Question

我是laravel的新手，也是我学习的过程。我正在开发一个博客。在一个页面中，我将获得所有帖子以及针对每个帖子的评论总数。获取所有帖子的工作正常但是当我使用 withCount 方法时，它会给我错误。

public function posts() {
    $posts['posts'] = Post::with('comments') -> get();
    return view('dashboard.posts', $posts);
}

因为我是新手，所以我也搜索谷歌，但无法找到答案。请帮帮我。

这是错误

RelationNotFoundException in RelationNotFoundException.php line 20: Call to undefined relationship [comments] on model [App\Post].

Answer 1

我找到了答案，实际上我错过了评论模型，所以这里就是答案

在Post controller中

java.lang.NoClassDefFoundError: javax/ws/rs/client/RxInvokerProvider

    at org.glassfish.jersey.internal.inject.Providers.getJaxRsProviderInterfaces(Providers.java:114)
    at org.glassfish.jersey.internal.inject.Providers.<clinit>(Providers.java:87)
    at org.glassfish.jersey.internal.AbstractRuntimeDelegate.<init>(AbstractRuntimeDelegate.java:86)
    at org.glassfish.jersey.server.internal.RuntimeDelegateImpl.<init>(RuntimeDelegateImpl.java:64)
    at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
    at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)
    at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
    at java.lang.reflect.Constructor.newInstance(Constructor.java:422)
    at java.lang.Class.newInstance(Class.java:442)
    at javax.ws.rs.ext.FactoryFinder.newInstance(FactoryFinder.java:118)
    at javax.ws.rs.ext.FactoryFinder.find(FactoryFinder.java:166)
    at javax.ws.rs.ext.RuntimeDelegate.findDelegate(RuntimeDelegate.java:135)
    at javax.ws.rs.ext.RuntimeDelegate.getInstance(RuntimeDelegate.java:120)
    at javax.ws.rs.core.UriBuilder.newInstance(UriBuilder.java:95)
    at javax.ws.rs.core.UriBuilder.fromUri(UriBuilder.java:119)
    at org.glassfish.jersey.client.JerseyWebTarget.<init>(JerseyWebTarget.java:71)
    at org.glassfish.jersey.client.JerseyClient.target(JerseyClient.java:290)
    at org.glassfish.jersey.client.JerseyClient.target(JerseyClient.java:76)
    at WorkItems.getWorkItems(WorkItems.java:24)
    at WorkItemTests.Vsts_Test2(WorkItemTests.java:18)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:497)
    at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:50)
    at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)
    at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:47)
    at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:17)
    at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:325)
    at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:78)
    at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:57)
    at org.junit.runners.ParentRunner$3.run(ParentRunner.java:290)
    at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:71)
    at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:288)
    at org.junit.runners.ParentRunner.access$000(ParentRunner.java:58)
    at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:268)
    at org.junit.runners.ParentRunner.run(ParentRunner.java:363)
    at org.junit.runner.JUnitCore.run(JUnitCore.java:137)
    at com.intellij.junit4.JUnit4IdeaTestRunner.startRunnerWithArgs(JUnit4IdeaTestRunner.java:68)
    at com.intellij.rt.execution.junit.IdeaTestRunner$Repeater.startRunnerWithArgs(IdeaTestRunner.java:51)
    at com.intellij.rt.execution.junit.JUnitStarter.prepareStreamsAndStart(JUnitStarter.java:242)
    at com.intellij.rt.execution.junit.JUnitStarter.main(JUnitStarter.java:70)
Caused by: java.lang.ClassNotFoundException: javax.ws.rs.client.RxInvokerProvider
    at java.net.URLClassLoader.findClass(URLClassLoader.java:381)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
    at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:331)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
    ... 42 more


Process finished with exit code -1

在帖子模型中

$posts['posts'] = Post::withCount(['comments']) -> get();

Laravel withCount给出了错误

1 个答案: