blocks|key|3951456|text|您可以将datetime对象存储为Unix+time+(自1970年1月1日以来的秒数)。然后您可以像这样简单地使用where+select：|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|3951457|collectionRef.where("startTime",+">=",+"1506816000").where("startTime",+"<=",+"1507593600")|style|CODE|3951458|顺便说一句--要在你的应用程序中将日期时间转换为Unix时间，你可以使用优秀的(现在已经被废弃的)库moment+(如果你正在用js或node构建一些东西)。|3951459|entityMap|0|LINK|mutability|MUTABLE|url|https://en.wikipedia.org/wiki/Unix_time|1|http://momentjs.com/^0|H|9|0|0|0|2J|0|1E|6|1|0^^$0|@$1|2|3|4|5|6|7|T|8|@]|9|@$A|U|B|V|1|W]]|C|$]]|$1|D|3|E|5|6|7|X|8|@$A|Y|B|Z|F|G]]|9|@]|C|$]]|$1|H|3|I|5|6|7|10|8|@]|9|@$A|11|B|12|1|13]]|C|$]]|$1|J|3|-4|5|6|7|14|8|@]|9|@]|C|$]]]|K|$L|$5|M|N|O|C|$P|Q]]|R|$5|M|N|O|C|$P|S]]]]

You could store the datetime object as <a href="https://en.wikipedia.org/wiki/Unix_time" rel="nofollow noreferrer">Unix time</a> (seconds since 1 January 1970). Then you can simple use the where select like this:
<code>collectionRef.where(&quot;startTime&quot;, &quot;&gt;=&quot;, &quot;1506816000&quot;).where(&quot;startTime&quot;, &quot;&lt;=&quot;, &quot;1507593600&quot;)</code>
Btw - to convert from datetime to Unix time in your app, you can use the excellent (now deprecated) library <a href="http://momentjs.com/" rel="nofollow noreferrer">moment</a> (if you are building something with js or node).

blocks|key|1538574|text|由于我在Cloud+Firestore上将dueDate字段存储为"timestamp“(而不是string或number)，因此我这样做是为了获得到期日为2017年的发票文档：|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|BOLD|entityRanges|data|1538575|let+start+=+new+Date('2017-01-01');
let+end+=+new+Date('2018-01-01');

this.afs.collection('invoices',+ref+=>+ref
++.where('dueDate',+'>',+start)
++.where('dueDate',+'<',+end)
);|code-block|syntax|javascript|1538576|注意：日期字段通过dueDate+()对象存储在firebase中。例如：this.doc.dueDate+=+new+Date('2017-12-25')|1538577|entityMap^0|L|7|1C|6|1J|6|0|0|0|3|9|7|11|15|0^^$0|@$1|2|3|4|5|6|7|P|8|@$9|Q|A|R|B|C]|$9|S|A|T|B|D]|$9|U|A|V|B|D]]|E|@]|F|$]]|$1|G|3|H|5|I|7|W|8|@]|E|@]|F|$J|K]]|$1|L|3|M|5|6|7|X|8|@$9|Y|A|Z|B|D]|$9|10|A|11|B|C]|$9|12|A|13|B|C]]|E|@]|F|$]]|$1|N|3|-4|5|6|7|14|8|@]|E|@]|F|$]]]|O|$]]

Since I have the <code>dueDate</code> field stored as &quot;timestamp&quot; (and NOT as string or number) on Cloud Firestore, I did this to get the invoice documents with a due date on 2017:
<pre class="lang-js prettyprint-override"><code>let start = new Date('2017-01-01');
let end = new Date('2018-01-01');

this.afs.collection('invoices', ref =&gt; ref
 .where('dueDate', '&gt;', start)
 .where('dueDate', '&lt;', end)
);
</code></pre>
NOTE: <code>dueDate</code> field was stored at firebase with a Date() object. e.g.: <code>this.doc.dueDate = new Date('2017-12-25')</code>

blocks|key|1538587|text|解决方案是使用Date.now()。停止使用Firebase的时间戳服务，您需要使用以毫秒为单位的时间数值，例如:+1514271367000，而如果Firestore使用26/12/2017+1:56:07+GMT-+0500+(-05)将不起作用。查询的一个例子是：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1538588|this.fsService.afs.collection('chats/4bY1ZpOr1TPq8bFQ3bjS/finance/123%2Bfinance/12345'
++++++++++,+ref+=>+ref.orderBy('hour').startAt(1514184967000).endAt(1514271367000))
++++++++++.valueChanges().subscribe(data+=>{
++++++++++++this.mensajes+=+data;
++++++++++})|code-block|syntax|javascript|1538589|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|$]]

