Question

有人可以用Sequelize.js中的自定义联结表向我展示N：M关联的2019年示例（对同一模型）吗？

我正在尝试建立User模型的朋友系统。我的系统（上述）在Windows上运行良好，但在Linux上却无法运行（似乎再次遇到字母问题），因此我想举一个完整的示例，说明在哪里都能奏效。

我当前的代码：型号User：

const model = sequelize.define("User", {
        username: {
            type: DataTypes.STRING(32),
            unique: true,
            allowNull: false
        },
        ...
    }, {});

    model.associate = models => {
        model.belongsToMany(model, {
            through: "Friends", //I also tried models.Friend but it not work on both
            as: "friend",
            foreignKey: "user_id" //I also tried models.Friend.user_id but it not work on both
        });

        model.belongsToMany(model, {
            through: "Friends", //I also tried models.Friend but it not work on both
            as: "friendof",
            foreignKey: "friend_id" //I also tried models.Friend.friend_id_id but it not work on both
        });
    };

    return model;

模型Friend：

module.exports = (sequelize, DataTypes) => {
    const model = sequelize.define("Friend", {
        active: {
            type: DataTypes.BOOLEAN,
            allowNull: false,
            defaultValue: false
        }
    }, {
        hooks: {}
    });

    model.associate = models => {
        // User have many Users as Friends
        model.belongsTo(models.User, {
            foreignKey: "user_id"
        });

        model.belongsTo(models.User, {
            foreignKey: "friend_id"
        });
    };

    return model;
};

在Windows环境（XAMPP，MariaDB）上运行良好，但在Linux（相同版本的DB和Sequelize）上则无法运行。由于尝试创建两个表（friends，Friends）而失败。当我使用through: models.Friend时，它可以工作，但是Friend表中没有id。

Sequelize.js-具有自定义连接表的N：M的示例（本身）

0 个答案: