Node.js 将迁移更改列续写为FK,然后撤消失败
我正在尝试创建迁移文件,以将changeColumn转换为string(来自enum)并引用其他表Node.js 将迁移更改列续写为FK,然后撤消失败,node.js,mariadb,sequelize.js,Node.js,Mariadb,Sequelize.js,我正在尝试创建迁移文件,以将changeColumn转换为string(来自enum)并引用其他表 const enumStatus = ['PENDING', 'SUCCESSFUL', 'FAILED', 'FAILED_LAST_VALUE_MISSING', 'FAILED_LAST_DATE_MISSING', 'FAILED_OLD_LAST_DATE']; module.exports = { up: async(queryInterface, Sequelize) =>
const enumStatus = ['PENDING', 'SUCCESSFUL', 'FAILED', 'FAILED_LAST_VALUE_MISSING', 'FAILED_LAST_DATE_MISSING', 'FAILED_OLD_LAST_DATE'];
module.exports = {
up: async(queryInterface, Sequelize) => {
return Promise.all([
queryInterface.changeColumn('MeasurementTestResults', 'status', {
type: Sequelize.STRING,
allowNull: false
}), queryInterface.addConstraint('MeasurementTestResults', {
fields: ['status'],
type: 'foreign key',
name: 'statusFk',
references: {
table: 'MeasurementTestResultStatusEnums',
field: 'code'
},
onDelete: 'cascade',
onUpdate: 'cascade'
})
]);
},
down: async(queryInterface, Sequelize) => {
return Promise.all([
queryInterface.removeConstraint('MeasurementTestResults', 'statusFk'),
queryInterface.changeColumn('MeasurementTestResults', 'status', {
type: Sequelize.ENUM(...enumStatus),
allowNull: false
})
]);
}
};
db:migrate运行得很完美,但当我尝试调用db:migrate:undo时,它会无序执行命令吗
== 20201217194748-measurementTestResult_changeColumn_status: reverting =======
Executing (default): SELECT CONSTRAINT_CATALOG AS constraintCatalog, CONSTRAINT_NAME AS constraintName, CONSTRAINT_SCHEMA AS constraintSchema, CONSTRAINT_TYPE AS constraintType, TABLE_NAME AS tableName, TABLE_SCHEMA AS tableSchema from INFORMATION_SCHEMA.TABLE_CONSTRA
INTS WHERE table_name='MeasurementTestResults' AND constraint_name = 'statusFk' AND TABLE_SCHEMA = 'iot_crcm_application_data1';
Executing (default): ALTER TABLE `MeasurementTestResults` CHANGE `status` `status` ENUM('PENDING', 'SUCCESSFUL', 'FAILED', 'FAILED_LAST_VALUE_MISSING', 'FAILED_LAST_DATE_MISSING', 'FAILED_OLD_LAST_DATE') NOT NULL;
Executing (default): ALTER TABLE `MeasurementTestResults`
DROP FOREIGN KEY `statusFk`;
ERROR: (conn=143438, no: 1832, SQLState: HY000) Cannot change column 'status': used in a foreign key constraint 'statusFk'
sql: ALTER TABLE `MeasurementTestResults` CHANGE `status` `status` ENUM('PENDING', 'SUCCESSFUL', 'FAILED', 'FAILED_LAST_VALUE_MISSING', 'FAILED_LAST_DATE_MISSING', 'FAILED_OLD_LAST_DATE') NOT NULL; - parameters:[]
然后,当我尝试删除
queryInterface.removeConstraint('measurementestresults','statusFk'),
这一行从down脚本中删除时,它可以工作,但在我错误地尝试它之前不能…不要尝试使用Promise.all并行执行相互依赖的结构更改。你最好一个接一个地给他们打电话:
等待queryInterface.removeConstraint('MeasurementSetResults','statusFk')
等待queryInterface.changeColumn('MeasurementTestResults','status','{
类型:Sequelize.ENUM(…enumStatus),
allowNull:错误
})
up
方法也是如此。非常简单,但非常有效,感谢您的支持。这对我来说是非常新的,这是我的第一个自上而下的脚本。如果MariaDB支持结构更改,请不要忘记添加事务。好的,谢谢提醒。行