blocks|key|2787160|text|您可以通过使用任何ref对象的函数key()来获取密钥。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|2787161|在Firebase的push+SDK中有两种调用JavaScript的方法。|blockquote|2787162|使用push(newObject)。这将生成一个新的push+id，并使用该id在该位置写入数据。|ordered-list-item|2787163|使用push()。这将生成一个新的push+id，并使用该id返回对位置的引用。这是一个纯粹的客户端操作。|2787164|了解#2之后，您可以很容易地获得一个新的push+id客户端：|2787165|var+newKey+=+ref.push().key()；|2787166|然后，您可以在多位置更新中使用此键。|2787167|https://stackoverflow.com/a/36774761/2305342|2787168|如果不带参数地调用Firebase+push()方法，则它是纯客户端操作。
var+newRef+=+ref.push()；//此不调用服务器
然后，可以将新引用的key()添加到项目中：
var+newItem+={+name：'anauleau‘id:+newRef.key()+}；
并将项目写入新位置：
newRef.set(newItem)；|2787169|https://stackoverflow.com/a/34437786/2305342|2787170|就你而言：|2787171|writeUserData()+{
++var+myRef+=+firebase.database().ref().push();
++var+key+=+myRef.key();

++var+newData={
++++++id:+key,
++++++Website_Name:+this.web_name.value,
++++++Username:+this.username.value,
++++++Password+:+this.password.value,
++++++website_link+:+this.web_link.value
+++}

+++myRef.push(newData);

}|code-block|syntax|javascript|2787172|entityMap|0|LINK|mutability|MUTABLE|url|1^0|H|5|0|A|4|0|2|F|0|2|6|0|0|0|0|0|18|0|0|I|6|2A|5|0|0|18|1|0|0|0^^$0|@$1|2|3|4|5|6|7|1E|8|@$9|1F|A|1G|B|C]]|D|@]|E|$]]|$1|F|3|G|5|H|7|1H|8|@$9|1I|A|1J|B|C]]|D|@]|E|$]]|$1|I|3|J|5|K|7|1K|8|@$9|1L|A|1M|B|C]]|D|@]|E|$]]|$1|L|3|M|5|K|7|1N|8|@$9|1O|A|1P|B|C]]|D|@]|E|$]]|$1|N|3|O|5|6|7|1Q|8|@]|D|@]|E|$]]|$1|P|3|Q|5|6|7|1R|8|@]|D|@]|E|$]]|$1|R|3|S|5|6|7|1S|8|@]|D|@]|E|$]]|$1|T|3|U|5|6|7|1T|8|@]|D|@$9|1U|A|1V|1|1W]]|E|$]]|$1|V|3|W|5|H|7|1X|8|@$9|1Y|A|1Z|B|C]|$9|20|A|21|B|C]]|D|@]|E|$]]|$1|X|3|Y|5|6|7|22|8|@]|D|@$9|23|A|24|1|25]]|E|$]]|$1|Z|3|10|5|6|7|26|8|@]|D|@]|E|$]]|$1|11|3|12|5|13|7|27|8|@]|D|@]|E|$14|15]]|$1|16|3|-4|5|6|7|28|8|@]|D|@]|E|$]]]|17|$18|$5|19|1A|1B|E|$1C|U]]|1D|$5|19|1A|1B|E|$1C|Y]]]]

You can get the key by using the function <code>key()</code> of any ref object

<blockquote>
 There are two ways to invoke <code>push</code> in Firebase's JavaScript SDK. 
 
 <ol>
 <li>using <code>push(newObject)</code>. This will generate a new push id and write the data at the location with that id.</li>
 <li>using <code>push()</code>. This will generate a new push id and return a reference to the location with that id. This is a pure client-side
 operation.</li>
 </ol>
 
 Knowing #2, you can easily get a new push id client-side with:

<pre><code>var newKey = ref.push().key();
</code></pre>
 
 You can then use this key in your multi-location update.
</blockquote>

<a href="https://stackoverflow.com/a/36774761/2305342">https://stackoverflow.com/a/36774761/2305342</a> 

<blockquote>
 If you invoke the Firebase <code>push()</code> method without arguments it is a
 pure client-side operation.

