usage-with-javascript

TypeORM不仅可以与TypeScript一起使用，还可以与JavaScript一起使用。 除了省略类型之外，一切都是相同的。如果您的平台不支持ES6类，则需要使用所有必需的元数据定义对象。

app.js

var typeorm = require("typeorm")

var dataSource = new typeorm.DataSource({
    type: "postgres",
    host: "localhost",
    port: 5432,
    username: "test",
    password: "admin",
    database: "test",
    synchronize: true,
    entities: [require("./entity/Post"), require("./entity/Category")],
})

dataSource
    .initialize()
    .then(function () {
        var category1 = {
            name: "TypeScript",
        }
        var category2 = {
            name: "Programming",
        }

        var post = {
            title: "Control flow based type analysis",
            text: "TypeScript 2.0 implements a control flow-based type analysis for local variables and parameters.",
            categories: [category1, category2],
        }

        var postRepository = dataSource.getRepository("Post")
        postRepository
            .save(post)
            .then(function (savedPost) {
                console.log("Post has been saved: ", savedPost)
                console.log("Now lets load all posts: ")

                return postRepository.find()
            })
            .then(function (allPosts) {
                console.log("All posts: ", allPosts)
            })
    })
    .catch(function (error) {
        console.log("Error: ", error)
    })

entity/Category.js

var EntitySchema = require("typeorm").EntitySchema

module.exports = new EntitySchema({
    name: "Category", // 默认情况下将使用表名 `category`。
    tableName: "categories", // 可选: 提供 `tableName` 属性来覆盖表名的默认行为。
    columns: {
        id: {
            primary: true,
            type: "int",
            generated: true,
        },
        name: {
            type: "varchar",
        },
    },
})

entity/Post.js

var EntitySchema = require("typeorm").EntitySchema

module.exports = new EntitySchema({
    name: "Post", // 默认情况下将使用表名 `post`。
    tableName: "posts", // 可选: 提供 `tableName` 属性来覆盖表名的默认行为。
    columns: {
        id: {
            primary: true,
            type: "int",
            generated: true,
        },
        title: {
            type: "varchar",
        },
        text: {
            type: "text",
        },
    },
    relations: {
        categories: {
            target: "Category",
            type: "many-to-many",
            joinTable: true,
            cascade: true,
        },
    },
})

您可以查看这个示例 typeorm/javascript-example 以了解更多信息。