bug fixed

src/main/java/cn/wisenergy/chnmuseum/party/web/controller/LearningContentController.java

@@ -296,5 +296,91 @@ public class LearningContentController extends BaseController {
         return getResult(learningContent);
     }
 
+    /**
+     * 通用排序方法(拖拽排序/所有排序完成后点击保存)
+     *
+     * @param sourceId 源实体ID
+     * @param targetId 目标实体ID
+     * @return Void
+     */
+    @PutMapping("/sort")
+    public Map<String,Object> updateSortorder(String sourceId, String targetId) {
+        String moveType;
+        LearningContent theSource = this.learningContentService.getById(sourceId);
+        LearningContent theTarget = this.learningContentService.getById(targetId);
+
+        if(theSource.getSortorder() > theTarget.getSortorder()) {
+            moveType = "down";
+        } else {
+            moveType = "up";
+        }
+        Integer sourceSortorder = theSource.getSortorder();
+        Integer targetSortorder = theTarget.getSortorder();
+
+        boolean flag = false;
+        //默认sortorder为降序排序,向上移动
+        if ("up".equalsIgnoreCase(moveType) && sourceSortorder < targetSortorder) {
+            flag = true;
+            QueryWrapper<LearningContent> wrapper = new QueryWrapper<>();
+            wrapper.between("sortorder", sourceSortorder, targetSortorder);
+            wrapper.select("id", "sortorder");
+            List<LearningContent> list = this.learningContentService.list(wrapper);
+            for (LearningContent entity : list) {
+                if (!entity.getId().equals(sourceId)) {
+                    entity.setSortorder(entity.getSortorder() - 1);
+                    this.learningContentService.updateById(entity);
+                }
+            }
+        }
+        //默认sortorder为降序排序,向下移动
+        else if ("down".equalsIgnoreCase(moveType) && sourceSortorder > targetSortorder) {
+            flag = true;
+            QueryWrapper<LearningContent> wrapper = new QueryWrapper<>();
+            wrapper.between("sortorder", targetSortorder, sourceSortorder);
+            wrapper.select("id", "sortorder");
+            List<LearningContent> slideList = this.learningContentService.list(wrapper);
+            for (LearningContent entity : slideList) {
+                if (!entity.getId().equals(sourceId)) {
+                    entity.setSortorder(entity.getSortorder() + 1);
+                    this.learningContentService.updateById(entity);
+                }
+            }
+        }
+        //默认sortorder为正序排序,向下移动
+        else if ("down".equalsIgnoreCase(moveType) && sourceSortorder < targetSortorder) {
+            flag = true;
+            QueryWrapper<LearningContent> wrapper = new QueryWrapper<>();
+            wrapper.between("sortorder", sourceSortorder, targetSortorder);
+            wrapper.select("id", "sortorder");
+            List<LearningContent> slideList = this.learningContentService.list(wrapper);
+            for (LearningContent slide : slideList) {
+                if (!slide.getId().equals(sourceId)) {
+                    slide.setSortorder(slide.getSortorder() - 1);
+                    this.learningContentService.updateById(slide);
+                }
+            }
+        }
+        //默认sortorder为正序排序,向上移动
+        else if ("up".equalsIgnoreCase(moveType) && sourceSortorder > targetSortorder) {
+            flag = true;
+            QueryWrapper<LearningContent> wrapper = new QueryWrapper<>();
+            wrapper.between("sortorder", targetSortorder, sourceSortorder);
+            wrapper.select("id", "sortorder");
+            List<LearningContent> slideList = this.learningContentService.list(wrapper);
+            for (LearningContent slide : slideList) {
+                if (!slide.getId().equals(sourceId)) {
+                    slide.setSortorder(slide.getSortorder() + 1);
+                    this.learningContentService.updateById(slide);
+                }
+            }
+        }
+        if (flag) {
+            theSource.setSortorder(targetSortorder);
+            this.learningContentService.updateById(theSource);
+            return getSuccessResult();
+        }
+        return getFailResult();
+    }
+
 }