<pre><code>var newRef = ref.push(); // this does *not* call the server
</code></pre>
 
 You can then add the <code>key()</code> of the new ref to your item:

<pre><code>var newItem = {
 name: 'anauleau'
 id: newRef.key()
};
</code></pre>
 
 And write the item to the new location:

<pre><code>newRef.set(newItem);
</code></pre>
</blockquote>

<a href="https://stackoverflow.com/a/34437786/2305342">https://stackoverflow.com/a/34437786/2305342</a>

in your case :

<pre><code>writeUserData() {
 var myRef = firebase.database().ref().push();
 var key = myRef.key();

 var newData={
 id: key,
 Website_Name: this.web_name.value,
 Username: this.username.value,
 Password : this.password.value,
 website_link : this.web_link.value
 }

 myRef.push(newData);

}
</code></pre>

blocks|key|2787179|text|防火墙v3存储数据|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|2787180|function+writeNewPost(uid,+username,+picture,+title,+body)+{
++//+A+post+entry.
++var+postData+=+{
++++author:+username,
++++uid:+uid,
++++body:+body,
++++title:+title,
++++starCount:+0,
++++authorPic:+picture
++};

++//+Get+a+key+for+a+new+Post.
++var+newPostKey+=+firebase.database().ref().child('posts').push().key;

++//+Write+the+new+post's+data+simultaneously+in+the+posts+list+and+the+user's+post+list.
++var+updates+=+{};
++updates['/posts/'+%2B+newPostKey]+=+postData;
++updates['/user-posts/'+%2B+uid+%2B+'/'+%2B+newPostKey]+=+postData;

++return+firebase.database().ref().update(updates);
}|code-block|syntax|javascript|2787181|entityMap|0|LINK|mutability|MUTABLE|url|https://firebase.google.com/docs/database/web/save-data^0|0|9|0|0|0^^$0|@$1|2|3|4|5|6|7|Q|8|@]|9|@$A|R|B|S|1|T]]|C|$]]|$1|D|3|E|5|F|7|U|8|@]|9|@]|C|$G|H]]|$1|I|3|-4|5|6|7|V|8|@]|9|@]|C|$]]]|J|$K|$5|L|M|N|C|$O|P]]]]

<h3><a href="https://firebase.google.com/docs/database/web/save-data" rel="noreferrer">Firebase v3 Saving Data</a></h3>
<pre><code>function writeNewPost(uid, username, picture, title, body) {
 // A post entry.
 var postData = {
 author: username,
 uid: uid,
 body: body,
 title: title,
 starCount: 0,
 authorPic: picture
 };

 // Get a key for a new Post.
 var newPostKey = firebase.database().ref().child('posts').push().key;

 // Write the new post's data simultaneously in the posts list and the user's post list.
 var updates = {};
 updates['/posts/' + newPostKey] = postData;
 updates['/user-posts/' + uid + '/' + newPostKey] = postData;

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

blocks|key|2787201|text|现在看来，.push()总是返回一个可观察的。当应用上述解决方案时，我犯了以下错误："Type+'String‘没有兼容的调用签名“。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|2787202|话虽如此，我指的是这个新版本在我的案例中所起的作用：|2787203|类型“String”没有兼容的调用签名。|offset|length|2787204|entityMap|0|LINK|mutability|MUTABLE|url|https://stackoverflow.com/questions/40453955/type-string-has-no-compatible-call-signatures^0|0|0|0|K|0|0^^$0|@$1|2|3|4|5|6|7|P|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|Q|8|@]|9|@]|A|$]]|$1|D|3|E|5|6|7|R|8|@]|9|@$F|S|G|T|1|U]]|A|$]]|$1|H|3|-4|5|6|7|V|8|@]|9|@]|A|$]]]|I|$J|$5|K|L|M|A|$N|O]]]]

It looks like now .push() always returns an Observable. When applied the solutions above I had the following error: "Type 'String' has no compatible call signatures".

