Mysql Sequelize-模型和迁移
[已解决!] 我在网上做了很多研究,发现了一些与我类似的问题。但是,我找不到解决问题的正确方法。请帮忙 我正在使用续集v6。我在使用模型和迁移时遇到了一些麻烦 我所做的: 我使用sequelize cli生成了角色模型。它在Mysql Sequelize-模型和迁移,mysql,node.js,model,migration,sequelize.js,Mysql,Node.js,Model,Migration,Sequelize.js,[已解决!] 我在网上做了很多研究,发现了一些与我类似的问题。但是,我找不到解决问题的正确方法。请帮忙 我正在使用续集v6。我在使用模型和迁移时遇到了一些麻烦 我所做的: 我使用sequelize cli生成了角色模型。它在models/role.js中给出了下面的代码 "use strict"; const { Model } = require("sequelize"); module.exports = (sequelize, DataTypes)
models/role.js
中给出了下面的代码
"use strict";
const { Model } = require("sequelize");
module.exports = (sequelize, DataTypes) => {
class Role extends Model {
static associate(models) {
// define association here
}
}
Role.init(
{
name: DataTypes.STRING,
description: DataTypes.STRING, },
{
sequelize,
modelName: "roles",
}
);
return Role;
};
"use strict";
module.exports = {
up: async (queryInterface, Sequelize) => {
await queryInterface.createTable(
"roles", // <- I've changed this from Roles to roles because I want the MySQL convention.
{
roleId: {
allowNull: false,
autoIncrement: true,
field: "role_id",
primaryKey: true,
type: Sequelize.INTEGER,
},
name: {
allowNull: false,
type: Sequelize.STRING(30),
},
description: {
type: Sequelize.STRING(50),
},
createdAt: {
allowNull: false,
field: "created_at",
type: Sequelize.DATE,
},
updatedAt: {
allowNull: false,
field: "updated_at",
type: Sequelize.DATE,
},
},
{
underscored: true,
}
);
},
down: async (queryInterface, Sequelize) => {
await queryInterface.dropTable("roles");
},
};
我还在migrations/timestamp create role.js
中获得了该模型的migration文件
"use strict";
const { Model } = require("sequelize");
module.exports = (sequelize, DataTypes) => {
class Role extends Model {
static associate(models) {
// define association here
}
}
Role.init(
{
name: DataTypes.STRING,
description: DataTypes.STRING, },
{
sequelize,
modelName: "roles",
}
);
return Role;
};
"use strict";
module.exports = {
up: async (queryInterface, Sequelize) => {
await queryInterface.createTable(
"roles", // <- I've changed this from Roles to roles because I want the MySQL convention.
{
roleId: {
allowNull: false,
autoIncrement: true,
field: "role_id",
primaryKey: true,
type: Sequelize.INTEGER,
},
name: {
allowNull: false,
type: Sequelize.STRING(30),
},
description: {
type: Sequelize.STRING(50),
},
createdAt: {
allowNull: false,
field: "created_at",
type: Sequelize.DATE,
},
updatedAt: {
allowNull: false,
field: "updated_at",
type: Sequelize.DATE,
},
},
{
underscored: true,
}
);
},
down: async (queryInterface, Sequelize) => {
await queryInterface.dropTable("roles");
},
};
我不好的地方
通过上面的实现,我在控制台上得到了这个错误
Executing (default): SELECT `id`, `name`, `description`, `createdAt`, `updatedAt` FROM `roles` AS `roles`;
SequelizeDatabaseError: Unknown column 'id' in 'field list'
at Query.formatError (/home/hello-world/Thesis/SMS-API/node_modules/sequelize/lib/dialects/mysql/query.js:239:16)
at Query.run (/home/hello-world/Thesis/SMS-API/node_modules/sequelize/lib/dialects/mysql/query.js:54:18)
at processTicksAndRejections (internal/process/task_queues.js:97:5)
at async /home/hello-world/Thesis/SMS-API/node_modules/sequelize/lib/sequelize.js:619:16
at async MySQLQueryInterface.select (/home/hello-world/Thesis/SMS-API/node_modules/sequelize/lib/dialects/abstract/query-interface.js:938:12)
at async Function.findAll (/home/hello-world/Thesis/SMS-API/node_modules/sequelize/lib/model.js:1741:21)
at async /home/hello-world/Thesis/SMS-API/src/controllers/roles.js:5:17
at async /home/hello-world/Thesis/SMS-API/src/middlewares/catchAsync.js:4:7
另一次尝试
我修改了models/role.js
