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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