Validation 避免创建额外的儿童Firebase
我是firebase的新手,我想知道如何解决有关hasChildren()RuleDataSnapshot的问题,以及如何验证将创建的数据 db的样本:Validation 避免创建额外的儿童Firebase,validation,firebase,rules,Validation,Firebase,Rules,我是firebase的新手,我想知道如何解决有关hasChildren()RuleDataSnapshot的问题,以及如何验证将创建的数据 db的样本: { "visitors" : { "-KP4BiB4c-7BwHwdsfuK" : { "mail" : "aaa@mail.com", "name" : "aaa", } ..... } 规则: { "rules": { "visitors": {
{
"visitors" : {
"-KP4BiB4c-7BwHwdsfuK" : {
"mail" : "aaa@mail.com",
"name" : "aaa",
}
.....
}
规则:
{
"rules": {
"visitors": {
".read": "auth != null",
".write": "auth.uid != null",
"$unique-id": {
".read": "auth != null ",
".write": "auth != null",
".validate": "newData.hasChildren(['name','mail'])",
}
}
}
}
据我所知,如果要创建数据,数据字段必须具有相同的名称才能通过规则验证。
例如:
如果我按“名称”更改“名称”,并尝试使用其子节点创建一个新节点,则规则将尽我所能工作。
我想知道如果我手动添加一个新字段来创建会发生什么
例如:
//Add extra fields which are not actually present
var data = {name : "xxx",mail:"xxx@mail.com",extra1:222,extra:333};
firebase.database().ref('visitors/').push(data);
结果是:
"visitors" : {
"-KP4BiB4c-7BwHwdsfuK" : {
"mail" : "aaa@mail.com",
"name" : "juan",
"extra1":222,
"extra2":333
}
}
所以我的问题是如何避免在每个节点上创建额外的子节点?我想是规则造成的
提前感谢。您的验证规则规定您的帖子必须至少有这些子项,而不仅仅是这些子项。 为确保不能添加其他子项,您必须将以下内容添加到规则中:
{
"rules": {
"visitors": {
".read": "auth != null",
".write": "auth.uid != null",
"$unique-id": {
".read": "auth != null ",
".write": "auth != null",
//This line says the new data must have ATLEAST these children
".validate": "newData.hasChildren(['name','mail'])",
//You can add individual validation for name and mail here
"name": { ".validate": true },
"mail": { ".validate": true },
//This rule prevents validation of data with more child than defined in the 2 lines above (or more if you specify more children)
"$other": { ".validate": false }
}
}
}
}
再看一个例子