loopbackjs - 有没有办法替换 loopbackjs 中内置的 Models Endpoint 方法？

Question

我正在尝试替换 User 模型的内置 Create 方法以添加一些额外的自定义逻辑并根据我的需要重新格式化响应数据。有什么办法吗？

提前致谢

Answer 1

您需要声明一个新模型。然后，之后，手动为其添加一个base属性以从内置的 User 模型继承。

/common/models/custom-user.json

{
  "name": "customUser",
  "base": "User",
  "options": {
    "idInjection": false,
    "postgresql": {
      "schema": "public",
      "table": "user"
    }
  },
  "dataSource": "mypostgresDS",
  "properties": {
    "id": {
      "type": "number",
      "postgresql": {
        "columnName": "id",
        "dataType": "integer"
      }
    }
   ...
   ...
   }
}

然后你可以覆盖内置路由

/common/models/custom-user.js

module.exports = function (customUser) {

    // avoid looking for properties that your new model doesn't have
    var excludedProperties = [
        'realm',
        'emailVerified',
        'verificationToken',
        'credentials',
        'challenges',
        'lastUpdated',
        'created'
    ];

    // Remove the properties from base User model that doesn't have mapped columns
    excludedProperties.forEach(function (p) {
        delete customUser.definition.rawProperties[p];
        delete customUser.definition.properties[p];
        delete customUser.prototype[p];
    });

    customUser.prototype.createAccessToken = function (ttl, cb) {
        var user = this;
        if (ttl === undefined) ttl = 259200;
        var timenow = new Date().toISOString();
        console.log('ttl will be ', ttl, ' current time is ' + timenow);
        user.accessTokens.create({
            ttl: ttl
        }, cb);
    };


    customUser.prototype.checkPassword = function (password, stored_hash) {
        var user = this;
        console.log('I will overwrite this check to always return true');
        return true;
    };
});