登录
当前位置： 首页 > 知识库问答 >
问题：

Corda持久性:未知实体:PersistentFungibleToken

巴宏恺
2023-03-14

日安！< br >我正在试用corda版令牌SDK 1.1版，并希望尝试发行/兑换自定义可替换令牌的各种方案。

我编写了一个简单的流程，描述了参与方自身的令牌颁发:< br >虽然非常基本的流程看起来工作得很好，但是在子流程(IssueTokensFlow)中，尝试将PersistentFungibleToken保存到数据库(下面是堆栈跟踪)。我试图实现自己的模式，但没有成功，因为函数supportedScema()只需要List。< br >我还尝试在不使用定制的FungilbeToken的情况下发行一些令牌，也没有成功。< br >如何解决这个问题？


import co.paralleluniverse.fibers.Suspendable
import com.maker.loyalty.states.NativeToken
import com.maker.loyalty.states.ParticipantNativeFungibleToken
import com.r3.corda.lib.tokens.contracts.states.FungibleToken
import com.r3.corda.lib.tokens.contracts.utilities.heldBy
import com.r3.corda.lib.tokens.contracts.utilities.of
import com.r3.corda.lib.tokens.workflows.flows.issue.IssueTokensFlow
import com.r3.corda.lib.tokens.workflows.utilities.getPreferredNotary
import net.corda.core.flows.*
import net.corda.core.identity.CordaX500Name
import net.corda.core.identity.Party
import net.corda.core.transactions.SignedTransaction
import net.corda.core.utilities.ProgressTracker

object IssueTokenExperiment {
    private fun tracker() = ProgressTracker(
            NotaryInfo,
            CreateTransaction,
            Verify,
            Finalize,
            ExchangeValuesSingleParty.ExecuteExchange,
            SigningByOtherParty
    )

    private const val defaultAmount: Long = 2
    private val otherPartyDefaultName = CordaX500Name(organisation = "PartyA", locality = "London", country = "GB")

    //Scenario - issue token onto the ledger, verify it was issued

    @InitiatingFlow
    @StartableByRPC
    /**
     * Issues token to self an notifies the counter party about issuance
     * */
    class IssueNativeTokenToSelfInitializer(private val amount: Long = defaultAmount,
                                            private val otherPartyX500Name: CordaX500Name = otherPartyDefaultName) : FlowLogic<SignedTransaction>() {

        override val progressTracker: ProgressTracker = tracker()

        @Suspendable
        override fun call(): SignedTransaction {
            progressTracker.currentStep = NotaryInfo
            getPreferredNotary(serviceHub)

            val otherParty: Party = run {
                serviceHub.networkMapCache.getPeerByLegalName(otherPartyX500Name)
                        ?: throw FlowException("Other party not found")
            }
            val otherPartySession = initiateFlow(otherParty)
            progressTracker.currentStep = CreateTransaction

            val issuedSupplyAmount = NativeToken issuedBy ourIdentity
            val supplyAmount = amount of issuedSupplyAmount
//            val liability = supplyAmount heldBy ourIdentity
            val participantNativeAccountState = ParticipantNativeFungibleToken(
                    amount = supplyAmount,
                    issuer = ourIdentity,
                    participants = listOf(ourIdentity, otherParty),
                    observers = emptyList(),
                    owner = ourIdentity
            )
            return subFlow(IssueTokensFlow(
                    token = participantNativeAccountState as FungibleToken,
                    participantSessions = listOf(otherPartySession)
            ))

