Question

我正在使用嵌入式neo4j的SDN。我必须使用bean验证，但它不工作.null正在保存在数据库中，没有任何异常。

依赖是

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-grails-2.4"
    compile 'org.springframework.data:spring-data-neo4j:3.2.0.RELEASE'
    compile 'org.hibernate:hibernate-validator:4.3.1.Final'
    compile 'javax.validation:validation-api:1.0.0.GA'      
}

xml config is 

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:context="http://www.springframework.org/schema/context"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:neo4j="http://www.springframework.org/schema/data/neo4j"
xsi:schemaLocation="
http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans.xsd
http://www.springframework.org/schema/context
http://www.springframework.org/schema/context/spring-context.xsd
http://www.springframework.org/schema/data/neo4j
http://www.springframework.org/schema/data/neo4j/spring-neo4j.xsd">
<context:component-scan base-package="neo4j"></context:component-scan>
<neo4j:config
storeDirectory="target/db2"
base-package="neo4j"/>

<bean id="validator"
class="org.springframework.validation.beanvalidation.LocalValidatorFactoryBean"/>

<neo4j:repositories base-package="neo4j" />
</beans>

实体类

@NodeEntity
class Role {
    @GraphId Long graphId

    @NotNull
    String name;

}

控制器

@Transactional
    def saveUser(){

        println "in saveUser"
        Role role = new Role();
        Neo4jTemplate.save(role);

    }

我使用的是spring-data-neo4j 3.2.0.RELEASE

Answer 1

简介

?Spring Data Neo4j 6.x（您使用导入 spring-boot-starter-parent:2.4.x 的那个）删除了直接从域模型中创建约束的可能性< /strong>。

现在，这意味着您必须使用 Neo4j 的 Cypher 查询语言并执行您想做的事情（例如：CREATE CONSTRAINT notnull_name IF NOT EXISTS ON (role:Role) ASSERT EXISTS (role.name)）。

显然，这很难管理，因为您必须在应用程序启动之前执行脚本。并且对于生产环境来说很困难。

所以 Liquigraph 已经创建：它是一个工具，为我们执行脚本。

机制如下，我在 Github 上报告了这个 issue，它很好地解释了一切。

解决方案

? Pom.xml 依赖：

<dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-jdbc</artifactId> </dependency> <dependency> <groupId>org.neo4j</groupId> <artifactId>neo4j-jdbc-driver</artifactId> <version>4.0.1</version> </dependency> <dependency> <groupId>org.liquigraph</groupId> <artifactId>liquigraph-spring-boot-starter</artifactId> <version>4.0.2</version> </dependency>

? changelog.xml 文件（位于此处 -> {project_dir}/src/main/resources/db/liquigraph/changelog.xml）：

<?xml version="1.0" encoding="UTF-8"?> <changelog xmlns="http://www.liquigraph.org/schema/1.0/liquigraph.xsd"> <changeset id="constraints" author="you"> <query>CREATE CONSTRAINT notnull_name IF NOT EXISTS ON (role:Role) ASSERT EXISTS (role.name)</query> </changeset> </changelog>

? application.yml 属性：

spring: neo4j: uri: neo4j://localhost:7687 #neo4j+s if you use an HTTPS Neo4j instance authentication: username: neo4j password: neo4j datasource: #Liquigraph configuration used by Liquigraph POM dependency url: jdbc:neo4j:neo4j://localhost?encryption=false #encryption=true if you use an HTTPS Neo4j instance driver-class-name: org.neo4j.jdbc.boltrouting.BoltRoutingNeo4jDriver username: neo4j password: neo4j

✔️ ## 启动时，会创建以下约束##

特定日志：

2021-01-12 18:33:18.917 INFO 2420 --- [ main] com.zaxxer.hikari.HikariDataSource : HikariPool-1 - Starting... 2021-01-12 18:33:18.940 INFO 2420 --- [ main] Driver : Routing driver instance 706067443 created for server address localhost:7687 2021-01-12 18:33:21.510 INFO 2420 --- [ main] com.zaxxer.hikari.HikariDataSource : HikariPool-1 - Start completed. 2021-01-12 18:33:22.672 INFO 2420 --- [ main] o.l.core.io.ChangelogGraphWriter : Executing postcondition of changeset ID constraints by you 2021-01-12 18:33:22.775 INFO 2420 --- [ main] o.l.core.io.ChangelogGraphWriter : Changeset ID constraints by you was just executed

如您所见，您进入 changelog.xml 已被应用✔️。

Bean验证不起作用spring数据neo4j

1 个答案:

简介

解决方案