go_blog/controllers/showpost.go

package controllers

import (
	"go_blog/models"
	"go_blog/utils"
	"net/http"
	"strconv"

	"github.com/gin-gonic/gin"
	"gorm.io/gorm" // <-- 确保导入 gorm
)

func ShowPost(c *gin.Context) {
	tm, exists := c.Get("ThemeManager")
	if !exists {
		c.String(http.StatusInternalServerError, "Theme manager not found")
		return
	}
	themeManager, ok := tm.(*utils.ThemeManager)
	if !ok {
		c.String(http.StatusInternalServerError, "Invalid theme manager type")
		return
	}

	idParam := c.Param("id")
	id, err := strconv.ParseInt(idParam, 10, 32)
	if err != nil {
		c.String(http.StatusBadRequest, "Invalid post ID format")
		return
	}

	var content = models.Content{Cid: int32(id)}
	// 从 Gin 上下文中获取 DB 实例
	dbInterface, exists := c.Get("DB")
	if !exists {
		c.String(http.StatusInternalServerError, "DB not found in context")
		return
	}
	db, ok := dbInterface.(*gorm.DB)
	if !ok {
		c.String(http.StatusInternalServerError, "Invalid DB type in context")
		return
	}

	result := db.First(&content)
	if result.Error != nil {
		if result.Error == gorm.ErrRecordNotFound {
			c.String(http.StatusNotFound, "Post not found")
		} else {
			c.String(http.StatusInternalServerError, "Error fetching post: "+result.Error.Error())
		}
		return
	}

	// 假设你的主题中有一个名为 "post" 的模板 (post.html 或 post.tmpl)
	// 注意：当前的 default 主题 (web/themes/default/templates/) 并没有 post.tmpl，你需要添加它。
	tpl := themeManager.GetTemplate("post")
	if tpl == nil {
		c.String(http.StatusInternalServerError, "Template 'post' not found in current theme: "+themeManager.CurrentTheme()+". Make sure 'post.html' or 'post.tmpl' exists in the theme's templates directory.")
		return
	}

	c.Status(http.StatusOK)
	c.Header("Content-Type", "text/html; charset=utf-8")
	// 将整个 content 对象传递给模板。模板内部通过 {{ .Title }} {{ .Text }} 等访问。
	err = tpl.Execute(c.Writer, content)
	if err != nil {
		c.String(http.StatusInternalServerError, "Error rendering template: "+err.Error())
	}
}