        }
    }

}


java.lang.IllegalArgumentException: Unknown entity: com.r3.corda.lib.tokens.contracts.internal.schemas.PersistentFungibleToken
java.util.concurrent.ExecutionException: java.lang.IllegalArgumentException: Unknown entity: com.r3.corda.lib.tokens.contracts.internal.schemas.PersistentFungibleToken
    at java.util.concurrent.CompletableFuture.reportGet(CompletableFuture.java:357)
    at java.util.concurrent.CompletableFuture.get(CompletableFuture.java:1908)
    at net.corda.core.internal.concurrent.CordaFutureImpl.get(CordaFutureImpl.kt)
    at com.maker.loyalty.TwoPartyCoreTests.Create token test EXPERIMENT(TwoPartyCoreTests.kt:91)
    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:498)
    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.internal.runners.statements.RunBefores.evaluate(RunBefores.java:26)
    at org.junit.internal.runners.statements.RunAfters.evaluate(RunAfters.java:27)
    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$2.evaluate(ParentRunner.java:268)
    at org.junit.runners.ParentRunner.run(ParentRunner.java:363)
    at org.gradle.api.internal.tasks.testing.junit.JUnitTestClassExecutor.runTestClass(JUnitTestClassExecutor.java:110)
    at org.gradle.api.internal.tasks.testing.junit.JUnitTestClassExecutor.execute(JUnitTestClassExecutor.java:58)
    at org.gradle.api.internal.tasks.testing.junit.JUnitTestClassExecutor.execute(JUnitTestClassExecutor.java:38)
    at org.gradle.api.internal.tasks.testing.junit.AbstractJUnitTestClassProcessor.processTestClass(AbstractJUnitTestClassProcessor.java:62)
    at org.gradle.api.internal.tasks.testing.SuiteTestClassProcessor.processTestClass(SuiteTestClassProcessor.java:51)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:498)
    at org.gradle.internal.dispatch.ReflectionDispatch.dispatch(ReflectionDispatch.java:35)
    at org.gradle.internal.dispatch.ReflectionDispatch.dispatch(ReflectionDispatch.java:24)
    at org.gradle.internal.dispatch.ContextClassLoaderDispatch.dispatch(ContextClassLoaderDispatch.java:32)
    at org.gradle.internal.dispatch.ProxyDispatchAdapter$DispatchingInvocationHandler.invoke(ProxyDispatchAdapter.java:93)
    at com.sun.proxy.$Proxy2.processTestClass(Unknown Source)
    at org.gradle.api.internal.tasks.testing.worker.TestWorker.processTestClass(TestWorker.java:118)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:498)
    at org.gradle.internal.dispatch.ReflectionDispatch.dispatch(ReflectionDispatch.java:35)
    at org.gradle.internal.dispatch.ReflectionDispatch.dispatch(ReflectionDispatch.java:24)
    at org.gradle.internal.remote.internal.hub.MessageHubBackedObjectConnection$DispatchWrapper.dispatch(MessageHubBackedObjectConnection.java:175)
    at org.gradle.internal.remote.internal.hub.MessageHubBackedObjectConnection$DispatchWrapper.dispatch(MessageHubBackedObjectConnection.java:157)
    at org.gradle.internal.remote.internal.hub.MessageHub$Handler.run(MessageHub.java:404)
    at org.gradle.internal.concurrent.ExecutorPolicy$CatchAndRecordFailures.onExecute(ExecutorPolicy.java:63)
    at org.gradle.internal.concurrent.ManagedExecutorImpl$1.run(ManagedExecutorImpl.java:46)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
    at org.gradle.internal.concurrent.ThreadFactoryImpl$ManagedThreadRunnable.run(ThreadFactoryImpl.java:55)
    at java.lang.Thread.run(Thread.java:748)
Caused by: java.lang.IllegalArgumentException: Unknown entity: com.r3.corda.lib.tokens.contracts.internal.schemas.PersistentFungibleToken
    at org.hibernate.internal.SessionImpl.firePersist(SessionImpl.java:807)
    at org.hibernate.internal.SessionImpl.persist(SessionImpl.java:788)
    at net.corda.node.services.schema.PersistentStateService.persistStatesWithSchema$node(PersistentStateService.kt:48)
    at net.corda.node.services.schema.PersistentStateService.persist(PersistentStateService.kt:40)
    at net.corda.node.services.vault.NodeVaultService.processAndNotify(NodeVaultService.kt:393)
    at net.corda.node.services.vault.NodeVaultService.access$processAndNotify(NodeVaultService.kt:54)
    at net.corda.node.services.vault.NodeVaultService$notifyAll$1.invoke(NodeVaultService.kt:224)
