blocks|key|58028|text|就像..。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|58029|datetime+=+Time.now.to_datetime
=>+Sun,+26+Oct+2014+16:24:55+-0600+

datetime+>=+Date.today
=>+true

datetime+<+Date.tomorrow
=>+true

datetime+%2B=+1.day
=>+Mon,+27+Oct+2014+16:25:12+-0600

datetime+>=+Date.today
=>+true

datetime+>=+Date.tomorrow
=>+true+

datetime+<+(Date.tomorrow+%2B+1.day)
=>+false|code-block|syntax|javascript|58030|58031|entityMap^0|0|0|0^^$0|@$1|2|3|4|5|6|7|J|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|K|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|L|8|@]|9|@]|A|$]]|$1|H|3|-4|5|6|7|M|8|@]|9|@]|A|$]]]|I|$]]

Something like...

<pre><code>datetime = Time.now.to_datetime
=&gt; Sun, 26 Oct 2014 16:24:55 -0600 

datetime &gt;= Date.today
=&gt; true

datetime &lt; Date.tomorrow
=&gt; true

datetime += 1.day
=&gt; Mon, 27 Oct 2014 16:25:12 -0600

datetime &gt;= Date.today
=&gt; true

datetime &gt;= Date.tomorrow
=&gt; true 

datetime &lt; (Date.tomorrow + 1.day)
=&gt; false
</code></pre>

?

blocks|key|4564427|text|以下是实现这一目标的一些有用方法：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|4564428|datetime+=+DateTime.now++=>+Sun,+26+Oct+2014+21:00:00

datetime.today?+#+=>+true
datetime.to_date.past?+#+=>+false+(only+based+on+date)
datetime.to_date.future?+#+=>+false++(only+based+on+date)

datetime.to_date+==+Date.tomorrow+#+=>+false
datetime.to_date+==+Date.yesterday+#+=>+false|code-block|syntax|javascript|4564429|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 are some useful ways to achieve it:

<pre><code>datetime = DateTime.now =&gt; Sun, 26 Oct 2014 21:00:00

datetime.today? # =&gt; true
datetime.to_date.past? # =&gt; false (only based on date)
datetime.to_date.future? # =&gt; false (only based on date)

datetime.to_date == Date.tomorrow # =&gt; false
datetime.to_date == Date.yesterday # =&gt; false
</code></pre>

blocks|key|4564478|text|昨天？&明天？(Rails+6.1%2B)|type|unstyled|depth|inlineStyleRanges|entityRanges|data|4564479|Rails6.1向Date和Time类添加了新的#yesterday?和#tomorrow?方法。|offset|length|style|CODE|4564480|因此，现在，您的问题可以通过以下方式解决：|4564481|datetime+=+DateTime.current
#+=>+Mon,+16+Nov+2020+20:50:16+%2B0000


datetime.today?
#+=>+true

datetime.yesterday?
#+=>+false

datetime.tomorrow?
#+=>+false|code-block|syntax|javascript|4564482|值得一提的是，#yesterday?和#tomorrow?是#prev_day?和#next_day?的别名。|4564483|这是a+link+to+the+corresponding+PR。|4564484|entityMap|0|LINK|mutability|MUTABLE|url|https://edgeapi.rubyonrails.org/classes/DateAndTime/Calculations.html#method-i-yesterday-3F|1|https://edgeapi.rubyonrails.org/classes/DateAndTime/Calculations.html#method-i-tomorrow-3F|2|3|4|https://edgeapi.rubyonrails.org/classes/DateAndTime/Calculations.html#method-i-prev_day-3F|5|https://edgeapi.rubyonrails.org/classes/DateAndTime/Calculations.html#method-i-next_day-3F|6|https://github.com/rails/rails/pull/37625^0|0|O|B|10|A|O|B|0|10|A|1|0|0|0|7|B|J|A|U|A|15|A|7|B|2|J|A|3|U|A|4|15|A|5|0|2|U|6|0^^$0|@$1|2|3|4|5|6|7|1A|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|1B|8|@$D|1C|E|1D|F|G]|$D|1E|E|1F|F|G]]|9|@$D|1G|E|1H|1|1I]|$D|1J|E|1K|1|1L]]|A|$]]|$1|H|3|I|5|6|7|1M|8|@]|9|@]|A|$]]|$1|J|3|K|5|L|7|1N|8|@]|9|@]|A|$M|N]]|$1|O|3|P|5|6|7|1O|8|@$D|1P|E|1Q|F|G]|$D|1R|E|1S|F|G]|$D|1T|E|1U|F|G]|$D|1V|E|1W|F|G]]|9|@$D|1X|E|1Y|1|1Z]|$D|20|E|21|1|22]|$D|23|E|24|1|25]|$D|26|E|27|1|28]]|A|$]]|$1|Q|3|R|5|6|7|29|8|@]|9|@$D|2A|E|2B|1|2C]]|A|$]]|$1|S|3|-4|5|6|7|2D|8|@]|9|@]|A|$]]]|T|$U|$5|V|W|X|A|$Y|Z]]|10|$5|V|W|X|A|$Y|11]]|12|$5|V|W|X|A|$Y|Z]]|13|$5|V|W|X|A|$Y|11]]|14|$5|V|W|X|A|$Y|15]]|16|$5|V|W|X|A|$Y|17]]|18|$5|V|W|X|A|$Y|19]]]]

<h3>yesterday? &amp; tomorrow? (Rails 6.1+)</h3>
Rails 6.1 adds new <a href="https://edgeapi.rubyonrails.org/classes/DateAndTime/Calculations.html#method-i-yesterday-3F" rel="nofollow noreferrer"><code>#yesterday?</code></a> and <a href="https://edgeapi.rubyonrails.org/classes/DateAndTime/Calculations.html#method-i-tomorrow-3F" rel="nofollow noreferrer"><code>#tomorrow?</code></a> methods to Date and Time classes.
As a result, now, your problem can be solved as:
<pre class="lang-rb prettyprint-override"><code>datetime = DateTime.current
# =&gt; Mon, 16 Nov 2020 20:50:16 +0000


datetime.today?
# =&gt; true

datetime.yesterday?
# =&gt; false

datetime.tomorrow?
# =&gt; false
</code></pre>
It is also worth to mention that <a href="https://edgeapi.rubyonrails.org/classes/DateAndTime/Calculations.html#method-i-yesterday-3F" rel="nofollow noreferrer"><code>#yesterday?</code></a> and <a href="https://edgeapi.rubyonrails.org/classes/DateAndTime/Calculations.html#method-i-tomorrow-3F" rel="nofollow noreferrer"><code>#tomorrow?</code></a> are aliased to <a href="https://edgeapi.rubyonrails.org/classes/DateAndTime/Calculations.html#method-i-prev_day-3F" rel="nofollow noreferrer"><code>#prev_day?</code></a> and <a href="https://edgeapi.rubyonrails.org/classes/DateAndTime/Calculations.html#method-i-next_day-3F" rel="nofollow noreferrer"><code>#next_day?</code></a>.
Here is <a href="https://github.com/rails/rails/pull/37625" rel="nofollow noreferrer">a link to the corresponding PR</a>.

I have an object attribute of the DateTime class.

How would I understand if the saved date is today, tomorrow or else later?

Check if DateTime value is today, tomorrow or later

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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我有一个DateTime类的对象属性。我如何了解保存的日期是今天、明天还是以后？

问检查DateTime值是今天、明天还是以后
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问检查DateTime值是今天、明天还是以后EN