blocks|key|3335291|text|只需使用如下所示的常规firebase方法即可：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|3335292|var+updates+=+{};
++updates['/users/'+%2B+userId]+=+newUserData;

return+firebase.database().ref().update(updates);|code-block|syntax|javascript|3335293|您的作用域中绑定到列表的任何内容都将反映此更新。|3335294|Read+and+Write+Data+on+the+Web|offset|length|3335295|entityMap|0|LINK|mutability|MUTABLE|url|https://firebase.google.com/docs/database/web/read-and-write^0|0|0|0|0|U|0|0^^$0|@$1|2|3|4|5|6|7|U|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|V|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|W|8|@]|9|@]|A|$]]|$1|I|3|J|5|6|7|X|8|@]|9|@$K|Y|L|Z|1|10]]|A|$]]|$1|M|3|-4|5|6|7|11|8|@]|9|@]|A|$]]]|N|$O|$5|P|Q|R|A|$S|T]]]]

Just do it with a regular firebase method like this:

<pre><code>var updates = {};
 updates['/users/' + userId] = newUserData;

return firebase.database().ref().update(updates);
</code></pre>



Anything in your scope that is bound to your list will reflect the update.

<a href="https://firebase.google.com/docs/database/web/read-and-write" rel="nofollow noreferrer">Read and Write Data on the Web</a>

blocks|key|2287478|text|对Angularfire2使用如下所示的方法|type|unstyled|depth|inlineStyleRanges|entityRanges|data|2287479|addCustomKey+(key,+value)+{
++++const+toSend+=+this.af.database.object(`/users/${key}`);
++++toSend.set(value);
}|code-block|syntax|javascript|2287480|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

Use a method like below with Angularfire2 

<pre><code>addCustomKey (key, value) {
 const toSend = this.af.database.object(`/users/${key}`);
 toSend.set(value);
}
</code></pre>

blocks|key|375761|text|下面是可用于AngularFire2的另一种方法|type|unstyled|depth|inlineStyleRanges|entityRanges|data|375762|addCustomKey(key,+value)+{
++++const+users+=+this.af.database.object('/users');
++++users.update({+[key]:+value+});
}|code-block|syntax|javascript|375763|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

Here is another method you can use with AngularFire2

<pre><code>addCustomKey(key, value) {
 const users = this.af.database.object('/users');
 users.update({ [key]: value });
}
</code></pre>

blocks|key|3335341|text|vanilla+js看起来像这样：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|3335342|//to+generate+a+key+do+something+like
var+id+=+'xxxxxxxx-xxxx-4xxx-yxxx-xxxxxxxxxxxx'.replace(/[xy]/g,+function(c)+{
++var+r+=+Math.random()*16%7C0,+v+=+c+==+'x'+?+r+:+(r&0x3%7C0x8);
++return+v.toString(16);
});

function+setNode(key){
++if+(key){
++++var+thisRef+=+ref.child('testLocation');
++++var+obj+=+{};
++++obj[key]+=+true;
++++thisRef.update(obj,+onComplete);
++}
}|code-block|syntax|javascript|3335343|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

vanilla js looks something like this:

<pre><code>//to generate a key do something like
var id = 'xxxxxxxx-xxxx-4xxx-yxxx-xxxxxxxxxxxx'.replace(/[xy]/g, function(c) {
 var r = Math.random()*16|0, v = c == 'x' ? r : (r&amp;0x3|0x8);
 return v.toString(16);
});

function setNode(key){
 if (key){
 var thisRef = ref.child('testLocation');
 var obj = {};
 obj[key] = true;
 thisRef.update(obj, onComplete);
 }
}
</code></pre>

blocks|key|2283391|text|push会添加一个推送键，只需使用update方法：|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|2283392|this.yourRef+=+this.af.database.list('users');
let+userId+=+"UID",+
userInfos+=+{+data:+"your+user+datas"+};

this.yourRef.update(userId,+userInfos);|code-block|syntax|javascript|2283393|entityMap^0|0|4|H|6|0|0^^$0|@$1|2|3|4|5|6|7|M|8|@$9|N|A|O|B|C]|$9|P|A|Q|B|C]]|D|@]|E|$]]|$1|F|3|G|5|H|7|R|8|@]|D|@]|E|$I|J]]|$1|K|3|-4|5|6|7|S|8|@]|D|@]|E|$]]]|L|$]]