    at net.corda.node.services.vault.NodeVaultService$notifyAll$2.invoke(NodeVaultService.kt:235)
    at net.corda.node.services.vault.NodeVaultService.notifyAll(NodeVaultService.kt:239)
    at net.corda.node.services.api.ServiceHubInternal$Companion$recordTransactions$1.invoke(ServiceHubInternal.kt:128)
    at net.corda.node.services.api.ServiceHubInternal$Companion$recordTransactions$1.invoke(ServiceHubInternal.kt:53)
    at net.corda.nodeapi.internal.persistence.CordaPersistence.transaction(CordaPersistence.kt:235)
    at net.corda.nodeapi.internal.persistence.CordaPersistence.transaction(CordaPersistence.kt:214)
    at net.corda.nodeapi.internal.persistence.CordaPersistence.transaction(CordaPersistence.kt:220)
    at net.corda.node.services.api.ServiceHubInternal$Companion.recordTransactions(ServiceHubInternal.kt:72)
    at net.corda.node.services.api.ServiceHubInternal$DefaultImpls.recordTransactions(ServiceHubInternal.kt:158)
    at net.corda.node.internal.AbstractNode$ServiceHubInternalImpl.recordTransactions(AbstractNode.kt:1008)
    at net.corda.core.node.ServiceHub$DefaultImpls.recordTransactions(ServiceHub.kt:214)
    at net.corda.core.internal.ServiceHubCoreInternal$DefaultImpls.recordTransactions(ServiceHubCoreInternal.kt)
    at net.corda.node.services.api.ServiceHubInternal$DefaultImpls.recordTransactions(ServiceHubInternal.kt)
    at net.corda.node.internal.AbstractNode$ServiceHubInternalImpl.recordTransactions(AbstractNode.kt:1008)
    at net.corda.core.node.ServiceHub$DefaultImpls.recordTransactions(ServiceHub.kt:206)
    at net.corda.core.internal.ServiceHubCoreInternal$DefaultImpls.recordTransactions(ServiceHubCoreInternal.kt)
    at net.corda.node.services.api.ServiceHubInternal$DefaultImpls.recordTransactions(ServiceHubInternal.kt)
    at net.corda.node.internal.AbstractNode$ServiceHubInternalImpl.recordTransactions(AbstractNode.kt:1008)
    at net.corda.core.flows.FinalityFlow.notariseAndRecord(FinalityFlow.kt:205)
    at net.corda.core.flows.FinalityFlow.call(FinalityFlow.kt:147)
    at net.corda.core.flows.FinalityFlow.call(FinalityFlow.kt:39)
    at net.corda.node.services.statemachine.FlowStateMachineImpl.subFlow(FlowStateMachineImpl.kt:330)
    at net.corda.core.flows.FlowLogic.subFlow(FlowLogic.kt:326)
    at com.r3.corda.lib.tokens.workflows.internal.flows.finality.ObserverAwareFinalityFlow.call(ObserverAwareFinalityFlow.kt:75)
    at com.r3.corda.lib.tokens.workflows.internal.flows.finality.ObserverAwareFinalityFlow.call(ObserverAwareFinalityFlow.kt:35)
    at net.corda.node.services.statemachine.FlowStateMachineImpl.subFlow(FlowStateMachineImpl.kt:330)
    at net.corda.core.flows.FlowLogic.subFlow(FlowLogic.kt:326)
    at com.r3.corda.lib.tokens.workflows.flows.issue.IssueTokensFlow.call(IssueTokensFlow.kt:84)
    at com.r3.corda.lib.tokens.workflows.flows.issue.IssueTokensFlow.call(IssueTokensFlow.kt:46)
    at net.corda.node.services.statemachine.FlowStateMachineImpl.subFlow(FlowStateMachineImpl.kt:330)
    at net.corda.core.flows.FlowLogic.subFlow(FlowLogic.kt:326)
    at com.maker.loyalty.flows.IssueTokenExperiment$IssueNativeTokenToSelfInitializer.call(IssueTokenExperiment.kt:64)
    at com.maker.loyalty.flows.IssueTokenExperiment$IssueNativeTokenToSelfInitializer.call(IssueTokenExperiment.kt:37)
    at net.corda.node.services.statemachine.FlowStateMachineImpl.run(FlowStateMachineImpl.kt:270)
    at net.corda.node.services.statemachine.FlowStateMachineImpl.run(FlowStateMachineImpl.kt:46)
    at co.paralleluniverse.fibers.Fiber.run1(Fiber.java:1092)
    at co.paralleluniverse.fibers.Fiber.exec(Fiber.java:788)
    at co.paralleluniverse.fibers.RunnableFiberTask.doExec(RunnableFiberTask.java:100)
    at co.paralleluniverse.fibers.RunnableFiberTask.run(RunnableFiberTask.java:91)
    at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
    at java.util.concurrent.FutureTask.run(FutureTask.java:266)
    at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
    at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
    at net.corda.node.utilities.AffinityExecutor$ServiceAffinityExecutor$1$thread$1.run(AffinityExecutor.kt:63)