如下
Role.init(
{
role_id: {
allowNull: false,
autoIncrement: true,
primaryKey: true,
type: DataTypes.INTEGER,
},
name: DataTypes.STRING,
description: DataTypes.STRING,
created_at: DataTypes.DATE,
updated_at: DataTypes.DATE,
}
下一次尝试,下一次错误
通过上述修改,我得到了新的错误
Executing (default): SELECT `role_id`, `name`, `description`, `created_at`, `updated_at`, `createdAt`, `updatedAt` FROM `roles` AS `roles`;
SequelizeDatabaseError: Unknown column 'createdAt' in 'field list'
at Query.formatError (/home/hello-world/Thesis/SMS-API/node_modules/sequelize/lib/dialects/mysql/query.js:239:16)
at Query.run (/home/hello-world/Thesis/SMS-API/node_modules/sequelize/lib/dialects/mysql/query.js:54:18)
at processTicksAndRejections (internal/process/task_queues.js:97:5)
at async /home/hello-world/Thesis/SMS-API/node_modules/sequelize/lib/sequelize.js:619:16
at async MySQLQueryInterface.select (/home/hello-world/Thesis/SMS-API/node_modules/sequelize/lib/dialects/abstract/query-interface.js:938:12)
at async Function.findAll (/home/hello-world/Thesis/SMS-API/node_modules/sequelize/lib/model.js:1741:21)
at async /home/hello-world/Thesis/SMS-API/src/controllers/roles.js:5:17
at async /home/hello-world/Thesis/SMS-API/src/middlewares/catchAsync.js:4:7
帮助
我已经尝试了很多方法,但都不能解决我的问题。所以,请帮忙。我需要MySQL级别的MySQL命名约定,即下划线,以及代码级别的JavaScript命名约定
非常感谢。我已经解决了我的问题。我现在可以为它们的特定世界使用每种命名约定:对于MySQL,在_score下使用;对于JavaScript,使用camelCase
所以这里我写了我的解决方案,如果有人在未来遇到同样的问题
我正在使用sequelize cli
创建迁移、模型和种子。你可以查一下
迁移
迁移只负责创建/更改/删除表和列仅使用数据库进行It访问。
migrations/timestamp create role table.js
const Role = require("../models").roles;
const catchAsync = require("../middlewares/catchAsync");
exports.findAll = catchAsync(async (req, res) => {
const roles = await Role.findAll();
return res.status(200).json({
status: "success",
data: {
roles,
},
});
});
"use strict";
module.exports = {
up: async (queryInterface, Sequelize) => {
await queryInterface.createTable("roles", {
roleId: {
allowNull: false,
autoIncrement: true,
field: "role_id",
primaryKey: true,
type: Sequelize.INTEGER,
},
name: {
allowNull: false,
type: Sequelize.STRING(30),
},
description: {
type: Sequelize.STRING(50),
},
createdAt: {
allowNull: false,
field: "created_at",
type: Sequelize.DATE,
},
updatedAt: {
allowNull: false,
field: "updated_at",
type: Sequelize.DATE,
},
});
},
down: async (queryInterface, Sequelize) => {
await queryInterface.dropTable("roles");
},
};
"use strict";
const roles = [
"official",
"office",
"admin"
].map((role) => {
return {
name: role,
created_at: new Date(),
updated_at: new Date(),
};
});
module.exports = {
up: async (queryInterface, Sequelize) => {
await queryInterface.bulkInsert("roles", roles);
},
down: async (queryInterface, Sequelize) => {
await queryInterface.bulkDelete("roles", null, {});
},
};
"use strict";
const { Model } = require("sequelize");
module.exports = (sequelize, DataTypes) => {
class Role extends Model {
static associate(models) {
// define association here
}
}
Role.init(
{
roleId: {
allowNull: false,
autoIncrement: true,
field: "role_id", // SELECT role_id AS id
primaryKey: true,
type: DataTypes.INTEGER,
},
name: DataTypes.STRING,
description: DataTypes.STRING,
createdAt: {
type: DataTypes.DATE,
field: "created_at",
},
updatedAt: {
type: DataTypes.DATE,
field: "updated_at",
},
},
{
sequelize,
tableName: "roles",
modelName: "Role",
}
);
return Role;
};
const models = require("../models");
const catchAsync = require("../middlewares/catchAsync");
exports.findAll = catchAsync(async (req, res) => {
const roles = await models.Role.findAll();
/*
you can access
