feat:support cursor of index articles

Author: nk-akun

api/guest/articles.go

@@ -38,22 +38,24 @@ func PostArticle(c *gin.Context) {
 // GetArticleList is the api that returns a list of articles
 // if you want to add parameter like limit, please use url like /article?limit=10
 func GetArticleList(c *gin.Context) {
-	limit := c.DefaultQuery("limit", "50")
-	sortby := c.DefaultQuery("sortby", "id")
+	limit := c.DefaultQuery("limit", "10")
+	sortby := c.DefaultQuery("sortby", "create_time")
 	order := c.DefaultQuery("order", "desc")
+	cursor := c.DefaultQuery("cursor", "2559090472000")
 	// userID
 
 	var err error
 
-	limitNum, err := strconv.Atoi(limit)
-	if err != nil || limitNum <= 0 || order != "desc" && order != "asc" {
+	limitNum, err1 := strconv.Atoi(limit)
+	cursorTime, err2 := strconv.ParseInt(cursor, 10, 64)
+	if err1 != nil || err2 != nil || limitNum <= 0 || order != "desc" && order != "asc" {
 		err = errors.New("参数有误")
 	}
 	if err != nil {
 		setAPIResponse(c, nil, err.Error(), false)
 	}
 
-	resp, err := service.ArticleService.GetArticleList(limitNum, sortby, order)
+	resp, err := service.ArticleService.GetArticleList(limitNum, cursorTime, sortby, order)
 	if err != nil {
 		setAPIResponse(c, nil, err.Error(), false)
 	} else {

model/response.go

@@ -28,6 +28,7 @@ type ActionLink struct {
 // ArticleListResponse ...
 type ArticleListResponse struct {
 	TotalNum    int                 `json:"total_num"`
+	Cursor      int64               `json:"cursor"`
 	ArticleList []*ArticleBriefInfo `json:"article_list"`
 }
 

repository/article_repo.go

@@ -22,9 +22,9 @@ func (r *articleRepository) Create(db *gorm.DB, article *model.Article) error {
 	return db.Create(article).Error
 }
 
-func (r *articleRepository) GetArticleFields(db *gorm.DB, fields []string, limit int, sortby string, order string) []model.Article {
+func (r *articleRepository) GetArticleFields(db *gorm.DB, fields []string, cursorTime int64, limit int, sortby string, order string) []model.Article {
 	var articles []model.Article
-	db.Select(fields).Order(fmt.Sprintf("%s %s", sortby, order)).Limit(limit).Find(&articles)
+	db.Where("create_time < ?", cursorTime).Select(fields).Order(fmt.Sprintf("%s %s", sortby, order)).Limit(limit).Find(&articles)
 	return articles
 }
 

service/articles.go

@@ -34,12 +34,19 @@ func (s *articleService) BuildArticle(userID int64, title string, content string
 	return article, nil
 }
 
-func (s *articleService) GetArticleList(limit int, sortby string, order string) (*model.ArticleListResponse, error) {
+func (s *articleService) GetArticleList(limit int, cursorTime int64, sortby string, order string) (*model.ArticleListResponse, error) {
 	resp := &model.ArticleListResponse{}
 	fields := []string{"id", "title", "create_time", "user_id", "view_count", "comment_count", "like_count"}
-	articles := repository.ArticleRepository.GetArticleFields(util.DB(), fields, limit, sortby, order)
+	articles := repository.ArticleRepository.GetArticleFields(util.DB(), fields, cursorTime, limit, sortby, order)
 
 	briefList := BuildArticleList(articles)
+
+	resp.Cursor = cursorTime
+	for i := range briefList {
+		if briefList[i].CreateTime < resp.Cursor {
+			resp.Cursor = briefList[i].CreateTime
+		}
+	}
 	resp.ArticleList = briefList
 	resp.TotalNum = len(briefList)
 	return resp, nil

site/components/LoadMore.vue

@@ -42,7 +42,7 @@ export default {
   },
   data() {
     return {
-      cursor: 0, // 分页标识
+      cursor: 2559090472000, // 分页标识
       results: this.initData.article_list || [], // 列表数据
       hasMore: true, // 是否有更多数据
       loading: false, // 是否正在加载中
@@ -62,9 +62,9 @@ export default {
           cursor: this.cursor,
         })
         const ret = await this.$axios.get(this.url, {
-          // params: _params,
+          params: _params,
         })
-        // this.cursor = ret.cursor
+        this.cursor = ret.cursor
         if (ret.article_list && ret.total_num) {
           ret.article_list.forEach((item) => {
             this.results.push(item)