1.修复创建多个向量库2.查看试卷没有用户答案3.向量化自动出题

src/main/java/top/tqx/demo_1/mapper/QuestionMapper.java

@@ -1,7 +1,16 @@
 package top.tqx.demo_1.mapper;
 
 import com.baomidou.mybatisplus.core.mapper.BaseMapper;
+import org.apache.ibatis.annotations.Select;
 import top.tqx.demo_1.entity.Question;
 
+import java.util.List;
+
 public interface QuestionMapper extends BaseMapper<Question> {
+
+    /**
+     * 根据文档ID查询已有的题目题干，用于去重
+     */
+    @Select("SELECT exclude_stems AS stem FROM question WHERE document_id = #{documentId} AND exclude_stems IS NOT NULL AND is_deleted = 0")
+    List<String> selectStemsByDocumentId(String documentId);
 }