import com.maker.loyalty.contracts.ParticipantNativeAccountContract
import com.maker.loyalty.schemas.ParticipantNativeTokenSchemaV1
import com.r3.corda.lib.tokens.contracts.internal.schemas.FungibleTokenSchema
import com.r3.corda.lib.tokens.contracts.internal.schemas.FungibleTokenSchemaV1
import com.r3.corda.lib.tokens.contracts.internal.schemas.PersistentFungibleToken
import com.r3.corda.lib.tokens.contracts.states.FungibleToken
import com.r3.corda.lib.tokens.contracts.types.IssuedTokenType
import com.r3.corda.lib.tokens.contracts.types.TokenType
import net.corda.core.contracts.Amount
import net.corda.core.contracts.BelongsToContract
import net.corda.core.identity.AbstractParty
import net.corda.core.identity.Party
import net.corda.core.schemas.MappedSchema
import net.corda.core.schemas.PersistentState
import net.corda.core.schemas.QueryableState
import net.corda.core.serialization.CordaSerializable
import java.util.*

@BelongsToContract(ParticipantNativeAccountContract::class)
data class ParticipantNativeFungibleToken(override val amount: Amount<IssuedTokenType>,
                                          override val issuer: Party,
                                          val owner: Party,
                                          val observers: List<AbstractParty> = listOf(),
                                          override val participants: List<AbstractParty> = (mutableListOf(owner, issuer) + observers)
) : FungibleToken(amount, issuer), QueryableState {
    override fun generateMappedObject(schema: MappedSchema): PersistentState {
        return when (schema) {
            is FungibleTokenSchemaV1 -> PersistentFungibleToken(
                    issuer = issuer,
                    tokenIdentifier = amount.token.tokenIdentifier,
                    holder = owner,
                    tokenClass = amount.token.tokenClass,
                    amount = amount.quantity
            )
//            is ParticipantNativeTokenSchemaV1 -> ParticipantNativeTokenSchemaV1.PersistentParticipantNativeToken(
//                    issuer = issuer,
//                    tokenIdentifier = amount.token.tokenIdentifier,
//                    holder = owner,
//                    tokenClass = amount.token.tokenClass,
//                    amount = amount.quantity
//            )
            else -> throw IllegalArgumentException("Unrecognised schema $schema")
        }
    }

    override fun supportedSchemas() = listOf(FungibleTokenSchemaV1)

    override fun equals(other: Any?): Boolean {
        if (this === other) return true
        if (javaClass != other?.javaClass) return false
        other as ParticipantNativeFungibleToken
        if (amount != other.amount) return false
        if (holder != other.holder) return false
        if (tokenTypeJarHash != other.tokenTypeJarHash) return false
        return true
    }

    override fun hashCode(): Int {
        var result = amount.hashCode()
        result = 31 * result + holder.hashCode()
        result = 31 * result + (tokenTypeJarHash?.hashCode() ?: 0)
        return result
    }
}