The solution is to use Date.now(). Stop using timestamp service from Firebase, you need to work with the numerical value of the time in milliseconds like for example: 1514271367000, instead if Firestore uses 26/12/2017 1:56:07 GMT- 0500 (-05) will not work. An example of a query is:
<pre class="lang-js prettyprint-override"><code>this.fsService.afs.collection('chats/4bY1ZpOr1TPq8bFQ3bjS/finance/123+finance/12345'
 , ref =&gt; ref.orderBy('hour').startAt(1514184967000).endAt(1514271367000))
 .valueChanges().subscribe(data =&gt;{
 this.mensajes = data;
 })
</code></pre>

blocks|key|3951504|text|对于最近使用Firebase+Firestore的每个人来说，这取决于您的Firebase实现的设置(取决于firebase版本)。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|3951505|之前，Firestore将Timestamp保存为Date，然而，正如所描述的那样，here+in+the+docs将很快被Timestamp对象所取代。请参阅Timestamp+docs+here。|offset|length|style|CODE|3951506|您可以通过在代码中添加一个设置来强制Firebase使用时间戳对象而不是日期来强制实现，如下例所示：|BOLD|3951507|var+firebaseApp+=+firebase.initializeApp({
++++apiKey:+[APIKEY],
++++authDomain:+[FIREBASEAPPDOMAIN],
++++projectId:+[PROJECTID]
});

var+firestore+=+firebase.firestore();
var+settings+=+{+timestampsInSnapshots:+true+};+//+force+Timestamp+instead+of+Date
firestore.settings(settings);|code-block|syntax|javascript|3951508|entityMap|0|LINK|mutability|MUTABLE|url|https://firebase.google.com/docs/reference/js/firebase.firestore.Settings#%257EtimestampsInSnapshots|1|https://firebase.google.com/docs/reference/android/com/google/firebase/Timestamp^0|0|D|9|P|4|1Q|9|16|G|0|28|J|1|0|8|U|0|0^^$0|@$1|2|3|4|5|6|7|Z|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|10|8|@$D|11|E|12|F|G]|$D|13|E|14|F|G]|$D|15|E|16|F|G]]|9|@$D|17|E|18|1|19]|$D|1A|E|1B|1|1C]]|A|$]]|$1|H|3|I|5|6|7|1D|8|@$D|1E|E|1F|F|J]]|9|@]|A|$]]|$1|K|3|L|5|M|7|1G|8|@]|9|@]|A|$N|O]]|$1|P|3|-4|5|6|7|1H|8|@]|9|@]|A|$]]]|Q|$R|$5|S|T|U|A|$V|W]]|X|$5|S|T|U|A|$V|Y]]]]

For everyone recently using Firebase Firestore, there's a difference depending on your settings of your Firebase implementation (depending on the firebase version).
Before, Firestore was saving <code>Timestamp</code> as a <code>Date</code>, however as described <a href="https://firebase.google.com/docs/reference/js/firebase.firestore.Settings#%7EtimestampsInSnapshots" rel="nofollow noreferrer">here in the docs</a> the will be replaced soon by a <code>Timestamp</code> object. See the <a href="https://firebase.google.com/docs/reference/android/com/google/firebase/Timestamp" rel="nofollow noreferrer">Timestamp docs here</a>.
You can force your implementation already by adding a setting in your code to force Firebase to use Timestamp objects instead of Date like this example:
<pre><code>var firebaseApp = firebase.initializeApp({
 apiKey: [APIKEY],
 authDomain: [FIREBASEAPPDOMAIN],
 projectId: [PROJECTID]
});

var firestore = firebase.firestore();
var settings = { timestampsInSnapshots: true }; // force Timestamp instead of Date
firestore.settings(settings);
</code></pre>

blocks|key|1542565|text|在前端应用程序中，这就是如何使用Firebase时间戳和日期来查询和存储文档。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1542566|​|1542567|📷|atomic|offset|length|1542568|1542569|entityMap|0|IMAGE|mutability|IMMUTABLE|imageUrl|https://ask.qcloudimg.com/http-save/yehe-900000/dc36eaa1e656ac4640ccc21bdd1c7827.png|imageAlt^0|0|0|0|1|0|0|0^^$0|@$1|2|3|4|5|6|7|S|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|T|8|@]|9|@]|A|$]]|$1|D|3|E|5|F|7|U|8|@]|9|@$G|V|H|W|1|X]]|A|$]]|$1|I|3|C|5|6|7|Y|8|@]|9|@]|A|$]]|$1|J|3|-4|5|6|7|Z|8|@]|9|@]|A|$]]]|K|$L|$5|M|N|O|A|$P|Q|R|-4]]]]

In a frontend application, this is how Firebase timestamps and dates can be used to query and store documents.

