无法将 Neo4j GORM 插件添加到 Grails 项目

Question

我想为我的 Grails 项目使用 Neo4j 图形数据库。我创建了一个新的 Grails 项目（我使用的是 Intellij Ultimate Edition）。该应用程序运行良好。当我尝试在我的 BuildConfig.groovy 中添加 Neo4j 依赖项（编译“：neo4j:2.0.0-M02”）并尝试更新项目时，我在控制台中收到以下错误：

Error |
Resolve error obtaining dependencies: Could not find artifact org.neo4j:neo4j-jdbc:jar:2.0.2 in grailsCentral (https://repo.grails.org/grails/plugins) (Use --stacktrace to see the full trace)
Error |
Resolve error obtaining dependencies: Could not find artifact org.neo4j:neo4j-jdbc:jar:2.0.2 in grailsCentral (https://repo.grails.org/grails/plugins) (Use --stacktrace to see the full trace)
Error |
Resolve error obtaining dependencies: Could not find artifact org.neo4j:neo4j-jdbc:jar:2.0.2 in grailsCentral (https://repo.grails.org/grails/plugins) (Use --stacktrace to see the full trace)
Error |
Could not find artifact org.neo4j:neo4j-jdbc:jar:2.0.2 in grailsCentral  (https://repo.grails.org/grails/plugins)
|Run 'grails dependency-report' for further information.

这是我的 BuildConfig.groovy:

grails.servlet.version = "3.0" // Change depending on target container compliance (2.5 or 3.0)
grails.project.class.dir = "target/classes"
grails.project.test.class.dir = "target/test-classes"
grails.project.test.reports.dir = "target/test-reports"
grails.project.work.dir = "target/work"
grails.project.target.level = 1.6
grails.project.source.level = 1.6
//grails.project.war.file = "target/${appName}-${appVersion}.war"

grails.project.fork = [
    // configure settings for compilation JVM, note that if you alter the Groovy version forked compilation is required
    //  compile: [maxMemory: 256, minMemory: 64, debug: false, maxPerm: 256, daemon:true],

    // configure settings for the test-app JVM, uses the daemon by default
    test: [maxMemory: 768, minMemory: 64, debug: false, maxPerm: 256, daemon:true],
    // configure settings for the run-app JVM
    run: [maxMemory: 768, minMemory: 64, debug: false, maxPerm: 256, forkReserve:false],
    // configure settings for the run-war JVM
    war: [maxMemory: 768, minMemory: 64, debug: false, maxPerm: 256, forkReserve:false],
    // configure settings for the Console UI JVM
    console: [maxMemory: 768, minMemory: 64, debug: false, maxPerm: 256]
]

grails.project.dependency.resolver = "maven" // or ivy
grails.project.dependency.resolution = {
    // inherit Grails' default dependencies
    inherits("global") {
        // specify dependency exclusions here; for example, uncomment this to disable ehcache:
        // excludes 'ehcache'
    }
    log "error" // log level of Ivy resolver, either 'error', 'warn', 'info', 'debug' or 'verbose'
    checksums true // Whether to verify checksums on resolve
    legacyResolve false // whether to do a secondary resolve on plugin installation, not advised and here for backwards compatibility

    repositories {
        inherits true // Whether to inherit repository definitions from plugins

        grailsPlugins()
        grailsHome()
        mavenLocal()
        grailsCentral()
        mavenCentral()
        // uncomment these (or add new ones) to enable remote dependency resolution from public Maven repositories
        //mavenRepo "http://repository.codehaus.org"
        //mavenRepo "http://download.java.net/maven/2/"
        //mavenRepo "http://repository.jboss.com/maven2/"
    }

    dependencies {
        // specify dependencies here under either 'build', 'compile', 'runtime', 'test' or 'provided' scopes e.g.
        // runtime 'mysql:mysql-connector-java:5.1.29'
        // runtime 'org.postgresql:postgresql:9.3-1101-jdbc41'
        test "org.grails:grails-datastore-test-support:1.0.2-grails-2.4"
    }

    plugins {
        // plugins for the build system only
        build ":tomcat:7.0.55"

        // plugins for the compile step
        compile ":neo4j:2.0.0-M02"
        compile ":scaffolding:2.1.2"
        compile ':cache:1.1.8'
        compile ":asset-pipeline:1.9.9"

        // plugins needed at runtime but not for compilation
        runtime ":hibernate4:4.3.6.1" // or ":hibernate:3.6.10.18"
        runtime ":database-migration:1.4.0"
        runtime ":jquery:1.11.1"

        // Uncomment these to enable additional asset-pipeline capabilities
        //compile ":sass-asset-pipeline:1.9.0"
        //compile ":less-asset-pipeline:1.10.0"
        //compile ":coffee-asset-pipeline:1.8.0"
        //compile ":handlebars-asset-pipeline:1.3.0.3"
    }
}

我什至尝试使用 'grails install-plugin neo4j' 命令安装它，但我得到了同样的错误。一些帮助会很好。 快速更新：如果我用'编译“：neo4j：2.0.0-M01”'替换依赖项'compile ":neo4j:2.0.0-M02"'它工作正常。所以我想这与最新版本有关。我希望有人可以向我解释为什么它不起作用。

部分解决：感谢 Burt Beckwith，我终于能够使这些依赖项工作。但是，当我运行该应用程序时，出现了另一个错误：

Error |
2015-01-02 13:25:59,826 [localhost-startStop-1] ERROR context.GrailsContextLoaderListener  - Error initializing the application: No bean named 'sessionFactory' is defined
Message: No bean named 'sessionFactory' is defined
    Line | Method
->>  104 | postProcessBeanFactory in org.grails.datastore.gorm.plugin.support.PersistenceContextInterceptorAggregator
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 
|    262 | run                    in java.util.concurrent.FutureTask
|   1145 | runWorker . . . . . .  in java.util.concurrent.ThreadPoolExecutor
|    615 | run                    in java.util.concurrent.ThreadPoolExecutor$Worker
^    745 | run . . . . . . . . .  in java.lang.Thread
Error |
Forked Grails VM exited with error

End: 最后一个错误与休眠插件有关。我去掉了，只剩下Neo4j了，app终于启动了。

Answer 1

错误告诉你它在 grailsCentral 中找不到依赖项 org.neo4j:neo4j-jdbc:jar:2.0.2 但这有点误导 - 这意味着它尝试了你在 [=13] 中列出的所有回购协议=] 并且无法在其中找到它，因此它报告它尝试的最后一个。

谷歌搜索 neo4j-jdbc maven 2.0.2 导致 https://mvnrepository.com/artifact/org.neo4j/neo4j-jdbc/2.0.2 which leads to http://m2.neo4j.org/releases/org/neo4j/neo4j-jdbc/2.0.2/ 并且那里有一个 neo4j-jdbc-2.0.2.jar。因此，向后工作并从 url 中删除版本、ID 和组，您需要添加此 repo url:

repositories {
   ...
   mavenRepo 'http://m2.neo4j.org/releases'
}

然后就解决了。

无法将 Neo4j GORM 插件添加到 Grails 项目

Unable to add Neo4j GORM plugin to a Grails project

grails

grails-orm

grails-plugin

neo4j