    @Test
    fun `Issue token for self and notify the other party`() {
        val resultFuture = a.startFlow(IssueTokenExperiment.IssueNativeTokenToSelfInitializer(
                amount = 10L,
                otherPartyX500Name = bNodeName
        ))
        network.runNetwork()
        val res = resultFuture.get()
        assertNotNull(res)
    }

    @Before
    fun setup() {
        network.runNetwork()
        setupClients()
        addBonusToClientAccount()
    }

    @After
    fun tearDown() = network.stopNodes()

    private fun setupClients() {
        a.startFlow(ClientAccountFlows.InitiateClientAccountCreation(person = defaultPerson))
        b.startFlow(ClientAccountFlows.InitiateClientAccountCreation(person = defaultPerson))
        network.runNetwork()
    }

    private fun addBonusToClientAccount() {
        a.startFlow(ClientAccountFlows.AddBonusToClientAccount(person = defaultPerson, addedBonus = 100L))
        b.startFlow(ClientAccountFlows.AddBonusToClientAccount(person = defaultPerson, addedBonus = 100L))
        network.runNetwork()
    }

apply plugin: 'net.corda.plugins.cordapp'
apply plugin: 'net.corda.plugins.quasar-utils'

cordapp {
    targetPlatformVersion corda_platform_version
    minimumPlatformVersion corda_platform_version
    workflow {
        name "Loyalty Flows"
        versionId 1
    }
}

sourceSets {
    main {
        resources {
            srcDir rootProject.file("config/dev")
        }
    }
    test {
        resources {
            srcDir rootProject.file("config/test")
        }
    }
    integrationTest {
        kotlin {
            compileClasspath += main.output + test.output
            runtimeClasspath += main.output + test.output
            srcDir file('src/integrationTest/kotlin')
        }
    }
}

repositories {
    maven { url 'https://ci-artifactory.corda.r3cev.com/artifactory/corda-lib' }
    maven { url 'https://ci-artifactory.corda.r3cev.com/artifactory/corda-lib-dev' }
}

configurations {
    integrationTestCompile.extendsFrom testCompile
    integrationTestRuntime.extendsFrom testRuntime
}

dependencies {
    compile "org.jetbrains.kotlin:kotlin-stdlib-jdk8:$kotlin_version"
    testCompile "org.jetbrains.kotlin:kotlin-test:$kotlin_version"
    testCompile "junit:junit:$junit_version"

    // Corda dependencies.
    cordaCompile "$corda_release_group:corda-core:$corda_release_version"
    cordaRuntime "$corda_release_group:corda:$corda_release_version"
    cordaCompile "$tokens_release_group:tokens-workflows:$tokens_release_version"
    testCompile "$corda_release_group:corda-node-driver:$corda_release_version"
    //tokens sdk
    cordaCompile "$tokens_release_group:tokens-workflows:$tokens_release_version"
    cordaCompile "$tokens_release_group:tokens-money:$tokens_release_version"
    cordapp "$tokens_release_group:tokens-selection:$tokens_release_version"

    // CorDapp dependencies.
    cordapp project(":contracts")
}

task integrationTest(type: Test, dependsOn: []) {
    testClassesDirs = sourceSets.integrationTest.output.classesDirs
    classpath = sourceSets.integrationTest.runtimeClasspath
}

共有1个答案

阎宾实
2023-03-14

您可能忘记在节点定义中（即在根 build.gradle 文件中的 deployNodes 任务内部）包含令牌合约依赖项（错误消息中提到的缺少自定义架构类）。

添加这一行:

cordapp("$tokens_release_group:tokens-contracts:$tokens_release_version")

请记住，在契约测试的MockService和流测试的MockNetwork中也要包括这种依赖关系：

// Contract tests.
private final MockServices ledgerServices = new MockServices(
            Collections.singletonList("com.r3.corda.lib.tokens.contracts"));    

// Flow tests.
private final MockNetwork network = new MockNetwork(new MockNetworkParameters()
            .withCordappsForAllNodes(ImmutableList.of(                
                TestCordapp.findCordapp("com.r3.corda.lib.tokens.contracts"),
 类似资料：
  • JPA-容器管理的持久性不持久化实体-JTA

