuery()
+        IPage<ClassManagementVO> page = this.lambdaQuery()
                 .eq(ClassManagementDO::getDeleteEnum, DeleteEnum.FALSE.getCode())
                 .like(StringUtils.hasText(query.getClassCode()), ClassManagementDO::getClassCode, query.getClassCode())
                 .like(StringUtils.hasText(query.getClassName()), ClassManagementDO::getClassName, query.getClassName())
@@ -45,6 +55,32 @@ public class ClassManagementServiceImpl extends ServiceImpl<ClassManagementMappe
                 .orderByDesc(ClassManagementDO::getCreateTime)
                 .page(new Page<>(query.getCurrent(), query.getSize()))
                 .convert(classManagementConvertor::convertEToVo);
+        fillStudentCount(page.getRecords());
+        return page;
+    }
+
+    /**
+     * 填充当前页各班级的学员统计数（涉及学员人员数、完成人员数）
+     *
+     * @param records 当前页班级列表
+     */
+    private void fillStudentCount(List<ClassManagementVO> records) {
+        if (CollectionUtils.isEmpty(records)) {
+            return;
+        }
+        List<Long> classIds = records.stream()
+                .map(vo -> Long.valueOf(vo.getId()))
+                .collect(Collectors.toList());
+        Map<Long, ClassStudentStatVO> statMap = classStudentMapper.countByClassIds(classIds).stream()
+                .collect(Collectors.toMap(ClassStudentStatVO::getClassId, Function.identity()));
+        for (ClassManagementVO vo : records) {
+            ClassStudentStatVO stat = statMap.get(Long.valueOf(vo.getId()));
+            if (stat == null) {
+                continue;
+            }
+            vo.setStudentCount(stat.getStudentCount());
+            vo.setCompletedCount(stat.getCompletedCount());
+        }
     }
 
     @Override

safety-cedu-service/src/main/resources/mapper/ClassStudentMapper.xml

@@ -0,0 +1,18 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE mapper PUBLIC "-//mybatis//DTD Mapper 3.0//EN" "http://mybatis.org/dtd/mybatis-3-mapper.dtd">
+<mapper namespace="org.qinan.cedu.mapper.ClassStudentMapper">
+
+    <select id="countByClassIds" resultType="org.qinan.cedu.model.vo.ClassStudentStatVO">
+        SELECT class_id AS classId
+        , COUNT(*) AS studentCount
+        <!-- 学习状态：3-已完成 -->
+        , SUM(study_status = 3) AS completedCount
+        FROM class_student
+        WHERE delete_enum = 'false'
+        AND class_id IN
+        <foreach collection="classIds" item="classId" open="(" separator="," close=")">
+            #{classId}
+        </foreach>
+        GROUP BY class_id
+    </select>
+</mapper>