<img src="https://i.stack.imgur.com/MiBqy.png" alt="Firestore date usage">

blocks|key|3951527|text|++++var+startfulldate+=+admin.firestore.Timestamp.fromDate(new+Date(1556062581000));
++++db.collection('mycollection')
++++++.where('start_time',+'<=',+startfulldate)
++++++.get()
++++++.then(snapshot+=>+{++++++++++++++
++++++++++++var+jsonvalue:+any[]+=+[];
++++++++++++snapshot.forEach(docs+=>+{
++++++++++++++jsonvalue.push(docs.data())
+++++++++++++++})
+++++++++++++++++res.send(jsonvalue);
+++++++++++++++++return;
++++++++++++++++}).catch(+error+=>+{
++++++++++++++++++++res.status(500).send(error)
++++++++++++++++});|type|code-block|depth|inlineStyleRanges|entityRanges|data|syntax|javascript|3951528|unstyled|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|G|8|@]|9|@]|A|$B|C]]|$1|D|3|-4|5|E|7|H|8|@]|9|@]|A|$]]]|F|$]]

<pre class="lang-js prettyprint-override"><code> var startfulldate = admin.firestore.Timestamp.fromDate(new Date(1556062581000));
 db.collection('mycollection')
 .where('start_time', '&lt;=', startfulldate)
 .get()
 .then(snapshot =&gt; { 
 var jsonvalue: any[] = [];
 snapshot.forEach(docs =&gt; {
 jsonvalue.push(docs.data())
 })
 res.send(jsonvalue);
 return;
 }).catch( error =&gt; {
 res.status(500).send(error)
 });
</code></pre>

blocks|key|3951530|text|const+event+=+new+Date();
const+expirationDate+=+admin.firestore.Timestamp.fromDate(event);
const+query+=+collectionRef.where('startTime',+'<=',+expirationDate)|type|code-block|depth|inlineStyleRanges|entityRanges|data|syntax|javascript|3951531|unstyled|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|G|8|@]|9|@]|A|$B|C]]|$1|D|3|-4|5|E|7|H|8|@]|9|@]|A|$]]]|F|$]]

<pre><code>const event = new Date();
const expirationDate = admin.firestore.Timestamp.fromDate(event);
const query = collectionRef.where('startTime', '&lt;=', expirationDate)
</code></pre>

blocks|key|1841749|text|那些像我一样使用PHP访问Firestore的人可以这样做：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1841750|$startTime+=+new+DateTime('2020-05-23+00:00:00');
$endTime+=+new+DateTime('2020-06-23+23:59:59');

$start+=+new+Google\Cloud\Core\Timestamp($startTime);
$end+=+new+Google\Cloud\Core\Timestamp($endTime);

//+fb+is+a+Google\Cloud\Firestore\FirestoreClient+object
$this->query+=+$this->fb->collection('your_collection');

$aux+=+$this->query;
$aux+=+$aux->where('startTime',+'<',+$end);
$aux+=+$aux->where('startTime',+'>',+$start);

return+$aux->documents();|code-block|syntax|javascript|1841751|好好享受吧。|1841752|entityMap^0|0|0|0^^$0|@$1|2|3|4|5|6|7|K|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|L|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|M|8|@]|9|@]|A|$]]|$1|I|3|-4|5|6|7|N|8|@]|9|@]|A|$]]]|J|$]]

Those who, like me, are using PHP to access Firestore, can do something like this:

<pre><code>$startTime = new DateTime('2020-05-23 00:00:00');
$endTime = new DateTime('2020-06-23 23:59:59');

$start = new Google\Cloud\Core\Timestamp($startTime);
$end = new Google\Cloud\Core\Timestamp($endTime);

// fb is a Google\Cloud\Firestore\FirestoreClient object
$this-&gt;query = $this-&gt;fb-&gt;collection('your_collection');

$aux = $this-&gt;query;
$aux = $aux-&gt;where('startTime', '&lt;', $end);
$aux = $aux-&gt;where('startTime', '&gt;', $start);

return $aux-&gt;documents();
</code></pre>

Enjoy.