    我试图集成Spring和JSF，我坚持使用对象。我不想处理事务（begin-commit等） 经过一些谷歌，我可以找到一个答案，给我需要在这个链接 我使用eclipselink作为ORM和Oracle 11g数据库，并使用带有Maven的Glassfish Server3.1。我更喜欢Spring配置的注释。我用 相关类中的注释。我的名称是E_DefterManagementPU，我的事务类型是J

  • “基本”属性类型不应是持久性实体

    我正在引用另一个实体类中的实体，并出现此错误。下面是示例代码。我有这些课程在坚持。还有xml。 是什么导致了这个问题？我正在使用Spring数据JPA和Hibernate。

  • 当持久性单元处于EAR级别时，未映射实体

    我需要一个EAR java应用程序，在其中我可以定义一个持久性单元，并在不同的组件中使用该持久性单元。例如:我在我的application.xml中定义了两个JAR:my-product . JAR和my-product-module . JAR——这两个JAR文件应该能够使用同一个PersistenceUnit。这个PersistenceUnit是在一个单独的jar中定义的，这个jar是我的EA

  • org.hibernate.MappingException：未知实体

    问题内容： 我正在尝试入门Hibernate 2nd Edition，而我一直试图将简单的工作示例与HSQLDB结合在一起。 当我跑步时，我得到 这是我得到的： Message.java PopulateMessages.java build.properties hibernate.cfg.xml build.xml 问题答案： 您的实体注释不正确， 必须 使用注释。您可以使用Hibernate

  • org.hibernate.MappingException：未知实体：

    问题内容： 我真的很想了解我的代码发生了什么。 我有一个独立的应用程序，它使用spring和Hibernate作为JPA，我正在尝试使用单个主类运行测试 我的主班 我的应用程序上下文是： 我的用户模型是： 我的DAO是： 这是我运行程序时出现的我的stacktrace错误： 问题答案： 您必须在会话工厂配置中列出您的类。如果使用，则可以自动发现实体。 为了在hibernate和spring中使用注

  • java.lang.IllegalArgumentException：未知实体

    我有一个测试车， 而applicatin.xml是 但它报告异常 java.lang.IllegalArgumentException：未知实体：com.chinalbs.entity.conductor（位于org.hibernate.ejb.abstractentyManagerImpl.persist(abstractentyManagerImpl.java:842)（位于sun.refle

相关问答

间歇性错误org.hibernate.持久性对象异常：传递给持久性的分离实体“多对一”属性类型不应为“持久性实体”级联持久性中“字段列表”中的未知列org.hibernate.MappingException：未知实体：Library.Model.PersonInvalidDataAccessapiUsageException：未知实体：UserWithRoles

相关文章

Python ElementTree支持解析未知的XML实体吗？通过引用未知目标实体属性Hibernate / JPA注释-未知实体Hibernate @ManyToOne引用未知实体Hibernate-回滚：org.hibernate.MappingException：未知实体

相关阅读

JPA级联持久化数据持久化存储Redis 的大 Key 对持久化的影响JavaScript性能优化具体实现-第二篇JavaScript性能优化具体实现-第一篇

相关工具

Cordaios所支持的所有字体AMI通知知雨天气知乎小报

相关文档

Databricks Spark 知识库简体中文版知识图谱：方法、实践与应用Databricks Spark 知识库Git 知识大全JavaScript 基础知识
快捷导航： 新手教程 算法原理 架构设计 Java进阶 数据库进阶 大厂专栏 面试经验 编程笔记 编程问答 所有专题 文档资料 工具软件 电子书籍 小牛导航
在线工具： 房贷计算器 个税计算器 Linux命令查询 Json格式化 正则表达式 颜色转换 AES加解密 SHA1加密 MD5加密 毒鸡汤 字数统计 随机密码生成 进制转换 Base64编解码 励志句子
Copyright © 2019-2024 小牛知识库@xnip.cn. All Rights Reserved.