有没有办法在loopbackjs中替换内置模型端点方法？

Question

我想要替换用户模型的内置Create方法来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。有什么办法可以做到吗？

在此先感谢

Answer 1

您需要声明一个新模型。然后，之后，手动添加base属性以使其从内置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" 
     } 
    } 
    ... 
    ... 
    } 
} 

然后你就可以在

/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; 
    }; 
}); 

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