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Code Issues Releases Wiki Activity

fix: NPE when navigation post not exists (#3847) 

#### What type of PR is this?
/kind bug
/area core
/milestone 2.5.x

#### What this PR does / why we need it:
修复文章上下篇数据查询 NPE 问题

#### Does this PR introduce a user-facing change?

```release-note
None
```
pull/3852/head v2.5.0-rc.1
guqing 2023-04-24 21:20:14 +08:00 committed by GitHub
parent 18c0ced64e
commit ed3a618ed4
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1 changed files with 11 additions and 2 deletions
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13
application/src/main/java/run/halo/app/theme/finders/impl/PostFinderImpl.java
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@ -22,6 +22,7 @@ import run.halo.app.content.PostService;
import run.halo.app.core.extension.content.Post;
import run.halo.app.extension.ListResult;
import run.halo.app.extension.ReactiveExtensionClient;
import run.halo.app.extension.exception.ExtensionNotFoundException;
import run.halo.app.infra.utils.HaloUtils;
import run.halo.app.theme.finders.Finder;
import run.halo.app.theme.finders.PostFinder;
@ -85,9 +86,9 @@ public class PostFinderImpl implements PostFinder {
postPreviousNextPair(postNames, currentName);
String previousPostName = previousNextPair.getLeft();
String nextPostName = previousNextPair.getRight();
return getByName(previousPostName)
return fetchByName(previousPostName)
.doOnNext(builder::previous)
.then(getByName(nextPostName))
.then(fetchByName(nextPostName))
.doOnNext(builder::next)
.thenReturn(builder);
})
@ -95,6 +96,14 @@ public class PostFinderImpl implements PostFinder {
.defaultIfEmpty(NavigationPostVo.empty());
}
private Mono<PostVo> fetchByName(String name) {
if (StringUtils.isBlank(name)) {
return Mono.empty();
}
return getByName(name)
.onErrorResume(ExtensionNotFoundException.class::isInstance, (error) -> Mono.empty());
}
@Override
public Flux<ListedPostVo> listAll() {
return client.list(Post.class, FIXED_PREDICATE, defaultComparator())