- role_id from db with roleId in JS
- created_at from db with createdAt in JS
*/
return res.status(200).json({
status: "success",
data: {
roles,
},
});
});
通过运行上述迁移脚本,我在物理数据库中获得了包含以下列的roles
表。
角色标识、名称、描述、创建时间、更新时间
播种机
Seeder将用初始测试数据填充您的表。我已经填写了我的角色
表格,如下所示
Role.init(
{
role_id: {
allowNull: false,
autoIncrement: true,
primaryKey: true,
type: DataTypes.INTEGER,
},
name: DataTypes.STRING,
description: DataTypes.STRING,
created_at: DataTypes.DATE,
updated_at: DataTypes.DATE,
}
seeders/timestamp角色表seeder.js
const Role = require("../models").roles;
const catchAsync = require("../middlewares/catchAsync");
exports.findAll = catchAsync(async (req, res) => {
const roles = await Role.findAll();
return res.status(200).json({
status: "success",
data: {
roles,
},
});
});
"use strict";
module.exports = {
up: async (queryInterface, Sequelize) => {
await queryInterface.createTable("roles", {
roleId: {
allowNull: false,
autoIncrement: true,
field: "role_id",
primaryKey: true,
type: Sequelize.INTEGER,
},
name: {
allowNull: false,
type: Sequelize.STRING(30),
},
description: {
type: Sequelize.STRING(50),
},
createdAt: {
allowNull: false,
field: "created_at",
type: Sequelize.DATE,
},
updatedAt: {
allowNull: false,
field: "updated_at",
type: Sequelize.DATE,
},
});
},
down: async (queryInterface, Sequelize) => {
await queryInterface.dropTable("roles");
},
};
"use strict";
const roles = [
"official",
"office",
"admin"
].map((role) => {
return {
name: role,
created_at: new Date(),
updated_at: new Date(),
};
});
module.exports = {
up: async (queryInterface, Sequelize) => {
await queryInterface.bulkInsert("roles", roles);
},
down: async (queryInterface, Sequelize) => {
await queryInterface.bulkDelete("roles", null, {});
},
};
"use strict";
const { Model } = require("sequelize");
module.exports = (sequelize, DataTypes) => {
class Role extends Model {
static associate(models) {
// define association here
}
}
Role.init(
{
roleId: {
allowNull: false,
autoIncrement: true,
field: "role_id", // SELECT role_id AS id
primaryKey: true,
type: DataTypes.INTEGER,
},
name: DataTypes.STRING,
description: DataTypes.STRING,
createdAt: {
type: DataTypes.DATE,
field: "created_at",
},
updatedAt: {
type: DataTypes.DATE,
field: "updated_at",
},
},
{
sequelize,
tableName: "roles",
modelName: "Role",
}
);
return Role;
};
const models = require("../models");
const catchAsync = require("../middlewares/catchAsync");
exports.findAll = catchAsync(async (req, res) => {
const roles = await models.Role.findAll();
/*
you can access
- role_id from db with roleId in JS
- created_at from db with createdAt in JS
*/
return res.status(200).json({
status: "success",
data: {
roles,
},
});
});
型号
在我创建了表并填充了初始数据之后,我需要创建Role
model,以便用作MySQL和JavaScript之间的桥梁
models/role.js
const Role = require("../models").roles;
const catchAsync = require("../middlewares/catchAsync");
exports.findAll = catchAsync(async (req, res) => {
const roles = await Role.findAll();
return res.status(200).json({
status: "success",
data: {
roles,
},
});
});
"use strict";
module.exports = {
up: async (queryInterface, Sequelize) => {
await queryInterface.createTable("roles", {
roleId: {
allowNull: false,
autoIncrement: true,
field: "role_id",
primaryKey: true,
type: Sequelize.INTEGER,
},
name: {
allowNull: false,
type: Sequelize.STRING(30),
},
description: {
type: Sequelize.STRING(50),
},
createdAt: {
allowNull: false,
field: "created_at",
type: Sequelize.DATE,
},
updatedAt: {
allowNull: false,
field: "updated_at",
type: Sequelize.DATE,
},
});
},
down: async (queryInterface, Sequelize) => {
