内容简介:Liquibase是数据库的源代码控制。更改日志Changelog:开发人员将基于文本的文件中的数据库更改日志存储在其本地开发计算机上,并将其应用于本地数据库。更改集ChangeSet:由“author”和“id”属性唯一标识。每个变更集通常都包含一个更改,该变更描述了要应用于数据库的更改/重构。
Liquibase是数据库的源代码控制。
更改日志Changelog:开发人员将基于文本的文件中的数据库更改日志存储在其本地开发计算机上,并将其应用于本地数据库。
更改集ChangeSet:由“author”和“id”属性唯一标识。每个变更集通常都包含一个更改,该变更描述了要应用于数据库的更改/重构。
这次我将向您展示如何将Liquibase添加到Spring Boot项目中。首先,您需要在build.gradle文件中添加Liquibase依赖项:
compile "org.liquibase:liquibase-core:3.5.3"
执行此命令以生成主更改日志:
liquibase --driver=com.mysql.jdbc.Driver --classpath=/${CONNECTOR_PATH}/mysql-connector-java-5.1.34.jar --changeLogFile=${PROJECT_PATH}/src/main/resources/db/changelog/db.changelog-master.yaml --url=jdbc:mysql://localhost:3306/db_name --username=username --password=password generateChangeLog
如果您使用的是Windowns计算机:
liquibase --driver=com.mysql.jdbc.Driver --classpath=C:\${CONNECTOR_PATH}\mysql-connector-java-5.1.34.jar --changeLogFile=C:\${PROJECT_PATH}\db\changelog\db.changelog-master.yaml --url=jdbc:mysql://localhost:3306/db_name --username=username--password=password generateChangeLog
上个命令将生成一个db.changelog-master.yaml文件。
databaseChangeLog: - changeSet: id: 1487128064865-1 author: josdem (generated) changes: - createTable: columns: - column: autoIncrement: true constraints: primaryKey: true name: id type: BIGINT - column: constraints: nullable: false name: date_created type: datetime(6) - column: constraints: nullable: false name: email type: VARCHAR(255) - column: constraints: nullable: false name: status type: INT - column: constraints: nullable: false name: token type: VARCHAR(255) tableName: registration_code - changeSet: id: 1487128064865-2 author: josdem (generated) changes: - createTable: columns: - column: autoIncrement: true constraints: primaryKey: true name: id type: BIGINT - column: constraints: nullable: false name: account_non_expired type: BIT(1) - column: constraints: nullable: false name: account_non_locked type: BIT(1) - column: constraints: nullable: false name: credentials_non_expired type: BIT(1) - column: constraints: nullable: false name: date_created type: datetime(6) - column: name: email type: VARCHAR(255) - column: constraints: nullable: false name: enabled type: BIT(1) - column: name: firstname type: VARCHAR(255) - column: name: lastname type: VARCHAR(255) - column: constraints: nullable: false name: password type: VARCHAR(255) - column: constraints: nullable: false name: role type: VARCHAR(255) - column: constraints: nullable: false name: username type: VARCHAR(255) tableName: user - changeSet: id: 1487128064865-3 author: josdem (generated) changes: - addUniqueConstraint: columnNames: username constraintName: UK_sb8bbouer5wak8vyiiy4pf2bx tableName: user
这是我目前使用Liquibase创建YAML文件的实体:
@Entity class User implements Serializable { @Id @GeneratedValue(strategy=AUTO) Long id @Column(unique = true, nullable = false) String username @Column(nullable = false) String password @Column(nullable = true) String firstname @Column(nullable = true) String lastname @Column(nullable = true) String email @Column(nullable = false) @Enumerated(STRING) Role role @Column(nullable = false) Boolean enabled = false @Column(nullable = false) Boolean accountNonExpired = true @Column(nullable = false) Boolean credentialsNonExpired = true @Column(nullable = false) Boolean accountNonLocked = true @Column(nullable = false) Date dateCreated = new Date() }
RegistrationCode.groovy
@Entity class RegistrationCode { @Id @GeneratedValue(strategy=AUTO) Long id @Column(nullable = false) String email @Column(nullable = false) Date dateCreated = new Date() @Column(nullable = false) String token = UUID.randomUUID().toString().replaceAll('-','') @Column(nullable = false) RegistrationCodeStatus status = RegistrationCodeStatus.VALID Boolean isValid(){ status == RegistrationCodeStatus.VALID ? true : false } }
Role.groovy
enum Role { USER,ADMIN }
就是这样,当您启动应用程序时,Liquibase将执行主更改日志并为您创建数据库架构。
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