火力地堡规则验证和追赶验证的Android应用程序失败

Question

设计

• 谁可以登录到用户登录应用
• 可以创建一个将其值将存储node可根据客户用户的当前登录用户ID中

当前DB值

{ 
    "customers" : { 
    "UserId1" : { 
     "custId1" : { 
     "customerCode" : "thk", 
     "customerLimit" : "58866", 
     "customerName" : "Test New " 
     }, 
     "custId2" : { 
     "customerCode" : "thh", 
     "customerLimit" : "5698", 
     "customerName" : "Yeth" 
     } 
    }, 
    "UserId2" : { 
     "custId3" : { 
     "customerCode" : "thh", 
     "customerLimit" : "5886", 
     "customerName" : "Test " 
     }, 
     "custId4" : { 
     "customerCode" : "tbh", 
     "customerLimit" : "58669", 
     "customerName" : "New Test" 
     } 
    } 
    } 
} 

以下是目前在firebase中为customers表定义的规则。

{ 
    "rules": { 
    "customers":{ 
     ".read": "auth != null", 
     ".write": "auth != null", 
     "$CID":{ 
      "customerName":{ 
       ".validate": "newData.isString() && newData.val().length < 100" 
      }, 
      "customerCode":{ 
       ".validate": "newData.isString() && newData.val().length<4 && !newData.exists()" 
      }, 
      "customerLimit":{} 
     } 
    } 
    } 
} 

尽管我已经定义，对于customerCode即它应该具有的值小于4个字符的规则，它是允许插入5个字符。另外我如何添加一个验证，验证每个userId的唯一性customerCode？截至目前它有!newData.exists()但它不工作。

任何人都可以请指导我在正确的方向吗？

Answer 1

我认为您最多可以插入5个字符，导致您的.length为newData.val().lenght从0开始，如array。在其他的方式，如果你想为每个用户id链接customerCode的独特性，你应该在你的火力点数据库中创建一个新表，喜欢的东西：

{ 
    "customers": { 
    "UserId1": { 
     "custId1": { 
     "customerCode": "customerId1", 
     "customerLimit": "58866", 
     "customerName": "Test New " 
     }, 
     "custId2": { 
     "customerCode": "customerId2", 
     "customerLimit": "5698", 
     "customerName": "Yeth" 
     } 
    }, 
    "UserId2": { 
     "custId3": { 
     "customerCode": "customerId3", 
     "customerLimit": "5886", 
     "customerName": "Test " 
     }, 
     "custId4": { 
     "customerCode": "customerId4", 
     "customerLimit": "58669", 
     "customerName": "New Test" 
     } 
    } 
    } 
    "customerCode": { 
    "custId1": { 
     "customerId1": "thh" 
    } 
    "custId2": { 
     "customerId2": "thk" 
    } 
    "custId3": { 
     "customerId3": "thh" 
    } 
    "custId4": { 
     "customerId4": "tbh" 
    } 
    } 
} 

使用这个模型，您可以修改规则，所以像这样的：

{ 
    "rules": { 
    "customers": { 
     ".read": "auth != null", 
     ".write": "auth != null", 
     "$CID": { 
     "customerName": { 
      ".validate": "newData.isString() && newData.val().length < 100" 
     }, 
     "customerCode": { 
      //Code shouls be string, less than 4 characters and it can't be already stored on customerCode table for the current userId 
      ".validate": "newData.isString() && newData.val().length<3 && !root.child('customerCode').child(auth.uid).exists()" 
     }, 
     "customerLimit": {} 
     } 
    } 
    "customerCode": { 
     "$CID": { 
     "CustomerCodeId": { 
      ".read": "auth != null", 
      ".write": "auth != null", 
     } 
     } 
    } 
    } 

也许规则不是在最后一个例子完美，但我敢肯定，你可以找到关于它如何能在你的应用程序拟合考虑看看关于firechat database rules的方式。我从这个知识库中学到了很多东西。希望它能帮助你！