That being said, I refer what did work in my case for this new version:

<a href="https://stackoverflow.com/questions/40453955/type-string-has-no-compatible-call-signatures">Type &#39;String&#39; has no compatible call signatures</a>

blocks|key|1419510|text|这对我起了作用：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1419511|+var+insertData+=+firebase.database().ref().push(newData);
+var+insertedKey+=+insertData.getKey();+//+last+inserted+key|code-block|syntax|javascript|1419512|见此处：用火库保存数据。|offset|length|1419513|entityMap|0|LINK|mutability|MUTABLE|url|https://firebase.google.com/docs/database/admin/save-data^0|0|0|4|8|0|0^^$0|@$1|2|3|4|5|6|7|S|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|T|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|U|8|@]|9|@$I|V|J|W|1|X]]|A|$]]|$1|K|3|-4|5|6|7|Y|8|@]|9|@]|A|$]]]|L|$M|$5|N|O|P|A|$Q|R]]]]

This worked for me:

<pre><code> var insertData = firebase.database().ref().push(newData);
 var insertedKey = insertData.getKey(); // last inserted key
</code></pre>

See Here: <a href="https://firebase.google.com/docs/database/admin/save-data" rel="nofollow noreferrer">Saving data with firebase.</a>

blocks|key|1423129|text|您可以使用这样的承诺获得最后插入的项目id|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1423130|let+postRef+=+firebase.database().ref('/post');
postRef.push({+'name':+'Test+Value'+})
++++.then(res+=>+{
++++++++console.log(res.getKey())+//+this+will+return+you+ID
++++})
++++.catch(error+=>+console.log(error));|code-block|syntax|javascript|1423131|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|$]]

You can get last inserted item id using Promise like this

<pre><code>let postRef = firebase.database().ref('/post');
postRef.push({ 'name': 'Test Value' })
 .then(res =&gt; {
 console.log(res.getKey()) // this will return you ID
 })
 .catch(error =&gt; console.log(error));
</code></pre>

blocks|key|1423133|text|试试这个。它对我有效，|type|blockquote|depth|inlineStyleRanges|offset|length|style|BOLD|entityRanges|data|1423134|this.addressRef.push(addressObj).then(res+=>+{
++++console.log("address+key+=+"+%2B+res.key)+;
});|code-block|syntax|javascript|1423135|在这里，res.getKey()不能工作，但是使用res.key获取最新的推送ID|unstyled|1423136|entityMap^0|0|B|0|0|0^^$0|@$1|2|3|4|5|6|7|P|8|@$9|Q|A|R|B|C]]|D|@]|E|$]]|$1|F|3|G|5|H|7|S|8|@]|D|@]|E|$I|J]]|$1|K|3|L|5|M|7|T|8|@]|D|@]|E|$]]|$1|N|3|-4|5|M|7|U|8|@]|D|@]|E|$]]]|O|$]]

<blockquote>
 Try this . It worked for me
</blockquote>

<pre><code>this.addressRef.push(addressObj).then(res =&gt; {
 console.log("address key = " + res.key) ;
});
</code></pre>

Here res.getKey() will not work but use res.key to get the latest push ID

I am pushing data in firebase, but i want to store unique id in my database also .
can somebody tell me,how to push the data with unique id.

i am trying like this

<pre><code> writeUserData() {
 var key= ref.push().key();
 var newData={
 id: key,
 websiteName: this.webname.value,
 username: this.username.value,
 password : this.password.value,
 websiteLink : this.weblink.value
 }
 firebase.database().ref().push(newData);
 }
</code></pre>

error is "ReferenceError: ref is not defined"

In Firebase when using push() How do I get the unique ID and store in my database

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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我在firebase中推送数据，但我也想在我的数据库中存储唯一的id。有人能告诉我，如何用独特的id来推送数据吗？我试着像这样  writeUserData() {    var key= ref.push().key();    var newData={        id: key,        website...

问在Firebase中，当使用push()时，如何获得唯一的ID并将其存储在数据库中
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问在Firebase中，当使用push()时，如何获得唯一的ID并将其存储在数据库中EN