<code>push</code> will add a push key, just use the <code>update</code> method:

<pre><code>this.yourRef = this.af.database.list('users');
let userId = "UID", 
userInfos = { data: "your user datas" };

this.yourRef.update(userId, userInfos);
</code></pre>

blocks|key|2283395|text|传入您的自定义密钥，在本例中为projectKey，它是您从某个位置填充的变量：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|2283396|private+whatEverName(projectKey)+{
++++this.projectKey+=+projectKey;
++++this.af.object('/Projects/'+%2B+this.projectKey);
}|code-block|syntax|javascript|2283397|在代码中的某个地方调用whatEverName(projectKey)，您就有了一个自定义的节点键。此建议截至2017年7月25日有效。|2283398|我在这里添加了更多，以帮助那些试图创建一个子节点的人使用另一个推键作为自定义键来创建一个子节点。这对于该项目下的关联索引非常有用，例如在该项目上工作的用户列表。您可能不想在项目数据中包含此列表，但可以通过查询来获取它。这使得数据的非正规化变得更容易，并且拥有更扁平的架构，Firebase的目标。|2283399|在本例中，该关联节点名为ProjectsMembers，我们在其中记录了项目的所有者。以同样的方式添加其他用户节点。注意的反引号！单引号不起作用。在本例中，我设置了一个所有者名称作为对按键的引用。更容易在数据库中读取。|offset|length|style|BOLD|2283400|//+Add+child+node+with+project+key+as+push+key+to+the+association+index.
this.af.object(`ProjectsMembers/${projectKey}/`+%2B+this.ownerKey)
+++.set({+ownerName:+this.ownerName+});|2283401|entityMap^0|0|0|0|0|1O|5|0|0^^$0|@$1|2|3|4|5|6|7|U|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|V|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|W|8|@]|9|@]|A|$]]|$1|I|3|J|5|6|7|X|8|@]|9|@]|A|$]]|$1|K|3|L|5|6|7|Y|8|@$M|Z|N|10|O|P]]|9|@]|A|$]]|$1|Q|3|R|5|D|7|11|8|@]|9|@]|A|$E|F]]|$1|S|3|-4|5|6|7|12|8|@]|9|@]|A|$]]]|T|$]]

Pass in your custom key, in this case projectKey which is a variable you populate from somewhere:

<pre><code>private whatEverName(projectKey) {
 this.projectKey = projectKey;
 this.af.object('/Projects/' + this.projectKey);
}
</code></pre>

Call whatEverName(projectKey) in your code somewhere and you have a custom node key. This advice is current as of 25 July, 2017.

I've added a bit more here to help those who are trying to create a child node to the one above with another push key as a custom key. This is useful for an association index under that project, such as a list of users working on that project. You may not want this list in the project data but get it by query. This makes it easier to denormalize the data and have a flatter architecture, the Firebase goal.

That association node is called ProjectsMembers in this case and we are recording the project's owner in it. Add other user nodes the same way. Notice the backticks!!! Single quotes won't work. In this case I set an owner name as a reference to push key. Easier to read in the db.

<pre><code>// Add child node with project key as push key to the association index.
this.af.object(`ProjectsMembers/${projectKey}/` + this.ownerKey)
 .set({ ownerName: this.ownerName });
</code></pre>

blocks|key|3335376|text|正如上面的许多答案中提到的，调用push()将为您生成一个密钥。这是另一种方法。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|3335377|相反，如果您想要为自己设置自定义密钥来确定密钥/路径，则必须使用child()。如下所示：|3335378|firebase.database.ref().child('/path/with/custom/key/goes/here').set();|3335379|在您的示例中，要使用用户的身份验证ID，方法如下：|3335380|export+class+SomeClass+{

++++uid:+string;

++++constructor(public+afDB:+AngularFireDatabase,+public+afAuth:+AngularFireAuth)+{