blocks|key|1841761|text|按特定字段的日期范围在集合中查找文档的通用函数：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1841762|public+List<QueryDocumentSnapshot>+findDocsByDateRange(
++++++++++++++++++++++++++++++++++++++++++String+collection,+
++++++++++++++++++++++++++++++++++++++++++String+fieldStartDate,
++++++++++++++++++++++++++++++++++++++++++String+fieldEndDate,
++++++++++++++++++++++++++++++++++++++++++Date+startDate,+
++++++++++++++++++++++++++++++++++++++++++Date+endDate)+{
++++ApiFuture<QuerySnapshot>+querySnapshot+=+fireStore()
++++++++.collection(collection)
++++++++++++.whereGreaterThanOrEqualTo(FieldPath.of(fieldStartDate),+startDate)
++++++++++++++++.whereLessThanOrEqualTo(FieldPath.of(fieldEndDate),+endDate)
++++++++++++++++++++.get();
++++return+querySnapshot.get().getDocuments();
}|code-block|syntax|javascript|1841763|包：|1841764|import+com.google.api.core.ApiFuture;
import+com.google.cloud.firestore.DocumentSnapshot;
import+com.google.cloud.firestore.FieldPath;
import+com.google.cloud.firestore.Firestore;
import+com.google.cloud.firestore.QueryDocumentSnapshot;
import+com.google.cloud.firestore.QuerySnapshot;|1841765|entityMap^0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|M|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|N|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|O|8|@]|9|@]|A|$]]|$1|I|3|J|5|D|7|P|8|@]|9|@]|A|$E|F]]|$1|K|3|-4|5|6|7|Q|8|@]|9|@]|A|$]]]|L|$]]

Generic function to find documents in a collection by date range of specifics fields:
<pre><code>public List&lt;QueryDocumentSnapshot&gt; findDocsByDateRange(
 String collection, 
 String fieldStartDate,
 String fieldEndDate,
 Date startDate, 
 Date endDate) {
 ApiFuture&lt;QuerySnapshot&gt; querySnapshot = fireStore()
 .collection(collection)
 .whereGreaterThanOrEqualTo(FieldPath.of(fieldStartDate), startDate)
 .whereLessThanOrEqualTo(FieldPath.of(fieldEndDate), endDate)
 .get();
 return querySnapshot.get().getDocuments();
}
</code></pre>
Packages:
<pre><code>import com.google.api.core.ApiFuture;
import com.google.cloud.firestore.DocumentSnapshot;
import com.google.cloud.firestore.FieldPath;
import com.google.cloud.firestore.Firestore;
import com.google.cloud.firestore.QueryDocumentSnapshot;
import com.google.cloud.firestore.QuerySnapshot;
</code></pre>

blocks|key|1542595|text|对我有效的是格式的日期和Moment+JS，并分为日、月和年|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1542596|const+currentDate+=+moment().format("DD-MM-YYYY").split("-");
const+currentDay+=+currentDate[0];
const+currentMonth+=+currentDate[1];
const+currentYear+=+currentDate[2];


const+allDocuments+=+await+collectionRef
.doc(docId)
.collection(*COLLECTION+NAME*)
.where(
++*DATE+PARAMETER+NAME*,
++">=",
++new+Date(`${currentYear}-${currentMonth}-${currentDay}`)
)
.where(
++*DATE+PARAMETER+NAME*,
++"<",
//+${parseInt(currentDay)+%2B+*Number+of+days+you+want+in+range*}+
++new+Date(`${currentYear}-${currentMonth}-${parseInt(currentDay)+%2B+1}`)
)
.get();|code-block|syntax|javascript|1542597|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|$]]

What worked for me was
Format Date with Moment JS and split into Day, Month &amp; Year
<pre><code>const currentDate = moment().format(&quot;DD-MM-YYYY&quot;).split(&quot;-&quot;);
const currentDay = currentDate[0];
const currentMonth = currentDate[1];
const currentYear = currentDate[2];


const allDocuments = await collectionRef
.doc(docId)
.collection(*COLLECTION NAME*)
.where(
 *DATE PARAMETER NAME*,
 &quot;&gt;=&quot;,
 new Date(`${currentYear}-${currentMonth}-${currentDay}`)
)
.where(
 *DATE PARAMETER NAME*,
 &quot;&lt;&quot;,
// ${parseInt(currentDay) + *Number of days you want in range*} 
 new Date(`${currentYear}-${currentMonth}-${parseInt(currentDay) + 1}`)
)
.get();
</code></pre>

blocks|key|1841833|text|由于startTime存储为Timestamp，您可以执行此查询范围以获得更准确的结果(这对于长日期范围或相同日期范围的条件都很好)。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|1841834|const+start+=+new+Date('2021-01-01T00:00:00.000z');
const+end+=+new+Date('2021-03-01T23:59:59.000z');

