104 lines
3.3 KiB
Rust
104 lines
3.3 KiB
Rust
//! 删除文章接口。
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//!
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//! 采用软删除方式，将 posts.deleted_at 设置为当前时间，
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//! 并按影响范围失效相关缓存。
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//! Dioxus server function，注册在 `/api` 路径下。
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//! 仅在 `feature = "server"` 启用的服务端构建中执行删除与缓存失效。
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use dioxus::prelude::*;
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#[cfg(feature = "server")]
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use super::helpers::get_current_admin_user;
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use super::types::CreatePostResponse;
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#[cfg(feature = "server")]
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use crate::api::error::AppError;
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#[cfg(feature = "server")]
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use crate::db::pool::get_conn;
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/// 删除指定文章。
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///
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/// 仅 admin 可调用；通过设置 deleted_at 实现软删除，
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/// 成功后按影响范围失效文章列表、标签云、统计、slug 及相关标签文章缓存。
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#[server(DeletePost, "/api")]
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pub async fn delete_post(post_id: i32) -> Result<CreatePostResponse, ServerFnError> {
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let _user = get_current_admin_user().await?;
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#[cfg(feature = "server")]
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{
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let mut client = get_conn().await.map_err(AppError::db_conn)?;
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let tx = client.transaction().await.map_err(AppError::tx)?;
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// 在事务内锁定行并读取 slug，避免并发更新导致缓存失效目标过期。
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let slug_row = tx
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.query_opt(
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"SELECT slug FROM posts WHERE id = $1 AND deleted_at IS NULL FOR UPDATE",
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&[&post_id],
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)
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.await
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.map_err(AppError::query)?;
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let Some(slug_row) = slug_row else {
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return Ok(CreatePostResponse {
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success: false,
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message: "文章不存在".to_string(),
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post_id: None,
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slug: None,
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});
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};
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let slug: String = slug_row.get(0);
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let tag_rows = tx
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.query(
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"SELECT t.name FROM tags t JOIN post_tags pt ON t.id = pt.tag_id WHERE pt.post_id = $1",
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&[&post_id],
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)
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.await
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.map_err(AppError::query)?;
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let tags: Vec<String> = tag_rows.iter().map(|r| r.get(0)).collect();
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// 软删除：仅影响未被删除的文章。
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let result = tx
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.execute(
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"UPDATE posts SET deleted_at = NOW() WHERE id = $1 AND deleted_at IS NULL",
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&[&post_id],
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)
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.await
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.map_err(AppError::tx)?;
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if result == 0 {
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return Ok(CreatePostResponse {
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success: false,
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message: "文章不存在".to_string(),
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post_id: None,
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slug: None,
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});
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}
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tx.commit().await.map_err(AppError::tx)?;
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// 删除后按影响范围精准失效缓存。
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crate::cache::invalidate_post_lists();
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crate::cache::invalidate_all_tags();
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crate::cache::invalidate_post_stats();
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crate::cache::invalidate_post_by_slug(&slug).await;
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crate::cache::invalidate_tag_posts_for(&tags).await;
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Ok(CreatePostResponse {
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success: true,
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message: "删除成功".to_string(),
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post_id: Some(post_id),
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slug: Some(slug),
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})
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}
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#[cfg(not(feature = "server"))]
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{
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Ok(CreatePostResponse {
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success: false,
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message: "server only".to_string(),
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post_id: None,
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slug: None,
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})
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}
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}
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