await queryInterface.dropTable("roles");
},
};
"use strict";
const roles = [
"official",
"office",
"admin"
].map((role) => {
return {
name: role,
created_at: new Date(),
updated_at: new Date(),
};
});
module.exports = {
up: async (queryInterface, Sequelize) => {
await queryInterface.bulkInsert("roles", roles);
},
down: async (queryInterface, Sequelize) => {
await queryInterface.bulkDelete("roles", null, {});
},
};
"use strict";
const { Model } = require("sequelize");
module.exports = (sequelize, DataTypes) => {
class Role extends Model {
static associate(models) {
// define association here
}
}
Role.init(
{
roleId: {
allowNull: false,
autoIncrement: true,
field: "role_id", // SELECT role_id AS id
primaryKey: true,
type: DataTypes.INTEGER,
},
name: DataTypes.STRING,
description: DataTypes.STRING,
createdAt: {
type: DataTypes.DATE,
field: "created_at",
},
updatedAt: {
type: DataTypes.DATE,
field: "updated_at",
},
},
{
sequelize,
tableName: "roles",
modelName: "Role",
}
);
return Role;
};
const models = require("../models");
const catchAsync = require("../middlewares/catchAsync");
exports.findAll = catchAsync(async (req, res) => {
const roles = await models.Role.findAll();
/*
you can access
- role_id from db with roleId in JS
- created_at from db with createdAt in JS
*/
return res.status(200).json({
status: "success",
data: {
roles,
},
});
});
从JavaScript获取角色
controllers/roles.js
const Role = require("../models").roles;
const catchAsync = require("../middlewares/catchAsync");
exports.findAll = catchAsync(async (req, res) => {
const roles = await Role.findAll();
return res.status(200).json({
status: "success",
data: {
roles,
},
});
});
"use strict";
module.exports = {
up: async (queryInterface, Sequelize) => {
await queryInterface.createTable("roles", {
roleId: {
allowNull: false,
autoIncrement: true,
field: "role_id",
primaryKey: true,
type: Sequelize.INTEGER,
},
name: {
allowNull: false,
type: Sequelize.STRING(30),
},
description: {
type: Sequelize.STRING(50),
},
createdAt: {
allowNull: false,
field: "created_at",
type: Sequelize.DATE,
},
updatedAt: {
allowNull: false,
field: "updated_at",
type: Sequelize.DATE,
},
});
},
down: async (queryInterface, Sequelize) => {
await queryInterface.dropTable("roles");
},
};
"use strict";
const roles = [
"official",
"office",
"admin"
].map((role) => {
return {
name: role,
created_at: new Date(),
updated_at: new Date(),
};
});
module.exports = {
up: async (queryInterface, Sequelize) => {
await queryInterface.bulkInsert("roles", roles);
},
down: async (queryInterface, Sequelize) => {
await queryInterface.bulkDelete("roles", null, {});
},
};
"use strict";
const { Model } = require("sequelize");
module.exports = (sequelize, DataTypes) => {
class Role extends Model {
static associate(models) {
// define association here
}
}
Role.init(
{
roleId: {
allowNull: false,
autoIncrement: true,
field: "role_id", // SELECT role_id AS id
primaryKey: true,
type: DataTypes.INTEGER,
},
name: DataTypes.STRING,
description: DataTypes.STRING,
createdAt: {
type: DataTypes.DATE,
field: "created_at",
},
updatedAt: {
type: DataTypes.DATE,
field: "updated_at",
},
},
{
sequelize,
tableName: "roles",
modelName: "Role",
}
);
return Role;
};
const models = require("../models");
const catchAsync = require("../middlewares/catchAsync");
exports.findAll = catchAsync(async (req, res) => {
const roles = await models.Role.findAll();
/*
you can access
- role_id from db with roleId in JS
- created_at from db with createdAt in JS
*/
return res.status(200).json({
status: "success",
data: {
roles,
},
});
});
希望能有帮助