db.collection('Data').where('startTime',+'>=',+start).where('startTime',+'<=',+end).get().then(data+=>+{
+++//pass+your+'data'+here
});|code-block|syntax|javascript|1841835|我在我的Node.js应用程序中使用了这个。希望这是有用的。|1841836|entityMap^0|2|9|E|9|0|0|0^^$0|@$1|2|3|4|5|6|7|O|8|@$9|P|A|Q|B|C]|$9|R|A|S|B|C]]|D|@]|E|$]]|$1|F|3|G|5|H|7|T|8|@]|D|@]|E|$I|J]]|$1|K|3|L|5|6|7|U|8|@]|D|@]|E|$]]|$1|M|3|-4|5|6|7|V|8|@]|D|@]|E|$]]]|N|$]]

As <code>startTime</code> stored as <code>Timestamp</code>, you can do this query range for more accururate (this good for both condition of long date range or same date range).
<pre><code>const start = new Date('2021-01-01T00:00:00.000z');
const end = new Date('2021-03-01T23:59:59.000z');

db.collection('Data').where('startTime', '&gt;=', start).where('startTime', '&lt;=', end).get().then(data =&gt; {
 //pass your 'data' here
});
</code></pre>
I used this in my Node.js apps. Hopefully this useful.

blocks|key|5369336|text|我想这会帮到你的|type|unstyled|depth|inlineStyleRanges|entityRanges|data|5369337|yourMethod()+{
++++var+date+=+DateTime.now();//
++++print("First+Date+>+"+%2B+DateTime(date.year,+date.month,+1).toString());
++++var+datex+=+new+DateTime(date.year,+date.month+%2B+1,+0);
++++print("Last+Date+>+"+%2Bdatex);//
++++//
++++Firestore.instance
++++++++.collection('biling')
++++++++.where("driverId",+isEqualTo:+widget.uid)
++++++++.where("date",
++++++++++++isGreaterThanOrEqualTo:
++++++++++++++++new+DateTime(date.year,+date.month,+1).toString())//1
++++++++.where("date",+isLessThanOrEqualTo:+datex.toString())//2
++++++++.orderBy('date',+descending:+true)
++++++++.getDocuments()
++++++++.then(
++++++++++(QuerySnapshot+snapshot)+=>+{
++++++++++++snapshot.documents.forEach((f)+{
++++++++++++++if+(this.mounted)+{
++++++++++++++++setState(()+{
++++++++++++++++++totalP+%2B=+double.tryParse(f.data["price"]);
++++++++++++++++});
++++++++++++++}
++++++++++++++print("_price+"+%2B+f.data["price"]);
++++++++++++++print("_duePaymntForCompay+"+%2B+f.data["duePaymntForCompay"]);
++++++++++++}),
++++++++++},
++++++++);
++}|code-block|syntax|javascript|5369338|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|$]]

I think this will help you out,
<pre><code>yourMethod() {
 var date = DateTime.now();//
 print(&quot;First Date &gt; &quot; + DateTime(date.year, date.month, 1).toString());
 var datex = new DateTime(date.year, date.month + 1, 0);
 print(&quot;Last Date &gt; &quot; +datex);//
 //
 Firestore.instance
 .collection('biling')
 .where(&quot;driverId&quot;, isEqualTo: widget.uid)
 .where(&quot;date&quot;,
 isGreaterThanOrEqualTo:
 new DateTime(date.year, date.month, 1).toString())//1
 .where(&quot;date&quot;, isLessThanOrEqualTo: datex.toString())//2
 .orderBy('date', descending: true)
 .getDocuments()
 .then(
 (QuerySnapshot snapshot) =&gt; {
 snapshot.documents.forEach((f) {
 if (this.mounted) {
 setState(() {
 totalP += double.tryParse(f.data[&quot;price&quot;]);
 });
 }
 print(&quot;_price &quot; + f.data[&quot;price&quot;]);
 print(&quot;_duePaymntForCompay &quot; + f.data[&quot;duePaymntForCompay&quot;]);
 }),
 },
 );
 }
</code></pre>

I need the help to query long collection with date range. See the below example document. I wanna query startTime field using date range.

<img src="https://i.stack.imgur.com/MnoH8.png" alt="enter image description here">

<a href="https://i.stack.imgur.com/ICxf7.png" rel="noreferrer"><img src="https://i.stack.imgur.com/ICxf7.png" alt="enter image description here"></a>

Firestore query by date range

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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我需要的帮助，以查询与日期范围长收集。请参阅下面的示例文档。我想用日期范围查询startTime字段。​​​​

问Firestore按日期范围查询
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