课程查询相关代码优化

src/main/java/com/teaching/backend/service/impl/courses/CoursesServiceImpl.java

@@ -186,10 +186,10 @@ public class CoursesServiceImpl extends ServiceImpl<CoursesMapper, Courses> impl
     private PageDTO<CoursesVO> queryForAdmin(CourseQuery courseQuery) {
         Page<Courses> page = courseQuery.toMpPageDefaultSortByCreateTime();
         Page<Courses> p = lambdaQuery()
-                .like(courseQuery.getName() != null, Courses::getName, courseQuery.getName())
-                .eq(courseQuery.getCategory() != null, Courses::getCategory, courseQuery.getCategory())
-                .eq(courseQuery.getNature() != null, Courses::getNature, courseQuery.getNature())
-                .eq(courseQuery.getAssessmenttype() != null, Courses::getAssessmenttype, courseQuery.getAssessmenttype())
+                .like(courseQuery.getName() != null && !courseQuery.getName().isEmpty(), Courses::getName, courseQuery.getName())
+                .eq(courseQuery.getCategory() != null && !courseQuery.getCategory().isEmpty(), Courses::getCategory, courseQuery.getCategory())
+                .eq(courseQuery.getNature() != null && !courseQuery.getNature().isEmpty(), Courses::getNature, courseQuery.getNature())
+                .eq(courseQuery.getAssessmenttype() != null &&!courseQuery.getAssessmenttype().isEmpty(), Courses::getAssessmenttype, courseQuery.getAssessmenttype())
                 .apply(courseQuery.getTeacher() != null && !courseQuery.getTeacher().isEmpty(), "FIND_IN_SET({0}, teacher)", courseQuery.getTeacher())
                 .page(page);
         return PageDTO.of(p, CoursesVO.class);