有沒有辦法在loopbackjs中替換內置模型端點方法？

Question

我想要替換用戶模型的內置Create方法來添加一些額外的自定義邏輯並根據我的需要重新格式化響應數據。有什麼辦法可以做到嗎？

在此先感謝

Answer 1

您需要聲明一個新模型。然後，之後，手動添加base屬性以使其從內置User模型繼承。

/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" 
     } 
    } 
    ... 
    ... 
    } 
} 

然後你就可以在

/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; 
    }; 
}); 

覆蓋內置路線