++++++++++//+Get+User+Auth+ID
++++++++++afAuth.authState.subscribe(user+=>+{
++++++++++++this.uid+=+user.uid;
++++++++++});
++++++}

++++//Your+method
++++this.afDB.database.ref().child(`users/${this.uid}/`).set(user);
}|code-block|syntax|javascript|3335381|entityMap^0|G|6|0|W|7|0|0|1Z|0|0|0^^$0|@$1|2|3|4|5|6|7|S|8|@$9|T|A|U|B|C]]|D|@]|E|$]]|$1|F|3|G|5|6|7|V|8|@$9|W|A|X|B|C]]|D|@]|E|$]]|$1|H|3|I|5|6|7|Y|8|@$9|Z|A|10|B|C]]|D|@]|E|$]]|$1|J|3|K|5|6|7|11|8|@]|D|@]|E|$]]|$1|L|3|M|5|N|7|12|8|@]|D|@]|E|$O|P]]|$1|Q|3|-4|5|6|7|13|8|@]|D|@]|E|$]]]|R|$]]

As mentioned in many of the answers above, calling <code>push()</code> will generate a key for you. Here's an alternative approach.

Instead, you have to use <code>child()</code> if you want set your custom key to determine the key/path for yourself. Like so: 

<code>firebase.database.ref().child('/path/with/custom/key/goes/here').set();</code>

In your case, to use the user's authentication ID, here's how you approach it:

<pre><code>export class SomeClass {

 uid: string;

 constructor(public afDB: AngularFireDatabase, public afAuth: AngularFireAuth) {

 // Get User Auth ID
 afAuth.authState.subscribe(user =&gt; {
 this.uid = user.uid;
 });
 }

 //Your method
 this.afDB.database.ref().child(`users/${this.uid}/`).set(user);
}
</code></pre>

blocks|key|3335394|text|这是我建议的最简单的方法。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|3335395|import+{+Component,+OnInit+}+from+'@angular/core';
import+{+AngularFireDatabase+}+from+'@angular/fire/database';

@Component({
++selector:+'app-mycomponent',
++templateUrl:+'./mycomponent.page.html',
++styleUrls:+['./mycomponent.page.scss'],
})
export+class+MyComponent+implements+OnInit+{

++constructor(
++++private+db:+AngularFireDatabase
++)+{+}

++ngOnInit()+{}

++submit(user)+{
++++this.db.database.ref('users').child('your_custom_key').set(user)
++}
}|code-block|syntax|javascript|3335396|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

This is the simplest approach I'm suggesting.
<pre><code>import { Component, OnInit } from '@angular/core';
import { AngularFireDatabase } from '@angular/fire/database';

@Component({
 selector: 'app-mycomponent',
 templateUrl: './mycomponent.page.html',
 styleUrls: ['./mycomponent.page.scss'],
})
export class MyComponent implements OnInit {

 constructor(
 private db: AngularFireDatabase
 ) { }

 ngOnInit() {}

 submit(user) {
 this.db.database.ref('users').child('your_custom_key').set(user)
 }
}

</code></pre>

Currently I am using: 

<pre><code>this.af.database.list('users').push(user);
</code></pre>

How can I make the key of the object that is submitted be custom.
So I want to be able to set the node of this object to the same uid of the registered user. I have access to this Id I just need to be able to know how to make the custom user objects node not be the auto generated id when pushing.

Thanks

AngularFire2 how to use your own custom key instead of the auto generated one

翻译质量差，导致语言生硬或混乱。

没有提供实际的解决方法或示例。

解答不清晰，无法理解或解决问题。

页面排版不美观，阅读体验差。

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目前我使用的是：this.af.database.list('users').push(user);如何使提交的对象的key成为自定义对象。因此，我希望能够将此对象的节点设置为与注册用户相同的uid。我有权访问这个Id，我只需要知道如何使自定义用户对象节点在推送时不是自动生成的id。谢谢

问AngularFire2如何使用您自己的自定义密钥而不是自动生成的密钥
EN

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问AngularFire2如何使用您自己的自定义密钥而不是自动生成的密钥EN